CA1234298A - Shoring and scaffolding frames of mechanically connected components - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE

A frame for supporting vertical loads and an aluminum tubular leg for such frame is disclosed. The legs are joined by a brace arrangement and connectors are used for mechanically connecting the brace arrangement to the legs for stabilizing the legs when under load. Each of the legs has spaced portions which are substantially symmetrical about a plane containing the longitudinal axes of the frame legs and which provide areas for mechanical connection of the brace arrangement to the leg. Such mechanical connection of the frame provides a versatile frame which may be used in concrete forming work and which may be readily repaired.

Description

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This invention relates to vertical load supporting frames and legs therefore and, more particularly, to frames and legs which may be used in the concrete forming industry BACKGROUND OF_THE_INVENTXON
In the field of concrete forming, several structures are available for supporting panels which define floor areas onto which concrete is poured. In situations where there is sufficient area surrounding the building being constructed and the construction is above ground, a large scale concrete forming structure of the type disclosed in Avery, United States patent 3,787,020 issued January 22, 1974 is advantageously used. Such structures can be rolled out from underneath a poured set floor, raised by crane and placed on the freshly set floor to support panels defining the next floor. Such concrete forming structure is made of aluminum beams and truss components having hinged screw jacks associated with the lower portion of the structure to facilitate leveling of the forming structure prior to pouring and removal of the structure from under the set concrete floor.
Other types of aluminum structures, which are used in the concrete forming industry, are, for example, disclosed in Dashes, United States patent 3,966,164 issued June 29, 1976.
The patent discloses an adjustable truss support, wherein a bolted trusts has vertical column members forming components of the trusses. Lower column members may be inserted in the trusses to provide supports having height adjustment and force determination so as to be able to support the truss loads. 'rho truss construction is not entirely of aluminum .

I

1 and, in particular, the column members are made of steel.
The choice of steel is because of its strength characteristics compared to aluminum. This results in a structure having mixed materials with some chance of galvanic corrosion.
Van Meter, United States patent 4,037,466 issued July 19, 1977, discloses concrete shoring structure which may be moved about by use of a crane. The structure comprises corner posts spaced in quadrilateral relationship, supporting pairs of stringers along opposed sides of the quadrilateral so formed. In the structure, a number of pins are used to secure cross-braces in two different directions where the spacing between the corner posts can be easily changed.
Arrangements are made using a shackle on each post to lift the structure and telescopically engaged staffs are secured within the corner posts by pins for adjusting the height of the structure. However, the structure has limited effectiveness and, in any event, requires considerable assembly at the site. The pins in most instances are welded to the supporting structure, so that if they are damaged or broken they cannot be easily replaced or repaired in the field.
Cody, United States patent 4,106,156 issued August 15, 1978, discloses an adjustable concrete shoring apparatus. A
truss like structure has a plurality of diagonal struts extending between pairs of back-to-back channels which form upper and lower cords of the truss. The adjustability in the Cody structure comes as a consequence of a series of holes through which bolts may be passed in the plurality of truss forming locations, by which the spacing between upper and ~34~

1 lower cords can be adjusted, but also by which the load capacity of the truss is affected. The Cody structure is one which can be adjusted in the field, but in order for it to be manipulated by hand, it must be totally disassembled.
In situations where sub-basements, parking garage floors below ground level, and smaller scale installations where cranes of suitable capacity are not readily usable, a lightweight shoring frame is desirable for supporting structure onto which concrete floors may be poured. Such shoring frame supports stringers across which beams, such as those disclosed in United States patent 4,144,690 issued March 20, 1979 and 4,146,999 issued June 5, 1979, may be placed. Commonly, such shoring frames have been made from welded steel components which, when damaged in the field, cannot be replaced so that the complete frame must be scrapped or possibly repaired by rewelding.
According to this invention, a frame is provided which may be mechanically assembled and disassembled, yet when assembled provides an extremely rigid and high load-bearing capacity frame. The provision of mechanical disassembly provides for repair and/or replacement of components in the frame at the job site without the use of special welding techniques or tools. The legs of the frame are made of aluminum to provide a lightweight structure.
SUM_ARY_OF_THE_INVENTION_ A frame, according to this invention, for supporting vertical loads comprises a pair of spaced aluminum tubular legs joined by a brace arrangement which is mechanically connected to the legs. The brace arrangement is adapted to stabilize the legs when under load. Each of the legs has I

1 provision for mechanical connection of the brace arrangement to the respective leg. The relationship of the connections is such to provide, when the frame is complete, a fixed mechanical connection of brace arrangement to frame legs.
Each of the legs has spaced portions which are substantially symmetrical about a plane containing the longitudinal axes of the frame legs. The spaced portions provide areas for mechanical connection of the brace arrangement to the legs.
The leg for the frame may have the spaced portions extending outwardly from the leg wall away from leg axis.
Fastener means mechanically connects a component to the brace arrangement which cooperates with the spaced portions to such leg. The spaced portions may be integral with -the leg or a support means for such spaced portions may be secured to such leg.
The frame may have means for mechanically connecting the brace arrangement to the legs. Each leg has the spaced portions in the form of spaced wall portions which are substantially symmetrical about the plane containing the longitudinal axes of the frame. The spaced wall portions provide areas for mechanical connection of the connector means to the legs.
Each of the connector means straddles the leg for connection to the respective areas of the spaced wall portions with at least portions of the interior surface of the connector being adjacent at least corresponding portion of Leg exterior surface between the spaced wall portions.
This relationship provides for a f iced interconnection of brace arrangement to let when the assembly is complete.
The leg, adapted for use in the frame according to an :~34~

1 aspect of the invention, has spaced stepped wall portions which are substantially equidistant from the longitudinal axis of the leg and are substantially symmetrical about the plane containing the longitudinal axes of the legs when used in the frame. The stepped wall portions provide areas for mechanical connection of the connector means to the leg. At least portions of the leg exterior surface between the spaced stepped wall portions are adapted to be adjacent the interior surface of the connector means when used in mechanically connecting a brace arrangement to the leg.
The leg for the frame, in having the stepped wall portions, may be so formed to displace the areas for mechanical connection outwardly of the leg longitudinal axis to accommodate Sacramento means without substantially obstructing the leg interior.
The aluminum leg may be formed by an extrusion process, whereby the spaced wall portions are provided along the length of a leg to accommodate and facilitate mechanical connection of components of the brace arrangement to any desired position along the leg.
BRIEF DESCRIPTION OF_THE_DRAWINGS
Preferred embodiments of the invention are shown in the drawings, wherein:
Figure 1 is a perspective view of frames according to this invention interconnected by cross-bracing arrangements to provide supports for concrete forming structure;
Figure 2 is an exploded view of the assembly of bracing components to be connected to a frame leg by way of a mechanically fast enable connector;
Figure 3 is a cross-section through a leg of Figure 2 ~LZ3~ZS~

1 having the connector mechanically fastened thereto, according to an alternative embodiment;
Figure 4 is an isometric view of a mechanical fastener used in securing the connector of Figure 3;
Figure 5 shows a portion of the leg, according to this invention, having a slide lock assembly for cross-brace members secured to the leg;
Figure 6 is a cross-sectional view taken along lines 6-6 of Figure S;
Figure 7 is an isometric view of a frame connector for use in aligning stacked frames;
Figure 8 is a cross-section view taken along the lines 8-8 of Figure 7;
Figures 9 J 101 11 and 12 are cross-sectional views showing alternative embodiments for the frame leg cross-section and brace arrangement connection thereto;
Figures 13, 14, 15 and 16 are cross-sections showing alternative embodiments for the cross-members of the brace arrangement which provide for mechanical fastening of articles thereto;
Figure 17 is a cross-sectional view showing an alternative embodiment for mechanically connecting the brace arrangement tote leg;
Figure 18 is an isometric view of an end cap assembly for the frame member;
Figure 19 is an isometric view of a base plate assembly for the frame;
Figure 20 is a side elevation of a liftable stringer support for connection to the top lo a support frame; and Figure 21 is an end elevation of the liftable stringer I

1 support of Figure 19.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The general arrangement and use for frames, according to this invention, are shown in Figure 1. The assembly 10 comprises two sets of stacked frames 12 and 14. The difference between frames 12 and 14 is with respect to their heights; frame 12 being approximately four feet high and frame 14 being approximately six feet high.
At the upper ends of the uppermost shoring frames 14, there are end caps in which may be inserted tack screws 29 having handles 31, as shown at the far side of the structure of Figure l; or there may be extension staffs 33 inserted in the upper ends of the frame legs 16, and they may optionally carry jack screws and handles therefore at their upper ends.
All of the jack screws of the upper ends terminate in U-heads 35 (or liftable stringer supports as discussed hereafter), which support primary members which may be stringers or beams 37, across which are placed secondary members or beams 39 which support panel 41, in the known manner.
At the lower ends of the bottom most frames, there may be placed base plates 214, as discussed hereafter, which may directly terminate at the bottom ends of frame legs 16. AS
shown at the far side of the structure of Figure 1, end caps may be used to accommodate jack screws 39 having handles 31.
Alternatively extension staffs may be placed in the bottom ends of the frame legs.
Various shapes may be provided for the frame legs and the devices for mechanically fastening the brace arrangement to the frame legs. Preferred embodiments for the shapes of the legs and connectors are shown in Figures 2, 9 through 12 ~23~

1 and 18. With reference to Figures 2 and 3 of the drawings, this is a preferred frame leg shape and connector therefore In the leg 16, identical faces 18 and 20 are shown designated front and back faces) and identical faces 22 and 24 are shown (designated side faces and more specifically the outer side face and the inner side face with respect to the leg shown). on the side faces 22 and 24 are found ridges 26. Each of the front, back and side faces has a pair of shoulders 28, Jon the front and back faces) and 30 (on the side faces), with ridges 26 being more specifically associated with shoulders 30. The profile of the frame leg is, therefore, substantially rectilinear with corners 32, so that the inside surfaces 34 and 36 of the front and back faces 18 and 20, respectively, are stepped forward and rearward, respectively, of the corners 32.
The stepping forward and rearward of the inner surfaces 34 and 36 of the corners 32 permits an accommodation of bolt heads 40 in Figure 2, or fastener plates 38 in Figure 3 for bolts 40 which pass through holes formed in the front and back faces. That is, the entire fastener 38 or a bolt head as discussed hereafter) can be installed in such a manner, within the frame leg, without substantially obstructing insertion of another member for sliding up or down within the frame leg fitted about the corners 32.
Each frame leg 16 has a connecting bracket 42 secured to it, one near the top and bottom of each such frame leg.
An exploded view of the assembly of the connecting bracket and other structure to the frame leg is shown in Figure 2.
Two alternative methods, by which each connecting bracket may be secured to the frame leg 16 at its respective lZ3~

1 position by bolts 40 which pass through opposed pairs of holes 44 formed in each of the front and back faces of each frame leg, are shown in Figures 2 and 3. As shown in Figure 3, each bolt 40 may be inserted with its bolt head at the outside of the front or back face, against a "lock" washer 43, with each bolt 40 threadedly engaged to a fastener 38.
Alternatively, the bolts 40 may be passed from the inside of the frame leg 16 to the outside, engaging nuts 45, as shown in Figure 2. Common to either arrangement is that the opposing stepped sidewalls at 34 and 36 provide areas at bolt holes 44 for mechanically fastening the connector to the leg. Such areas of connection are substantially equidistant from leg axis 23 and are substantially symmetrical about the plane 21 which contains the axes 23 of both legs in the frame.
With specific reference to Figure 4, the fastener 38 is shown, which serves the purpose of a bolt retaining means.
The fastener 38 has a central portion 48, in which there are formed holes 50 and upstanding portions 52 which are tapped or threaded as at 54 near each end. The spacing between the neck or upstanding portions 52 is the same spacing as between the holes 44 in the front and back faces of the frame leg 16. The fastener 38 is preferably formed of steel and the neck portions 52 are formed in it by upsetting, extruding or drawing, after which they are tapped at 54. Alternatively, the fastener plate may be pierced or drilled and thereafter tapped to form the threaded portions 54 which engage the bolts 40 as referred to above. When the fastener 38 is in place, on one of the inside surfaces of the frame leg, the bolts 44 are threaded into portions 54 and tightened against lock washers 43.

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The fastener 38 provides two threaded apertures which are fixed relative to one another. This facilitates the connection of both bolts 40 to the fastener, because as soon as one bolt is threaded into the fastener 38, the location of the threaded opening I relative to the opening I in the leg is aligned. In addition, the fixed relationship of the two fastener openings 54 prevent relative rotation during the threading and tightening of bolts in mechanically connecting the connector 42 to the leg 16. It is appreciated that other arrangements may be provided for the fastener 38, such as two nuts having threaded portions where the nuts are interconnected by a bar or the like to provide their fixed stationary relationship. The mating aspect of the fastener 38 with the interior of the stepped portion of the leg sidewalls also prevent rotation of the fastener device while the bolts are being tightened Therefore, the stepped portions not only accommodate the fasteners so as to not appreciably obstruct the interior of the leg, but also in providing a mating relationship with the fastener facilitate connection of the connector to the leg.
The holes 50 in the fastener 38 are provided to mate with the hole 51 in the frame legs. The holes are provided to accommodate adaptor pins and the like which are used in interconnecting the legs in a manner to be discussed.
As is particularly noted from Figures 2 and 3, each connecting bracket 42 is generally U-shaped when viewed from above, having a pair of lugs or legs 56, whose spacing between the inside surfaces of the lugs is slightly greater than the distance from front to back faces 18 and 20 of a frame leg. There is a pair of holes 58 in each leg 56 of the Lowe 1 connecting bracket 42, the spacing between the holes 58 being the same as the spacing between holes 44 formed in each of the front and back faces 18 and 20 of each frame leg. The connection of each connecting bracket 42 to each frame leg is effected by means of bolts 40 and nuts 45 threaded thereto, or bolts 40 into connector or fastener plates 38. Another pair of holes 59 is also formed in each leg 56 of each connecting bracket 42, one of each of which registers with the hole So in the frame leg 16. Thus, it is seen that there is no designated up or down direction, nor a designated left or right end, for each connecting bracket 42.
The U-profile of each connecting bracket 47 is such that a base 62 is centrally located between the lugs 56 and is adapted to span and contact the side face 24 of the frame leg in the manner illustrated. A pair of stubs or plates 64 extends away from the base 62, in the opposite direction to the lugs 46. The connector, therefore, functions as a support for the outwardly extending spaced plates 64. The spacing between the stubs 64 is less than the spacing between the lugs 56. The stubs 64 each have a hole 66 formed in them.
The connecting brackets 42 are preferably formed of extruded aluminum and are afterwards cut and drilled so as to have the side profile, as illustrated in various Figures of the drawings. The integrity of the connecting bracket as an extruded piece is thereby assured.
As shown in Figure 1, 2 and 3, each frame is assembled by mechanically connecting a pair of tubular horizontal braces 68, secured between and cooperating with a brace arrangement to the legs. The brace arrangement is constructed in a manner to stabilize the legs when the frame ~34~

1 is under load. The brace arrangement comprises, according to this embodiment, pairs of connecting brackets 42, between opposite pairs of frame legs 16 and a diagonal brace 70 connected from the upper connecting bracket in one frame leg to the lower connecting bracket of the other frame leg. The horizontal braces 68 may be each identical to one another (except as discussed hereafter in respect of varying frame widths) and each diagonal brace 70 may be connected from left to right or right to left. It is understood, however, that other arrangements may be provided for the bracing between frame legs, as long as the required stability is provided.
The ends of the components of any desired form of brace arrangement is, according to this invention, mechanically connected to the frame legs, so that the brace arrangement in its entirety or its individual components are removable from the frame legs. With the particular brace arrangement shown, the horizontal members are arranged so as to be fixedly connected to the vertical legs at a 90 degree angle thereto.
According to the embodiment of Figure 1, each of the horizontal braces 68 is substantially a square or rectilinear tube, preferably of extruded aluminum. Each tube has front and back faces 72 and 74 and opposed top and bottom faces 76. Likewise, each diagonal brace 70 has similar front and back faces 80 and 82 and opposed top and bottom faces 86 respectively. The width and height of the diagonal braces 70 are greater than those of the horizontal braces 68.
There are two preferred alternative ways in which the horizontal braces 68 may be secured within the bolted shoring frame, particularly as to their connection to the connecting brackets 42. In the one alternative, the horizontal brace 68 :3LZ3~

1 is secured to the connecting bracket by a bolt 88 having bolt head 90 and nut 92 passing through holes 94 in the front and rear faces 72 and 74 of the horizontal brace 68 and through the holes 66 formed in the stubs 64 in connecting bracket 42. In the case where the tubular diagonal brace 70 is also secured to the connecting bracket, as in Figure 3, the bolt 88 passes through holes 98 formed in the front and rear face 80 and 82 of the diagonal brace as well and the length of the bolt 88 is chosen appropriately.
Alternatively, the horizontal braces 68 may be welded to the connecting brackets 42 by a filet weld 100 made to horizontal brace 68 to the base 62 of the connecting bracket 42. These welds are shown in Figure 3 where there is no bolted connection of the free end of horizontal braces 68;
i.e. the end which does not carry one end of a tubular diagonal brace 70, to the respective connecting bracket 42.
In yet another alternative assembly, the horizontal braces 63 may be both welded and bolted to the connecting brackets 42, combining all of the details discussed above.
Preferably as stated, each of the frame legs 16, horizontal braces 68, connecting brackets 42 and the diagonal brace 70 of each frame is formed of extruded aluminum.
Suitable alloys of aluminum may include Standard Structural Aluminum Alloys 6061, 6351 and 7005 by way of example only.
A distinct advantage in the mechanical connection of a brace arrangement to the legs of the frame permits the use of a brace arrangement which may be made of materials different from the leg material. For example, the brace arrangement may be constructed of steel tubing or lightweight I

1 fiberglass. Either construction can be adapted to mate with the connectors 42 so as to be secured to the legs in -the manner discussed in Figures 2 and 3.
The means by which the shoring frames are placed in extended height relationship one to another is by way of frame connectors 104 which are shown in Figures 7 and 8.
Each frame connector 104 comprises a length of tubing 106, preferably extruded tubular aluminum, which has a profile adapted to fit within the tubular frame legs 106, such as by means of rivets or bolts 110 or 112 (as alternatives for each other) and as indicated in Figure 8.
The profile of the connector tube 106 is such as to fit intimately within the frame legs 16 and the length of the connector tube 106 is not so great as to extend below or above the topmost or bottom most bolts 40 securing connector brackets 42 near the ends of the frame legs being extended.
There may be a plurality of ribs 11~ formed on the outside peaces of the connector tube 106, so that the connector tube may be more accurately centered when it is inserted into any one of the tubular frame legs 16. Also so as to accommodate the insertion of the connector tube into the tubular frame legs 16, or the placement of a tubular frame leg over the connector, the ends of the connector 104 may be chamfered as indicated at 116.
The profile of the collar 108 is such as to cause interference with the end of a frame leg 16, to thereby preclude intrusion of the collar within the frame leg and assure that the length of connector tube 106, which is above or below the color 108, extends into the respective frame leg.
In the preferred embodiment, the profile of the collar 108 is I

1 the same as the profile of the frame leg and is simply a short piece of frame leg extrusion secured to the connector tube extrusion.
A Unshaped locking pin 112 secures the frame connector into the respective upper and lower frame legs. Each lock pin 112 has two legs, one of which passes through holes 118 in the front and back faces of the appropriate frame legs and through holes 119 in the connector tubes 106, so that one leg of the lock pin 112 is above the collar 108 and the other leg is below the collar 108. In a preferred embodiment of the lock pin 112, one of the legs of the lock pin is longer than the other. Either leg, usually the longer leg, may be adapted for locking by way of a split pin or C-clip in the assembled configuration so as to preclude inadvertent disconnection of the lock pin 112 from the extended frames.
Also washers snot shown) may be welded to the legs of the locking pin 112 or broached to preclude jamming of the pin into the holes 118 of frame legs 16.
Especially where the collar 108 has the same configuration as each frame leg, axial loading from an upper frame to a frame upon which it is superimposed is assured through the frame legs of each frame. Thus, more even load distribution is assured and the chances of buckling or failure of any frame leg are diminished.
So as to assemble a shoring structure of the sort shown in Figure 1, pairs of showing frame legs 12 or 14 are spaced apart, with pairs of cross-braces 120 extending from one of the spaced-apart pairs of frames to the other spaced-apart pair of frames in crossed relationship or formation to each other. Each cross-brace member 120 may be flat, tubular or 1;23~ 8 1 angular in cross-section. The ends of each of the cross-brace members 120 are fitted to the respective frame leg 16 at lock assemblies 124, each of which is on a respective inner face of a frame leg near the top or bottom of each such frame leg respectively. It will be noted that the upper lock assemblies 124 on the shorter and taller frames are above the upper horizontal brace 68.
The sliding drop lock or gravity lock assemblies 124 are more fully illustrated in Figures 5 and 6. Each sliding lock assembly 124 includes a bolt 126 (also referred to as a drop-lock pin or post) which extends through a hole formed in the respective inner face 24, for purpose of this discussion, of a frame leg 16. Bolt 126 has bolt head 128 whose inner end is clear of a line extending between the inner faces of shoulders 30 from corners 32. A track member 130, which is a flattened U-shape having a base portion 132 and legs 134, is secured to the frame leg by a jam nut 136 (which may also include a lock washer 138) tightened against the outside surface of the base 132 of the track member 130. The ends 140 of the legs 134 of the track member 130 contact a portion of the face of the frame leg on the shoulder 30, as shown.
Preferably as indicated above, there are ridges 26 formed on each shoulder 30 and corresponding ridges or teeth 142 formed in the ends 140 of the legs 134 of the track member. The cooperation of the ridges 26 and the teeth 142 is such that, when the jam nut 136 is tightened against the base 132, a reaction occurs between the ridges 26 and teeth so as to preclude spreading of the legs 134 of the track 132. Once again, for ease of assembly and manufacture, the extrusion, which is used to form the frame legs 16, is made I

1 with ridges 26 on both of the side faces thereof, so that there is no question of a left hand or right hand extrusion being required for use as a frame leg.
It should also be noted that the underside of the track member 130 has, near the upper inner ends of each of the legs 134, a landing surface 144 which is adapted to contact a corresponding portion of the inner side face 24 of the frame leg at 146, when the track member 130 is secured to the frame leg by tightening of the jam nut 136~ Positive force transmission from the track member 130 to the frame leg is thereby assured, so that any upsetting or twisting moments which may occur in the bolt 126 or against the track member 130, especially during a time when the shoring frame is either being flown or otherwise unevenly loaded, is transferred into the frame leg, whereby the security of the sliding lock assembly and the cross-brace held thereby is assured, so that there is less likelihood of damage or breakage of the sliding lock assembly.
The slide locking member 148, as particularly illustrated in Figure 5, has an inner leg or slide portion 150. The lower end of the slide 150 at 152 is bent slightly outwardly to prevent the slide from being removed upwardly out from behind the base portion 130. At the upper end of slide 150, a transverse portion 154 is provided which is stepped at 156 to provide further transverse portion 158. At the extremity of transverse portion 158 is a depending portion 160 which has an open ended slot 162 provided therein to accommodate post or bolt 126. The relationship of the base 130 to the leg 16 is such to define a sleeve within which the slide 15Q may slide up and down, where a closed end ~L~23~

1 slot 164 is provided in the slide 150 to accommodate the bolt 126 to permit the slide to move up and down. Provided at the extremity of bolt 126 is a wing nut 166 which may be used to secure the slide lock in its down position. the slide lock operates in a manner such that, when in the down position, it captures the ends of the brace members which are placed over the post or bolt 126. When the slide lock is moved to its second position, the depending end 160 clears the bolt 126 sufficiently to allow the brace member free ends to be removed from the bolt, thus facilitating disassembly of the interconnected frames. The stepped portion 156 provides for positive location of two brace ends against the base portion 130, since the transverse portion 154 is sufficiently wide to accommodate two brace ends. However, should four brace ends be positioned on bolt 126, then depending portion 160 is sufficiently spaced from the base portion 130 that the four brace ends are captured between depending portion 160 and the base portion 130. Such an arrangement prevents excessive movement of the cross-brace member ends along the bolt 126.
For some applications in the concrete shoring frame, it may be required that substantially thicker cross-bracing members be used to interconnect one frame to another. In this instance, clamps may be used to clamp in various orientations thicker bracing members to the frame legs. Due to the various orientations of such braces, it is preferable that the leg be substantially square with four similar sidewalls to simplify the clamp device required to clamp a brace member to anyone side of the leg. Considering the leg of Figure 3, it has four similar sidewalls 18, 20, 22 and 24 which approxilnate a square. Thus, the sidewalls are ~3~8 1 symmetrical about the plane 21 and another plane which contains leg axis 23 and is perpendicular to plane 21.
Alternative embodiments for the leg configuration and corresponding connectors are shown in Figures 9 through 12.
In Figure 9, a rectangular-shaped leg 170 has opposing stepped sidewalls 171 and 172 and front and rear sidewalls 173 and 174. The opposing stepped sidewalls 171 and 172 are so formed as to provide inward stepped portions 175 which define a recess 176 and have spaced opposing projections 177.
This configuration defines what is commonly referred to as a bolt slot to permit the head 178 of a bolt to be inserted in the slot, extend through an appropriate hole in the connectors 179, whereby each of the connectors 179 is secured to the leg 170 by nut 180 threaded onto the bolt and tightened thereon. The bolt has been left out of the stepped sidewall 171 for clarity in illustrating the bolt slot recessed area 176. Each connector 179 has lug portion 181 with an interior face which fits the exterior of the rectangular leg 170, such that with the connectors mechanically fastened to the legs the interior surfaces 182 of the connectors abut the exterior face of frontal 173.
The connectors 179 include outwardly projecting plate portions 183 which function in the same manner as the plate portions 64 on the connector 42 of Figure 3. A bolt 184 is used to connect the horizontal member 185 in the manner shown.
In Figure 10 a somewhat differently shaped leg is shown. The leg includes a frontal portion 186 and diverging wall portions 187 and 188. The diverging wall portions 187 and 188 include stepped portions 190 which form the bolt slot recesses 192. Bolts 193 are, therefore, used I

1 to mechanically fasten the connector 194 to the leg 195.
Extending rearwardly from the diverging wall portions 187, 188 are parallel sidewalls 196 and 197. A rear wall 198 interconnects the parallel walls 196, 197 and includes a bolt slot arrangement at 199.
The connector 194 has wing portions 203 and 205 which straddle the face 186 of the leg and contact the spaced stepped wall portions of walls 187 and 188. The connector 194 includes an inner portion 207 between the wings 203 and 205 which abuts the face 186 of the leg when the connector is mechanically fastened to the leg. The connector 194 includes plate portions 209 which function in the previously discussed manner for facilitating connection of a horizontal cross-member 211 to the connector 194 by use of bolt 213.
Turning to Figure 11, a circular leg 300 is provided with spaced wall portions at 302 and 304 which provide for mechanical connection of the connector 306 to the circular leg 300. The spaced wall portions are provided in appropriate areas with apertures 308 and 310. Such apertures accommodate either bolt 312 or rivet 314 used in connecting the connector to the leg. In using the bolt 312, it is threaded into the curved plate fastener 316. The curved plate fastener 316 has the curvature of the interior 318 of the circular leg 300. The fastener has threaded aperture 320 which receives the threaded bolt 312. In tightening the bolt in the fastener, or alternatively riveting such connection, the connector 306 with its interior surface contacting the sidewall between apertures 308 and 3:L0, is mechanically fastened to the circular leg. The connector 306 includes the spaced leg or plate portions 322 for securing horizontal I

1 member 324 to the connector by use of bolt 326.
Figure 12 shows a somewhat rectangular leg 328 having opposing sidewalls 330 and 332 with stepped wall portions 334 and 336. The stepped wall portions provide areas to which the connector 338 may be secured by welds 340 in the manner shown. The connector 338 provides a support for the plate portions 358 which are used in the mechanical fastening of the horizontal member 354 to the leg 328. The plate portions extend outwardly from the leg wall away from its axis 352 and they are symmetrical about the plane 350. The interior surface 342 of the support 358 abuts exterior surface portions 344 and 346 of the leg, where an inward step 348 is provided in the face of the leg 328. The wall portions 344 and 346 are symmetrical about the plane represented by dashed line 350. This plane contains the longitudinal axis at 352 of the leg and also includes the longitudinal axis of the spaced leg in the same frame, which is interconnected to leg 328 by the horizontal cross-members 3S4 as secured to the support 338 by bolt 356. The welds at 340 to the stepped wall portions 334 and 336 are symmetrical about the plane 350 and are equidistant from the longitudinal axis 352 of the leg. According to this embodiment, the horizontal member 354 is sufficiently narrow to fit between the plate portions 358 and have the bolt 356 fasten the cooperating portion of the member 354 to the plates 358. The support 338, therefore, provides a means whereby spaced portions in the form of plates 358 are located on the leg.
To provide for mechanical connection of the brace arrangement to the legs of the various embodiments of Figures 3 and 9 through 12, in each instance the following common ~L23~

1 elements are provided. The leg has spaced wall portions which are equidistant from the longitudinal axis of the leg and which are symmetrical about the plane which contains the longitudinal axes of both legs in the frame. These planes are shown in Figure 3 at 21, in Figure 9 at 352, in Figure 10 at 354, in Figure 11 at 356 and in Figure 12 at 350. The face of the leg is adapted so as to be adjacent the interior surface of the connector, thus there is mating fit between the interior surface of the connector and the portion of leg wall between the spaced wall portions. Such contact assures a fixed interconnection of the brace arrangement to the let since the connector is not permitted to swivel or pivot about the fastener bolts, because of the interference between the interior surface of the connector and the face portion of the leg. In Figure 12, portions of the leg 34~ and 346 contact the interior of the connector to satisfy this requirement.
In this embodiment, such portions are symmetrical about the plane 350. Alternative arrangements include providing the planar exterior surface by face portions 24 of Figure 3, 173 of Figure 9 and lay of Figure 10, which present a surface which is symmetrical about the respective planes in the noted Figures. With the circular leg 300 of Figure 11, the surface portion against which the connector 306 contacts is circular, thus the connector is provided with a circular interior surface to mate with the exterior of the leg in facilitating mechanical fixed connection of brace arrangement to the leg.
Figures 13 through 16 show alternative sections for the cross-members and diagonals used in the brace arrangement for interconnecting the legs. Common to each of these configurations is the provision of a slot which is adapted to I

1 receive a bolt head to function as a bolt slot. In Figure 14, the brace member 360 is rectangular in shape and has its bottom wall 362 provided with a slot 364 which has reinforced edges 366. An appropriate bolt head may be inserted through the slot 364, rotated 90 degrees for seating on the reinforced edges 366 to permit fastening of various articles to the brace component which may include angle reinforcing portions.
In Figure 14, the brace component 368 has a curved upper wall 370 and straight parallel sidewalls 372. The bottom 374 has provided thereon downwardly depending lips 376 which define a bolt slot at 378 to receive a bolt head, for the reasons previously discussed.
Figure 15 shows the brace component 380 having its bottom wall 332 provided with the slot 384 to accommodate fasteners. Figure 16 shows a brace component 386 with curved upper wall 38~. The battalion wall 390 includes a slot 392 and has an interior wall portion 394 to provide a bolt slot recess at 396.
Referring to Figure 17, an alternative arrangement is shown for mechanically connecting a component of a brace arrangement to a frame leg. The frame leg 400 has five sidewalls 402, 404, 406, 408 and 410. In keeping with the other previously discussed embodiments of the invention, the leg has spaced portions 412 and 414 to which a cooperating component of the brace arrangement is secured. In this instance, instead of using a connector or the like to provide the spaced plate portions on the leg, the spaced portions 412 and 414 are integral with the leg. The spaced wall portions 412 and 414 are symmetrical about the plane 416 which contains 29~

1 the axis 418 of leg 400 and corresponding axis of the other frame leg. The integral forming of the wall portions 412 and 414 on the leg may be provided by extruding the leg with the hollow portion formed by leg wall 402, spaced walls 412 and 414 and transverse wall 420. As determined by the desired array for the brace arrangement, particular locations on the leg will be used in mechanically fastening the brace component ends to the spaced frame legs. The portions of the walls 412, 414 and 420 of the leg, apart from the connection location, may be removed from the extruded leg by standard milling techniques.
According to this embodiment, the brace member 422 has its end portion adapted so as to cooperate with the walls 412 and 414 and thereby overlap them in a manner similar to that of Figure 3. The overlapping portions are mechanically fastened by bolt 424.
Turning to figures 18 and 19, end cap assembly and base plate portions are shown. The end cap is used for insertion in an open end of the frame leg to provide support for a jack screw, such as 29 shown in Figure 1, where the nut portion with handles rest on the outer face of the end cap. The base plate is used for insertion in the bottom of the open end of the frame to support the bottom end of the shoring frame against a sill, a previously formed concrete floor, graded earth or such other foundation on which the shoring frame assembly may stand and support the loads to which it may be subjected. Turning to Figure 18, an end cap assembly 201 has a plate 202 and a tubular staff 204, which is welded to the underside of plate 202. The tube 204 is substantially circular and has four equidistant spaced lugs 207 at its I

1 periphery. The plate 202 may be configured at each corner 208 so as to substantially match the profile of a frame leg 16, but of a slightly greater dimension. The dimensions of the tube 204 are such that it will extend into a frame leg 16, and the lugs 207 position and secure the tube in place by their cooperation with the corners 32 of the leg. A hole 210 is formed in the plate 202 to accommodate the screw of the screw jack as it extends through the hole 210. Conveniently the plate 202 is extruded so that no additional fabricating steps other than welding, or placing the insert 206 are required. Holes 212 are formed around the periphery of the tube 204, spaced between the lugs 207, so that the end cap assembly 201 may be secured in place to the frame leg by pins or bolts, if necessary.
The base plate assembly 214 of Figure 19 is adapted to fit directly to a frame leg 16. The base plate assembly 214 has a tube 216 similar to tube 204 of the end cap assembly 201 of Figure 18, except that it is shorter in length. The tube 216 has lugs 218, the same as lugs 207 of tube 204, and is otherwise identical to the tube 204. Poles 220 are formed for purposes of securing the base plate assembly 214 to a frame leg 16 by a pin or bolt passed there through.
Plate 222 is also formed of extruded aluminum material, but in this case the extrusion is formed lengthwise rather than crosswise as with plate 202 of the end cap assembly 201.
The tube 216 is secured to the plate 222 by welds 221, placed around the circular peripheral portions of the tube, but not around the peripheral portions of lugs 218 where they contact the surface 224 of plate 222. The plate 222 has an upper surface 224, a pair of stepped shoulder surfaces 226, and a 1;~3~

1 pair of side sloping shoulder surfaces 228. Holes 230 are formed through the thickness of plate 222 in the shoulders 230. The corners of the plate 222 may be chamfered as at 232.
Turning now to Figures 20 and 21, there is shown a liftable stringer support which is particularly adapted for use with shoring frames according to this invention, and which may also be used for other welded steel shoring frames.
The liftable stringer support 234 is particularly adapted for use with extruded aluminum stringers having a configuration as shown in Canadian Registered Industrial Design 456992, issued July 23, 1979, and as shown generally at 235 in Figures 20 and 21.
At the upper end of a shoring leg 16, there may be installed a hollow screw 136 at the top end of which is a U-shaped bracket 238 secured (such as by welds 239) to a post 240 inserted into the screw. The post 240 and U-shaped bracket 238 may also be otherwise mounted at the upper end of a shoring frame leg by a pin passed through holes 191 in the frame leg and 142 in the post. The U-shaped bracket 238 has a base portion 242 and a pair of upwardly extending legs 244. Preferably, the U-shaped bracket is formed of steel.
Above the U-shaped bracket is a support plate 246 of extruded aluminum, having an upper surface 248 and a pair of upwardly extending lips 250, one at each side of the upper surface 248. The width of the plate 246 is greater than the width between legs 244 of the U-shaped bracket 238. A pair of downwardly extending legs 252 is formed beneath the support plate 246 and depend therefrom, extending between the legs 244 of the U-shaped bracket 238.
The assembly of the support plate 246 to the bracket ~239~2~38 1 238 is by way of a pin 254 which extends through the holes 256 and 258 formed in the legs 244 of the U-shaped bracket 238 and the downwardly depending legs 252 of the support plate 246. The pin has a head 260 at one end thereof and is thread ably secured in place by a nut 262 and a washer 264 at the end. A split pin 266 may also be installed, as shown.
The support plate 246 and its depending legs 252 are rotatable mounted on the pin 254. The amount of rotation of the support plate 246 around the pin 254 is determined by the interference of the bottom of one or the other of the ends 253 of the depending legs 252 with the base 242 of the U-shaped bracket 238. This is accommodated by the fact that the distance that the lower edges of the legs 252 are below the pin is less than the distance that the upper side of the base 242 is below the pin, leaving a space 268 between them.
As the support plate rotates, there will be an interference of one of the ends 253 of legs 252 with the bracket 238.
The manner by which the stringer may be secured to the liftable stringer support is as follows. At least one hole, preferably a pair of holes 270, is formed and extend through the support plate 246 on the centre line thereof. Preferably also, a slot 272 is formed along the centre line of the support plate, with the holes 270 extending into the slot, one near each end thereof. A T-head bolt 274 may be secured within the slot 272, having a nut 276 which has a turning handle 278 welded thereto, threadedly engaged to the shank of the bolt 274. When it is desired that the stringer be secured to the stringer support, the bolt 274 is lifted upwardly so that its head 280, having a crosswise dimension which permits it to pass into the bolt slot 282 of the 34;2~3 1 stringer 235 and a lengthwise dimension which interferes with the shoulders 283 of bolt slot 282, is lifted into the bolt slot 282 and turned and thereafter the nut 276 is tightened on the bolt. The locked and unlocked positions of the bolt 274, nut 276 and handle 278 are shown at the left and right hand ends, respectively, of the elevation view of the liftable stringer support in Figure 20.
In the unlocked position, the head 280 of the bolt 274 lies entirely within the slot 272 and does not extend above the surface 248 of the support plate 246. Other flat bottom beams may, therefore, be accommodated by the liftable stringer support.
As an alternative embodiment to the liftable stringer support discussed above, the positions of the legs 244 of shopped bracket 238 and the downwardly depending legs 252 of the support plate 246 may be reversed. That is, the legs 252 may be placed outwardly of the legs 244. In that case, the limiting of rotation of the support plate 246 about the pin 254 comes as a result of the interference of the tops of the legs 244 within the underside of the support plate.
Returning to the leg 16 of Figure I it has a particular shape where the sidewalls 189 20, 22 and 24 each include a stepped portion which displaces the sidewall outwardly from the longitudinal axis 23 of the leg. The stepped portions increase the strength of each leg sidewall.
It has been found that such shape for the leg, albeit non-circular, is useful in supporting loads independently of the frame. The leg, in combination with jack screws, may be used as a jack post or a post shore in the concrete forming field. This is particularly desirable after the pouring ~Z~3~Z9~

1 structure has been removed and post shores are required to support the poured floor of concrete to withstand forces of material placed on the curing concrete. The shape of the leg is such that it is a compromise between the superior circular shape for load bearing capacity and the square shape which provides surfaces for mechanical connection The corrugations in the sidewalls, that is the stepped portions, lie principally within a circle drawn to contain the stepped sidewall portions. Thus the shape in section is relatively close to the shape of a circle. It has been found that this shape has load bearing capacities greater than a rectangular section and which may approximate those of a circular section.
In addition, to increase the strength of the leg 16 of Figure 3, the corner portions 32 are thickened so as to strengthen the corners and increase the load bearing capacity of the leg. Such thickened corner portions also resist damage to the leg, should the frame be dropped on sharp areas which could cause destiny of the leg corners.
The stepped portions of the leg sidewalls, as previously explained, accommodate fasteners used in securing the brace connectors to the leg. Such accommodation leaves the leg interior substantially unobstructed to permit insertion therein of staffs and extensions on the end caps and base plates. The staffs are so configured that their wing portions, such as 207 of Figure 18, fit within the corners 32 to provide a snug intermit without overly complicating the design of the staff portions.
The mechanical connection of a brace arrangement to legs of a frame substantially facilitates use of the frame in the field. Because the frame can be disassembled, it can be ~;~34z5~13 l shipped to various construction sites in a "knockdown" form.
When the units arrive at the site, the legs with brace arrangement may be assembled to provide complete frames.
This mechanical fastening aspect is also advantageous from the standpoint of repair, in that should one of the brace components or legs become damaged, the frame may be disassembled and the component replaced to renew the frame to its Lowe full capacity. This is a distinct advantage over aluminum frames which are presently being used in the field lo and which are commonly interconnected by welding. As is appreciated, welding of aluminum in the field is very difficult and almost impossible. Thus should a welded aluminum frame become damaged in the field, it cannot be repaired and has to be sent to the shop for repair or may have to be scrapped.
Depending upon the end use of the frame and supporting structures, its shape for the leg may be larger or smaller.
For example, when the frame is used in the concrete shoring trade, the leg is considerably larger in section that if the same leg were used for access scaffolding which has substantially lower load bearing requirements.
As to actual use of the shoring frames, the arrangement may be such that the distance between the longitudinal axes of the legs is normally set at 1.8 meters, although it may be less for example, 1.2 meters. The height of each frame leg may vary, although acceptable heights are in the range of 1.5 meters or 1.8 meters. The weight of the frames varies depending upon their use; however, with a 1.8 meter frame including slide lock assemblies, it weighs approximate 20 icilograms, whereas the weight of a 1.4 meter frame including I

1 lock assembly weighs approximately 18 kilograms. The frame capacity of the type shown in Figure 1, having the leg of Figure 2, determined on a three frame high assembly, is in excess of 6,800 kilograms per leg. That is, 13,600 kilograms per frame for a structure three frames high. This provides a safety factor of at least 2.5. the spacing between the frames as determined by the cross-brace members may be greater than the known standard steel welded frame. For example, for a normal height garage floor slab of approximately 2.5 meters having a thickness of 26 centimeters and a weight of approximately 730 kilograms per square meter, this can be supported by a minimum number of shoring frames, according to this invention, giving a supported area slab of approximately 6.4 square meters per leg. with prior welded steel frames, having a one meter width, a support ratio of 9.1 square meters per leg is required.
Another comparison which may be made is that a three frame high assembly having an overall height of nearly 6 teeters and an overall weight per tower three frames) of 60 kilograms and a frame width of 1.8 meters, has a comparable loading capacity per frame, as extra heavy-duty welded steel shoring frames having the same height, a width between frame legs of approximately 1.2 meters, and weighing approximately 160 kilograms. In other words, a lower weight frame, according to this invention, will support a greater area than the much heavier welded steel shoring frames which have been used in the past. Further, shoring frames, according to the present invention, may be stacked to shoring heights of 50 meters or more, where once again the weight of the shoring in place and the amount of handling to get the shoring in place SLUICE

1 are considerably less when compared to welded steel shoring frames previously known.
Although preferred embodiments of the invention have been described herein in detail, it will be understood by those skilled in art that variations may be made thereto without departing from the spirit of the invention or the scope of the appended claims.

Claims (48)

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

1. A man handable shoring frame for supporting vertical loads experienced in supporting poured in place concrete structures comprising a pair of spaced aluminum tubular legs each having a hollow core, said legs being vertically orientated and joined by a brace arrangement and a plurality of connector means for mechanically connecting said brace arrangement to said legs at connection locations, said brace arrangement being adapted to stabilize said legs when under load, each of said legs having spaced wall portions which are substantially symmetrical about a plane containing the longitudinal axes of said frame legs and which provide areas for mechanical connection of said connector means, as secured to portions of said brace arrangement, to said legs;
each said connector means being mechanically secured to said spaced wall portions at points spaced in said connector means and spaced in the length of the leg to oppose pivotal movement of said connector means in the plane and including at least portions of the connector means interior surface being adjacent at least corresponding portions of leg exterior surface between said spaced wall portions such that said brace arrangement and said connector means cooperate to maintain the spacing and vertical orientation of said legs when said shoring frame is under load, each connector means being mechanically secured to said leg by clamp type fasteners which engage the interior surface of said leg and the exterior surface of said respective connector, said clamp type fasteners being adapted to maintain the hollow core adjacent said connector means substantially unobstructed.

2. A frame of claim 1, wherein each of said connector means, straddles said leg and has a spaced pair of lug portions extending from said connector means and which overlie said spaced wall portions, said interior surface portions of said connector means being held adjacent said corresponding leg exterior portions by bolt fasteners connecting said lug portions to respective said spaced wall portions.

3. A frame of claim 1, wherein said spaced wall portions of said leg are stepped so as to displace areas of said stepped wall portions for mechanical connection of said connector means to said leg, outwardly of the leg longitudinal axis to accommodate securement means a portion of which is in the leg interior.

4. A frame of claim 1, wherein said spaced wall portions are recessed and adapted to receive and engage corresponding portions of fasteners used in fastening said connector means to said leg.

5. A frame of claim 1, wherein said frame leg is circular, said connector means having lug portions which provide an interior arcuate surface for mating fit with the circular exterior surface of said legs, as said connector straddles said leg, said lug portions being mechanically connected to said spaced wall portions of said leg on opposite sides of said plane.

6. A frame of claim 5 wherein said connector lugs are bolted to said leg as provided for by bolt holes located in said spaced wall portions.

7. A frame of claim 6 wherein a pair of bolt holes are provided in each said wall portion, said bolts being fastened to a plate located internally of said leg with threaded apertures aligned with said bolt holes, said plate being curved so as to matingly fit the curved interior surface of said leg.

8. A frame of claim 5, wherein said spaced wall portions are recessed and adapted to receive and engage corresponding portions of fasteners used in fastening said connector means to said leg.

9. A frame of claim 1, wherein said frame leg has a planar face with diverging wall portions which include said spaced wall portions, opposing sidewalls extending rearwardly from said divergent wall portions, said opposing sidewalls being interconnected by a rear wall portion.

10. A frame of claim 9, wherein said diverging wall portions include recessed portions adapted to receive and engage corresponding portions of fasteners used in fastening said connector means to said leg.

11. A frame of claim 9, wherein said diverging wall portions include stepped portions to displace said areas of mechanical connection outwardly of leg axis to accommodate securement means a portion of which engages the leg interior surface.

12. A frame of claim 1, wherein said leg has flat surface portions equally spaced on opposite sides of said plane, said connector means having flat interior surface portions which abut said leg flat surface portions with said connector means secured to said leg.

13. A frame of claim 1, wherein said leg has four sidewalls interconnected by four corner portions, two of said sidewalls opposing one another being symmetrical about said plane, said opposing sidewalls having opposing stepped wall portions which increase the strength of said opposing leg sidewalls and which provide said areas for mechanical connection of said connector means to said leg, at least portions of the leg exterior surface of the sidewall between said opposing sidewalls being adjacent corresponding portions of connector interior as connected to said leg.

14. A frame of claim 13, wherein all four sidewalls of said leg are stepped to increase the strength of such sidewalls.

15. A frame of claim 13, wherein said at least portions of leg exterior between said opposing sidewalls are symmetrical about said plane.

16. A frame of claim 15, wherein said sidewall between said opposing sidewalls is flat and symmetrical about said plane as containing said portions of leg exterior, said connector means having a flat surface for abutting said flat sidewall as connected to said leg.

17. A frame of claim 13, wherein said sidewall between said opposing sidewalls is stepped outwardly to provide a flat exterior surface which is symmetrical about said plane, said connector means having a flat surface for abutting said outwardly stepped wall portion as connected to said leg said opposing stepped wall portions being perpendicular to said flat exterior surface.

18. A frame of claim 17, wherein said connector means has spaced lug portions which extend out from said flat surface of said connector means, said lug portions being mechanically connected to said opposing stepped wall portions with said flat surface of said connector means abutting said flat exterior surface of said sidewall.

19. A frame of claim 18, wherein said opposing stepped wall portions are flat interiorly and exteriorly of said leg to facilitate mechanical connection of said lugs to said stepped wall portions.

20. A frame of claim 19, wherein said leg is extruded to provide said opposing stepped wall portions and said flat exterior surface along the length of said leg to enable connection of said connecting means at any desired position along said leg.

21. A frame of claim 20, wherein said four corner portions are thickened relative to the thickness of adjacent sidewalls.

22. A frame of claim 21, wherein said lugs of said connector means have flat parallel inner surfaces which are spaced apart sufficiently to be adjacent said opposing stepped wall portions.

23. A frame of claim 22, wherein said lugs are bolted to said opposing stepped wall portions by a pair of bolts for each wall portion, said bolts being threaded exteriorly into threaded devices located interiorly of said leg which are fixedly interconnected to one another.

24. A frame of claim 23, wherein said threaded devices are two threaded apertures formed in a plate, said apertures being aligned with holes formed in said opposing stepped wall portions and corresponding portions of said lugs of said connector means.

25. A frame of claim 23, wherein said brace arrangement comprises two parallel spaced cross-members and a diagonal brace member interconnecting said spaced cross-members, four connector means connecting the four ends of said spaced cross-members to said spaced legs.

26. A frame of claim 25, wherein brace cross-members are tubular, each of said connector means comprising a projection insertable within a corresponding end of said spaced tubular cross-members to locate said cross-member on said connector means and to which said cross-member is secured.

27. A frame of claim 26, wherein said projection on said connector means comprises two spaced plate portions which are of a height to permit insertion in the ends of said tubular cross-members which are rectagular in cross-section.

28. A frame of claim 27, wherein said diagonal member is tubular and has its end portions adapted to overlap corresponding ends of said spaced cross-members and being secured to said connector means.

29. A frame of claim 25, wherein said cross-members include a slotted area extending the length of each member for receiving and cooperating with a portion of a fastener means to facilitate mechanical connection of elements to said cross members.

30. A man handable shoring frame for supporting essentially vertical loads experienced in poured in place concrete structures, said shoring frame comprising a pair of spaced aluminum tubular legs vertically orientated and joined by a brace arrangement and means for mechanically fastening said brace arrangement to said legs with clamp type fastness, said brace arrangement being adapted to stabilize said legs when under load, each of said legs having a connection location formed of integral spaced parallel portions which extend outwardly of the leg wall away from its longitudinal axis and which are substantially symmetrical about a plane containing the longitudinal axes of said frame legs, said portions providing areas for cooperation with components of said brace arrangement, said fastening means mechanically fastening said components of said brace arrangement to said portion areas with which said components cooperate at points spaced in the length of the said connection location to oppose pivotal movement in the plane, said brace arrangement and said fastening means cooperating to maintain the spacing and vertical orientation of said legs when said shoring frame is under load.

31. A frame of claim 30, wherein each of said legs is formed of extruded aluminum.

32. A frame of claim 31, wherein said portions are spaced wall portions which are parallel to one another and parallel to said leg axis.

33. A frame of claim 32, wherein said spaced portions and said cooperating portion of the component of said brace arrangement overlap one another and are bolted together.

34. A bolted shoring frame for use in concrete forming structures, comprising: a pair of tubular frame legs, each of said frame legs having at least front and back faces and opposed side faces; opposed pairs of holes in the front and back faces near the top and bottom of each of said tubular frame legs; a pair of generally U-shaped connecting brackets for each said frame leg, each bracket having a pair of legs, and each bracket leg having a pair of holes therein adapted to the same spacing as any of said opposed pairs of holes; each said connecting bracket being adapted to fit across the front and back faces of one of said legs, and to be secured thereto by bolts passing through said holes in said front or back faces of said legs and the adjacent one of the legs of said U-shaped connecting bracket; each said connecting bracket having a pair of stubs having a spacing between them less than the spacing between the legs of the U, and extending in the opposite direction to the legs of the U; a pair of tubular horizontal braces, each having front, back and opposed top and bottom faces, secured between pairs of connecting brackets near the top and bottom of each of said pair of frame legs; and a tubular diagonal brace having front, back and opposed top and bottom faces, secured between the bottom connecting bracket on one of said frame legs and the top connecting bracket on the other of said frame legs.

35. A bolted shoring frame of claim 34, wherein said horizontal braces are secured near the ends thereof to the respective connecting bracket by a bolt passing through holes in said front and rear faces thereof and through holes in said pair of stubs of said respective connecting bracket, said diagonal brace being connected to said connecting bracket by said bolt.

36. A bolted shoring frame of claim 34, wherein said horizontal braces are secured near the ends thereof to the respective connecting bracket by a weld, said diagonal brace being bolted to said connector bracket.

37. A bolted shoring frame of claim 34, wherein said frame legs, said horizontal braces, said connecting brackets and said diagonal brace, are all formed of extruded aluminum.

38. A bolted shoring frame of claim 35 or 36, wherein said tubular frame legs are formed such that the inside surfaces of said front and back faces thereof are stepped forward and rearward, respectively, of the outer corner of said front and back faces, so as to permit clearance forward or rearward of said outer corners by bolt heads inside said frame legs of bolts extending outwardly through holes formed in said front and back faces.

39. A first frame and a second frame each frame as claimed in claim 35 or 36 further comprising a pair of frame connectors interconnecting said first and second frame in a stacked relationship each frame connector comprising a length of extruded tubular aluminum connector tube having a profile adapted to fit within said tubular frame legs, and a collar secured to said connector tube around the centre thereof; said collar being of dimension and profile so as to cause interference with the end of said frame legs and thereby to preclude intrusion of said collar within said tubular frame legs; the ends of said connector tubes on either side of said collar extending into the respective frame legs; and a pair of lock pins, one for each frame leg, each lock pin having a generally U-shaped configuration with two legs, one of each of said lock pin legs extending through holes in the front and back faces of said frame legs and through holes formed in said connector tubes, so that one lock pin leg is above and the other below said collar in each frame leg.

40. A bolted shoring frame of claim 35 or 36, further comprising end caps inserted in the topmost and bottommost ends of said frame legs; each said end cap having a base portion and a stub portion, where the stub portion is adapted for insertion into the frame leg, and the base portion is adapted for interference with the end of said frame legs; where said stub portion is welded to said base portion, and said stub portion and said base portion are each formed of extruded aluminum.

41. A bolted shoring frame of claim 35 or 36, further comprising aluminum base plate assemblies inserted in the bottommost ends of said frame legs; each said base plate assembly having a base portion and a stub portion, where the stub portion is adapted for insertion into the frame leg, and the base portion is adapted for interference with the end of said frame legs; where said stub portion is welded to said base portion, and said stub portion and said base portion are each formed of extruded aluminum.

42. A bolted shoring frame of claim 35, wherein at least a pair of cross-brace lock assemblies are located on each frame leg, near the top and bottom thereof on said side face, said lock assembly comprising a slide, a U-shaped base and a post, said post securing said base against said side face to define a sleeve, said slide having a closed slot to accommodate said post as said slide is slid within said sleeve, said slide having means for capturing cross-brace ends which are connected to said post when in a first position and for releasing such captured cross brace ends when slid to a second position.

43. A bolted shoring frame of claim 42, wherein said slide has a transverse portion outwardly extending from a portion which slides within said sleeve and a depending front portion, said front portion having an open ended slot wich accommodates said post when said slide is in said first position to thereby capture said cross-brace ends on said post and permit said slide to move to said second position with the free end of said front portion sufficiently clear of said post to permit removal of such cross-brace ends off of said post.

44. A shoring frame for supporting essentially vertical loads comprising a pair of spaced aluminum tubular legs vertically orientated and joined by brace arrangement and means for mechanically connecting said brace arrangement to said legs, said brace arrangement being adapted to stabilize said legs when under load and including securing brackets each of which straddles one of said legs and cooperates with said mechanical connecting means to secure said legs and brace arrangement; each of said legs having spaced wall portions which are substantially symmetrical about a plane containing the longitudinal axis of said frame legs and which provide areas for mechanical connection of said brackets to said legs, each of said brackets straddling one of said legs for connection to said spaced wall portions with at least portions of the interior surface of said bracket being adjacent at least corresponding portions of the exterior surface of said one leg between said spaced wall portions, each of said spaced wall portions having a cross section defining a recess for receiving a portion of said mechanical connecting means, said brace arrangement and said connecting means cooperating to maintain the spacing and vertical orientation of said legs when said shoring frame is under load, said mechanical connecting means cooperating with said recess of said legs to maintain the interior of said leg substantially unobstructed.

45. A frame of claim 44, wherein each of said brackets, as it straddles said leg, has a spaced pair of lug portions extending from said brace arrangement and which overlie said spaced wall portions, said interior surface portions of said connector means being held adjacent said corresponding leg exterior portions by said means for mechanically connecting which secure said lug portions and the respective spaced wall portions.

46. A frame of claim 44, wherein said spaced wall portions of said leg are stepped so as to displace areas of said stepped wall portions and define said recess therein interior to said leg, said stepped wall portions providing for mechanical connection of said connector means to said leg, outwardly of the leg longitudinal axis.

47. A frame of claim 44, wherein said spaced wall portions are stepped outwardly to define said recess interior to said leg, said recess being adapted to receive and engage corresponding portions of said mechanically connecting means in a non-rotatable manner with respect to an axis generally perpendicular to the respective spaced wall portion.

48. In a shoring frame for supporting generally vertical loads experienced in cast in place poured concrete structures, the shoring frame having a pair of tubular legs formed of a light weight high strength extrudable material, said legs being separated by a brace arrangement with mechanical connections securing said brace arrangement to said legs;
each leg including opposed faces either side of the longitudinal axis of the leg and extending in the length of said leg;

each mechanical connection including a connector having spaced opposed engaging faces shaped to cooperate with said opposed faces of an associated leg in a manner such that the opposed faces of said legs are in close overlapping contact with the engaging faces of said connector;
and bolt fasteners spaced in the length of said leg cooperating with paired holes in each opposed engaging face of said connector and paired holes in each opposed face of said associated leg said holes in said faces being located to cooperate with said bolt fasteners and oppose pivotal movement of said connector in the plane of said legs and brace arrangement, and said bolt fasteners applying a tightening pressure between overlapping faces bringing the same into contact, said bolt fasteners cooperating with said legs to leave the centre of said legs substantially unobstructed.