U.S. patent number 3,868,797 [Application Number 05/428,754] was granted by the patent office on 1975-03-04 for cantilever deck structure.
This patent grant is currently assigned to Harco Products Inc.. Invention is credited to Harry Fox, Alex Hardy.
United States Patent |
3,868,797 |
Fox , et al. |
March 4, 1975 |
CANTILEVER DECK STRUCTURE
Abstract
A cantilever deck structure for free form swimming pools or
walls having an irregular contour is formed by attaching elongated
strips of polystyrene foam, rectangular in cross section, to the
upper side walls of the swimming pool so the strips follow the
periphery of the pool. The strips of polystyrene foam are made
flexible by attaching cloth tape to the vertical sides of the
strips. These strips are supported at spaced intervals around the
periphery of the pool by means of support brackets, with the top
surface of the polystyrene foam strips near the top walls. With
this arrangement, the top surface of the polystyrene foam strip
serves as the base surface of a form for the cantilever deck. A
strip of sheet-like fiber glass is mounted vertically and edgewise
against a vertical side of the polystyrene foam strip and this
fiber glass sheet extends upward above the top of the pool to at
least a distance equal to the depth of the pool. This strip of
fiber glass serves as the side wall of the form. Then cement is
poured over the polystyrene foam strips to the desired depth and
left to harden.
Inventors: |
Fox; Harry (Los Angeles,
CA), Hardy; Alex (Los Angeles, CA) |
Assignee: |
Harco Products Inc. (Los
Angeles, CA)
|
Family
ID: |
23700271 |
Appl.
No.: |
05/428,754 |
Filed: |
December 27, 1973 |
Current U.S.
Class: |
52/73;
52/169.7 |
Current CPC
Class: |
E04G
13/06 (20130101); E04H 4/141 (20130101); E04G
13/066 (20130101) |
Current International
Class: |
E04H
4/14 (20060101); E04G 13/06 (20060101); E04H
4/00 (20060101); E04G 13/00 (20060101); E04b
001/34 () |
Field of
Search: |
;52/73,169,396,403
;4/172,172.21,172.19 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Bell; J. Karl
Attorney, Agent or Firm: Rubinstein; Julius L.
Claims
Having described the invention, what I claim as new is:
1. A cantilever deck form for a wall structure whose upper end
follows an irregular curve, comprising a base portion and a wall
portion, said base portion comprising a strip of polystyrene foam
having a first surface adapted to lie against a generally
perpendicular surface of the upper portion of the wall structure
and a second generally horizontal surface constituting the base
surface of the form, a plurality of brackets adapted to be
connected to the wall structure, in spaced relation to each other
along the said irregular curve, each bracket comprising a depending
anchor portion adapted to abut and be secured to a surface of the
wall structure, a support surface for said strip of polystyrene
foam, and an upwardly projecting form supporting portion, said
strip of polystyrene foam mounted on the support surface of the
brackets and shaped so that when the strip of polystyrene foam is
mounted on the support surface of the brackets, the second
generally horizontal surface of the strip of polystyrene foam lies
at least close to the upper end of the wall structure, said wall
portion of the form comprising a thin sheetlike strip of fiber
glass mounted edgewise on the support surface of the brackets and
projecting upwardly above the upper end of the wall structure to at
least the thickness of the cantilever deck, said strip of fiber
glass supported both by the upwardly projecting form supporting
portion of the brackets, and by said support surface, said thin
strip of fiber glass sheet disposed generally perpendicular to the
said second generally horizontal surface of the strip of
polystyrene foam.
2. The cantilever deck form described in claim 1 wherein in
assembled relation said strip of polystyrene foam has opposed
generally vertical surfaces, and wherein flexible tape is secured
to said opposed generally vertical surfaces of the polystyrene
strip to increase its flexibility.
3. A cantilever deck form for a wall structure whose upper end
follows an irregular curve comprising a base portion and a wall
portion, said base portion comprising a strip of generally flexible
material having a first surface adapted to lie against a generally
perpendicular surface of the upper portion of the wall structure
and a second generally horizontal surface constituting the base
surface of the form, a plurality of brackets adapted to be
connected to the wall structure in spaced relationship to each
other along the said irregular curve, each bracket composed of
first and second elongated bars, each having opposed surfaces, said
first bar having an offset intermediate its ends defining a first
connecting portion and a closely spaced parallel form-supporting
portion, said second bar having an elongated anchor portion, a
second connecting portion in spaced parallel relationship to the
anchor portion, and a web portion serving as a support base
connected to the adjacent ends of the anchor portion and the second
connecting portion, the first and second connecting portions of
said first and second bars releasably connected together in
abutting relationship whereby in assembled relation the anchor
portion and the form supporting portion of the brackets are
vertical and are disposed in spaced parallel relationship to each
other, said anchor portion of said second bar having means thereon
for attachment to said wall structure, said strip of generally
flexible material mounted on the web portion of the brackets, the
second generally horizontal surface of said strip of flexible
material lying at least closely adjacent to the upper end of the
wall structure, said wall portion of the form comprising a thin
sheet-like strip of flexible material mounted edgewise on the
support base of the brackets and projecting upwardly above the
upper end of the wall structure to a distance at least equal to the
planned thickness of the cantilever deck and supported by the form
supporting portion of the first bar, said thin strip of sheet
resilient material disposed generally perpendicular to the second
generally horizontal surface of the strip of flexible material.
4. The cantilever deck described in claim 3 wherein the first
connecting portion of the first bar of the bracket is provided with
an elongated screw receiving slot at one end intermediate the sides
of the bar and extending in the direction of the bar, said second
connection portion of the second bar having a screw thereon sized
to extend through said screw receiving slot and a nut for
releasably and adjustably holding said first and second connecting
portions of said first bar and said second bar together.
5. A cantilever deck form for a wall structure whose upper end
follows an irregular curve comprising a base portion and a wall
portion, said base portion comprising a strip of polystyrene foam,
generally rectangular in cross section and having a cloth tape
secured to at least one surface thereon to increase its
flexibility, said strip of polystyrene foam disposed so one surface
is adapted to abut against a generally perpendicular surface of the
upper portion of the wall structure while a second generally
horizontal surface of the said strip serves as the base surface of
the cantilever deck form, a plurality of brackets adapted to be
connected to the wall structure in spaced relationship to each
other along the said irregular curve, each bracket composed of a
first and second elongated bar, said first bar having an offset
intermediate its end defining a first connecting portion and a form
supporting portion disposed in closely spaced parallel relationship
to the first connection portion, said second bar having an
elongated anchor portion and a generally parallel second connecting
portion, said elongated anchor portion and second connecting
portion connected together by a web portion at adjacent ends of the
anchor portion, and said second connecting portion, the connecting
portions of said first and second bars releasably connected
together in abutting relationship, whereby in assembled relation,
the anchor portions and the form supporting portions of the
brackets are vertical and are disposed in spaced parallel
relationship to each other with the web portion serving as a
support base for said strip of polystyrene foam, said anchor
portion having means thereon for attachment to said wall structure,
said strip of polystyrene foam mounted on the support base of the
brackets and dimensioned so the said second generally horizontal
surface of said polystyrene foam lies at least closely adjacent to
the upper end of the wall structure, said wall portion of the form
comprising a thin sheet-like strip of fiber glass mounted edgewise
on the support base of the brackets and projecting upwardly above
the upper end of the wall structure, to a distance at least equal
to the planned thickness of the cantilever deck, and supported by
the form supporting portion of the first bar and said support base,
said thin sheet-like strip of fiber glass disposed generally
perpendicular to the second generally horizontal surface of the
polystyrene foam strip.
6. The cantilever deck described in claim 5 wherein the first
connecting portion of the first bar is provided with an elongated
screw receiving slot at one end intermediate the sides of the bar
and extending in the direction of the bar, the second connecting
portion of the second bar having a screw thereon sized to extend
through said screw receiving slot, and a nut for releasably and
adjustably holding said first and second connecting portions of
said first and second bars together.
7. The cantilever deck form described in claim 6 wherein adjustable
means are provided for varying the inclination of the form
supporting portion of the brackets to accommodate variations in
thickness of the polystyrene foam strip, so that in assembled
relation the polystyrene foam strips can be tightly pressed against
the walls of the swimming pool.
8. The cantilever deck form described in claim 7 wherein said
adjustable means comprise the use of shims mounted above or below
the screw in its screw receiving slot to vary the inclination of
the said form supporting portion.
9. A method for constructing a cantilever deck for a wall structure
comprising the steps of securing a strip of polystyrene foam
rectangular in cross section and positioning the strip of
polystyrene foam so one of the surfaces of the strip abuts the
upper part of the wall structure, forming the strip of polystyrene
foam so its horizontal upper surface has a width equal to the
distance the cantilever deck will extend from the wall structure,
whereby said upper surface of the strip of polystyrene form serves
as the base of a form, supporting the strip of polystyrene foam at
spaced intervals along the periphery of the sides of the wall
structure, positioning and supporting a thin sheet-like strip of
fiber glass edgewise against the surface of the strip of
polystyrene foam opposite the surface abutting the wall structure,
choosing the thin sheet-like strip of fiber glass so it extends
above the wall structure a distance at least equal to the thickness
of the cantilever deck whereby said fiber glass strip serves as a
side of the form, pouring cement onto the horizontal surface of the
strip of the polystyrene foam until the cement has a desired
uniform thickness over the upper horizontal surface of the
polystyrene foam strip, and letting the cement harden.
10. The method for constructing a cantilever deck described in
claim 9 including the step of positioning a thin sheet-like strip
of material against the upper part of the wall structure between
the surface of the polystyrene foam abutting said upper part of the
wall, selecting the dimensions of said thin sheet-like strip of
material so a portion extends above the upper end of the wall
structure, whereby when the cement for the cantilever deck is
poured and hardens, said portion of the thin sheet-like strip of
material will be gripped by the cement and any separation between
the cantilever deck and the upper end of the wall structure will be
masked by said thin sheet-like strip of material.
11. A cantilever deck form for a wall structure comprising a base
portion and a wall portion, said base portion comprising a strip of
generally flexible material having a first surface adapted to lie
against a generally perpendicular surface of the upper portion of
the wall structure, and a second generally horizontal surface
constituting the base surface of the form, a plurality of brackets
adapted to be connected to the wall structure in spaced
relationship to each other along the periphery of the wall
structure, each bracket comprising a depending anchor portion
adapted to abut and to be secured to a surface of the wall
structure, a support surface for said strip of flexible material,
and an upwardly projecting form supporting portion projecting above
the upper end of the wall structure, said strip of generally
flexible material mounted on said support surface of the brackets,
the second generally horizontal surface of said flexible material
lying at least closely adjacent to the upper end of the wall
structure, said wall portion of the form comprising a thin
sheet-like strip of flexible material mounted edgewise on the
support surface of the brackets, and projecting upwardly above the
upper end of the wall structure to a distance at least equal to the
planned thickness of the cantilever deck and supported by the
support surface of the brackets, said thin strip of sheet resilient
material disposed generally perpendicular to the second generally
horizontal surface of the strip of flexible material.
12. The cantilever deck described in claim 3 wherein the first
connecting portion of the first bar of the bracket is provided with
a pivot screw hole intermediate the sides of the bars, said second
connecting portion of the second bar having a screw thereon sized
to extend through said pivot screw hole whereby said first bar is
rotatably and pivotally mounted on said screw, and a nut for
releasably and adjustably holding the first and second connecting
portions of the first bar and the second bar together, in a first
position wherein the said form supporting portion of the first bar
extends upwardly in spaced parallel relationship to the anchor
portion of the second bar, and wherein by loosening said nut said
first bar can be pivoted to a second position where the form
supporting portion extends downwardly in spaced parallel
relationship to the anchor portion of the second bar to provide
access to the partially hardened cement of the cantilever deck for
a finishing tool.
13. The cantilever deck described in claim 5 wherein the first
connecting portion of the first bar is provided with a pivot screw
hole intermediate the sides of the bar, the second connecting
portion of the second bar having a screw thereon sized to extend
through said pivot screw hole of the first connecting portion
whereby the first bar and the second bar are held together, and a
nut for releasably and adjustably holding the first and second
connecting portions of the first and second bar together in a first
position wherein the form supporting portion of the first bar
extends upwardly in spaced parallel relationship to the anchor
portion of the first bar and wherein by loosening said nut said
first bar can be pivoted to a second position where the form
supporting portion extends downwardly to provide access to the
partially hardened cement forming the cantilever deck.
Description
BACKGROUND
This invention realtes generally to a cantilever deck structure,
and more particularly to a method and appartus for constructing a
cantilever deck for swimming pools and the like.
The current trend in the design of swimming pools is for them to
have individual shapes specially contoured to fit the land in which
they are situated. This generally means that the swimming pools
have irregular shapes in order to take full advantage of the size
of the lot in which the pool is situated. In addition, modern
swimming pools are generally constructed with a cantilever or
over-hanging deck surrounding the periphery of the pool.
Heretofore, efforts have been made to construct cantilever decks
for irregularly-shaped pools and the like. However, the methods
previously used had serious disadvantages. For example, one method
of construction employed large prefabricated resilient rubber forms
which were connected together around the periphery of the pool.
However, this arrangement limited the number of shapes the pool
could have. In addition, these forms were expensive to make and
were heavy thus increasing labor costs. Furthermore, despite the
resilience of the forms they had to be carefully handled and stored
to prevent damage to them so they could be reused. In addition, the
pieces of the form, because of their irregular shape required
substantial storage area, thus further increasing their cost.
The above-described disadvantages with prior methods of forming a
cement cantilever deck suggests that there is a need for an easier
and less expensive method and apparatus for forming a cement
cantilever deck around swimming pools or other structures and to
provide such a method and apparatus comprises an important object
of this invention.
This and other objects of this invention will become more apparent
and better understood in the light of the accompanying drawing and
specification wherein:
FIG. 1 is a plan view of a free form swimming pool in the process
of having a cement cantilever deck formed around its periphery.
FIG. 2 is a sectional view taken on the line 2--2 of FIG. 1.
FIG. 3 is a sectional view taken on the line 3--3 of FIG. 2.
FIG. 4 is an elevational view of the form and part of a supporting
bracket, showing the finishing operation applied to the cement
decking while part of the bracket has been removed to provide
access to the decking.
FIG. 5 is an elevational view of a section of the cantilever deck
showing how a gap between the side wall of the pool and the
cantilever deck is masked.
FIG. 6 is an exploded perspective view of another embodiment of a
bracket used to support the forms for the cantilever deck.
FIG. 7 is a perspective view of a portion of the polystyrene foam
strip used as the base of the form for the cantilever deck.
FIG. 8 is a perspective view of a modification of the bracket shown
in FIG. 6.
FIG. 9 is an elevational view of another modification of the
bracket used with this invention.
Referring now to FIG. 1 of the drawing, an irregularly shaped or
free-form swimming pool indicated generally by the reference
numeral 10 is shown in plan view, after the cement bowl 12 of the
swimming pool has been formed and hardened and with the form for
the cantilever deck structure mounted around the periphery of the
pool and with the cement poured into the form.
The cantilever deck form indicated generally by the reference
numeral 14 comprises a base portion 16 and a wall portion 18. See
FIG. 2. The base portion 16 of the form is preferably formed from
strips of polystyrene foam mounted in an end to end abutting
relationship. Each strip is preferably rectangular in cross section
and includes a first surface 17 adapted to abut the surface of a
generally vertical wall 13 of the swimming pool and a second
surface 19 generally horizontal, and serving as the base surface of
the form 14. The surfaces 17 and 19 are planar in this embodiment,
however, circumstances may arise where these surfaces may be
non-planar, i.e., ribbed for added strength. Also, it is understood
that the strips of polystyrene foam 16 may, according to
circumstances, have cross sectional shapes which are not
rectangular.
Strips of cloth tape 20 are secured to the opposed sides 17 and 21
of each strip, see FIGS. 2 and 7. The tape has an important
function in that it permits the strips of polystyrene foam to bend
substantially in planes parallel to the tape without cracking or
breaking. In this way, the strips 16 can be bent to follow the
contour of very irregularly-shaped swimming pools. Moreover, after
the job is completed the strips of polystyrene foam 16 can be
straightened and used again for other jobs. Since the strips can be
straightened, it is clear that they can be stored in a compact and
economical manner when not in use.
As shown in FIG. 2, during construction, the strips of polystyrene
foam 16 are used to support the weight of the cement 22 which is
poured over it. After the cement hardens the form 14 including the
strips of polystyrene foam 16 are removed for reuse, as will become
more apparent below.
In order to hold the base portion 16 of the form 14 in position
around the periphery of the pool, a plurality of support brackets
are provided, see FIGS. 6, 8 and 9. Referring first to the bracket
26 shown in FIG. 6, each support bracket comprises first and second
iron bars 28 and 30. These bars are elongated and preferably have
opposed planar surfaces, although in some circumstances it might be
desirable for the opposed surfaces of the bars to be non-planar.
Bar 30 is provided with an offset 32 intermediate its end defining
a screw receiving connecting portion 34 and a form supporting
portion 36. Portions 34 and 36 are disposed in closely spaced
parallel relationship. The screw receiving connecting portion 34 is
provided with an elongated screw-receiving slot 38 open at the end
of the connecting portion 34 of the bar 30, and the slot 38 extends
in the direction of the length of the bar intermediate its sides,
see FIG. 6.
Bar 28 of the bracket is provided with an elongated anchor portion
40 and a screw holding connecting portion 42. Portions 40 and 42
are connected together by a web 44 connected to the adjacent end
portions of the portions 40 and 42. In this particular embodiment
web 44 is transverse to portions 40 and 42, but it is contemplated
that under some circumstances it might be desirable if the web
portion 44 were not transverse to portions 40 and 42.
The screw holding connecting portion 42 is provided with an
attached screw 46 which extends transverse to the surface 48 of the
connection portion 42, see FIG. 6. In assembled relation, as seen
in FIG. 2, bars 28 and 30 are connected together so screw 46 in
connecting portion 42 extends through the slot 38 in the connecting
portion 34 of bar 30. A nut 50 adapted to be fitted on the screw 46
adjustably and removably holds the bars 28 and 30 together for
reasons to be described below. As seen in FIG. 2, in assembled
relation, the web portion 44 serves to support the base portion 16
of the form 14 at spaced locations around the periphery of the
pool, while the connecting portions 42 and 34 of the bars 28 and 30
are in abutting relationship, see FIGS. 2 and 8.
The depending or anchor portion 40 is provided with holes for
receiving nails or screws 52 for securing the anchor portion 40 of
bar 28 to the sides of the pool, see FIGS. 2 and 3. After this is
done the polystyrene foam strips 16 are mounted on the web portion
44 and are secured to the wall 13 of the swimming pool by
additional nails or screws 52 at their abutting ends to prevent the
strips 16 from sagging at the ends. After bar 28 is secured to the
side walls 13 of the pool 10 as described above with the
polystyrene foam strips 16 on web 44, bar 30 is attached as
described above to complete the bracket, and when the nut 50 is
tightened, the polystyrene foam strip is pressed tightly against
the sides of the pool.
The wall portions 18 of the form are preferably formed from
sheet-like strips of fiber glass, see FIG. 3. This material is
useful because it is light, flexible and strong. In addition, after
use, the fiber glass strips 18, can be removed because they do not
stick to the cement and they will resume their original flat or
straight shape despite any bending necessary to make it conform to
the periphery of the swimming pool. Consequently, the fiber glass
strips along with the polystyrene foam strips can be reused, thus
decreasing waste and cost. The fiber glass strips 18 are mounted
edgewise on the web or support base 44 before the nut 50 is
tightened, see FIG. 2, and are supported by the form supporting
portion 36 of bar 30. As seen in FIGS. 2 and 3, the fiberglass
strips 18 project above the surface of the polystyrene strips 17 at
least a distance equal to the thickness of the cantilever deck.
It is noted that the design of the brackets 26 facilitate the use
of the edging tool 58 because of their construction. This is
because the bars 28 and 30 forming the brackets 26 can be separated
by merely loosening nut 50. Then, if bar 30 and strip 18 are
removed from the brackets before the cement has completely
hardened, an edging or finishing tool 58 can be applied to the edge
of the cement deck, see FIG. 4. It is noted that tape 20 lying on a
surface 21 of the strip 16 is bent over the top horizontal surface
19 to provide a solid guide for the edging tool 58. Furthermore,
the design of the brackets permit the use of shims 59 adapted to be
mounted above or below screw 46, depending on need. In this way the
form support portion 36 of bar 30 can be tilted toward or away from
wall 13 to accommodate variations in the thickness of the
polystyrene foam whereby the strips of polystyrene foam can be
pressed tightly against the wall 13 of the pool 10, despite
variations in their width.
It sometimes happens that after the cantilever deck has been
installed, the weight of the pool, particularly after it is filled
with water, or other factors, causes the walls 13 of the pool 10 to
subside somewhat, or causes the cantilever deck to lift, whereby
the top edge 15 of the wall 13 separates from the base 54 of the
cantilever deck leaving an unsightly crack. This unsightly crack
can be concealed by inserting a thin strip of plastic 56 between
the inner side of the polystyrene foam strip 16 and the wall 13, as
shown in FIGS. 2, 4 and 5. This thin strip of plastic follows the
contour of the pool and projects upward a little above the top edge
of the pool. Consequently, after the cement is poured and hardens,
the top part of the strip 56 becomes embedded in the cement. If
this strip of plastic is colored like the cement, then if there is
a small separation between the walls of the pool 10 and the
cantilever deck, the unsightly crack or groove 61 between the top
surface 15 of the walls of the pool and the bottom surface 54 of
the decking is masked by the plastic strip, see FIG. 5.
The modified bracket 60 shown in FIG. 8 is similar to the bracket
26 in that bar 28 is the same in both cases. However, bar 62
differs from bar 30 as shown in FIG. 6 in that the screw receiving
slot 38 shown in FIG. 6 is replaced by a pivot screw hole 64. In
all other respects the brackets are the same. In particular after
the anchor portion 40 of bar 28 is secured to the sides of the
pool, and after the polystyrene foam strip 16 is mounted on web 44
and secured to the sides of the pool, screw 46 extends through the
pivot screw hole 64 and the bar 62 is tightened against the
connecting portion 42 of bar 28 by means of nut 50 with the form
supporting portion 66 extending upwards to support the side wall of
the form, see FIG. 8. However, when access is desired to the
partially hardened cement, the nut 50 is loosened and bar 62 pivots
from the dotted line erect position shown in FIG. 8 to the solid
line downwardly extending position and the fiber glass strip 18 is
removed. In this position free access to the partially hardened
cement of the cantilever deck is possible so that the finishing
tool 58 can be applied to it without removing part of the brackets.
As stated above shims 59 may be mounted above or below screw 46
tilting the form supporting portion 66 of bar 62 toward or away
from the side walls of the pool to accommodate variations in the
size or width of the polystyrene foam strips.
Under some circumstances, however, it may be desirable to exert a
uniform horizontally directed force against the vertical sides of
the polystyrene foam. To do this the modified bracket 70 shown in
FIG. 9 may be considered. Bracket 70 is composed of bar 72 and an
adjustable bar 73. Bar 72 comprises an anchor portion 74, a
transverse web portion 76, and an upwardly extending screw
supporting portion 78. The screw supporting portion 78 is provided
with an integrally formed or rigidly attached nut or horizontally
threaded bolt receiving bore 80 extending therethrough. A bolt 82
is in threaded engagement with nut 80. One end of bolt 82 is
reduced in diameter and is cylindrical in shape to serve as a
bearing surface 84. This part of the bolt extends through bore 86
in bar 73. The extreme end 88 of bolt 82 is provided with a groove
for holding a retainer or snap washer 90. As seen, surface 92 of
bar 74 may be provided with a counter bore 94 so that the end 88 of
bolt 82 will not extend beyond the surface 92.
With this arrangement the rotation of bolt 82 in one direction or
the other pulls the bar 73 toward or away from the screw supporting
portion 78. In this way substantial variations in the width of the
polystyrene foam strips can be accommodated on the brackets because
bolt 82 can be rotated to cause the adjustable bar 73 to press
tightly against the sides of the polystyrene foam strip 16 and hold
it against the side wall 13 of the pool 10.
* * * * *