US786289A - Concrete beam protection. - Google Patents

Description

No. 786,289. PATENTED APR. 4, 1905.

' A. L. A. HIMMBLWRIGHT.

CONCRETE BEAM PROTECTION.

APPLICATION FILED JULY 16, 1.903.

im E

Ikazi-v l UNITED STATES Patented April 4., 1905.

PATENT OEEICE.

ABRAHAM L. A. HIMMELWRIGHT, OF NEW YORK, N. Y., ASSIGNOR TO THE NEW JERSEY WIRE CLOTH COMPANY, OF TRENTON, NET JERSEY, A

CORPORATION OF NEIV JERSEY.

CONCRETE BEAM PROTECTION.

SPECIFICATION forming part of Letters Patent No. 786,289, dated April 4, 1905. Application filed July 16, 1903. Serial No. 165,787.

To all whom it may concern:

Be it known that I, ABRAHAM L. A. HIMMEL- WRIGHT, a citizen ofthe United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Concrete Beam Protection, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The object of the present invention is to provide an improved fireproof protection for the under side of beams in concrete floor constructions. It is now common in lireproof buildings to employ a layer of concrete on the I5 under side of the iron beams, which is filled in with and forms a vpart of the floor concrete. It has been found necessary in practice to provide some means for supporting this layer of concrete, and it has proven difficult to provide 2O such means which will efficiently support the concrete and at the same time permit the concrete to be filled in below the beams to the centering in such a manner as to form a solid integral layer of concrete. I have found that the desired result can be secured by the use of clips on the fianges of the beams provided with portions projecting downward into the layer of concrete and preferably hooked to give a greater support for the concrete. I have found that these clips may be placed at a considerable distance apart, so that the concrete can readily be worked down under the beam between and around the clips and as there is no metal construction below the beams except these separatedclips a solid continuous body of concrete thoroughly molded together may readily be formed, so that with such solid integral body of concrete the separated clips furnish sufiicient support.

The invention will now be described in connection with the accompanying drawings, forming a part of this specification, in which a construction embodying the invention in the preferred form is illustrated, and the features forming the invention will then be specifically pointed out in the claims.

In the drawings, Figure l is a section of a concrete floor transversely to the beams and showing the structure complete before removal of the centering. Fig. 2 is a cross-section of the structure shown in Fig. l with the centering removed. Fig. 3 is a detail section of the beam protection and a portion of the floor, showing also the plaster finish. Fig. 4 is a detail view of the form of clip shown in Figs. l to 3. Y

The beams A are the common flanged beams and the floor is shown as consisting of the ordinary web of concrete B, with bodies of concrete C extending downward along the webs of the beams and the beam protection of concrete D extending around and under the bottom flanges of the beams. The wooden centering E (shown in Fig. l) is the temporary wooden centering used to support the concrete while it is filled in and during setting and may be of any suitable construction. Theconcrete protection D for the lower ianges and bottom of the beams is supported by the clips F, placed on the beam-fianges at suitable distances, such as to permit the concrete to be worked under the beam and around the clips in filling in. These clips F may be of other forms than that shown, but in order to support the concrete must be provided with arms n projecting into the concrete, and these arms are preferably inclined outward or inward and may be hooked, so as to provide a better support for the concrete. The form of clip shown will be found very efcient and may be made cheaply from waste bits of metal. These clips consist of narrow metal plates, slit at their opposite ends, so as to provide a pair of arms l, which are bent upward over the flange of the beams to hold the clip in place, a pair of outwardly-inclined and hooked arms 2 and a pair of inwardly-inclined and hooked arms 3, which arms 2 3 are embedded in the concrete and strongly support the latter.

In building the construction shown the temporary centering E is first put in place, and the concrete protection for the lower iianges and bottom of the beams is first filled in, being worked by any suitable tool down into the space below the beam and around and between. the clips F, so as to form a solid integral body of concrete. A solid body ol: concrete surrounding and extending about the bottom iianges of the beams having thus been formed, the upper part C of the concrete about the beams is filled in and the rest of the structure completed as usual in such con struetions. After the concrete is set the temporary centering' E is removed, and the concrete may then be covered by a plaster iinish Gr, as shown in Fig'. 3, or the concrete may be lelt exposed, or a ceiling may be suspended below the beams, according to the character of the structure desired.

l/Vhat 1 claim is4 l. In a concrete Hoor or similar structure,

a beam protection consisting' of a body of con-v crete extending around and below the bottom iianges of the beams and supported solely by the beams and clips arranged at intervals on the flanges and provided with arms extending below the beams and embedded in the concrete, substantially as described.

2. ln a concrete lioor or similar structure, a beam protection consisting of a body of concrete extending around and below the bottom flanges of the beams and supported solely by the beams and clips arranged at intervals on the 'iianges and provided with inclined arms extending' below the beams and embedded in the concrete, substantially as described.

3.V ln a concrete ioor or similar structure, a beam protection consisting ot a body of concrete extending around and below the bottom flanges oi' the beams and supported solely by the beams and clips arranged at intervals on the llanges and provided with inclined hooked arms extending below the beams and embedded in the concrete, substantially as described.

It. In a concrete lioor or similarstrueture, a beam protection consisting' of a body of concrete extending' around and below the bottom flanges of the beams and supported solely by the beams and clips arranged at intervals on the iianges and provided with arms some ot' which are inclined downward and outward and others downward and inward from the beam flange and embedded in the concrete, substantially as described.

5. Beam-protection supporting-clip F provided with arms 1 for engaging the flange of the beam to hold the clip in place, and inclined arms 2, 3 on the opposite side of the clip from the arms 1, some of which inclined arms extend downward and outward and others downward and inward, substantially as described.

6. Beam-protection supporting-clip F provided with arms 1 for engaging the iiange of the beam to hold the clip in place, and inclined arms 2, 3 on the opposite side of the clip from the arms 1, said arms 2, 3 being. hooked at their ends, and some of said arms extending downward and outward and some downward and inward, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ABRAHAM L. A. lllMllllhhW HGHT.

W itncsses:

C. J. SAWYER, S. VINTHAL.

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