US1813338A - Reenforcing truss - Google Patents

Description

July 7, 1931. c. B01-El. ET Al.

v REENFORCING TRUss Filed Aug. 4, 1930l 2 Sheets-Sheet l` Leon/lfau/L 5mm' Patented July 7, 1931 UNITED STATES CHARLES BOTEL AND LEON R. PAUL, F NET YORK, N. Y.

REENFORCING TRUSS Application led August 4., 1930. Serial No. 472,955.

This invention relates to a truss designed primarily for reenforcing floor forms used in the construction of concrete buildings and the like.

It is an object of the invention to provide a truss which can be easily set up and taken down and, when in position, will constitute an efficient reenforcement for the form so that it can support a heavy load.

A still further object is to provide a truss which can be litted to spans of any size between the supporting beams.

A still further object is to provide a truss which can be taken apart readily and stored in a small space when not in use.

Vith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed,it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings, the preferred forms of the invention have been shown. y

In said drawings:

Figure 1 is a front elevation of the truss applied to a form which is shown in section with the molded structure thereon.

Figure 2 is a section on line 2-2, Figure 1.

Figure 3 is a section on line 3 3, Figure l.

Figure 4f is a section on line 4 4, Figure 1.

Figure 5 is a plan view of one end portion of the truss.

Figure 6 is a plan View of the adjusting screw.

Figure 7 is a front elevation showing a modified form of the truss.

Figure 8 is a front elevation of one end portion of another form of device.

Figure 9 is a plan view of the structure 45 shown in Figure 8.

Referring to the figures by characters of reference, l designates a beam of any desired length adapted to be placed beneath the structural beams B between which the floor 50 form F is erected. This beam 1 is supported by means of stirrups 2 which are looped over the end portions thereof and have their upper ends 3 overlying and hooked into engagement with the beams B. The form F is erected on a series of beams 1 and each of these beams is provided with a truss structure such as constitutes the present invention.

A series of notches 4 is formed in the upper edge of the beam lnear each end and the beam can be reenforced adjacent to these notches by means of notched plates 5 bolted or otherwise attached to the sides thereof. Any one of the notches of each series is adapted to receive a bolt 6 which'connects the upper ends of links 7 extending downwardly at opposite sides of beam 1. The links are joined between their ends by a tie bolt 8 and pivotally mounted between the lower ends of the links is a draw rod 9.

Each of the rods 9 has its lower end detachably mounted at 10 to a coupling member 11 in the form of a` T-fitting. This coupling is engaged by a standard 12 which is screwed thereinto and is also screwed into the lower end of the yoke 13 adapted to straddle the lower edge of beam land to be held thereto by a nail 14 or the like driven through an opening provided in the yoke. The standard valve can be placed at any predetermined point on the beam.

'Seated in each coupling member 11 is an elongated screw 15. The two screws aline and are provided with laterally off-set heads 16 each of which has a longitudinal slot 17.

The heads 16 are lapped and are held together by bolts 18 or the like so that screws 15 are extended in opposite directions therefrom. The heads 16 and screws 15 form a turnbuckle and when the heads are rotated by means provided for that purpose the coupling members 11 will be drawn toward each other so as to pull through rods 9 on links 7 The standards 12 constitute struts for transmitting up-thrusts against the beam 1 and for receiving the weight of the load from the beam. Bolts 8 will of course bind against the bottom edge of beam 1 when the parts are tightened as described.

It will be understood that the structure can be removed readily from the beam, the several parts can be detached and compactly stored and the entire structure can be easily handled. When the truss is in place it acts as an efiicient reenforcement for the beam 1.A

Instead of providing a turnbuckle connection between the opposite end portions of the truss, a. structure such as shown in Figure 7 can be employed. In this modified form the coupling members 19 to which the rods 2O are connected have depending` portions 21 in each of which a screw 22 is slidably mounted. One of these screws has a chain 23 connected to it while the other screw has ak hook 24: detachably and adjustably engaged by the chain.

By providing the chain a quick adjustable connection between the members 19 can be effected and thereafter further adjustment can be had by Imeans of nuts 25 which, when screwed on to the bolts 22, will shift longitudinally.

Instead of providing the links 7 with bolts 6 adapted to be fitted in notches in beam 1 a modified arrangement such as shown in Figures 8 and 9 can be used. In this structure metal plates 26 are fastened to the sides of beam 27 and are provided with oppositely extending lugs 28. The links 29 have hooks 30 which engage the lugs.

TWhat is claimed ist.

1. A form truss including a beam, links detachably and adjustably connected to vthe end portions thereof, coupling members below the beam, draw rods connecting said members to the links, screw-threaded adjustable connections between the coupling members, means for attachment to the beam between its ends, and thrust transmitting standards interposed between and adjustably connected to the coupling members and said means.

2. A form truss including a beam, links adjustably and detachably connected to the beam, coupling members, draw rods connecting said members to the links, thrust receiving elements adjustably connected to and interposed between said members and the beam, and a turnbuckle connecting said members.

3. A form truss including a beam, links adjustably and detachably connected tothe beam, coupling members, draw rods connecting said members to the links, thrust receiving elements adjustably connected to and interposed between said members and the bea-m, threaded elements adjustably connected to the coupling members, and a chain detachably and adjustably connecting said elements.

In testimony that we claim the fore-going as our own, we have hereto affixed our signatures.

CHARLY BOTEL. LEON R. PAUL.

Images