US2702422A - Concrete wall form - Google Patents

Description

Feb. 22, 1955 A. H. SYMONS CONCRETE WALL FORM 5 Sheets-Sheet 1 Filed July 24, 1952 Feb. 22, 1955 SYMONS 2,702,422

CONCRETE WALL FORM Filed y 24, 1952 3 Sheets-Sheet 2 u rZzzzr/ mozzs. 4 WW 62$ Feb. 22, 1955 Filed July 24, 1952 5 Sheets-Sheet 3 United States Patent CONCRETE WALL FORM Arthur H. Symons, Chicago, Ill., assignor to Symons [Clamp & Mfg. Co., Chicago, 111., a corporation of "Illinois Application July 24, 1952, Serial No. 300,689

9 Claims. (Cl. 25*131) 'The present invention relates generally to wall forms.

More particularly the invention relates to that type of wall form which is adapted for use in the formation of a concrete wall and comprises: (1) a series of upstanding edge to edge panels in the form of rectangular plywood facings'. and rectangular reenforcing frames on the marginal portions of the outer surfaces of the facing; (2) a second series of similar upstanding panels in opposed and spaced apart relation with the panels of the first series; (3) horizontally positioned combined tie and spreader members which extend between the two series of panels and have apertured ends that fit between, and are disposed in horizontal notches in, the side pieces of the reenforcing frames of the panels; (4) head and shank variety bolts which extend through the apertured ends ofthe combined tie and spreader members and registering holes in the notched portions of the side pieces of the panel frames and have longitudinal slots in the free ends" of their shanks; and (5) wedges which extend through the slots in the'free ends of the bolt shanks and when driven tightly into place coact with the bolts to connect the panels to the ends of the combined tie and spreader members and also to clamp the panels together in edge to edge relation.

' In a concrete wall form of the aforementioned type it has heretofore been customary to form the side and top pieces of the rectangular reenforcing frames of the panels of wooden beams of rectangular cross section and to employ as parts of the frames vertically spaced, horizontally extending crosspieces which are formed of wooden beams of'the same cross sectional size as the wooden beams constituting the side and end pieces, have the ends thereof in abutting and connected relation with the side pieces of the'frames and serve to reenforce the central portions of the plywood facings against outward bulging or deflection in connection with use of the form. If the rec'- tangular reenforcing frames of 'the panels employ crosspieces of the aforementioned character it is necessary to form the notches for the apertured ends of the combined tie and spreader members and the registering holes for thebolts either above or below the ends of the wooden crosspieces. When the notches and holes are formed in the side pieces of the reenforcing frames either above or below the ends of the crosspieces the form as a'whole is subject to the objection that since the points er attachment of the apertured ends of the combined tie and spreader members to the side pieces of the reenforcing forms are vertically oflfset with respect to the ends of the crosspieces the load of the concrete between the two series of panels is not transmitted directly to the crosspieces and hence the latter do not serve uniformly to distribute the load throughout the panels.

One object of the invention is toprovide a concrete wall form which is an improvement upon, and obviates the aforesaid objection to, previously designed wall forms and is characterized by the fact that the crosspieces of the reenforcing frames of the panels are so designed and constructed that it is possible, by way of the bolts and Wedges, to attach the apertured ends of the combined tie and spreader members so that they are in horizontal alignment with the ends of the crosspieces and hence transmit the load of the concrete between the two series of panels to the crosspieces. Generally speaking, the crosspieces of the reenforcing frames of the panels are formed of metallic channel bars which are of materially less depth than the wooden side pieces of the frames, extend across, and fit directly against, the adjacentportions of the outer "ice surfaces of the panel facings, and have at the ends thereof outwardly extending right angle plates which fit against the inner side faces of the notched and hole equipped portions of the side pieces of the frames and have central holes in registry with the holes in the frame side pieces for receiving the shanks of the bolts.

Another object of the invention is to provide 'a con crete wall form of the aforementioned type and character in which the outwardly extending right angle plates at the ends of the metallic channel bars' that-constitute the crosspieces of the reenforcing frames of the panels are provided with integral parts which project at right angles to the plates and away'from the metallic channel bars, are arcuate in cross section, fit within the inner side portions of the bolt receiving holes in the wooden side pieces of the reenforcing frames and are adapted slidably go 1receive the inner side portions ofthe shanks of -the A further object of the invention is to provide a concrete wall form of the last mentioned character in which the integral parts of the outwardly extending right angle plates at the ends of the metallic channel bars are formed of the metallic stock which is punched or stampe'd from the'plates in connection with formation ofthe centrally disposed bolt receiving-holes therein.

- A still further object of the invention is to provide a concrete wall-form which is' generally of new-and improved construction, may be manufactured or fabricated at a comparatively low cost, effectively and efficiently fulfillsits intendedpurpose and, due to the-particular design and construction of the panels thereof, possesses extremely long life.

Other objects of the invention and the various advantages and characteristics of the present wall form will be apparent from a consideration of 'the following detailed description.

The invention consists in the several novel-features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

' Figure 1 is a perspective view of'aconcrete wall form embodying the invention;

Figure 2'is a fragmentary perspective view showing two panels in edge to edge relation and illustrating in detail the construction, design'and arrangement of the metallic channel bars that constitute the crosspieces of the reenforcing frames of the panels;

Figure 3 is a fragmentary perspective View like Figure 2 except that it is viewed from a different angle;

Figure 4 is a vertical section taken on the line 4-4 of Figure 2 and showing the manner in whichthe bolts and wedges coact to connect the panels to the ends of the combined tie and spreader members and also to clamp the panels together in edge to edge relation;

Figure 5 is a vertical section on the line 55 of Figure Figure 6 is "a vertical section on the line 66 of Figure Figure 7 is a vertical section illustrating in'detail the manner in which the integral arcuate parts of the plates at the ends of the metallic channel bars fit within the inner side portions of the bolt receiving holes in the side pieces of the reenforcing frames of the panels;

Figure 8 isa fragmentary perspective view of two of the metallic channel bars that constitute the crosspieces of the reen'forcing frames of the panels;

Figure 9 is a perspective of one of the head and shank variety bolts for anchoring or connecting the apertured ends of the combined tie and spreader members to the panels; and

Figure 10 is'a perspective view of one of the wedges which when driven into place coact with the bolts to connect the panels to the ends of the combined tie and spreader members and also to clamp the panels together in'edge to edge relation.

The wall form which'is shown in the drawingsiconstitutes the preferred form or embodiment of the invention. It is adapted for use in the formation of a concretewall (not shown) and comprises 'two similar series of upstandmg' edge to edge panels "11, combined tie and spreader members 12 for holding the two series of panels against relative lateral displacement, and bolts 13 and wedges 14 for connecting'the panels to the ends of the combined tie and spreader members and also holding the panels in edge to edge relation. The two series of panels are spaced apart a distance corresponding to the desired thickness of the concrete wall to be formed therebetween and are adapted to have concrete in plastic or fluid form poured between them for wall forming purposes. After setting or'hardening of the concrete and removal of the bolts and wedges the panels 11 are removed from the sides of the wall and the projecting ends of the combined tie and spreader members '12 are severed or broken at points or locations adjacent the sides of the concrete ,wall, as well understood in the art.

Thepanels 11 are exactly the same in size, design and construction and each consists of a rectangular facing 15 and a rectangular reenforcing frame 16. The facings 15 of the panels 11 are preferably formed of plywood, although, if desired, plain or regular wood may be employed; They are of uniform thickness throughout their entire areas and have truly flat inner and outer surfaces. By reason of the fact that the inner surfaces of the panel facings, i. c., the surfaces that face one another and engage the concrete in connection with use of the form, are flat, the sides of the concrete wall that is formed between the two series of panels are uniform and likewise flat. The frames 16 of the panels 11 serve to reenforce or strengthen the plywood facings 15. They are located directly outwards of the facings and consist of vertically extending side pieces 17, horizontally extending end pieces 18, and crosspieces 19. The side pieces 17 of the panel frames 16 are formed of wooden beams of rectangular cross section and fit against the side marginal portions of the outer surfaces of the panel facings 15. They are fixedly secured in place by screws, nails or otherattaching devices (not shown) and are so positioned or arranged that their outer side faces are flush with the side edges of the facings. As best shown in Figure 1 of the drawings, the outer side portions of the side pieces 17 of the frames are provided with horizontal full width notches 20 for receiving and accommodating the ends of the combined tie and spreader members 12. There are preferably two notches 20 in each'of the side pieces 17 and they are located equal distances from the ends of the side pieces. The side margins of the panel facings 15 are provided with notches 21 and these are aligned and in communication with the inner ends of the notches 20 and serve to accommodate the portions of the combined tie and spreader members that are directly inwards of the ends of such members. The side pieces 17 of the frame 16 are provided with transversely extending open ended circular holes 22 and these communicate with the central portions of the notches 20 and are adapted to receive the shanks of the bolts 13, as hereinafter described. The horizontally extending end pieces 18 of the reinforcing frames 16 of the panels are in the form of wooden beams and are the same in cross sectional size as the side pieces 17. They fit against, and are suitably rigidly secured to, the end marginal portions of the outer surfaces of the plywood facings '15 and are arranged and proportioned so that the outer side faces thereof are flush with the end margins of the facings and their ends are in abutment with the ends of the side pieces 17; The crosspieces 19 of the reenforcing frames 16 extend horizontally and constitute the essential novel feature of the form. They assist the end pieces 18 in reenforcing the plywood facings 15 against outward bulging or deflection during use of the 1 form forwall forming purposes and consist of metallic channel bars 23 and outwardly extending plates 24 at the ends of the channel bars. Each panel 11 is preferably provided with two crosspieces 19 and these are in horizontal alignment with the notches 20 and the transversely extending open ended holes 22 in the side pieces 17 of the frame of the panel. The metallic channel bars 23 that constitute the crosspieces 19 are of materially less depth thanthe side and end pieces 17 and 18 of the frames 16 and consist of vertically extending intermediate webs 25 and inwardly and horizontally extending integral side flanges 26 along the side margins of the intermediate webs 25. The length and arrangement. of the channel bars 23 are such that the ends of the bars abut against the inner side faces of the side pieces 17 and the'free side edges of the flanges '26 abut against the adjacent portions of the outer surfaces of the plywood facings 15. The channel bars are fixedly secured in place by horizontally extending rivets 27 which extend through holes 28 in the intermediate webs 25 of the bars and horizontally aligned'holes (not shown) in the plywood facings 15. Preferably the depth of the metallic channel bars 23 is less than half-that of the side and end pieces of the frame 16. The outwardlyextending plates 24 of the crosspieces 19 are flat and abut against the inner side faces of the side pieces 17. They project above and below the metallic channel bars 23' and have the central portions of the inner side margins thereof joined to, and formed integrally with, the end margins of the vertically extending intermediate webs 25 of the channel bars. Horizontal screws 29 extend through holes 30 in the end portions of the plates 24 and into the frame side pieces 17 and serve fixedly to connect the plates 24 to the frame side pieces. As shown in the drawings, the plates 24 extend at right angles to the channel bars 23. The central portions of the plates 24 are provided with rectangular holes 31 and these are in registry with the transversely extending open ended holes 22 in the frame side pieces and are adapted to receive the shanks ofthe bolts 13 as hereinafter described. The plates 24 are provided on the central portions thereof with integral parts 32 which project at right angles to the plates and away from the metallic channel bars 23, are arcuate in cross section, fit within the inner side portions of the bolt re:

ceiving holes 22 in the wooden side pieces 17 'of the reenforcing frames, and are adapted slidably to receive the inner side portions of the shanks of the bolts '13. These parts are joined'to the portionsof the bolts 24 that define the inner ends of the rectangular holes 31 and are formed of the metallic stock which is punched or stamped from the plates 24 in connection with formation of the holes 31. They are shaped conformably to, and fit 'flatly against, the inner side portions of the holes 22 and coact with the rivets 27 and the screws 29 to hold the frame crosspieces 19. against vertical displacement with respect to the plywood facings 15 and the side pieces 17 of the frames. It is contemplated that the frame crosspieces 19 will be formed of one-piece metallic stampings. The plates 24 are preferably of. such width that the outer side edges thereof are flush with the outer side edges of the frame side pieces 17.

The combined tie and spreader members 12 extend horizontally between the two opposed, spaced apart series "of panels 11. They are preferably formed of steel rods the combined tie and spreader members 12 are positioned in the horizontally extending notches 20 in the outer side faces of the vertically extending side pieces 17 of the panel frames 16 and the members are manipulated relatively to the panels so that the apertures 34 register with the transversely extending holes 22. When the combined tie and spreader members 12 are manipulated into place the portions of the members that are directly inwards of the loops 33 are disposed within the notches 21 in the side margins of the plywood facings 15.

The bolts'13 embody fiat tapered shanks 35 and integral right angle heads 36 at the large ends of the shanks. The shanks of the bolts are adapted to extend through the apertures 34 in the closed loops 33 at the ends of the combined tie and spreader members-12 and also through the transversely extending holes 22 in the frame side pieces 17 and the centrally disposed holes 31in the plates 24 of the frame crosspieces 19. In assembling the wall form the panels are positioned in edge to edgerelation and then the combined tie and spreader members are manipulated so as properly to dispose the loops 33 in the notches 20. Thereafterthe bolts are shifted into their operative position by inserting the shanks 35 through the holes 31 and '22 andthe apertures 34 andthen driving the bolts in' the direction of the small ends of the shanks until the heads 36 thereof are brought into engagement with certain of the plates 24, as shown in the drawings. The small or free ends of the shanks of the bolts 13 are provided with longitudinally extending slots 37.

The wedges 14 are formed of comparatively heavy stamped metal and are adapted to fit within, and extend through, the slots- 37in the small ends of the shanks'of the bolts 13. against certain of the plates 24 and serve to hold the bolts against longitudinal displacement. The bolts and t wedges coact to connect the panels to the ends of the combined tie and spreader members 12 and also to clamp the panels together in edge to edge relation.

In assembling the form the panels 11 are positioned in two opposed,,spaced apart series, as heretofore pointed out. Thereafter the loops 33 at the ends of the combined tie and spreader members 12 are positioned in the notches 20 andare arranged so that the apertures 34 are in registry with the holes 22. After proper manipulation of the combined tie and spreader members the. bolts 13 are inserted into place and then the wedges 14 are driven through the slots 37 in the shanks of the bolts. As soon as the form is assembled concrete in plastic or fiuid form is poured into the. space between the two series of panels. Upon hardening or solidifying of the concrete the panels are dismantled by removing the wedges 14 from the bolts 13 and then sliding the bolts lengthwise in the direction of their heads 36., As soon as the wedges and bolts are removed the panels are free and hence may be removed by .shifting them away from the sides of the wall. Afterremoval of the panels from the sides of the wall the projecting loop equipped ends of the combined tie and spreadermembers 12 are severed or broken adjacent the sides of the wall..

The herein described concrete wall form effectively and efiiciently fulfills its intended purpose and is characterized by the fact that the crosspieces 19 of the reenforcing .frames of the panels are so designed, constructed and located thatit is possible by way of the bolts and wedges to attach the apertured ends of the combined tie and spreader.mernbers so that they are in horizontal alignment with the ends of the crosspieces and hence, when the form is in use, transmit the load of the concrete to the crosspieces. The crosspieces serve effectively to reenforce the central portions of the plywood facings against outward bulging or deflection and, due to their particular construction or design, impart long life to the panels. The flat outwardly extending rightangle plates 24 at the ends of the crosspieces 19 form solid, nonwearing abutments for the bolt heads 36 and the wedges 14 and prevent the crosspieces from tilting up or down. The integral arcuate parts 32 of the plates form solid nonwearing abutments for the inner side portions of the shanks 35 of the bolts and, as previously pointed out, coact with the rivets 27 and the screws 29 to retain the frame crosspieces 19 in place. In view of the particular design and construction of the frame crosspieces 19 the form as a whole may be produced at a comparatively low cost.

The invention is not to be understood as restricted to the details set forth since these may be modified within the scope of the appended claims without departing from the spirit and scope of the invention.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. As a new article of manufacture, a panel adapted to be placed in an upstanding position and in edge to edge relation with like panels for the purpose of forrning part of a concrete wall form and comprising a flat rectangular facing and a rectangular panel-reenforcing frame disposed adjacent the outer surface of thefacing and consisting of a pair of vertically extending side pieces fitting against the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches for receiving certain apertured ends of combined tie and spreader members, and having transverse open ended holes in intersecting relation with the notches and adapted to receive bolts that extend through said apertured ends of said combined tie and spreader members, a pair of horizontally extending end pieces fitting against the end marginal portions of the outer surface of the facing and having the ends thereof disposed adjacent the ends of said side pieces, and a horizontally extending crosspiece disposed between the end pieces and in horizontal alignment with the notches and holes in the side pieces and embodying a bar of materially less depth than the side pieces, fitting against the adjacent portion of the outer surface of the facing, said crosspiece also embodying flat plate-like elements which are associated with, and extending outwards from, the ends of the bar, fit against the inner side faces of the hole-equipped portions of the frame side pieces, and are provided with centrally dis- ,When driven into placethe wedges 14 bear posed holes in registry withthe inner ends of the ,afor,

mentioned holes and adapted to receive said bolts.

2. As anewarticle of manufacture, a panel adapted to be placed in an upstanding position and in edge to edge relation with like panels for the purpose of forming part of a concrete wall form and comprising a flat rectangular facing and a rectangular panel-reenforcing frame disposed ad acent theouter surface of the facing-and consisting of a pair of vertically extending side pieces, of rectangular cross section, fitting against, and secured v to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notchesfor receiving certain apertured ends of combined tie and spreader members, and having transverse open ended holes in intersecting relation with the notches and adapted to receive bolts that extend through said apertured'ends of said combined tie and spreader members, a pair of horizontally extending end pieces of the ,same cross section as the side pieces, fitting against, and secured to,

the end marginal portions of the outersurface of thefacing and having the ends thereof in abutment with the ends of said side pieces, and a horizontally extending posed holesin registry with the inner ends of the aforementioned holes and adapted to receive said bolts.

3. As a new article of manufacture, .a panel adapted to be placed in an upstanding position and in edge to edge relation with like panels for the purpose of forming part of a concrete wall form and comprising a fiat rectangular facing and a rectangular panel-reenforcing frame disposed adjacent the outer'surface of the facing and consisting of a pair of vertically extending wooden side pieces of rectangular cross section, fitting against, and secured to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches for receiving certain apertured ends of combined tie and spreader.

members, and having transverse open ended holes in intersecting relation with thenotches and adapted to receive bolts that extend through said apertured ends of said combined tie and spreader members, a pair of horizontally extendingwooden end pieces of the same cross section as the side pieces, fitting against, and secured to, the end marginal portions of the outer surface of the facing and having the ends thereof disposed adjacent the ends of said side members, and a horizontally extending crosspiece disposed between the end pieces and in horizontal alignment with the notches and holes in the side pieces and embodying a metallic channel bar of materially less depth than the side and end pieces, fitting against the H adjacent portion of the outer surface of the facing, and consisting of an intermediate web and spaced apart side flanges, said crosspiece also embodying flat plates connected to, and extending outwards at right angles from, the ends of the web, fitting against the inner side faces of the hole-equipped portions of the side pieces and provided with centrally disposed holes in registry with the inner ends of the aforementioned holes and adapted to receive said bolts.

4. As a new article of manufacture, a panel adapted to be placed in an upstanding position and in edge to edge relation with like panels for the purpose of forming part of a concrete wall form and comprising a flat rectangular facing and a rectangular panel-reenforcing frame disposed adjacent the outer surface of the facing and consisting of a pair of vertically extending side pieces of rectangular cross section, fitting against, and secured to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches for receiving certain apertured ends of combined tie and spreader members, and having transverse open ended holes in intersecting relation with the notches and adapted to receive bolts that extend through said apertured ends of said combined tie and spreader members, a pair of horizontally V e t-endi g end pieces fitting against, and secured to, he end margifiaLpOr'tiQnS of the outer surface of th'ej facing and having the ends thereof in abutment withfth en'ds ofsaldsrde pieces, and a Horizontally extending" crosspte'ce, disposed between the ii pieces andin horizontal alignment with the notches and notes in the s'idepieces and embodying. avmetallic' channel hat of materially less depth ,t hafi the side pieces, fitting against, and s'ecur'dto, the ad acentpdftit jh ofthe outf surface of the facing, consrstmg of an intermediate web a d, spaced apart side flanges, and arranged so that the we is, spaced outwards of the outer surface of the facing and the side, flanges thereof project in the direction of and abut against saidouter surface of the facing, said crosspiece also embodylng flat plates connected to, and extending outwards at right angles from, the ends of the Web, fitting against, and secured to, the inner side faces of the hole-equipped portions of the side pieces and provided with centrally disposed holes in registry with the inner ends of the aforementioned holes and adapted to receive said bolts.

5. As a new article of manufacture, a panel adapted to be placed in an upstanding position and in edge to edge retanonwnh like panels for the purpose of forming part of a concrete wall form and comprising a flat rectangular facing; and a rectangular panel-reenforcing frame disposed ad acent the outer surface of the facing and consisting of apart of vertically extending pieces of rectangular cross section, fitting against, and secured to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches for receiving certain apertured ends of combined tie and spreader members, and having transverse open ended holes in intersecting relation with the notches and adapted to receive bolts that extend through said apertured ends of said combined tie and spreader members, a pair of horizontally extending end pieces fitting against, and secured to, the end marginal portions of the outer surface of the facing and having the ends thereof d1sposed adjacent the ends of said side pieces, and a horizontally extending crosspiece disposed between the end pieces and in horizontal alignment with the notches and holes in the side pieces and embodying a bar of materially less depth than the side pieces, fitting against the adjacent portion of the outer surface of the facing, said crosspiece also embodying fiat metallic plates which are associated with, and extend outwards at right angles from, the ends of the bar, fit against the inner side faces of the hole-equipped portions of the side pieces, are provided with centrally disposed holes in registry with the inner ends of the first mentioned holes for receiving said bolts, and have adjacent the holes therein integral laterally extending parts disposed in the inner side portions of sardflrst mentioned holes and adapted to be engaged by the inner side portions of the bolts when the latter are in place. a

6; As a new article of manufacture, a panel adapted to be placed in an'upstanding position and in edge to edge relation with'like panels for the purpose of forming parts of a concrete wall form and comprising a flat rectangular facing and a rectangular panel-reenforcing frame disposed adjacent the outer surface of the facing and consisting of a pair of vertically extending wooden side pieces of rectangular cross section, fitting against, and secured to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches for receiving certain apertured ends of combined tie and spreader members and having transverse open ended holes in intersecting relation with the notches and adapted to receive bolts that extend through said apertured ends of said combined tie and spreader members, a pair of horizontally extending Wooden end pieces fitting against, and secured to, the end marginal portions of the outer surface of the facing and having the ends thereof in abutment with the ends ofsaid side pieces, and a horizontally extending crosspiece disposed between the end pieces and in horizontal alignment with the notches and holes in the side pieces andembodying a metallic channel bar of materially less depth than the side and end pieces, fitting against, and secured to, the adjacent portion of the outer surface of the facing, and consisting of an intermediate Web'and spaced apart side flanges, said crosspiece also embodying flat metallic plates connected to, and extending outwards atlright angles from, the ends of the Web of the channel bar, fitting against the inner side faces of the centrally disposed holes in registry with the inner ends I of the first mentioned holes for receiving said bolts, and having adjacent the holes therein integral laterally extending parts disposed in, and shaped conformably to, the inner side portions of said first mentioned holes and adapted to be engaged by the inner side portions of the bolts when the latter are in their operative position.

7 As a new article of manufacture, a panel adapted to be placed in an upstanding position and in edge to edge relation with like panels for the purpose of forming part of a concrete wall form and comprising a flat rectangular plywood facing and a rectangular panel-reenforcing frame disposed adjacent the outer surface of the facing'and consisting of a pair of vertically extending wooden side pieces of rectangular cross section, fitting against, and secured to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches for receiving certain apertured ends of combined tie and spreader members, and

having transverse open ended circular holes in intersecting relation with the notches and adapted to receive bolts that extend through said apertured ends of said combined tie' and spreader members, a pair of horizontally extending wooden end pieces of the same cross section as the side pieces, fitting against, and secured to, the end marginal portions of the outer surface of the facing and having the ends thereof in abutment with the ends of said side pieces, and a horizontally extending crosspiece disposedbetween the end pieces andin horizontal alignment with the notches and holes in the side pieces and embodying a metallic channel bar of materially less depth than the side and end pieces, fitting against, and secured to, the adjacent portion of the outer surface of the facing, consisting of an intermediate Web and spaced apart side flanges, and arranged so that the web is spaced outwards from the outer surface of the facing and the side flanges thereof project in the direction of and abut against said facing, said outer surface of the crosspiece also embodying fiat metallic plates formed integrally With, and extending outwards at right angles from,-the ends of the web of the channel bar, fitting against, and secured to, the inner side faces of the hole-equipped portions of the side pieces, provided with centrally disposed holes in registry with the inner ends of the first mentioned holes for receiving said bolts, and having adjacent the inner portions of the holes therein laterally extending arcuate parts disposed in, and fitting directly against, the inner side portions of said first mentioned holes and adapted to be engaged by'the inner side portions of the bolts when the bolts are in their operative position.

8. A concrete wall'form comprising as its component a parts: a first series of upstanding panels arranged in edge to edge relation; a second series of upstanding panels arranged in edge to edge relation, positioned in opposed and spaced apart relation with the panels of the first series and each constructed like the others and comprising a flat rectangular facing and a rectangular panel-reenforcing frame I disposed adjacent the outer surface of the facing and consisting of a pair of vertically extending side pieces fitting against the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches, and having transverse open ended holes in intersecting relation with the notches, a pair of horizontally extending end piecesfitting against the end marginal portions of the outer surk face of the facing, and having the ends thereof disposed adjacent the ends of said side pieces, and a horizontally extending crosspiece disposed between the end pieces and in horizontal alignment with the notches and holes in the side pieces, embodying a bar of materially less depth than the side pieces and fitting against the adjacent portion of the outer surface of the facing, and also embodying fiat plate-like elements connected to, and extending outwards from, the ends of the bar, fitting against the inner side holes; horizontally extending head and shank variety bolts extending through the aperture in said other ends of the combined tie and spreader members, said first mentioned holes and the holes in the plate-like elements of the crosspieces, arranged so that the heads thereof are in abutment with certain of the plate-like elements and having longitudinal slots in the free ends of their shanks; and vertically extending wedges extending transversely through said slots, disposed in abutment with the other plate-like elements, and coacting with the bolts to clamp the panels of said second series in edge to edge relation.

9. A concrete wall form comprising as its component parts: a first series of upstanding panels arranged in edge to edge relation, a second series of upstanding panels arranged in edge to edge relation, positioned in opposed and spaced apart relation with the panels of the first series and each constructed like the others and comprising a flat rectangular facing and a rectangular panel-reenforcing frame disposed adjacent the outer surface of the facing and consisting of a pair of vertically extending wooden side pieces of rectangular cross section, fitting against, and secured to, the side marginal portions of the outer surface of the facing, embodying inwards of the ends thereof and in their outer side faces horizontal notches, and having transverse open ended holes in intersecting relation with the notches, a pair of horizontally extending wooden end pieces fitting against, and secured to, the end marginal portions of the outer surface of the facing and having the ends thereof disposed adjacent the ends of said side pieces, and a horizontally extending crosspiece disposed between the end pieces and in horizontal alignment with the notches and holes in said side pieces, embodying a metallic channel bar of materially less depth than the side pieces and fitting against the adjacent portion of the outer surface of the facing, and also embodying flat metallic plates connected to, and extending outwards at right angles from, the ends of the channel bar, fitting against the inner side faces of the hole equipped portions of the side pieces, provided with centrally disposed holes in registry with the inner ends of the first mentioned holes, and having adjacent the holes therein integral laterally extending parts disposed in the inner side portions of said first mentioned holes; horizontally disposed combined tie and spreader members extending between the first and second series of panels and having certain of the ends thereof connected to the panels of the first series and their other ends disposed in the notches in the side pieces of the panels of the second series and provided with apertures in alignment with said first mentioned series, horizontally disposed head and shank variety bolts extending through the apertures in said other ends of the combined tie and spreader members, said first mentioned holes and the holes in the metallic plates, arranged so that the heads thereof abut directly against certain of the plates, and having longitudinal slots in the free ends of their shanks, and vertically extending wedges extending transversely through the slots, disposed in abutting relation with the other bolts, and coacting with said bolts to clamp the panels of said second series in edge to edge relation.

References Cited in the file of this patent UNITED STATES PATENTS 1,129,144 Venable Feb. 23, 1915 1,970,547 Anderson Aug. 21, 1934 2,352,783 Geer July 4, 1944

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