Патент USA US2116335код для вставки
May 3, 1938. G. B. Bosco WRÃPPING FOR STRUCTURAL SHAFES Filed June l' 1957 Il l. 0N / l 2,116,335 Patented May 3, 1938 2,116,335 UNITED NSTATES PATENT ` ` y ` oFFicE y 2,116,335 WRAPPiNG FOR STRUCTURAL sHAr-Es ` I ¿George B. Bosco, Chicago, Ill. Application Jane 1, 1937, serial N0. 145,733 7 Claims. (C1. 72ans) f lThis invention relates to reinforcing systems ï 5 for ‘concrete construction work and more particu to each other and secured to supporting chairs IIJ I which also serve as form spacers. larly to the ‘wrapping used in concrete ñreproof ing in connection with structural steel shapes, of uniform cross section which may vary in gauge Vsuch as girders, beams, joists and columns. 'I‘he main‘objects of this invention are to pro depending upon the requirements. ‘ vide an improved form of structural shape Wrap its ends may be wrapped around the edges of the adjacent flange of the I-beam and the extremi ping which is adapted to be completely assem bled together with the longitudinalv reinforcing rods- and attached to the soñit form before the mold is assembled thereby insuring accuracy in the placement of thaw-rapping; to provide a wrapping having improved ‘means for attaching ‘ the wrapping to the soflit form and for spacing the sofiìt form from the beam or other structural fshapeyto provide improved means for securing ßsaid‘form spacing and attaching means to the ‘transverse reinforcing wires of the wrapping; to provide improved means for attaching the wrap ping to the longitudinal reinforcing wires; and to provide an improved wrapping of this kind which is simple and comparatively inexpensive and which may be accurately placed in proper posi tion even by unskilled labor. ` An illustrative embodiment of this invention is i ties are looped as shown at II to minimize the danger of injury to the hands of the workmen in:< li) assembling the structure. In the form shown in Figures 1 and 2, the wrapping is used in connection with three longi tudinal reinforcing bars or rods I2, I3 and I4. The centrally located bar I2 rests on top of the cross rods 9 and is spot welded thereto. The outer rlongitudinal bars I3 and I4 are loosely sup ported in loops I5 which are formed in the cross rods 9. ' In the form shown in Figure 3, only a single longitudinal reinforcing bar I2.I is used and this is loosely supported in a loop I5.I of the cross rod 9.I. In the construction shown in Figure 4, `the sin gle longitudinal reinforcing bar |22 is spot Weld ed to the cross rod 9.2. The improved supporting and spacing chair I0 is preferably a sheet metal stamping which is bent to substantially U-shaped cross section, as illustrated in Figures 5 and 6. Formed on the lower edge, is a pair of prongs IE adapted to be 30 forced into the top surface of the sofût form. To prevent waste of material in the blanking . wrapping embedded in the concrete, the form not yet having been dismantledFigures 3 and 4 are fragmentary perspectives of alternate forms of wrapping. Figure 5 is an enlarged perspective of one of the improved spacers. Figure 6 is a fragmentary perspective of the spacer attached to a transverse reinforcing bar. In the construction shown, the improved wrap ping is applied to a structural steel I-beam or girder I which is ñreproofed with concrete 2 which is poured into the usual temporary form operation, these supporting and spacing chairs are stamped from strip- material so that 4the prongs of one chair are formed from the material of an adjacent chair, thereby leaving recesses I1 in the upper edges of each chair. If desired these recesses Il may support additional cross bars. Struck out from the chair, is a tapered lug I8 40 which forms a shoulder I9 on which the cross rod 9 is seated. After the cross rod has been port the usual sofñt form 4 and sides 5. The form sides 5 are usually nailed to the soñit form 4 and braced by vertical battens 6 which are in turn secured against outward movement by kick ers l'. The entire form is suspended from the dropped into its seat, the free'end of the lug I8 is bent over the rod as shown in Fig. 6, thereby iirmly securing the chair to the cross rod against 45 displacement crosswise of the latter. In operation, with this improved construction, the wrapping and reinforcing bars may be accu rately placed on the soñît of the form before the I-beam by any suitable means, such as the band mold is assembled. clamps 8. In the form shown, the improved wrapping sembled reinforcement is lifted into proper posi tion, the band clamps 8 are fastened and the ends of the cross bars S are then Wrapped around the bottom flange of the I-beam. After the concrete has set and the mold is dismantled, the prongs 65 comprising horizontal battens 3 arranged to sup ' [3 Cn Figure l is a fragmentary perspective of a beam mold showing a portion of one form of beam Figure 2 is a transverse section of a reinforced and iireproofed girder or beam with the improved 1 The cross rod B is of sufficient length so that ` shown in the accompanying drawing, wherein1--y wrapping. I The rods 9 are preferably formed of round Wire comprises a plurality of transverse reinforcing rods 9, of substantially identical construction, ci arranged in substantially parallel spaced relation After the sofñt and the as 2 10 2,116,335 I6 project beyond the face of the concrete but spectively attached to said transverse bars and these may be readily cut off if desired. adapted to have a bearing on both the structural It is obvious that this improved wrapping is equally well adapted for use in vertical columns. Although but certain specific embodiments of this invention have been herein shown and described, it will be understood that details of the construc shape and the form for spacing said transverse bars from both the shape and the form. 5. A` reinforcing wrapping for application to a. prising a plurality of laterally spaced flexible tion shown may be altered without departing from the spirit of the invention as defined by the transverse reinforcing bars each formed with a loop therein and adapted to lie between the struc following claims. I claim: 1. A reinforcing wrapping for application to a structural shape within a temporary form, com prising a transverse reinforcing bar adapted to 15 lie between the shape and one of the form sides, and a separately formed spacer locked to said transverse bar against displacement crosswise of the latter and having portions thereof adapted to contact the structural shape and the form for 20 spacing said bar from both the shape and the form. 2. A reinforcing wrapping for application to a structural `shape within a temporary form, com prising a transverse reinforcing bar adapted to 25 lie between the shape and one of the form sides, and a separately formed spacer locked to said transverse bar against displacement crosswise of the »latter and having its ends adapted to contact opposed surfaces of the structural shape and the 30 form for spacing said bar from both the shape and the form. 3. A structural shape wrapping, comprising a ,plurality of flexible transverse reinforcing bars `adapted to have their ends bent over a portion of 35 the structural shape, a longitudinal reinforcing rod secured to and spacing said transverse bars lengthwise of the structural shape, and spacing chairs attached to the respective transverse bars and provided with means for attachment to a 40 form. 4. A reinforcing wrapping for application to a structural shape within a temporary form, com prising a plurality of parallel transverse rein forcing bars adapted to lie between the shape 45 and one of the form sides, a longitudinal rein forcing rod secured to and spacing said trans verse bars, and separately formed spacers re structural shape within a temporary form com tural shape and one of the form sides, a longi 10 tudinal reinforcing rod overlying and attached to said transverse bars, another longitudinal rein forcing rod extending through the loops of said transverse bars, and a separately formed spacer attached to each transverse bar and adapted to 15 have a bearing on both the structural shape and the form for spacing said transverse bars from both the shape land the form. 6. A reinforcing wrapping for application to a structural shape within a temporary form com 20 prising a plurality of laterally spaced flexible transverse reinforcing bars each formed with a plurality of 4loops spaced lengthwise thereof and yadapted to lie between the structural shape and one of the form sides, a central longitudinal re inforcing rod overlying and attached to 'said 25 transverse bars, a plurality of longitudinal re inforcing rods respectively extending through the »loops of said transverse bars on opposite sides of said central rod, and a pair of separately 30 formed spacers attached to each transverse bar and adapted to have ~a bearing on opposed sur faces of the structural shape and the form for spacing said transverse bars from both the shape and the form. 35 '7. As a new `article of manufacture, a chair for supporting a transverse reinforcing bar and spacing the same from opposed surfaces of a structural shape and a temporary form, consist ing of a sheet metal stamping bent to substantially 40 U-shaped cross-section; said chair having squared ends, a flexible .struck-out lug on its con vex side adapted to seat and embrace said re inforcing bar, a pair of alined notches in its sides adapted to seat another reinforcing bar, and a pair of pointed prongs on one end. GEORGE B. BOSCO.