CA1235311A - Corner forming apparatus for a concrete wall form - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE
In the corner forming apparatus of the present invention, an inside corner forming member is provided, for use with a pair of panels to form the inside corner in a concrete wall form. The corner forming member is securable to a panel-support beam member, and is substan-tially L-shaped. A seating flange projects from the inner surface of one leg of the L-shaped member at an intermediate location therealong, this seating flange being substantiallly parallel to the other leg of the member. That portion of the leg which extends beyond the seating flange is substantially equal to the thickness of one of the pair of panels and is adapted to shield an edge of that panel when said panel is seated on the seating flange. The other leg of the L-shaped member is securable to the panel-support beam member, and is provided with at least one aperture therein to receive fastening element for securing the other of the pair of panels to the other leg such that a surface of the other panel and the outer surface of said one leg are substantially coplanar.
Also a unique outside corner waler useful with the inside corner forming member in quick end accurate assembly of complete corner wall form. Said waler having a major leg and a minor leg each joined at one end at right angles by an aper-tured web and being of respectively different heights such that said waler seats at about a 45° angle.

Description

( 1243~7 lZ353~1 BACKGROUND OF THE INVENTION
.

This invention relates to on assembly for use with concrete wall form end, more particularly, to on inside corner forming member alone or in cumblna~ion with such assembly and/or outside corner walers.
In encrypt wall construction, the wall form typic gaily it assembled at a job size. Even today these forms are often custom-built from wooden Todd sheathed with ply-wood for one-time use. Advantageously, on larger construction sites, reusable mobile wall furs are used, typically ganged 0 together and shifted as the height and length of the concrete wall it formed, Various structure are used as backing support to the plywood panels Jo as to resist the forces exerted on those : wall form panels during the formation of the concrete walls, As one example of such support structures, wooden tugs are secured to top panel and then load-gathering horizontal wales are secured to the vertical us with the latter occasionally bucked by vertical strong back thereby providing a rigid upper for the panel. In a more modern application, the JO panels are backed by horizontal orates, or beams, which in turn - are recur d by vertical steel double-channel wales. Recently, these gyrate and wales have been formed of aluminum, resulting in light weight, easily handled, strong, and rigid components, relatively easy to ma~ufscture, and readily reusable.
I There structure are described it various edition ox For work for Concrete by urn published by the -- -- .,. _ American Concrete Institute wince 1963 (e.g. Lee Figures 4-11, 6-2, 9-34, 9-35, end 11-1? ox the Ed Elton I

to -I

n exLIml~lc of` on silo concrete mold; collstrucce(l ox such wall forms is descr:ihe(l in IJIlitcd Slates l'.ltellt No.
4,14~,690. [oven today custolll-built wood corollaries romLIill the standard constructiorl technical. 'Issue is true in swept of numerous suggested improvements over the years. See for exam to, lJnited States Patellt Nos. 4,144,690 issued March 20, 1979 to Peter J. Avery; 1,051,329 issued January 21, 1913 to GEL.
I-libbard; 2,313,880 issued March 16, l9~l3 to OR Ligate, So.;

2,789,337 issued March 23, 1957 to A. Aeration and George A.
van Sickle; and 2,826~801 issued March 18, 1958 to JOE. Monet, Vernon R. Chummily and John G. Simmons.
In another problem with the prior art, the edge of the plywood panel used to form the inside corner is not protected.
This means that the edge often becomes chipped or split when that panel is shifted to other locations or is otherwise manipu-fated. This can affect the integrity of the mold causing leaks, the quality of the finished concrete as well as the life of the panels; thus adding to the expense of construction.
ASSUAGE many inside corner forming members generally are secured only to the panels which are used therewith. Without additional rigid support, the inside corner assembly may be undesirably weak.
Therefore, the present invention is directed to providing corner forming apparatus which avoid the affronted disadvantages.
This invention is also directed to provide an improved inside corner concrete form assembly which is relatively inexpen-size to manufacture exhibits desirable rigidity, and can be easily and quickly reused at other locations on a job site.
The invention is further directed to provide an inside corner forming member which can be rigidly secured I

to a particular panel and then used with that panel in conjunction with another panel, to form either an inside corner or, when a corner is not needed may be used merely as an extent soon in a wall form (without the need to remove the inside forming member).
This invention also is directed to provide protection of the forming edge of the inside panel from damage which may be caused during transport, assembly, disassembly, and other hand-lingo to insure a good architectural finish.
As well, the invention is directed to provide an inside corner forming member which is used with conventional fastening hardware such that it can be easily and quickly assembled when originally setting up the wall form.
Summary of the Invention According to a broad aspect of the invention there is provided an outside corner waler for a concrete wall form comprising a U-shaped channel having a pair of parallel major and minor legs joined at right angles by an aperture top web, said legs terminating at their free ends in flanges coplanar with each other, said legs being dimensioned with relative lengths such that said web makes about a 45 angle with the plane of said flanges.
BRIEF DESCRIPTION OF THE DRAWINGS
The following detailed description, given by way of example, will best be understood in conjunction with the accom-paying drawings in which:
FIGURE 1 is an isometric view of the inside corner forming member in accordance with the present invention;

aye FIGURE 2 is an isometric view of the use of this inside corner forming member attached to the plywood panel arid joist of one wall form and joined at right angles to a I L

second Hall Norm;
1 [GURU 3 is a Alan view old tic Camille Shelley shown ion FIGURE. 2;
INURE 4 is an isometric vice of:` the combination of the inside corner forming member and unique outside comer form-in assembly for use in forming a poured concrete corner wall;
FIGURE 5 is a plan vow of an outside corner waler and tie row assembly mounted on a wall form joist;
FIGURE 6 located on the second sheet of the drawings 10 is a top view of the inside corner forming member used in another alignment to demonstrate the flexibility thereof for linear in lieu of corner orientation; and FIGURE 7 is a plan view of a lowlier web and a tie rod and nut.
DETAILED DESCRIPTION Old A PREFERRED E~IBODI~IE.~IT
.. . . . .
Referring now to the drawings FIGURES 1-3 illustrate the inside corner forming member 10 as being substantially L-shaped with a pair of legs 22 and 24. In one embodiment the inside corner forming member is constructed of extruded aluminum 20 and the respective legs are of unitary construction therewith.
A seating flange 18 projects from inner surface 20 of leg 22 in a direction substantially parallel to leg 24. Seating flange 18 is disposed at an intermediate location along leg 22 such that an extension 26 of this leg is formed. As best seen in Figure 3 the inner surface of extension 26 and the seating flange 18 form an act e angle of slightly less than 90 with respect to each oilier .
Leg 24 is substantially Z-shaped and includes a first portion 32) which extends at a substantially right angle from its 30 intersection with leg 22. This first portion 32 ends in an angle portion 34 which angles Bali in the direction of the seat- -in flange 18. Angle portion 34 ends in a second portion 36 ~;35~3:~

h i C 11 I s s U lo s L I if t I .1 I 1 I) 11 L' I I I 1,` l t o I i l I L 1) 0 L' t i o I I LO `;
succor oration 36 18 teen to be oft from the unquote defined by eye 22 and 24 by Ryan of nil purloin 34, This second portiorl 36 of leg 24 surmount in a flown 38 used to secure the Shaped inside corner forming member 10 to panel-~upport beam member 16), Leg 24, and partlcul~rly first portion I whereof, it provided with a plurals of apertures 30 which extend along longitu-dial axis and which are spaced from each other by generally ~tsndard d~s~cances, Lee JIG. 1 there can be circular holes or preferably are rectangular wedge bolt slots).
then assembled Jo form an inside corner, L-Rhaped meDiber 10 it secured, or fastened to a pair of panel& 12 and 14. Typically, these panels are made up of one or more sheet OIL plywood. Thus, two horizontally oriented I I 8' sheet of plywood 12 would be attuned to flange 18 of an 8 foot L-shaped member 10.
FIGS. 2 and 3 illustrate the assPribly of Lopped member 10 with panels 12 end 14 to form an inside corner.
A end portion Of the inside surface of panel 12 Yeats upon seating flange 18, and the edge 28 of panel 12 Yeats against extension 26. Generally, edge 28 I at right angles with the inner surface of panel 12. However, in FIX:. 3, the ill-wide surface of extension 26 it not at fight angles with sousing flange 18, This acute ankle defined by the seating flange and extension eeriest to assure clove fit with the outer portion of edge 28 (to protect the latter and accommo-date any already existing it or distortions). Panel 12 us fastened to sealing flange 18 by means of bullock 56 which pass through viable openings on the panel, and alp rug holes 54 in the seating flange (the foregoing heroin! identified as a second fastening mean). Nikko 58 serve to t~gh~cen and suitably secure 7_ the bolt, whereby panel 12 it rigidly Sunday to one leg 22 ox L-shaped member 10, Typically, end as mentioned above, plywood panels 12 end 14 when used in modern Hall ohms are supported by aluminum oust 16, and waler (not shown). The typical sty 16 has a web I interconnecting a top hat channel 62 end a base flange 6B. In will forms, such ousts 16 extend generally horizontally. As best shown in FIGS. 4 end it, flange 68 has a bolt slot channel 70 adapted to receive the head of a bolt 50. This bolt 50 serves to secure a fastening clip 46. The position of clip 46 along the length of oiliest 16 is readily adjustable merely by sliding bolt 50 in channel 70.
As teen in FIG, 3, clip 46 has a hook 48 for grasping ; a flange, such as 38 provided on Z-shaped leg 24. Thus, the third fastening means may comprise one or all of the fastening clip 46, hook 48, and flange 38, which cooperatively secure leg 24 to joist 16. This ~olfit 16 18 secured to panel 12 by nails 63 (see FIG. I The Noel 63 asp driven unto a two by three inch wooden nailer rip 64 7 which latter it f stoned in the U-shaped top hat channel I by screws 65. Similarly, joists 16' are nailed onto panel 14.
Preferably, the length of extension 26 beyond seating flange 18 on leg 22 is substantially equal to the S thickness of panel 12 (Lee FIG. I Thus, when L-shaped member 10 it secured to panel 12, edge 28 is shielded by extension 26 a to minimize damage to thus edge. More importantly, the inside corner edge of the wall form is now defined by the outer r~ght-~ngle planar metal surfaces of ,0 extent ion 26, and not by the wood of edge 28.
A best shown in FIG, 3, an angle iron 44, comprised of legs aye end 44b 3 erred to tune inner surface of panel 14, 53~ 1 preferably such that leg aye is slightly spud from the tree edge thereof. Suitable carrl~ge bolt and nuts may be used to fasten angle iron 44 to panel 14.
Leg aye it provided with series of slots 47 thereon such that, when panel 14 having annul iron 44 secured thereto ill aligned with L-shRped member 10, these 810t~ 47 are in alignment with the slots 30 provided in leg 24. Then, fasteners, such as wedge bolt 42, pass through aligned apertures 30 and 47. Wedge bolt 42 has a 610t 43 wherein, this slot being adapted to receive a wedge bolt 45. As wedge bolt 45 is forceable driven into slot 43, angle iron 44 it forced towards leg 24, and the free end of panel 14 is butted against the outer surface of leg 24, resulting in the configuration shown in FIG. 3. it may by teen that when angle iron 44 is suitably fastened to leg 24, leg aye is preferably slightly spaced from leg 24. This insures that the free end of panel 14 is driven into proper tightly abutting relationship with respect to the outer surface of leg 4.
The particular dimension of leg 24 and of angle iron 44, and the location of the respective slot 30 and 47, are such that when panel 14 fattened to leg 24, the outer surface aye of the panel and the outer Surface of leg 22 of the L-shaped member 10 exhibit an essentially coplanar relationship. Thus, an inside corner it formed between the surer surface of panel 12 (including the outer end surface of extension 26, wow together define one wall of the corner), and the outer surface of panel 14 (~ncludin~ the coplanar outer surface of leg 22, Shea together define the other wall of the corner.
In normal puritan, the Lopped member 10 remains fastened to panel 12 end to lo oust 16 in the illustrated I

manner. m us, to form the inside corner forming mold, panel 14 is secured to leg I of the Lopped member. This fastening operation it tarried out quickly and Swahili by the first fastening means, namely by lnsertin~ wedge bolts 42 into properly aligned apertures in leg 24 and in angle iron 44 and securing it with wedge bolt 45, To disassemble this assembly, wedge bolt 45 us removed from 810t 43 end wedge bolt 42 is withdrawn from the aligned apertures, Then, by reason of the thus-trotted offset 34, panel 14 (together with the joists 16' secured thereto may be stripped away from the set concrete wall in the dirPceion indicated by arrow A, and then Swung free of the L-shaped member 10. The offset between flange 3B at the terminating end of leg 24 and the juncture between legs I and 24 permits this relatively free and unobstructed movement of the wall form comprising panel 14. Panel 14 then Jay be reused in additional assemblies, such a in a truly forming Somali, another r~rner-forming symbol, or the like.
Panel 12, carrying Lopped member 10, con be reused for constructing a new inside corner assembly (or a described below with respect to Figure 6 may be used in straight wall forming).
Turning now to FIGS. 4 and 5, there is illustrated in combination with the inside corner forming member 10, an outside corner form assembly 80.
Outside corner form assembly 80 it comprised of a pair of angularly butting panels 82 and 84. When combined with the inn corner form assembly described avow typically panels 82 and 84 will be parallel to and spaced from pane 12 and 14. eye can be exteriorly braced or ~nterl~rly joined by conventional vie rod snot shown). For convenience, the tame reference numeral, but with different So tinting locator designation ore used to identify similar element. For on ex~DIple, two horizontal ought aye & b ore shown scoured to the outer surface ox panel 82.
Inside corner allmlinum Weller I and 88, of new design are shown verclcally mounted Assyria he Hartley joists aye & b end 16c d by fastening clip 46~ etc.
hastening clip 46~ & lb clamp the lips of flanges 90 and 92; and ~imllarly fastening clips 46c d clamp the lips of flanges 94 and 96.
Corner waler By us formed of a major leg 87 and a minor leg 89 owned a right angles by a top web 95 . Waler 88 simllsrly has legs I and 93 and web 97. The major and minor legs such as 87 and 89~ preferably are dimensioned 80 that they teat on the flange aye of their re~pecti~re ooze aye at approximately a 45 angle. Each top web 95 or 97 has a longitudinally disposed series of apertures 99 (see FIG. 5 and 7 for accommodating a issued 98 there through. Advantageously in sun eight foot ou~slde corner wet r, where would be seven 4" x 1 1~4" apertures. The tie-rod 98 passes through such an aperture 99 and is secured to waler 86 by means of a King nut 100. Nut 100 preferably Yeats Anita a reinforcing thrust plate 104. Similarly, tie rod 98 ivy secured at it other end to waler 88 by wing nut 1û2 screwed against plate lû6. To angled tie rod 98 tightly ekes the subside corner one d yet it easily disassembled. The complete outloud corner asset-by typically will have more than one tie rod 98 swooning walers 86 and 88.
These ties I are preferably EYE a 45 to the owe 6t8 aye, 16c; but because of the spicing between flanges 90 and 92, this con be appreciably varied. This usually it not possible with 'eke prior art.
When this outside corner form assembly is used in come bination with the ~0rede6crlbed inside caner forming assembly 10, a tight and efficient corollary wall mold I eBtabli8hed.

One advantageous feature of the prevent lnven~iorl it that pull dedicated accessory hardware is not needed.
The bolt, clip, nut, angle, and tie rods are all derived from extolling equipment. Only the outside waler and the inside corner forming member are unique.
Another advantageous feature it that the inside corner forming member normally erred to panel 12, need not be dedicated Solely for forming corner. If necessary, panel 12 may be linearly joined to an adjacent panel, such as panel 14 in the manner shown n FIG. 6, in order to form a straight wall mold.
Referring more particularly to FIX. 6, where is illustrated a modified combination of panel 12 linearly secured to panel 14 through the L-shaped member 10. Instead of the angle 44 being secured to the leg .24 such that panel 14 forms a right ankle inside corner with panel 12);
in FIG. 6 the angle 44 is fastened by one of it legs 44b to the outer face of leg I by a pair of wedge bolt 42 and 45 (through optional hot 40 in leg 22).
Thus> panel 12 and 14 my be used in combination to form a straight-wall mold by using optional apertures 40.
This demonstrate the flexibility of Lopped member 10.
However, when the Lopped member is used in the inside corner configurstisn shown in FIGS. 1-4, the apertures 4 would have o be fitted plugs lG8, formed of plastic or other suitable maternal.
Modification in the foregoing preferred embodiment may be made without depsrtlng from the spirit and scope so the invention. For example, include different fastening means to secure Lopped member 10 to the respective panel ~12-or to and to the panel-uupport beam member. The particular dimenRionfi of the respective legs of member 10 are not critical and may vary with different application Alto, the particular panels with which this member it used need not be limited 801ely to flat plywood panel. For example, fiber gloss panels shaped for architectural doughtily may be used. Furthermore, various other applications of the corner forming member ore within the scope of this lnven~ion in its broader aspect; including use on a wall form having wooden studs instead of aluminum ousts 16 where the leg 24 would be clamped or otherwise affixed to the nearest stud neither directly or by ohms as my be necessary). Thus it can be compatible with most any wall form what a contractor may have in hi inventory.

Although primarily intended for use in forming right angle walls of uniform icons the illustrated structure has Rome leeway for variability in the angle of the wall and/or in the top-to-bottom thickness, Also within the broader scope of the invention, the structure itself can be modified to mold different angles, shapes, or thicknesses.
As teen in dash-dot outline in Fig. 3, the length of said second portion 36 can be usefully employed to allow for accommodating different lengths of joists AYE and/or panels 1 (preferably by up to 3 inch aerations.
Referring to Figure 7, only the web 95 of waler 86 has been diagrammatically show to illustrate the preferred shape and pickling of the aperture 99 on a typical 4 inch wide web. Also owe sure an alternative heavy duty tie rod 98' and heavy duty King nut 100 ' . The latter his the advantage of being ~ufficlen~Lly large relative to the portray 99 Jo that no plate 104 8 needed (said plate 104 being an adaptor for the nut Lou used with light-duty tie rods 9 8 ) .

~353~

Two wall form each having its own Lopped member, Jan be ~olngd in linear orientation my securing the respective Lopped member face-to-f~ce, Tub referring to the linear ~rlen~ation of panel 12 and 14 Winnie in lure 6, this structure would be modified by replacing eke angle 44 by & second L-sh~ped member 10' jot Boone) mvun~ed on ought 16' end panel 14 (whereby leg 22' of L-shaped member 101 it owned phase race with the leg 22 of member 10).
Although $11ustrated for use Yerticslly, the L-shaped member is Allah very usefully employed in a horLzon~al ruination for example, in forming an overhead inside corner on tunnel). Similarly, this horizontal orientation can be used in Joining Racked wolfram vertically (this can be best visual Ed if one views Fig. 6 for this purpose as being rotated 90 degrees, such thaw the panels 12 and 14 are in a vertical plane.

Claims (3)

THE EMBODIMENTS OF THE INVENTION IN WHICH
AN EXCLUSIVE PROPERTY OR PRIVILEGE
IS CLAIMED ARE DEFINED AS FOLLOWS:

1. An outside corner waler for a concrete wall form comprising a U-shaped channel having a pair of parallel major and minor legs joined at right angles by an apertured top web, said legs terminating at their free ends in flanges coplanar with each other, said legs being dimensioned with relative lengths such that said web makes about a 45° angle with the plane of said flanges.

2. A waler as claimed in Claim 1, comprising up-turned lips on the outer edge of said flanges adapted to mate with waler fastening means, said apertures in said top web being elongated along the length of said channel, said waler being extruded from aluminum.

3. A waler as claimed in Claims 1 or 2, further comprising reinforcing washer means for receiving the compression forces from the nut of any tie rod positioned through said apertures to spread such forces over an enlarged area of said web.