U.S. patent number 3,806,074 [Application Number 05/122,021] was granted by the patent office on 1974-04-23 for interior and fascia overhang forms for concrete and related components, support systems and methods.
Invention is credited to James S. Ward.
United States Patent |
3,806,074 |
Ward |
April 23, 1974 |
INTERIOR AND FASCIA OVERHANG FORMS FOR CONCRETE AND RELATED
COMPONENTS, SUPPORT SYSTEMS AND METHODS
Abstract
Forms are provided for molding concrete on horizontal I-beams,
the forms being adjustable from a position above the beams. With
respect to the interior space between two beams, clips and/or
hangers suspend bolts adjacent the beams, the bolts being
threadably engaged with brackets between which extend a joist, the
joist being located below and in overlapping relation with the
upper flanges of the beams. The bolts are rotatable from a position
atop the beams to adjust the brackets to control the locating of
the joist. Sheeting supported on the joist constitutes a support or
mold for wet concrete. The joist and brackets along with the bolts
as well as other components constitute a portable unit which can be
assembled according to a template or other such plan at a station
removed from the beams whereafter this unit can be dropped into
position between the beams. A relatively small U-shaped clip can be
used to support the bolts. With respect to the fascia overhang
form, a system of two combined triangles having pivoted legs one of
which is in part shared in common is employed. The length of one
leg is adjustable from atop the beam from which this system is
suspended so that the location of a wale attached to the system can
be controlled.
Inventors: |
Ward; James S. (Omaha, NB) |
Family
ID: |
22400099 |
Appl.
No.: |
05/122,021 |
Filed: |
March 8, 1971 |
Current U.S.
Class: |
248/228.1;
249/24; 249/23; 249/211 |
Current CPC
Class: |
E04G
13/066 (20130101); E04G 17/18 (20130101); E04G
13/06 (20130101) |
Current International
Class: |
E04G
17/18 (20060101); E04G 13/06 (20060101); E04G
13/00 (20060101); E04g 011/00 () |
Field of
Search: |
;248/228,242
;249/23,24,25,219R,219W |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Schultz; William M.
Attorney, Agent or Firm: Waters, Roditi, Schwartz &
Nissen
Claims
What is claimed is:
1. Apparatus for supporting a load bearing member from a beam
having a web and upper flange on the web, said apparatus comprising
first and second legs pivotally connected to each other, suspension
means suspending said first leg from said flange, pivot means
connecting said second leg to said load bearing member, and
adjustment means pivotally connecting said first leg to said load
bearing member at a position spaced from said pivot means, said
adjustment means being controllable through said first leg to
adjust the effective length of the latter whereby to tilt said load
bearing member.
2. Apparatus as claimed in claim 1 comprising third and fourth legs
pivotally connected together, said third leg being fixed to the
load bearing member, said first and second legs being pivotally
connected at spaced positions to said third leg and thus to said
load bearing member, said fourth leg including an end remote from
said third leg adapted to bear against said beam at a position
below and spaced from said upper flange.
3. Apparatus as claimed in claim 2 comprising clamping means on
said first leg pivotally connecting said second leg to the first
leg and cooperating with said suspension means to clamp the flange
therebetween.
4. Apparatus as claimed in claim 3 wherein said fourth leg is of
adjustable length.
5. Apparatus as claimed in claim 3 comprising limit means connected
between said third and fourth legs to limit the angular
displacement therebetween.
6. Apparatus as claimed in claim 3 wherein said first leg is a
threaded bolt and said adjustment means is in threaded engagement
therewith, said bolt extending through and above said suspension
means whereby to be engageable above the beam for adjustment of
said adjustment means.
7. Apparatus as claimed in claim 6 wherein said load bearing member
includes two planks, said third leg including two facing angles
connected to said planks, said adjustment means including a
threaded element pivotally connected between said angles.
8. Apparatus as claimed in claim 7 wherein said pivot means
includes a pin extending between said two angles and spaced straps
connected between said pin and first leg.
9. Apparatus as claimed in claim 6 comprising a first nut on said
bolt for transferring load from said bolt to said suspension means
and a second nut on said bolt to urge said clamping means against
said flange.
10. Apparatus as claimed in claim 9 wherein said suspension means
includes a portion through which said bolt extends in non-threaded
engagement.
11. Apparatus as claimed in claim 10 wherein said portion is
laterally open for the insertion of said bolt and is provided with
notches to receive said first nut and hold the same against
rotation.
12. Apparatus as claimed in claim 6 wherein said clamping means
comprises mirror-image elements rigidly interconnected and
cooperatively comprising a first portion defining a smooth
cylindrical bore and a second portion provided with a hole
perpendicular to said bore for pivotal connection of said second
leg, said second portion of the clamping means having a flat
bearing surface at about a forty-five degree angle to said bore for
bearing against said flange.
13. Loading bearing appparatus adapted for being mounted on a beam
having an upper flange, said apparatus comprising first and second
partly coextensive triangulated means, said first means including a
first leg, part of which constitutes a first leg of said second
means, said first means including a second leg pivotally connected
to the first leg thereof, said second means including second and
third legs pivoted together and to the first leg thereof,
adjustment means for pivotally connecting the first leg of the
first means and the second leg of said second means such that the
length of the first leg of the second means is adjustable, and a
load bearing member rigidly affixed to the first leg of the first
means.
14. Apparatus as claimed in claim 13 comprising suspension means
adapted to seat on said upper flange and to receive and hold the
second leg of said second means with a second leg of the second
means bearing endwise against the beam.
15. Apparatus as claimed in claim 14 comprising clamping means on
the second leg of the second means to cooperate with said
suspension means to clamp said flange therebetween.
16. Apparatus as claimed in claim 15 comprising limit means to
limit the maximum angle between the first and second legs of the
first means.
17. Apparatus as claimed in claim 10 comprising a washer between
said first nut and suspension means.
18. Apparatus as claimed in claim 17 wherein said washer includes
flanges straddling said suspension means.
Description
FIELD OF INVENTION
This invention relates to load supporting systems and to related
suspension arrangements and methods and components therefor, and
more particularly to systems and techniques for hanging interior
and fascia forms to support the weight of wet concrete until it
sets.
BACKGROUND
In the construction of bridges, highways and the like, systems of
parallel steel I-beams are used as bases to support concrete which
is molded thereon. This concrete is poured in wet form onto molds
or supports carried by and/or between such beams and, after the
concrete has set, these molds are removed.
The mounting of forms on steel beams for the aforenoted purpose
involves various problems. First of all, relatively large amounts
of concrete have to be supported so that the forms must be strong.
Secondly, the installation of such forms will generally take place
in the field at a location where sophisticated tools are not
available and where working conditions are not the best.
Additionally, installation may take place under all sorts of
weather conditions and in the face of all sorts of hazards and
inconveniences.
Despite the above problems, numerous approaches have been developed
for mounting concrete molds or forms on steel beams. Some of the
approaches relate to fascia forms involving the solution of
cantilever problems as shown, for example, in U.S. Pat. No.
2,855,654 (G. H. Stroben), Pat. No. 3,077,645 (H. B. Fleming), Pat.
No. 3,119,590 (G. J. Eriksson), Pat. No. 2,974,386 (R. A. Frost)
and Pat. No. 2,058,268 (O. M. Stanley). Further solutions to this
problem are shown in Bulletin No. 3, Richmond Hanging Devices,
Richmond Screw Anchor Co., New York; Fleming Brackets for Bridge
Overhangs, Fleming Devices Inc., Maine; U-Mac Adjustable Bridge
Overhang Jack, March 1964, U-Mac Manufacturing Co., California; and
Superior Catalog 800, 1966, Superior Concrete Accessories,
Illinois, as well as in other catalogs which have been filed with
the U.S. Patent Office concurrently herewith. Other of the
aforementioned approaches relate to the suspension or hanging of
molds or forms between spaced parallel beams as shown in the
aforementioned literature and patents and, for example, in U.S.
Pat. Nos. 2,985,946 and 2,985,947 (B. Hillberg).
Most of the above form arrangements are in commercial use and
perform more or less satisfactorily to achieve their purposes. They
do not, however, provide the best possibilities with respect to
ease of adjustment and with respect to safety and convenience in
use. Thus, for example, none of the known supporting or hanging
arrangements provide an effective adjustment from atop the
corresponding beams and none of the known arrangements provide a
truly facile technique for bringing load supporting members into
position on the associated beam or beams.
SUMMARY OF INVENTION
Generally, it is an object of the invention to provide improved
means and techniques for mounting load supporting members on beams
and the like.
More specifically, one object of the invention is to provide an
improved technique whereby, if desired, a form supporting
arrangement may be assembled as a unit which can be transported to
the supporting beam or beams and then installed thereon, this
enabling a general conformation to a template or other such plan at
a station removed from the installation site and a fine adjustment
following installation.
Another specific object of the invention is to provide improved
techniques for adjusting molds or forms as to level, attitude and
so forth, taking into account safety and convenience factors for
the installing personnel.
Yet another object of the invention is to provide supporting or
hanging arrangements which can be fabricated from simple components
which are relatively small and may therefore be made of relatively
exotic materials, e.g., plated, galvanized, without introducing
intolerable cost factors and which, in any event, are of relatively
low cost and are easily manufactured.
Still another object of the invention is to provide an extremely
versatile hanging system capable of adapting readily to the
different geometries of bridge and highway structures and the
like.
To achieve the above and other objects and advantages of the
invention, there is provided in accordance therewith a complete
system and technique for hanging the interior and fascia overhang
forms to support the weight of wet concrete until the concrete has
set or hardened whereafter the forms can be readily removed.
According to one aspect of the invention, there is provided a
construction apparatus to support a concrete mold between two beams
comprising a joist adapted to constitute at least part of a mold
support with spaced beam engaging means provided on the joist to
enable the joist to be supported on the beams and to be adjusted
relative to the beams or to a horizontal attitude from a position
atop the beams, the joist and engaging means being connected
together as a portable unit with the means being arranged to
accommodate the spacing of the beams at a location remote therefrom
whereby the unit can be subsequently transported to the beams and
the joist dropped into a position between the beams.
In further accordance with this aspect of the invention, the
aforesaid engaging means include further means to release the joist
from a position below the beams whereby after the concrete has set
in the mold the joist can be readily removed.
According to another feature of the invention, the beams include
upper and lower flanges connected by a web with the upper flanges
having facing edges and the engaging means including members
adapted to seat on respective of the upper flanges adjacent and
cupping around the facing edges thereof.
In further accordance with the invention, the aforesaid members
include sections provided with generally cylindrical and vertical
openings adjacent the edges, the engaging means comprising brackets
engaging the aforesaid joist, threaded bolts extending through the
aforesaid openings and threadably engaging the brackets and nuts or
other such members on the bolts resting atop the members for the
transfer of load to the latter.
In accordance with another feature of the invention, the aforesaid
brackets may be U-shaped brackets mounted in reversed attitudes on
the joist, the bolts enclosing the joist in the brackets, the
apparatus further comprising fastening means connecting the
brackets to the joist.
According to still another feature of the invention, wedge means
are optionally sandwiched between the joist and the aforenoted
upper flanges of the beams.
According to still another feature of the invention, heads may be
provided on the bolts below the brackets providing for detaching
the bolts and thereby the brackets and joist from the aforesaid
members in accordance with the release function referred to
hereinabove.
Still another feature of the invention relates to the inclusion by
the brackets of upper and lower legs provided with aligned openings
and nuts welded to respective of the legs in correspondence with
the openings therein, the aforesaid bolts extending through the
openings and nuts and threadably engaging the same.
In accordance with another aspect of the invention, there is
provided an improved suspension device. This improved suspension
device comprises a portion provided with a cylindrical opening with
legs extending therefrom, the cylindrical portion being of a
greater depth than the legs whereby the legs can rest on the upper
flange of a beam with the cylindrical portion overhanging the
same.
According to a further feature of the invention, the cylindrical
portion and legs may have coplanar upper surfaces and the legs may
be parallel or flared apart. Moreover, the legs may touch one
another adjacent the aforesaid cylindrical portion or may be spaced
adjacent this portion.
In accordance with still another aspect of the invention there is
provided concrete mold apparatus which comprises spaced beams
including upper flanges having facing edges and remote edges and
being of determinable width, a joist extending between the beams
and being below and in overlapping relationship with the upper
flanges, there being furthermore provided brackets on the joist in
correspondence with the facing edges. In accordance with this
aspect of the invention, there are moreover included rods
threadably and adjustably engaging the brackets and extending
upwardly therefrom past the edges of the beam, suspension clips
being provided on the flanges cupping around these edges, there
being furthermore provided means for supporting the bolts on the
clips with the upper extremities of the bolts exposed above the
clips for engagement above the flanges whereby the brackets and
joist can be adjusted from a position above the beams.
According to still a further feature of the invention, at least one
of the aforesaid clips is spaced from and is free of connection
with the corresponding remote edge whereby this clip is held in
position by connection with the joist.
According to this aspect of the invention, there is moreover
provided a cover atop the joist to support concrete for molding,
this cover including sheets provided with slots to straddle the
bolts, the sheets being sandwiched between wedge means and the
aforesaid upper flanges.
The rods of this aspect of the invention will extend below the
aforesaid brackets and joist and the apparatus will moreover
comprise means on these rods for engaging and rotating the latter
from below the beams to detach the joist and brackets from the
suspension clips.
In accordance with still another aspect of the invention there is
provided for supporting a concrete mold arrangement on a beam which
includes an upper flange, an apparatus comprising a mold supporting
member, means for suspending this member from and at least in part
below the upper flange and means to engage the first said means
above the flange to adjust the same and to adjust the horizontal
attitude of the mold supporting member. Moreover, the first said
means of this aspect of the invention may include an adjustable
threaded engagement means coupled to the said member below the
aforesaid flange for adjusting the position of this member and
means extending above the flange for adjustment of the engagement
means.
In further accordance with the invention there is provided a
method. This method comprises attaching to a concrete mold
supporting member a thread actuated adjustment for the adjustment
of said member, suspending the adjustment and member from the upper
flange of a beam by a threaded member such that the threaded member
extends above the beam but engages the adjustment below the said
flange and adjusting the threaded member from above the flange.
This method may further comprise preparing a plan establishing a
relationship between the supporting member and beam, connecting the
adjustment and threaded member to the said supporting member to
form a unit according to the aforesaid plan at a station remote
from the beam and transporting the unit to the said beam and
suspending the unit from this beam.
In accordance with still another aspect of the invention, there is
provided a tool for performing the aforesaid adjustments. This tool
will provide for rotating a rod at least one end portion of which
is cylindrical and threaded. The tool includes a head provided with
a blind and threaded cylindrical receptacle adapted to be threaded
to a homing position on the end portion of the rod which is
cylindrical and threaded. Moreover, there is provided a means to
apply a rotational force concentric with the cylindrical receptacle
to the aforesaid head.
In accordance with still another aspect of the invention, there is
provided an apparatus for supporting a load bearing member from a
beam having a web and an upper flange on the web, this apparatus
comprising first and second legs pivotally connected to each other,
there being furthermore provided suspension means suspending the
first said leg from the flange, pivot means connecting the second
leg to said load bearing member and adjustment means pivotally
connecting said first leg to said load bearing member at a position
spaced from said pivot means, the said adjustment means being
controllable through the said first leg to adjust the effective
length of the latter whereby to tilt the load bearing member.
In this latter aspect of the invention, there may be furthermore
comprised third and fourth legs pivotally connected together, the
third leg being fixed to the load bearing member, the first and
second legs being pivotally connected at spaced positions to this
third leg and thus to the load bearing member. The fourth leg in
this embodiment of the invention includes an end remote from the
third leg which is adapted to bear against the beam at a position
below and spaced from the upper flange.
Still further in this embodiment of the invention there may be
provided a clamping means on the first leg pivotally connecting the
second leg to the first leg and cooperating with the suspension
means to clamp the flange therebetween.
The fourth leg of the apparatus of this embodiment of the invention
may be of adjustable length and there may be provided a limit means
connected between the third and fourth legs to limit the angular
displacement therebetween.
Still further in accordance with this embodiment of the invention,
the first leg may be a threaded bolt and the adjustment means will
be in threaded engagement therewith, the bolt extending through and
above the suspension means whereby to be engageable above the beam
for adjustment of the adjustment means.
Still further, the load bearing member may include two planks and
the third leg may include two facing angles connected to the
planks, the adjustment means including a threaded element pivotally
connected between these angles.
According to other aspects of this embodiment of the invention, the
pivot means may include a pin extending between the aforesaid
angles and spaced straps connected between the pin and first leg.
Moreover, there may be comprised a first nut on the bolt for
transferring load from the bolt to the suspension means and a
second nut on the bolt to urge the clamping means against the
flange. Still further, the suspension means may include a portion
through which the bolt extends in non-threaded engagement.
Further features of this embodiment of the invention include that
the aforesaid portion is laterally open for the insertion of the
bolt and is provided with notches to receive the said first nut and
hold the same against rotation. Still further, the aforesaid
clamping means may comprise mirror image elements rigidly
interconnected and cooperatively comprising a first portion
defining a cylindrical bore and a second portion provided with a
hole perpendicular to this bore for pivotal connection of the said
second leg, the second portion of the clamping means having a flat
bearing surface at about a forty-five degree angle to the aforesaid
bore for bearing against the flange.
In accordance with still another aspect of the invention there is
provided a load bearing apparatus adapted for being mounted on a
beam having an upper flange, this apparatus comprising first and
second partly coextensive triangulated means, said first means
including a first leg part of which constitutes a first leg of the
second means, said first means including a second leg pivotally
connected to the first leg thereof, said second means including
second and third legs pivoted together and to a first leg thereof,
adjustment means for pivotally connecting the first leg of the
first means and the second leg of the second means such that the
length of the first leg of the second means is adjustable, there
being moreover provided a load bearing member rigidly affixed to
the first leg of the first means.
In this embodiment of the invention there is provided a suspension
means adapted to seat on the upper flange and to receive and hold
the second leg of the second means with the second leg of the
second means bearing endwise against the beam.
A clamping means is provided in accordance with this embodiment of
the invention on the second leg of the second means to cooperate
with the suspension means to clamp the flange therebetween.
Moreover, as noted hereinabove, with respect to another aspect of
the invention there may be provided a limit means to limit the
maximum angle between the first and second legs of the first
means.
The above objects and features of the invention, as well as
advantages thereof, will be described in detail hereinafter with
reference to the accompanying drawing.
BRIEF DESCRIPTION OF DRAWING
FIG. 1 is a partly cross-sectional view through a bridge or highway
construction illustrating spaced parallel beams with interior and
outboard concrete mold forms mounted thereupon in accordance with
one embodiment of the invention;
FIG. 2 illustrates a variation in the concrete mold form of FIG.
1;
FIG. 3 is another variation of the concrete mold form of FIG.
1;
FIG. 4 illustrates on enlarged scale some details with respect to
the mold support employed in the construction of FIG. 1;
FIG. 5 is a sectional view taken along line V--V of FIG. 4;
FIG. 6 is a top view of a suspension clip employed in the
suspension arrangement of FIG. 1;
FIG. 7 is a side view of the suspension clip of FIG. 6;
FIG. 8 illustrates a modification of the clip of FIG. 6;
FIG. 9 illustrates a further modification of the clip of FIG.
6;
FIG. 10 is a side view of a bracket employed in the construction
illustrated in FIG. 1;
FIG. 11 is a view from another side of the bracket illustrated in
FIG. 10;
FIG. 12 illustrates on enlarged scale the fascia overhang support
employed in the construction of FIG. 1;
FIG. 13 is a sectional view taken along line XIII--XIII of FIG.
12;
FIG. 14 is a sectional view taken along line XIV--XIV of FIG.
12;
FIG. 15 is an end view of the bottom portion of the bracket
illustrated in FIG. 12;
FIG. 16 illustrates a modification of the structure illustrated in
FIG. 15;
FIG. 17 illustrates on enlarged scale a component employed in the
construction of FIG. 12;
FIG. 18 is a side view of the component of FIG. 17;
FIG. 19 illustrates another component employed in the construction
of FIG. 12;
FIG. 20 is a side view of the component of FIG. 19;
FIG. 21 is a front view of another component employed in the
construction of FIG. 12;
FIG. 22 is a side view of the component of FIG. 21;
FIG. 23 is a top view of another component employed in the
construction of FIG. 12;
FIG. 24 is a side view of the component illustrated in FIG. 23;
FIG. 25 illustrates a modification of the construction of FIG.
12;
FIG. 26 is a top view of a suspension clip which may be used in
substitution for that illustrated in FIG. 12;
FIG. 27 is a side view of the suspension clip of FIG. 26;
FIG. 28 diagrammatically illustrates a form of tool which can be
employed for adjustment purposes in the aforesaid apparatus;
FIG. 29 illustrates a modification of the tool illustrated in FIG.
28;
FIG. 30 is a view corresponding to FIG. 14 showing a modification
thereof;
FIG. 31 is a side view of the threadably engaged components in FIG.
30 taken along line XXXI--XXXI of FIG. 30;
FIGS. 32 and 33 correspond to FIGS. 26 and 27 and show a
modification of the same;
FIGS. 34 and 35 are view of a further embodiment of the invention
constituting a variation embodiment illustrated in FIGS. 32 and 33;
and
FIG. 36 is a pictorial view illustrating a method of the invention
utilizing some of the above structural components.
DETAILED DESCRIPTION
A deck form is a structure for receiving wet concrete and
supporting the same on steel beams so that the concrete may set and
form an adjunct to the steel beam such as a concrete road or the
like. The details of a deck form are illustrated in FIG. 1.
In FIG. 1 are illustrated two spaced and parallel steel beams 10
and 12. Beam 10 includes an uppper flange 14, a lower flange 16 and
a web 18 connecting these flanges. Beam 12 includes an upper flange
20, a lower flange 22 and a connecting web 24.
Flanges 14 and 20 have facing edges 26 and 28 and remote edges 30
and 32, i.e., these edges are remote from one another in contrast
to facing edges 26 and 28.
An additional number of beams may be employed in the overall
construction, however, it is satisfactory for purposes of
explanation to deal simply with the two illustrated beams 10 and
12.
Generally indicated at 34 is the interior form which supports the
wet concrete at the interior of the overall construction, whereas
generally indicated at 36 is the fascia overhang which supports
that part of the wet concrete which is outboard of the outermost
beam 10.
The wet concrete is indicated at 38. It is supported on a number of
covers or sheets such as, for example, the sheets 40 and 42, as
well as on the upper surfaces of the flanges 14 and 20 and by other
minor components to be mentioned hereinafter.
The sheet 40 is supported between the beams 10 and 12 by means of a
joist 50. This joist is provided with wood slats or scabs 52 and 54
by means of which an upwardly directed extension or filler 56 is
supported atop the joist 50 for elevating the sheet 40 with respect
thereto. The joist 50 as well as extension 56 may be fabricated of
wood and the sheet 40, as well as other such sheets may be made of
plywood or the like. A further boundary to the mold is provided by
side sheets 58 and 60 connected to the ends of extension 56.
Connected to the joist 50 at the opposite ends thereof are brackets
60 and 62. These engage end portions 64 and 66 of joist 50, these
end portions extending respectively below upper flanges 14 and 20
and being thus in overlapping relationship with the same.
As will be described in greater detail hereinafter, threaded rods
or bolts 70 and 72 extend through the brackets 60 and 62 and extend
upwardly past facing edges 26 and 28 to a position above the
respective beams. Thereat they are engaged and supported by clips
or suspension elements 80 and 82, the details of which will be
described hereinafter.
To avoid leakage of the wet concrete as it is being poured, there
are in addition provided strips 84 and 86, these strips being
appropriately provided with slots so that they are capable of
straddling the bolts 70 and 72 and the strips 84 and 86 extend
below and in face to face contact with the bottom surfaces of upper
flanges 14 and 20. Between these strips and the upper edge of joist
50 there are provided wedges 88 and 90 which enable the strips to
be wedged tightly against the bottom surfaces of the upper flanges
of the beams after appropriate adjustment has been made of the
horizontal attitude of joist 50 and the constructional elements
mounted thereupon. Such adjustment is made through operation of the
threaded bolts 70 and 72 which have threaded engagement with the
aforenoted brackets, adjustment of the attitude of the sheet 40
being made in cooperation with the use of a level or in cooperation
with the use of surveyor's equipment according to well known
techniques.
From what has been described above, it will now be apparent that a
plurality of interior forms may be provided between a succession of
I-beams in the manner described to provide a concrete mold of
desired width. The outer extremity of the mold or fascia overhang
portion is provided at both lateral extremities of the mold in the
manner to be described next below.
The fascia overhang requires a cantilever structure and for this
purpose there is provided a wale 100 supported by a bracket
arrangement to be hereinafter described. Atop the wale 100 is shown
a plurality of wooden beams 102, 104, 106, 108 and 110, these
supporting the cover or sheet 42 atop which is mounted a further
beam or facing 112 held in position by a turnbuckle arrangement 114
or other such means. In this portion of the mold provision may be
made for a curb 116 which is formed according to conventional
concrete molding techniques which are well known and which are not
themselves a part of the present invention.
It will now be seen that a suspension device 120 is connected to
suspension device 80 by means of a transverse rod 122. Suspension
device 120 holds a threaded rod 124 which, as will be shown
hereinafter, forms one leg of a triangulated device generally
indicated at 126 for purposes to be noted hereinafter. Triangulated
device 126 cooperates with triangulated device 128 having a leg
generally indicatd at 130, an end of which bears against the lower
flange 116. These two triangulated devices 126 and 128 are
adjustable and interdependent and cooperatively control the
location or attitude of wale 100.
Shown in phantom lines in FIG. 1 is a second position for a lower
flange 16' as might be the situation if the beam 18 were of greater
height. In this latter event, the lower end of leg 130 does not
bear against the lower flange and is instead held in position by a
chain 132 which limits the angle which the leg 130 may assume
relative to the wale 100 in a constructional variation to be
described in greater detail hereinafter.
From what has been described above, it will be seen that the bolts
70 and 72, as well as the bolt 124 have exposed portions extending
upwardly above the mold form. By means thereof and due to the
details which will later be described, it is possible to control
the attitude of the joist 50 and the wale 100 from a position atop
the beams 10 and 12 as a result of which this adjustment can be
conveniently and safely made by personnel effecting the
installation. As will also be seen hereinafter, adjustment of the
wale 100 can be made without working on the outboard end of the
same or without the need for working below the upper flange of the
beam 10. As will also become apparent hereinafter, the aforesaid
bolts are provided with downwardly located heads 140, 142 and 144
by means of which these bolts can be subsequently removed from the
respective suspension devices so that after the concrete 38 has
set, it is possible to remove these bolts along with the
corresponding brackets and along with the joists and wales which
have been employed. This is absolutely essential from the point of
view of removing both materials which can deteriorate and brackets
and associated components which can be re-used on other projects or
on other portions of the same construction.
The concrete form illustrated in FIG. 1 is a typical haunch
construction. There is, however, illustrated in FIG. 2 a form in
which no haunch is employed. Herein appears an upper flange 160 of
a beam having associated therewith a cover or sheet 162, these two
elements having coplanar upper surfaces 164 and 166. Cover 162 is
supported on a beam or plank 168 supported on a wale 170, the wale
being held by a bracket including a threaded bolt 172 supported in
a suspension device 174 by means of a nut 176 through which the
load is transferred to suspension device 174. The bracket employed
herein is generally similar to that of FIG. 1 and will be described
in greater detail hereinafter. FIG. 3 shows still another
constructional variation involving a vertical haunch in which the
upper flange 190 of a beam has associated therewith a cover or
sheet 192 supported partly on a horizontal sheet 194 and partly
through the intermediary of a beam or plank 196 on a wale 198. A
suspension device 200 is employed with a bracket arrangement
indicated generally at 202, the details hereof to be described
below.
In FIGS. 4 and 5 are shown the beam 12 with upper flange 20 and
joist 50. Also illustrated are the suspension device 82 and bracket
62. Threaded rod 72 is seen to extend through the bracket 62 and to
form therewith an enclosure 210 in which the joist 50 is
accommodated. A nut 212 threadably engages the rod 72 at the upper
end thereof and constitutes the element through which load is
transferred to the suspension clip 82. The details of the
suspension clip will be described in detail hereinafter. However,
it is suitable to note at this point that the suspension clip cups
around the corresponding edge of upper flange 20 and thus may not
be displaced inwardly on this upper flange. It is also suitable to
note that the suspension clip 82 is localized at the edge of the
flange and does not extend to the remote edge of the flange nor is
it engaged with any element positioned at this remote edge. It will
also be seen that the bracket 62 is connected to the joist 50 by
means of fastening elements such as nails 214 and 216 which are
driven through appropriate holes provided in the bracket.
Similarly it will be noted that there is a nut 218 welded to the
bottom leg of the bracket 62, this nut being in threaded engagement
with the threaded bolt or rod 72 for purposes of adjustment of the
bracket.
Suspension device 82 is shown in greater detail and on enlarged
scale in FIGS. 6 and 7. Therein it can be seen that this device
includes a generally cylindrical portion 220 as well as legs 222
and 224. The legs and cylindrical portion are integrally fabricated
of steel or other suitable material having appropriate strength and
since it is of relatively small size can be made of a relatively
exotic material such as plated steel or a galvanized material which
will not greatly increase the cost of this device due to the
relatively small size thereof.
It is to be noted that the diameter of the cylindrical portion
indicated at x is much smaller than the extent y of the legs 222
and 224, the dimension y being equal to or greater than twice the
diameter x in the preferred version of this device. It will also be
noted that the height H1 of the legs is somewhat smaller than the
height or depth H2 of the cylindrical portion, this providing for a
recess 226 by means of which the suspension device can rest on top
of the flange while cupping around the edge of the same.
It will also be noted that the cylindrical portion 220 and legs 222
have a common coplanar upper surface indicated at 228.
The interior bore 230 of the cylindrical portion 220 is smooth
surfaced as indicated at 232. The reason for this is that in the
preferred embodiment of the invention no threaded engagement
between the cylindrical portion and the bolt passing therethrough
is desired.
In the embodiment of FIG. 6 the legs are shown as being spaced
apart by gap 234. This is not always essential since the clip can
take the form illustrated in FIGS. 8 and 9.
The suspension clip of FIG. 8 includes a cylindrical portion 240
and two legs 242 and 244. In profile, these components take the
form illustrated in FIG. 7. The legs 242 and 244 are, however,
parallel members and are preferably in face to face abutting
relationship.
The clip of FIG. 9 also includes a cylindrical portion 250 and legs
252 and 254. These legs are flared as indicated above with respect
to FIG. 6. However, these legs come into contacting relationship
with one another as indicated at 256.
Bracket 62 is shown in greater detail in FIGS. 10 and 11. In it is
seen that the bracket is a U-shaped bracket consisting of legs 260
and 262 connected by a connecting portion 264. Legs 260 and 262 are
provided with aligned holes or openings 266 and 268 through which
passes the threaded rod or bolt 72. A nut 274 is welded to leg 262
which is the bottom leg of the bracket, the nut having a threaded
bore which is coaxial with openings 266 and 268 and which makes
threaded engagement with rod 72. It thus results that the bracket
can be moved along the rod 72 by rotation of the latter in the
manner which has been implied hereinabove.
Connecting section 264 is provided with openings 276 and 278. The
purpose of these openings is to accommodate fastening members such
as the nails 214 and 216 referred to hereinabove with respect to
FIGS. 4 and 5.
As has also been indicated hereinabove, the rod 72 is provided with
a head 140, the purpose of which is to enable the detachment of
this rod from the suspension device 82 after the concrete has been
set whereupon the brackets, rods, joist and so forth may be removed
for future use. The head 140 may be constituted by a nut which is
welded to the rod 72.
The bracket may be fabricated, for example, from one-eighth inch
steel stock having suitable strength.
It will be seen from the above description that each bracket has a
closed side provided by connecting section 264 and an open side
indicated generally at 280. In a preferred embodiment of the
invention, the brackets are mounted in reversed attitude on the
wale 150 so that the closed sections 264 of the brackets are
positioned on opposite surfaces of the wale. This greatly aids in
avoiding a twisting moment with respect to the wale and is the
preferred technique to be followed in practicing the invention.
In further accordance with the method of the invention, it is to be
noted that the brackets are fastened at opposite extremities of the
joist with the threaded rods in engagement with the brackets. This
may be effected at a position remote from the steel beams which
represents a great convenience, the assembly of these elements and
the other components connected thereto constituting a portable unit
which can be fabricated and then transported to the beams and
dropped between the beams from a position above the same.
In practice the beams will be very frequently elevated from the
ground or above the surface of a body of water and working atop the
beams will be a hazardous function. It will thus be obvious that
the fact that the aforesaid portable unit can be fabricated at a
station remote from the beams represents a great advantage
contributing materially to the convenience and to the safety of the
overall operation.
Thus, it will also be seen that the unit of the invention provides
for a simple type of adjustment from the top of the respective
beams, this being enabled by the exposed upper end portions of the
threaded rods 70 and 72 with which a rotational type engagement can
be made in a manner to be explained hereinafter whereby the
brackets 60 and 62 can be displaced along the threaded rods to
adjust the level or horizontal attitude of the joist in cooperation
with the use of a level of surveyor's apparatus in accordance with
conventional and well known techniques.
It will also be appreciated that due to the provision of the heads
140 and 142 on the bottom of the aforesaid threaded rods, these
rods can be detached from the nuts holding the same on the
suspension devices 80 and 82 whereupon the unit can be completely
removed for further use for purposes of economy and the like.
Reference is next made to the fascia overhang structure illustrated
in FIG. 12, wherein appears beam 10 including upper flange 14,
lower flange 16 and connecting web 18. Herein are also seen the
triangulated bracket 126 cooperating with triangulated bracket 128
in a manner to be described next hereinafter.
In FIG. 12, different reference characters will be employed than
have been employed previously with respect to FIG. 1 because a
slightly varied embodiment of the invention is shown.
More particularly, triangulated bracket 126 includes legs 300 and
302 pivotally connected to a wale 304 and pivotally connected to
each other at pin 306, the leg 302 being pivotally connected to
wale 304 at pin 310 and leg 300 being pivotally connected to wale
304 at pin 308.
The triangulated bracket 128 includes a leg indicated at 312 and
another leg indicated at 314. The leg 314 is rigidly connected to
the wale 304. Legs 312 and 314 are pivotally connected at pin
316.
The leg 312 includes a free end portion 318 at the end of which is
mounted a cylindrical member 320 which is fixed in position on the
end portion 318 and which comes to bear against the web 18 and
against the lower flange 16 nestling in the corner defined between
the same. A strap 322 is mounted on the pin 310 in a manner which
will be described hereinafter and cooperatively serves a purpose
with the flange 324 which is provided with a hole 326.
The leg 312 includes two sections 330 and 332, there being provided
openings 334 through one of which is selectively inserted a pin 336
so that the effective length of leg 312 can be adjusted.
The leg 314 is rigidly affixed to the wale 304 as aforesaid by
means of fastening elements such as the nails 340 which are
inserted through holes provided in the leg 314 in appropriate
position as will be described in greater detail hereinafter.
The leg 330 of triangulated bracket 126 is a threaded rod at the
lower extremity of which is mounted a head in the form of a nut
which is welded to the threaded rod. The purpose of this head or
nut is to enable the detachment of the rod 300 from the associated
suspension device in the manner which has been indicated
hereinabove as a result of which the wale 304 and the associated
brackets can be recovered.
Suspension device 352 rests atop the upper surface of the upper
flange 14 and is connected by means of a rod 354 to a suspension
device performing a like function at the remote edge of the flange
14. A nut 356 threadably engages the upper extremity 358 of rod 300
and is the load transferring member by means of which the rod 300
is connected to the suspension device 352.
The exposure of the upper end portion 358 of the rod 300 provides
the means by which a rotational force can be applied to the rod 300
as a result of which an adjustment can be made in a manner to be
indicated in greater detail hereinafter.
FIG. 13 illustrates that the wale 304 is made in two parallel
sections 360 and 362, through which extends the pin 310 mentioned
hereinabove. The pin 310 is held in position by means of a head 364
and a nut 366, there being a central portion of the pin 310 on
which are mounted the spaced straps angularly disposed with respect
to one another and identified at 368 and 370, these two straps
constituting the leg 302 mentioned hereinabove with respect to
triangulated bracket 126. A pin 306 which has been identified
hereinabove passes through the upper extremities of straps 368 and
370 and functions to connect the leg 302 pivotally to the leg 300
as has been mentioned hereinabove.
As will be seen in FIG. 13, the leg 314 consists of two sections
372 and 374 which are angles to be described hereinafter. Strap 322
is mounted between straps 368 and 370 to perform a function to be
described hereinafter.
FIG. 14 also illustrates the sections 360 and 362 of the wale and
also appearing in this figure is the threaded rod 300. Herein it
will appear that the pin 308 illustrated in FIG. 12 consists of
sections 376 and 378 which are coextensive and coaxial. Section 376
is provided with head 380 whereas section 378 is provided with head
382. These sections are held in position in wale sections 360 and
362 due to the use of nuts 384 and 386.
The heads 380 and 382 hold in position the strap sections 388 and
390 between which is welded a helical coil 392. This helical coil
392 constitutes a section provided with an internally threaded bore
by means of which threaded engagement is made with the rod or leg
380 for purposes of threaded and adjustable engagement
therealong.
FIG. 15 illustrates the cylindrical portion 320 of FIG. 12 mounted
at the lower extremity 318 of leg 312 which consists as aforesaid
of sections 330 and 332. Also appearing herein is the flange 324 as
well as the bolt 336 by means of which selective connection is made
between the two leg sections for purposes of adjusting the length
of the leg.
As appears in FIG. 16, the bolt 336 may be replaced by a pin 400
having a head 402 and held in position by a cotter pin 404.
FIGS. 17 and 18 illustrate the details of the threaded receptacle
of FIG. 14, in greater detail. Herein appears the coil 392 welded
into position between straps 388 and 390. It can be seen that the
straps 388 and 390 consist of parallel portions 406 and 408
connected by shoulders 410 and 412 to parallel sections 414 and
416. In these latter sections are provided holes 418 and 420
through which extend pin sections 376 and 378 (FIG. 14), the latter
being held in position by heads 380 and 382.
The coil 392 may be formed, for example, as a three-fourths inch
diameter coil having seven and one-half turns approximately
three-sixteenths of an inch diameter wire stock. As aforesaid,
these turns cooperatively define an inner threaded receptacle which
makes threaded engagement with the rod 300.
As noted hereinabove, the leg 314 of FIG. 12 is made of two angles,
these appearing in greater detail in FIGS. 19 and 20. There it is
seen that the section 372, for example, is provided with a
plurality of holes 430 adapted to accommodate the fastening members
or nails which attach the angles to the wale and that there are in
addition provided holes 432, 434, 436 and 438. Hole 432
accommodates the passage of pin 316, whereas hole 434 accommodates
the passage of the sections of pin 308. Holes 436 and 438 are
selectively and alternatively employed to accommodate, for example,
the pin 310. The strap 322 of FIG. 12 is shown in greater detail in
FIGS. 21 and 22 wherein it is seen that this strap is of inverted
U-shape or horseshoe shape and is provided with openings 450 and
452 to accommodate the passage of a pin, the use of which will be
shown in greater detail hereinafter.
The strap employed and illustrated in FIGS. 21 and 22 can be made,
for example, of steel and may be of, for example, one-eighth inch
stock.
FIGS. 23 and 24 shown another important component of the invention
and in particular the component illustrated in FIG. 12 for engaging
the threaded rod 300 and for supporting pin 306.
In FIGS. 23 and 24 it is seen that the element 454 consists of two
mirror image sections 456 and 458 which cooperatively define a
smooth cylindrical bore 460 through which extends the rod 300.
The component 454 moreover comprises two flat portions 462 and 464
in face to face relationship and welded together as indicated by
welding points 466.
The element 454 has an upper surface 468, the purpose of which is
to permit bearing against the lower surface of upper flange 14 of
beam 10 or against an intervening sheet when this is desired. The
upper surface 468 of component 458 serves in cooperation with the
suspension device 352 having a parallel lower surfce for
sandwiching the upper flange 14 therebetween for a firm engagement
of the supporting device with the supporting flange.
As has been noted hereinabove with respect to the interior form the
fascia overhang form illustrated in FIGS. 12-24 can be set up at a
station remote from the beam and subsequently transferred or
transported to the beam whereat the rod 300 is passed through the
suspension device 352 and the nut 356 applied to hold the bracket
arrangement in position. The triangulated brackets 126 and 128 may
be set up according to a template or other form appropriately
prepared with respect to the beam and the constructional plans for
the project whereafter final adjustment may be made by engaging the
upper exposed portion 358 of the bolt 300 which is effective
through triangulated brackets 126 and 128 to tilt the wale 304 to
desired attitude.
With the lower end portion seating against the beam 10 through the
intermediary of cylindrical portion 320, a very firm support of the
wale is provided, while the adjustment of end portion 358 of
threaded rod 300 is effective to move the pin 308 along with
threaded receptacle 392 along rod 330 whereupon a tilting
adjustment of leg 314 is effected.
Before the adjustment operation is effected, however, it is to be
noted that the construction is moreover provided with nuts 470 and
472, of which the latter is a locking nut. The purpose of these
nuts is to bring the component 454 first loosely and finally snugly
into engagement with the undersurface of the upper flange 14 to
sandwich the flange between components 454 and 352.
With this adjustment made relative to components 454 rotational
engagement of threaded rod 300 as aforesaid will be effective
through the threaded receptacle 392 to effect a tilting of the wale
304 bringing the same into desired position in cooperation with the
use of a level or surveyor's equipment in accordance with
conventional techniques.
As has been indicated above, the lower flange 16 of the beam 10 may
be at a lower position due to a greater height of the web 18. In
this event, the circular portion 320 at the end of leg 312 may not
engage against the lower flange 16 as illustrated in FIG. 25. In
this event, a limiting device such as the chain 476 may be employed
or there may be employed any other flexible or non-flexible
limiting device connected between a pin 478 held by strap 322
mounted on pin 310 as aforesaid, the other end of the chain being
connected by means of a pin 480 to the flange 324 discussed
above.
By the use of this variation of construction a limitation is placed
on the angular relationship possible between legs 312 and 314, as a
result of which engagement of cylindrical element 320 against lower
flange 16 is no longer necessary.
The suspension device 352 is part of a hanger described heretofore
in connection with U.S. application Ser. No. 23,844, Boll et al.,
filed Mar. 30, 1970. In the suspension device shown in this area of
the structure in FIGS. 1 and 12, it is necessary to insert rod 300
through the bore provided in the suspension device. FIGS. 26 and 27
show an alternative embodiment of the invention in accordance with
which the threading of a rod through the suspension device in an
axial direction is not necessary.
In FIGS. 26 and 27 appear a suspension device 480 consisting of two
lateral elements 482 and 484 welded on a traversing rod 486 which
extends to the opposite edge of the flange involved. The sections
482 and 484 define a laternal opening 488 through which the rod 300
can be inserted without need for an axial displacement of the same.
The nut 356 engaging the end portion 358 of the rod is engaged in
slots 490 and 492 so that the nut 356 is held against rotation and
is prevented from sliding out of the grip of sections 482 and
484.
Suspension device 480 has a flat lower surface 494 which rests on
top of the upper flange 14, the bore or grip provided between
sections 482 and 484 being at approximately a 45 degree angle with
respect to bottom surface 494 as indicated by angle A.
To engage the upper exposed ends of the various rods for purposes
of effecting adjustment of the various brackets, there is provided
a special tool, one such tool being indicated by way of example in
FIG. 28 at 500. Herein it is seen that the tool comprises a head
502 having a threaded receptacle 504 of a limited depth provided by
end stop 506 of rod 508 which constitutes a handle for the tool,
the extremity of this handle being bent over at approximately right
angles as indicated at 510. It will be readily appreciated that the
exposed end extremities of the rods may be engaged in threaded
receptacle 504 to the extent limited by end stop 506, whereafter
the rotation of handle 508 will be transferred to the rod such as
for example the rod 300 in FIG. 12 which will be thereby
rotated.
A variation of the tool appears in FIG. 29, wherein is seen a head
512 provided with threaded receptacle 514 having a handle 516
wherein a T-shaped grip 518 is provided for purposes of enabling a
rotary or torque force to be imparted to the exposed portions of
the aforesaid rods.
From what has been stated above, it will now be clear that the
invention pertains to a complete system for hanging both interior
and fascia overhang forms to support the weight of wet concrete
until it hardens whereafter the forms can be readily removed.
As has been indicated above, due to the different geometries of
bridge decks and the like, a forming or hanging system has to be
extremely versatile. The system described hereinabove is extremely
versatile and in addition provides for a unique method of adjusting
the forms both with respect to the interior forms and the fascia
overhang forms. Such adjustment may take place directly from the
tops of the respective beams, there being independent hangers
employed on each of the sides of the interior beams and a special
hanger on the fascia beam used in conjunction with an adjustable
fascia bracket, all of the aforesaid adjustments being possible at
and atop of the respective beams.
The overhang bracket of the invention has been geometrically
designed so that one bolt controls all adjustments and applied
loads. The basic components of this bracket are one large and one
relatively small variable angle triangulated bracket connected to
opposte each other at 180.degree.. Adjustment is accomplished by
rotating a bolt, which is known as a king bolt, to change the
length of one leg in the small triangle forcing the large triangle
to rotate over the points of connections in the vertically inclined
constant length legs of both triangles thus changing the angles of
all legs of both triangles thereby creating a vertical movement up
or down in the horizontally inclined leg of the large triangle on a
constant ratio to the change in length of the variable length leg
of the small triangle.
The adjustable fascia bracket has the additional advantage of using
two horizontal wood members available at the job site thereby
minimizing fabrication and shipping costs.
Additionally, the adjustable fascia overhang bracket can be used so
that the diagonal member of the large triangle rests on the bottom
flange of the beam giving a safe and positive support. For
unusually deep beams the bracket is adaptable for being used as an
overhanging cantilever with the use of a chain to minimize the
angular displacement between the legs of the larger triangle.
Provision has been made according to a feature of the invention to
provide for sliding the bolt laterally into the suspension device
without having to thread the bolt through the hanger.
The interior system is designed to use approximately one-half the
lumber of conventional systems by eliminating in most cases the use
of longitudinal joists and using only one instead of double
transverse wales.
As has been indicated hereinabove, the entire assembly of wale or
joist, adjusting bolts and hanger clips can be preassembled on the
ground and merely dropped into position on the beams. Final
adjustment to grade is then made conventionally or by adjusting the
threaded bolt from the top with a special tool.
The hanger clips are specially made so that they cannot be
accidentally turned or put out of position by careless workmen.
Once dropped into position the assembly is rugged and stiff and
there can be no undesired lateral movement.
Furthermore, with this system the entire assembly hangs free for
easy adjustment at any time, whereas another advantage of the
system is that the hanger clips are light enough to be made of a
rust-free material such as stainless steel or plastic or they can
be economically plated or galvanized if required.
Referring next to FIGS. 30 and 31, these show a modification of the
structure discussed above with reference to FIG. 14. This
modification provides a local eccentric rather than concentric
distribution of forces in the vicinity of bolt 300 in order to
counteract and thereby neutralize other forces in the system.
In FIG. 30 are shown the wale sections 360 and 362 through which
extends a bolt 600 which passes through an eye 602 in a metallic
hairpin shaped member 604 which is sandwiched between angles 372
and 374 mounted on the bottom inside corners of sections 360 and
362.
A wire coil 606 is welded to the member 604 and constitutes a
threaded receptacle through which extends the threaded rod 300.
The adjustment permitted by this construction is the same
adjustment referred to hereinbefore with reference to FIG. 14. The
difference, however, is that a single bolt 600 is employed instead
of the two bolt sections described in the prior embodiment.
With respect to FIGS. 32 and 33, which show a modification of the
construction described above with reference to FIGS. 26 and 27, the
nut 256 which engages the threaded rod 300 is seated on a washer
620 accommodated on the upper surface 622 of modified suspension
bracket 624. Protrusions 626 and 628 at the upper extremities of
the suspension device prevent washer 620 from slipping out of
position and at the same time nut 356 is elevated to position
whereat this nut can be rotated for adjustment without encountering
interference with suspension device 624.
From the above it will be apparent that numerous variations are
possible within the scope of the invention without distinguishing
from the scope of the following claims.
For example, FIGS. 34 and 35 show a modification of the structure
discussed hereinabove with respect to FIGS. 32 and 33. Herein the
suspension device consists of sections 700 and 702 having upwardly
extending protrusions 704 and 706. Seated on the upper surfaces 708
and 710 of the aforesaid sections is a washer type member 712
having depending flanges 714 and 716 which bracket the suspension
sections 700 and 702.
In this embodiment of the invention the bracketing flanges serve to
resist the distorting effects of larger forces by preventing the
sections 700 and 702 from spreading apart.
In the foregoing description reference has been generally made to
steel I-beams employed in bridge and road constructions and the
like. It is to be understood, however, that the load suspending
members of the invention may equally as well be employed in
buildings and in connection with wooden supporting members as well
as structural members of other types. The general importance of the
application of the aforegoing structural devices will be apparent
from an examination of FIG. 36 wherein is exemplified a method of
the invention as well as applications thereof.
In FIG. 36 appear a plurality of beams 800, 802 and 804, these
three beams being exemplary of an arbitrary number of beams which
may be employed in any given structure. Between these beams are
defined a plurality of bays 806 and 808. Corresponding ends of the
aforenoted beams are shown supported on a beam support 810. This
beam support may be, for example, a natural geological support or
an artificial support which is manufactured for purposes of
supporting the beams.
At a station indicated generally at 812 an operator 814 is
fabricating units 816 which, as has been noted hereinabove,
consists of joints 818, brackets 820, suspension devices 822 and
threaded bolts. The brackets are mounted on the joists in
accordance with an arrangement indicated by a template 824.
These units are carried by operators 826 along the beams and are
dropped into position between these beams. The units thus
constitute individual portable units which are readily brought to
position and suspended between adjacent beams being held in
position between these beams due to the spacing of the brackets and
threaded bolts in correspondence with the beam spacing.
As is illustrated, only the bay 806 is being decked whereas bay 808
has not yet been treated. This is an important aspect of the
invention which was not heretofore possible inasmuch as in known
constructions an interdependence between bays was inherent. In the
present invention, however, this interdependence is completely
avoided since the suspension devices at least with respect to the
interior forms are independent of suspension devices associated
with other bays.
As further illustrated in FIG. 36, operators 826 are carrying
sheets of plywood 828 which are supported on the suspended joists,
thereby forming a decking upon which wet concrete can be deposited
for subsequent setting. As is known, the grading of this decking is
important and must be carefully controlled. This grading is
controlled with the use of a level or the like by means of rotating
the bolts passing through the back brackets mounted on the joists
whereby the brackets are compelled to descend or ascend on the
associated threaded bolt or rod. Such adjustment can be effected in
entirety from atop the associated beams by the use of any of the
aforementioned tools or their equivalents. The above-noted fascia
overhang arrangements can be used in association with the interior
form arrangements or independently thereof as desired.
* * * * *