Патент USA US2122276код для вставки
June 2s, 1938. ' ' G. B. Bosco ' 2,122,276 FORM HANGER FOR CONCRETE 'SLAB‘I STRUCTURES Filed Aug. 25, 1937 2 Sheets-Sheet . y ä l /2 / ~ l June 28, 1938. ^ G. B. Boscol ` 2,ì22,276 FORM HANGER FOR CONCRETE SLAB STRUCTURES Filed Aug. 23, 1937 2-Sheets-Sheet 2 r \\\\ \ \ 2,122,276 Patented June 28, 1938 UNITED STATES FFICE _PATET 2,122,276 FORM HANGER FOR CONCRETE SLAB STRUCTURES George B. Bosco, Chicago, Ill. Application August 23, 1937, Serial No. 160,464 9 Claims. This invention relates to hangers for suspend ing the temporary forms used in the construction of concrete slabs such as decks, floors, ceilings, and the like. « In such constructions, the concrete slab is usually supported by a plurality of horizontal permanent girders, beams, or joists which may be I-beams or other structural steel shapes. The temporary forms span the spaces between the 10 permanent beams and are suspended by hang ing l which is supported on a plurality of joists, beams, or girders 2, only one of which is shown herein. These horizontal beams are usually ar ranged in substantially parallel spaced relation, and the spaces between the horizontal beams are . G spanned by the temporary forms which are sus pended from thev beams by the improved hang ers. yoke adapted for mounting on top of the beam In the construction herein shown, the tempo rary forms comprise the usual decking 3 sup ported on horizontal joists 4 which are arranged in substantially parallel spaced relation and which are in turn supported by a plurality of pairs of stringers 5. The stríngers of each pair 15 and having improved Suspenders coupled to the through which the Suspenders of the improved ers which embrace the beams. The main objects of this invention are to pro vide a hanger for slab forms having an improved yoke and adapted to support the temporary forms; to provide improved supporting and spac ing chairs for supporting the yoke and for spac ing it from the top of the beam; to provide im 20 proved means for coupling the Suspenders to the yoke so as to permit the Suspenders to be removed from the embedded yoke after the con crete has set whereby the Suspenders may be used over and over again; and to provide an im~ 25 proved hanger of this kind which is sturdy and which may be quickly and accurately assembled and applied even by unskilled labor. Illustrative embodiments of this invention are are spaced apart so as to provide openings 6 » 15 hangers extend. Y ` In the construction shown in Figure 1, each of the improved hangers comprises a supporting yoke l’ supported on top of the beam and cou- ‘u pled at its ends to a pair of depending sus penders 8 which support the forms.~ In the constructions shown in Figures 1, 2, 3, 5 and 6, the yoke is not adjustable and com prises a single bar which is preferably round in . 25 cross-section and may be of any desired gauge which is sufficiently strong for the work in volved. The yoke bar is substantially U-shaped so as to provide depending arms 9 which- are externally threaded. These yokes are left em -30 30 in: Figure 1 is a vertical section of a building bedded in the concrete deck after the concrete structure showing one of the improved hangers; ‘ has set and, therefore, it is necessary to provide shown in the accompanying drawings, where Figure 2 is a perspective of the yoke part of the hanger shown in Figure 1; Figure 3 is a sectional detail of a hanger and 35 building structure showing a modified form of support and spacer for the yoke; Figure 4 is an enlarged section of the yoke and spacer, the view being taken on the line 4-4 40 of Figure 3; Figure 5 is a perspective of the yoke and spac ers shown in Figures 3 and 4; Figure 6 is a horizontal section taken on the line 6_6 of Figure 5; 45 Figure '7 is a view similar to Figure 1 but showing an adjustable yoke for accommodating beams of different widths; Figure 8 is a perspective of the adjustable yoke shown in Figure 7; and 50 Figure 9 is a perspective of one end of the ad justable yoke shown in Figure 8 and its attached supporting and spacing leg. In the construction herein shown, the im proved hangers are used in connection with the 55 construction of a concrete deck, iloor, or cei1- supporting and spacing means for raising the yokes above the lower surface of the deck. In the construction sho-wn in Figures 1 and 2, such l f supporting and spacing means comprises a pair of legs i0 which are preferably sheet metal stampings bent to substantially V-shape and being slightly longer than the depending arms 9 so as to raise the lower extremities of thc=I 40 arms 9 above the plane of the lower face of the deck. As shown in Figure 2, the upper ends of the'V-shaped legs il] are bent outwardly away from each other so as to provide flanges II- and I2. The flanges H are apertured so as to provide « 45 openings I3 through which the ends 9 of the yoke extend. The flanges I2 are permanently secured to the yoke bar by spot welding as shown at lll or by other suitable means. . In the construction shown in Figures 3, 4, 5 \ and 6, the supporting and spacing leg comprises a sheet metal stamping l5 of substantially in verted U-shape having strengthening ribs I6 in the leg portions thereof and having a depression Il in the cross portion thereof forming a seatr` 55 2 for the yoke bar. 2,122,276 The yoke bar may be Spot bedded in the slab after the concrete has set, legs welded to the legs I5 as shown at I8. In the construction shown in Figures ‘7 and 8, mounted on said yoke for supporting said yoke on the yoke portion of the hanger is adjustable widthwise so as to be adapted for use in connec tion with structural shapes of different widths. The adjustable yoke comprises a comparatively long bar I9 and a relatively short bar 20, the ends of which are bent to form arms 2| and 22, 10 respectively, which are externally threaded sim ilar to the arms 9. Attached to the outer end of the bar I8 is a supporting and spacing leg 23 which may be Similar in construction to the legs I0 or, if desired, may be similar in construction 15 to the legs I5. The other leg of the adjustable the beam and for spacing said yoke from the bottom face of the slab, a, pair of depending Sus penders threaded to the ends of Said yoke So as to be adapted for removal of the Suspenders after the concrete has set, and nuts on Said Suspenders for Supporting the forms. 2. A hanger adapted to suspend temporary forms from a beam in the construction of con crete slabs comprising a yoke adapted to remain embedded in the slab after the concrete has set, 10 yoke serves not only as a supporting and spacing leg but also serves as a coupling for slidably con said yoke being adjustable in width for straddling beams of various widths, legs attached to and depending from Said yoke for supporting said 15 yoke on and spaced above the beam, a pair of Suspenders -detachably coupled to the ends of necting the bars I9 and 20 together. As Shown in Figures 7, 8 and 9, this coupling comprises a said yoke so as to permit removal of Said sus penders after the concrete has Set, and means 20 substantially V-Shape-d Sheet metal stamping 24 on said Suspenders for supporting the forms. 3. A hanger adapted to suspend temporary having a pair of openings 25 formed therein for slidably receiving the bar I9 and having a pair of openings 25 formed therein for receiving the short bar 2G. Struck out from the leg 24 adjacent the openings 25, are lugs 2l which are Spot welded or otherwise rigidly secured to the bar 20. With this improved construction, the yoke may be ad justed as to width by merely sliding the leg 24 on the bar I 9. 30 forms from a beam in the construction of con crete slabs comprising a yoke adapted to remain embedded in the slab after the concrete has set, said yoke being extensible and retractable for accommodating beams of various widths, legs mounted on said yoke for supporting said yoke on the beam and for spacing said yoke from the bot tom face of the slab, a pair of depending sus penders threaded to the ends of said yoke so as to Each of the Suspenders 8 is preferably of Sub stantially the Same construction as the tie ele ment Shown in my Patent No. 2,061,751, issued the concrete has set, and nuts on said Suspenders November 24, 1936, and in my copending appli cation, Serial No. 151,582, ñled July 2, 1937. It for Supporting the forms. 4. A hanger adapted to suspend temporary be adapted for removal of the Suspenders after 35 comprises a bolt having a tapered head 28 and a forms from a beam in the construction of con iiat shank 2S. The tapered head 28 extends through an opening 3&1 in the decking 3 and has an internally threaded socket 3| for engagement with the threaded ends of the yoke. The shank 40 29 is of rectangular cross-section with threads 32 formed on only two of the opposed Sides there of. With this type of construction, a wrench may be easily applied to the ñat sides of the shank without injury to the threads. Engaging 45 the threaded portions of the Shanks 29 are wing crete slabs comprising a yoke of Substantially nuts 33 having bearing portions 34 for engaging the lower faces of the Stringers 5. In operation, the Suspenders are coupled to the yoke, and the yoke is then placed on top 50 of the beam with the Suspenders depending there from. The entire weight of the forms iS carried by the wing nuts 33, and these wing nuts may be readily adjusted for bringing the upper surface of the decking 3 to the required level which may 55 be either above, below, or in the plane of the upper surface of the beam. ~In dismantling the forms after the concrete has Set, the wing nuts 33 are removed so as to permit dropping of the form parts, and the sus 60 penders 8 are then unscrewed from the thread ed ends of the yokes. The holes left in the bo-t tom face of the concrete after the removal of the Suspenders 8 may be readily plugged with con crete. The yokes remain permanently embedded 65 in the concrete. Although but certain speciñc embodiments of this invention have been herein Shown and scribed, it will be understood that details of constructions shown may be altered without 70 parting from the spirit of the invention .as de the de de fined by the following claims: inverted U-Shape having down-turned threaded ends, legs for Supporting said yoke on the beam and spacing said yoke from the bottom face of the slab, a pair of depending Suspenders having 40 threaded engagement with the ends of said yoke to permit removal of. the Suspenders after the concrete has Set, and means on said Suspenders for supporting the forms. 5. A hanger adapted to suspend temporary 45 forms from a beam in the construction of con crete slabs comprising a yoke of substantially in verted U-Shape having threaded ends, means for Supporting Said yoke on the beam, said Support ing means being longer than Said yoke ends so as to position the extremities of said yoke above 50 the plane of the top of the beam, a pair of de pending suspenders having threaded engagement with the ends of said yoke to permit removal of. the Suspenders after the concrete has set, and 55 means on said Suspenders for Supporting the forms. 6. A hanger adapted to suspend temporary forms from a beam in the construction of con crete slabs comprising a yoke adapted to remain 60 embedded in the concrete and being of substan tially inverted U-shape with threaded ends, a pair of depending Suspenders at their upper ends threaded to the ends of said yoke and having threaded lower portions, and nuts on said lower 65 portions for supporting the forms, said nuts being vertically Shiftable for adjusting the forms either by the rotation of Said nuts relative to Said Suspenders or by the rotation of Said Sus penders relative to Said yoke. ` 7. A hanger adapted to suspend temporary I claim: forms from a beam in the construction of con 1. A hanger adapted to suspend temporary crete slabs comprising a yoke of> Substantially inverted U-shape adapted to remain embedded in forms from a beam in the construction of concrete 75 slabs comprising a yoke adapted to remain em 70 the concrete, means on the ends of said yoke for 75 2,122,276 supporting the forms, and a pair of supporting legs Welded to said yoke adjacent the ends thereof. 8. A hanger adapted to suspend temporary forms from a beam in the construction of con crete slabs comprising a yoke of substantially in verted U-shape adapted to remain embedded in the concrete, said yoke being in two sections slidably connected together to permit extension and contraction thereof, means on the ends of 10 said yoke for supporting the forms, and a sup porting leg mounted on said yoke and spot welded thereto. 3 9. A hanger adapted to suspend temporary forms from a beam in the construction of. con crete slabs comprising a yoke adapted to remain embedded in the concrete, said yoke being in two sections to permit extension and contraction thereof, a pair of supporting legs mounted on said yoke, one of said legs serving as a coupling for slidably connecting said sections together, and Suspenders on the ends of said yoke for support 10 ing the forms. GEORGE B. BOSCO.