U.S. patent number 3,584,827 [Application Number 04/831,383] was granted by the patent office on 1971-06-15 for concrete wall form with waler clamp assembly.
This patent grant is currently assigned to Symons Corporation. Invention is credited to James C. Shoemaker.
United States Patent |
3,584,827 |
Shoemaker |
June 15, 1971 |
CONCRETE WALL FORM WITH WALER CLAMP ASSEMBLY
Abstract
A three-part inseparable waler clamp assembly for convenient
manual application to the meeting edges of a pair of steel-studded
concrete wall form panels to effect clamping of such panels
together, as well as to provide an anchor point for the adjacent
end of any tie rod which may be confined between such edges.
Inventors: |
Shoemaker; James C. (Hampshire,
IL) |
Assignee: |
Symons Corporation (Des
Plaines, IL)
|
Family
ID: |
25258929 |
Appl.
No.: |
04/831,383 |
Filed: |
June 9, 1969 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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808503 |
Mar 19, 1969 |
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Current U.S.
Class: |
249/45; 249/196;
249/219.2 |
Current CPC
Class: |
E04G
17/0721 (20130101); E04G 17/047 (20130101); E04G
11/12 (20130101); E04G 2017/0646 (20130101); E04G
2009/025 (20130101) |
Current International
Class: |
E04G
17/04 (20060101); E04G 11/12 (20060101); E04G
17/07 (20060101); E04G 11/00 (20060101); E04G
17/06 (20060101); E04g 011/06 () |
Field of
Search: |
;249/219W,192,196,215,2,41,44,45 ;25/131T,CM,CP |
Foreign Patent Documents
Primary Examiner: Overholser; J. Spencer
Assistant Examiner: Jones; Dewalden W.
Parent Case Text
This application is a continuation-in-part of my copending
application Ser. No. 808,503, filed on Mar. 19, 1969 and entitled
"SELF-CONTAINED WALER CLAMP ASSEMBLY FOR CONCRETE WALL FORM."
Claims
Having thus described the invention what I claim as new and desire
to secure by letter patent is:
1. In a concrete wall form, in combination, front and rear opposed
upstanding spaced apart sides each of which is comprised of a
series of individual upstanding panels disposed in edge-to-edge
relationship, each panel including a rectangular facing and a
rectangular marginal reinforcing frame including vertical side
members, each panel having one of the vertical side members of its
frame abutting a vertical side member of the frame of an adjacent
panel, there being a hole in each of the abutting side members at
substantially the same height in the wall form whereby the holes
are in registry, a waler board positioned horizontally against the
front side of the form and bearing against the outer edges of a
pair of the abutting vertical side members in bridging
relationship, and a waler clamp assembly for clamping the waler
board hard against said outer edges of said pair of abutting side
members, said waler clamp assembly comprising a U-shaped bracket
having upper and lower horizontal legs and a connecting bight
portion, the distal end of the upper leg being provided with a
reentrant hook which projects through the registering holes in said
pair of abutting side members, the distal end of the lower leg
effectively bearing against said outer edges of the last mentioned
vertical side members, there being aligned openings in said legs
near the base portions thereof, and a tapered wedge projecting
vertically through said aligned openings and bearing at its inner
side against the outer side of the waler board, said wedge exerting
a spreading action against the outer edge of the opening in said
upper leg and the outer side of the waler board.
2. In a concrete wall form, the combination set forth in claim 1
and including, additionally, a horizontal tie rod having one end
thereof secured to the rear side of the form, spanning the distance
between said form sides, and having its other end region projecting
outwardly of the form beyond the general plane of the facings of
the panels of the front side of the form, said other end region of
the tie rod having an opening therethrough in register with the
registering holes in said pair of abutting side members and through
which said reentrant hook projects.
3. In a concrete wall form, the combination set forth in claim 2
and wherein said other end of the tie rod is interposed between the
vertical side members of said pair of abutting side members.
4. In a concrete wall form, the combination set forth in claim 1
and wherein said reentrant hook is provided with an inclined cam
surface which bears against an edge of one of the registering holes
in said pair of abutting side members for drawing said side members
together under the influence of the spreading action of the
wedge.
5. In a concrete wall form, the combination set forth in claim 1
and including, additionally, a thrust plate slidable on the lower
leg of the U-shaped bracket, having its forward end overhanging the
distal edge of the latter and its rear end overhanging the forward
edge of the the opening in the lower leg, said thrust plate being
engageable with said wedge and being subject to the spreading
action of the latter.
6. In a concrete wall form, the combination set forth in claim 5
and wherein the forward edge of the thrust plate is formed with a
downturned bearing flange which abuts against the outer edges of
said pair of abutting side members.
7. In a concrete wall form installation, the combination set forth
in claim 1 and including, additionally, a second waler board
positioned horizontally against the front side of the form, bearing
against the outer edges of said pair of abutting side members in
bridging relationship and spaced beneath said first mentioned waler
board, said latter waler board effectively resting on the lower leg
of the bracket and being confined between said wedge and the outer
edges of said pair of abutting side members.
Description
The present invention, as well as that of the aforementioned
copending application, relates to a concrete wall form of the type
wherein the opposed and spaced apart sides of the form are each
constructed of a series of rectangular plywood panels in upstanding
and edge-to-edge relationship and are adapted to have wet concrete
into the space between them, the two form sides being connected
together by horizontally and transversely extending combined tie
rod and spreader devices so that they are properly held in place
and prevented from outward bulging or displacement under the
outward pressure of the wet poured concrete. As is the case in
connection with such copending application, the present invention
is concerned primarily with a waler clamp assembly by means of
which either a single board waler or a dual board waler may be
securely clamped against one side of the associated concrete wall
form in panel-bridging relationship for the purpose of aligning and
reinforcing the series of panels of the one form side.
Whereas, in my aforementioned copending application, the waler
clamp assembly is specifically designed for use in connection with
flat rectangular plywood panels, the waler clamp assembly of the
present invention is specifically designed for use in connection
with steel-studded plywood panels of the type which is commonly
known as a "Steel-Ply" panel. An example of a "Steel-Ply" panel, as
well as of a waler clamping bracket therefor, is shown and
described in U.S. Pat. No. 3,246,869, granted on Apr. 19, 1966 and
entitled "WALER CLAMP AND TIE ROD ASSEMBLY FOR A CONCRETE WALL
FORM."
The present invention is in the form of a modification of the waler
clamp assembly of my aforementioned copending application, the
modification enabling the assembly to be used not only as a tie rod
anchor but also as a panel-clamping device by means of which
adjacent panels are clamped together in their edge-to-edge abutting
relationship, thus eliminating the necessity of employing
conventional T-bolt and wedge fastening devices such as are
commonly employed in connection with "Steel-Ply" panels. Whereas,
in connection with my former waler clamping assembly, attachment of
the assembly to the wall form is, of necessity, made by attaching
the bracket to the projecting end of a tie rod which extends
outwardly beyond the confines of the wall form, the present waler
clamp assembly is capable of being attached to the abutting
portions of the steel studding of a pair of adjacent concrete wall
form panels for the purpose of clamping such portions together and
also holding a single or dual board waler in position against said
abutting portions of such studding, regardless of the presence or
absence of a tie rod in the vicinity of the region of application.
If a tie rod is used at such region, then the waler clamp assembly
will serve the additional function of anchoring the adjacent end of
such tie rod in position on the studding.
Except for the above-outlined extended use of the waler clamp
assembly of my copending application which adapts the same to
"Steel-Ply" panels, the general objects of the present invention
remain substantially the same as those expressed in my copending
application. Briefly, such objects are ease of application of the
waler clamping assembly to the associated concrete wall form in
waler clamping position, ease of removal of the assembly from the
form after the concrete has been poured and become hardened,
simplicity of construction, and the provision of a composite
three-piece assembly in which the parts are inseparable so that
loss or misplacement of any given part is impossible.
The invention consists in the several novel features which are
hereinafter set forth and are more particularly defined by the
claims at the conclusion hereof.
In the accompanying two sheets of drawings forming a part of this
specification, one illustrative embodiment of the invention is
shown.
In these drawings:
FIGS. 1 is a perspective view of the waler clamp assembly of the
present invention;
FIG. 2 is a side elevational view of a wedge which constitutes a
component of the assembly the wedge being shown in a detached
condition;
FIG. 3 is a side elevational view of another component of the
improved waler clamp assembly in its detached condition;
FIG. 4 is a fragmentary perspective view of a limited portion of a
concrete wall form, showing one of the improved waler clamp
assemblies poised preparatory to manual application thereof to the
wall form;
FIG. 5 is a fragmentary perspective view similar to FIG. 4 but
showing the waler clamp assembly in position on the form and in
waler supporting relationship;
FIG. 6 is a sectional view taken transversely and vertically
through the concrete wall form in the vicinity of one of the waler
clamp assemblies of the present invention, and showing the assembly
loosely positioned on the form prior to assembly of the waler
boards thereon;
FIG. 7 is a sectional view similar to FIG. 6 but showing the
bracket assembly operatively applied to the form with the wedge
driven to its home position; and
FIG. 8 is an enlarged horizontal sectional view on the line 8-8 of
FIG. 7.
Referring now to the drawings in detail, a three-piece inseparable
waler clamp assembly embodying the principles of the present
invention is shown in detail in FIGS. 1, 2 and 3 and is designated
in its entirety by the reference numeral 10. Such an assembly, the
details of which will be set forth subsequently, is designed for
use in securely holding one or more whaler boards in position
against the outer side of a rectilinear series of upright
steel-studded concrete wall form panels forming one side of a
concrete wall form, the panels being disposed in edge-to-edge
contiguity and each whaler board bridging a number of the panels
for alignment and reinforcing purposes as is customary in the art.
In FIGS. 4 to 7, inclusive, a fragmentary portion of a concrete
wall form 12 which is made up of a front side 14 and a rear side 16
is illustrated. As is well understood in the art, the two sides 14
and 16 are maintained in their spaced apart relationship by
combined tie rod and spreader devices in the form of flat tie rods.
But one tie rod is shown in the drawings and it is identified by
the reference numeral 18. Each side 14 and 16 of the concrete wall
form 10 comprises a series of rectangular steel-studded panels 20,
and the fragmentarily illustrated portion of the wall form
represents a fragment which is in the vicinity of the meeting edges
of a pair of adjacent or abutting panels.
The panels 20 are of the prefabricated type which is commonly
referred to as a "Steel-Ply" panel. Such a panel is manufactured
and sold by Symons Mfg. Company of Des Plaines, Illinois and
consists of a rectangular plywood facing 22 having a marginal
reinforcing frame which is formed of steel or other suitable metal
and is applied to the outer face of the facing. Each reinforcing
frame includes vertical marginal frame members 24 and horizontal
top and bottom frame members (not shown). Only the vertical frame
members 24 and the plywood facings 22 of the panels 20 are
illustrated in the drawings, the remaining portions of the panels
having no direct relationship to the waler clamp assembly 10. For a
full understanding of the nature of a "Steel-Ply" panel such as the
illustrated panel 20, reference may be had to aforesaid U.S. Pat.
No. 3,246,869. In this specification, the description of the panels
20 will be confined largely to the nature of the vertical frame
members 24 and the manner in which adjacent vertical frame members
are clamped together by the waler clamp assembly 10 of the present
invention.
Specifically, each vertical marginal frame member 24 is in the form
of a structural steel bar which is generally of shallow U-shape
cross section and comprises spaced marginal outwardly extending
parallel ribs 26 and 28 and a connecting base or web portion 30. On
each web portion 30 is a shallow, longitudinally and inwardly
extending rib 32 which defines a groove or recess 34 for reception
of the vertical edge region of the associated plywood panel facing
22. At vertically spaced regions along the vertical marginal
members 22, the ribs 26 and 28 are provided with horizontally
aligned notches 36 to accommodate the adjacent slotted ends of the
tie rods 18, while the web portions 30 of the vertical frame
members 24 are formed with horizontal rectangular slots 38 which
are in horizontal register with the notches 36 and are adapted to
receive therethrough the bolts of conventional connecting bolt and
wedge devices such as are shown at 40 in FIGS. 6 and 7 and by means
of which adjacent panels of the concrete wall form 12 may be
clamped together.
The tie rod 18 is of conventional design and may be of the type
which is shown and described in U.S. Pat. No. 2,948,045, granted on
Aug. 9, 1960 and entitled "TIE ROD FOR CONCRETE WALL FORMS AND CONE
THEREFOR." Briefly, such tie rod is in the form of a length of flat
metal stock and has in the end regions thereof slots 41 (see FIGS.
6 and 7) which are designed for registry with the slots 38 in the
web portions 30 of the vertical frame members 24 of the panels 20
on opposite sides of the concrete wall form 12. The notches 36 in
the ribs 28 of the vertical frame members 24 afford clearance
regions for projection of the end regions of the tie rod 18 between
adjacent webs 30 of contiguous panels so that the tie rod may
project laterally outwardly beyond the planes of the plywood
facings 22 on opposite sides of the form to bring the slots 41 into
register with the aligned slots 38 in the web portions 30 of the
vertical frame members 24, whereupon the ends of the tie rod may be
captured by the aforementioned bolt and wedge devices 40 when the
latter are installed in the slots 38.
The arrangement of parts thus far described is purely conventional
and no claim is made herein to any novelty associated therewith,
the novelty of the preset invention residing rather in the
construction of the hereinafter described waler clamp assembly and
the manner in which it is employed for the dual purpose of
maintaining a pair of waler boards such as the boards W1 and W2
against the vertical frame members 24, and also replacing one of
the connecting bolt and wedge devices 40 and maintaining a pair of
adjacent vertical frame members 24 in their abutting
relationship.
Referring now to FIGS. 1 to 3, inclusive, the present waler clamp
assembly 10 is in the form of a three-part unit including a
supporting bracket 50, a wedge 52 and a sliding thrust member or
plate 54. The bracket 50 of the assembly is generally of C-shape
configuration and includes an upper leg 56, a lower leg 58 and an
intermediate flat web or bight portion 60. One side margin of the
outer region of the upper leg 56 is formed with a laterally facing
relief area 62 which establishes a reentrant hook 64 at the outer
extremity of the upper leg 56, the hook being provided with an
inside cam surface or edge 65 (see FIG. 8), the function of which
will be made clear subsequently. Said upper leg of the bracket 50
is provided with a relatively large rectangular opening 66 near the
base thereof, and the lower leg 58 of the bracket is provided with
a similar but slightly larger rectangular opening 68. The two
openings 66 and 68 are in vertical alignment and are designed for
reception therethrough of the wedge 52.
The wedge 52 is formed of stamped plate metal and is U-shape in
transverse cross section, it being provided with flat sides 70 and
a flat connecting base 72. As clearly shown in FIG. 1, the wedge is
of tapered channel shape design and has its large end disposed
upwardly. The width of the opening 66 is slightly greater than the
width of the opening 68 and the length of the opening 66 is greater
than the length of the opening 68 by an extent substantially equal
to the thickness of the metal of the thrust plate 54 so as to
compensate for a portion of this plate which projects through the
opening 66 in a manner and for a purpose that will be subsequently
set forth. The lower outer corner regions of the two sides 70 of
the wedge 52 are formed with small coined ears 74 which may pass
freely through the opening 68 in the lower leg 58 of the bracket
proper but which are unable to pass through the opening 66 in the
upper leg 56. The overall transverse dimensions of the wedge 52 in
the upper regions thereof are greater than the corresponding
dimensions of the upper opening 66 so that the wedge is unable to
pass downwardly completely through this latter opening. By the same
token, the small coined ears 74 prevent the wedge from passing
upwardly completely through the opening 66 and thus the wedge is
effectively captured by the supporting bracket 50 and, hence,
cannot become disassociated from it. However, the coined ears 74
are so designed and positioned on the wedge 52 that when the wedge
is pulled upwardly to the fullest extent of which it is capable of
moving, it may be caused to rest in the inclined position in which
it is shown in FIG. 4, the wedge thus serving as a lifter or
manipulator, much in the manner in which a circular iron stove lid
is supported from its lifting handle. As shown in FIG. 2, the rear
inclined edges of the two sides 70 of the wedge 52 are formed with
vertical or noninclined sections which are designated by the
bracket 76 in this figure. These noninclined sections of the edges,
in effect, render the wedge uniform in thickness in a fore and aft
direction and serve a function that will be made clear
subsequently.
The thrust plate 54 of the assembly 10 constitutes, in effect, an
extension of the lower leg 58 and is in the form of a length of
flat plate metal stock and embodies a horizontal thrust leg 78, the
rear end of which is formed with a reverse bend 80 which provides a
reentrant section 82. The reverse bend 80 passes through the
opening 68 in the lower leg 58 of the supporting bracket 50 of the
waler clamp assembly 10 and as a result, the horizontal thrust leg
54 rests upon such lower leg while the reentrant section 82
underlies this leg in close proximity thereto. The medial region of
the thrust leg 54 is provided with a downwardly punched circular
depression 84 which forces the metal of the leg downwardly to
provide a depending protuberance 86. This protuberance projects
into an elongated longitudinally extending slot 88 (see FIG. 1)
which is formed in the medial region of the lower leg 58, thus
providing an interlock which limits the extent of fore and aft
sliding movement of which the thrust plate is capable, the
interlock and reverse bend 80 also serving to maintain approximate
alignment of the thrust leg 54 with the underlying reentrant
section 82. The forward end region of the thrust plate 54 is formed
with a downturned bearing flange 90 which is adapted to bear
against the adjacent vertical frame members 24 of the contiguous
panels 20 in bridging relationship when the waler clamp assembly 10
is installed thereon as will be described presently.
In the installation of one of the above-described waler clamp
assemblies 10 in a concrete wall form which is made up of
"Steel-Ply" panels such as the panels 20, after a given pair of
adjacent panels 20 has been set up in their edge-to-edge
relationship as shown in FIG. 4, the operator will raise the wedge
52 from the position in which it is shown in FIG. 1 until the two
small coined ears 74 engage the portions of the upper leg 56 that
define the sides of the rectangular opening 66, after which he will
incline the wedge until it assumes the position in which it is
shown in FIG. 4, so that by supporting the wedge with one hand, the
supporting bracket 50 of the assembly 10 may be guided in a
horizontal plane to position the hook 64 so that it registers
horizontally with one pair of horizontally aligned slots 38 in the
web portions 30 of the two adjacent contiguous vertical frame
members 20. Thereafter, by moving the assembly to the left as
viewed in FIG. 4, the hook will enter the two aligned slots 38, as
well as the slot 41 in the adjacent end region of any tie rod 18
which may be interposed between the two frame members 20 as
previously described. The presence or absence of a tie rod end
region between the two frame members 20 is immaterial to the use of
the present waler clamp assembly 10. If a tie rod is not present,
the hook portion 64 of the supporting bracket 50 of the assembly
110 will interlock with the opposed slots 38 in the web portions of
the frame members 24. If a tie rod is present, it will also
interlock with the latter, thus obviating the need for using one of
the bolt and wedge devices 40 at the particular location where the
waler clamp assembly is installed.
After the hook 64 has been passed through the three slots 38, 38,
41, the operator may release his grip on the wedge 52, thus leaving
the entire assembly 10 in the position in which it is illustrated
in FIG. 6. At this time, the weight of the waler clamp assembly 10
will cause the hook 64 to engage the end edges of the slots 38
while the downturned bearing flange 90 will bear against the outer
edges of the adjacent vertical frame members 24 in bridging
relationship and force the sliding thrust member 54 rearwards with
respect to the supporting bracket 50 until the depending
protuberance 86 engages the rear end of the slot 88 in the lower
leg 58 of the supporting bracket 50. The outer end of the slot 88
will thus constitute, in effect, an inwardly facing reaction
shoulder which assimilates the outward thrust that is exerted by
the hook 64 when the assembly 10 is "hung," so to speak, from the
two adjacent vertical frame members 24.
After "hanging" the waler clamp assembly 10 on the frame members 24
as previously described, a single waler board such as that that is
identified by the reference character W1 in FIGS. 5 and 6, is
caused to rest in the cradlelike space which is established for it
between the inclined wedge 52 and the adjacent edges of the
vertical frame members 24 as shown in FIGS. 5, 6 and 7. If two
waler boards are to be used in connection with the form, a waler
board such as that that is identified by the reference character W2
as shown in FIGS. 5, 6 and 7 and is caused to rest upon the upper
surface of the thrust plate 54. As soon as the single board waler
or the dual board waler installation is made, the operator will
push the upper end of the inclined wedge 52 forwardly toward the
concrete wall form 12 and, at the same time, force the wedge
downwardly so that the extreme lower end of the wedge will move
behind the reverse bend 80 of the thrust plate 54 and force the
latter bodily forwardly as the lower end of the wedge enters the
rectangular opening 68. Thereafter, the operator with the blow of
an impact tool such as a hammer will drive the wedge 52 to its home
position wherein it is shown in FIGS. 5 and 7. In such position of
the wedge, the thrust plate 54 remains under compression with the
downturned bearing flange 90 bearing against the outer edge of the
adjacent vertical frame members 24 in bridging relationship with
respect thereto. At the same time, the flat connecting base 72 of
the wedge 52 will bear hard against the forward face of the upper
waler board W1 and force the latter against the two vertical frame
members 24. If a second waler board W2 is used, the wedging action
of the wedge 52 will likewise force this latter board against the
two vertical frame members.
Removal of the waler clamp assembly 10 from the concrete wall form
12 is effected by a reversal of the procedure outlined above, the
wedge being initially loosened by an upward blow of the impact
tool.
Referring now specifically to FIG. 8, the clamping action which is
exerted upon adjacent or contiguous panels 20 in order to force the
adjacent contiguous frame members 24 against each other is attained
by the provision of the previously mentioned inclined cam surface
or edge 65. This edge 65 is provided in the distal region of the
hook 64 and when the hook 64 is projected through the two
horizontally registering slots 38 in the web portions 30 of the
contiguous frame members 24, one of these web portions bears
against an edge of the upper leg 56 of the bracket 50 while the end
of the slot 38 in the other web portion bears against the inclined
edge 65. Thus, when the wedge 52 is driven to its home position by
an impact blow as previously described, the single or dual board
waler serves as a reaction member so as to apply tension to the
upper leg 56 of the supporting bracket 50 and exert an outward
pulling action on the hook 64 as indicated by the arrow in FIG. 8,
thereby drawing the two web portions 30 toward each other, and
consequently, forcing the two panels 20 in their entirety, hard
against each other. If the tie rod 18 is interposed between the two
vertical frame members 24 as shown in this view, the hook 64 passes
through the slot 41 in the adjacent end of the tie rod so that when
the concrete is poured between the two form sides 14 and 16 and
against the panels 20 thereof, the spreading action of the concrete
on the two sides of the form will place the tie rod under tension
and the hook 64 will serve as the reaction member to assimilate
this tension.
The sections of the wedge 52 which are designated by the bracket 76
and render the wedge of uniform thickness in a limited section
thereof is provided for the purpose of preventing binding of the
wedge against the lower waler board W2 in the event that
manufacturing tolerances are exceeded so that such lower board is
appreciably wider than the upper board W1. In the absence of the
aforementioned sections of the wedge 52, there would be a tendency
for the wedge to bind against the lower waler board W2 at the
expense of full pressure being applied to the upper waler board
W1.
The invention is not to be limited to the precise arrangement of
parts shown in the accompanying drawings or described in this
specification as various changes in the details of construction may
be resorted to without departing from the spirit or scope of the
invention. For example, although the present waler clamp assembly
is shown as being applied to a concrete wall form employing
"Steel-Ply" panels 20 which are held in place by flat tie rods of
the type shown in aforementioned U.S. Pat. No. 2,948,045, it is
obvious that the waler clamp assembly is useable with equal
facility and without modification in association with a concrete
wall form which employs conventional rod-type tie rods having
looped ends instead of slotted ends. It is also within the purview
of the present invention to dispense with the thrust plate 54 and
form the bearing flange 90 directly on the distal end of the lower
leg 58 and the supporting bracket 50. In either event, whether the
thrust plate 54 be omitted or employed, the lower leg 58 of the
bracket 50 may be said to bear effectively against the two
contiguous vertical frame members 24 of the panels 20.
* * * * *