US1786522A - Form support - Google Patents

Description

F. G. DICKMAN FORM SUPPORT Dec. 30, 1930.

Filed Deo. 1o, 1.928

Patented Dec. 30, 1930 FRANK G. DICKMAN, OF CHICAGO, ILLINOIS FORM SUPPORT Application ned December 1e, 1928. serial N. 325,091.

My invention relates to an improved device adapted, as its initial function, to support the forms used for casting concrete f around metal beams for fire-proofing purposes.

These forms are commonly supported by means of a stirrup adapted to extend over the top of the beam, the legs of the stirrup projecting downwardly alongside of the flanges of the beam, and then passing through suitable apertures in the beam bottom or plank. These are suitable for the purposes but do not adapt themselves to different sizes of beams which necessitates furnishing a variety of sizes for the different beams in a specified structure.

An object of my invention is to provide a simple and economically constructed device that will adapt itself to beams of all sizes,

thus enabling the use of the same device for all the forms in a given job.

A further object is to lessen the initial cost and to simplify the operation of assembly of the forms. Inasmuch as the device of my invention is of relatively small size and requiring no machine work excepting threading the body for a standard bolt, thev initial cost is considerably less than that of the stirrup heretofore used; this is due to a reduction in the amount of material required. The operation of installation of the device of my invention is materially simplied due to the fact that the assembly takes place on the licor before the plank or beam bottom is elevated in place. After having been elevated, a few turns of a wrench serves to temporarily secure it in place.

. A further and important advantage is that the supporting device functions as an insert for the support of pipes, conduits, ceilings, etc. after the forms have been stripped. If, however, there is no occasion for the use of hangers, there are noprojecting parts that need to be cut olf, as in the case of the structures heretofore proposed.

The invention will be more readily understood by kreference to the accompanying drawings, in which Fig. 1 is a sectional view through a portion of a beam and the forms surrounding the same, the device of my invention being shown kin place F ig. 2 is a sectional view ,of the completed job, the concrete and the metal beam'being shown in section; and Fig. 3 is a perspective view of oneof the supporting lugs or bodies. i j j In the drawings, a beam of conventional form is shown, havingk a web andflanges 11. The wood form which encloses the beam vcomprises side members 12 and a beam bottom or plank 13. ycleatlt is arranged beneath ythe plank and the supporting 1bolts 15 extend through neat holes inV they cleat and plank, the upper threaded ends 16 of the bolts engaging in thethreaded portions or body 17 Aof the supporting device of my invention. Y rThis device is4 of elongated form being preferably substantially square at its lower end to facilitate engagement by wrench necessary, and symmetrically rounded at itsl upper and on its outer side. A toe or projection 18 extends laterally'from the upper end `of the body and isadapted to overlie and b esupported on a flange ll of the beam. The side 19 of the body is curved to facilitate rotation of the lug in` one direction relative to the flange of thebeam, while a lug or stop 20 on the body prevents rota-j tion in the opposite direction. If the body is providedk with a right handed threadl the lug will be placed on the side shown in the drawings, in order that the action of turning the bolt by the application of a wrench to ,4 the head thereof will rotate the device until .stopped by the lug, at which point the toe will be in proper position.

In operation, it being assumed that a plurality of nails 21 have been driven into the top surface of the beam bottom in order to act as separators, and the proper apertures having been provided in the plank and cleat, the bolts are inserted and the supporting device will be positioned with the toe 18 in a f position at least 90 degrees removed from the' final position. Then the parts are assembled as described the plank is raised and fitted beneath the beam. A wrench applied to the heads of the bolts will cause the supporting lugsto rotate as far as permitted by the stop CIJ 20, at which point the toes will overlie the flanges in the position shown. The plank may then be securely clamped in place by screwing the bolts tightly in place, the side boards applied and the concrete poured. After the concrete has set, the bolts may be backed out, the forms stripped., and the final structure will appear as shown in Fig. 2, in which condition the supporting lugs will always be available hanger inserts.

Obviously the exact form and arrangement need not be followed in order to secure satisfactory results, and I do not wish to be limited except as indicated in the appended claims. i

I claim:

1. A form support and insert comprising, in combination, a threaded body having a supporting projection adapted to rest-on the flange of a beam, means on said body permitting rotation in one direction and preventing rotation in the opposite direction relative to an adiacent beam flange, and a bolt adapted to project through the bottom board of a form and engage said threaded body, said bolt being adapted to be removed to drop the form after the concrete is poured the threaded body remaining in the concrete and acting as an insert for the support of conduits or of a ceiling.

2. In a device of the class described, the combination with a flanged beam and a bottom board of a form, of a threaded body having a toe adapted to rest on a beam flange, means `for spacing said board away from the bottom of the beam, means on said body permitting partial rotation in one direction and preventing rotation in the opposite direction relative to a beam flange, and a bolt Vprojecting through said board and engaging said threaded body, said bolt supporting the board during the placing of concrete and adapted for removal, leaving the body embedded in the concrete.

In testimony whereof I have affixed my signature.

c FRANK G. DICKMAN.

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