US787512A - Fireproof construction and method of making same. - Google Patents

Description

No. 787,512. PATENTED APR. 18, 1905.

APPLICATION FILED AUG. 10. 1904.

@XRD/Lapo@ I I l wuawtofo Z @51j l @Hoff/meg# n UNITED STATES Patented April 18, 1905.

PATENT OFFICE.

-ABRAHAM L. A. HIMMELIVRIGHT, OF NEV YORK, N. Y., ASSICTNOR TO THE NEI/V JERSEY VIRE CLOTH COMPANY, OF TRENTON, NEW JERSEY, A CORPORATION OF NEI/V JERSEY.

. FIREPROOF CONSTRUCTlON AND IVIETHOD OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 787,512, dated April 18, 1905.

l Application led'Angus 10,1904.. Serial No. 220,179.

T all whom, 711 party concern:

Be it known that I, ABRAHAM L. A. HIM- uELWRIGl-rr, acitizen of the United States, residing at New York, county of New York,

and State of New York, have invented certain new and useful Improvements in Fireproof Constructions and Methods of Making the Same, fully described and represented in the following specification tand the accomparO nying drawings, forming a part of the same.

The object of the present invention is to provide an improved iireproof protection for the lower portions and under sides or soflits of beams in concrete floor constructions and an I5 improved method of making the same.

It is now common in fireproof buildings to employ a layer of concrete on the under side of the iron beams, which is filled in with and forms a part of the iioor-concrete. It has 2o been found necessary in practice to provide some means for supporting,l this soft protection, and it has proven difiicult to provide such means which will efliciently-support the concrete, especially as it is impossible to tamp the concrete below the beams in sucha manner as to form the solid integral layer of concrete desired. "f Y l/V ith my im proved construction and method I provide a soflit protection consisting of a solid integral layer of plastic material, such as line concrete or cement, which is solidified by the pressure and tamping of the heavy concrete above, so that Yits particles are held firmly together and the whole beam protec- 55 tion quite strongly supported by the beamflange and the hold of the protection material upon the concrete above. While such support of this solid body may be found suicient, it is preferable to use also some form of metallic members embedded in the beam protection and supported by the beamflanges, and I preferably employ for this purpose clips placed along the beam-flanges at suitable distances to provide an efficient support, while at the same time permitting the material to pass freely between them to iill solidly the spaces around and below the beam-flanges, these clips being provided with arms which extend downward into the soiiit protection and are of such form as to give-the desired support. My improved construction and method of making the same will now be described in connection with the accompanying drawings, forming a part of this specification, in which the invention is illustrated asl applied in its preferred form, and the featuresforming the invention will then be specically pointed out in the claims. Y

In the drawings, Figure l is a section trans- Versely to the beams, showing the structure in process of making with the material of the soi-lit protection filled in. Fig. 2 is a similar section showing the concrete partially filled in above the soiit protection and tamped to solidify the latter. Fig. 3 shows the completed construction before removal of the centering. Fig. 4 is a sectional elevation longitudinally of the beams, showing one of the beams and its clips in elevation and the soiiit protection in section.

Referring to said drawings, A represen ts the beams, shown as of the common I form, and B the temporary centering, which is supported in any suitable manner for filling iii the concrete to form the floor. On the bottom iianges of the beams at suitable distances apartare placed protection supporting clips C, which are shown as having two hooked arms l 2 at each side ofthe beam, arms l eXtend- 8O ing downward and outward and arms 2 extending downward and inward, so as to give a strong support to the sofiit protection. The clips being in position and the centering erected, as shown in Figs. l to 3, the soiiit protection is first to be filled in. This consists of comparatively line concrete or similar strong plastic material D, which is preferably made from fine aggregates-for instance, so as to pass through a three-fourths-inch-mesh screenand made very Wet, so that it has about the consistency of ordinary cement mortar. This concrete is poured into the haunch along one side of the entire length of the beam until it flows under the beam and rises on the opposite side to the proper level, preferably to a little above the top of the beam-flange. Care must be taken that this thin concrete tills the space under and around the beam solidly, and the securing of this result may be assisted by tam ping with a small tamp, although thematerial will preferably be thin enough so as to fill the space completely without tamping. In Fig. 1 the construction is shown with the sofiitprotection material D filled in to the proper level on both beams A. Before the protection material D has set several inches of the regular Hoor-concrete are filled in above the material D on both sides oi' the beams, and this concrete is thoroughly tamped down on both sides of the beams. This crowds the soiiit-protection material closer together and packs it, so as to fill any small voids that might otherwise remain in it and assure the formation of a solid homogeneous body of the material D. This also forces the coarser particles of the concrete into the upper portion of the material D, so as to weld the two bodies of material together, which materially assists in supporting the soffit protection. In Fig. 2 the construction is shown with the layer of concrete E, just described, filled in and tamped upon the sofit protection D. The soiit protection thus having been formed and the concrete directly above it lilled in and tamped, the rest of the floor-concrete F is lilled in and tamped in the usual manner, forming the complete construction shown in Figs. 3 and 4, the centering B being removed after the concrete is set.

It will be understood that the invention is applicable not only in connection with beams of the common I form shown, but also in connection with beams of other form. as well as todouble beams or girders. vln the case of beams without flanges angle-bars may be applied to form flanges if it be desired to use clips of the form shown in the drawings. or any other suitable means may be used to aid in supporting the soiiit protection.

Thile it is preferable to use clips or other devices embedded in the soflit protection to aid in supporting the latter and I prefer to use clips arranged at intervals on the beams, as shown, it will be understood that the in- Vention includes constructions in which the sofiit protection is supported solely by the beams and the concrete above, as such support of my improved soliit protection will be found sutiicient in many cases.

I/Vhat I claim is 1. In a concrete floor or similar structure, abeam protection consistingoic a body ot' comparatively tine concrete or similar material molded around and below the bottoms of the beams, in combination with a concrete floor of coarser' concrete a part of which is molded upon and into said beam protection.

2. In a concrete licor or similar structure, a beam protection consisting ot' a body of comparatively line concrete or similar material molded around and below the bottoms of the beams, in combination with a concrete floor ot' coarser concrete a part of which is molded upon and into said beam protection, and metallic supporting members carried by and eX- tending below the beams and embedded in the beam protection.

8. In a concrete floor or similar structure, a beam protection consisting of a body ot' comparatively fine concrete or similar material molded around and below the bottoms of the beams, in combination with a concrete floor oi' coarser concrete a part of which is molded upon and into said beam protection, and clips arranged at intervals on the flanges of the beams and provided with arms extending below the beams and embedded in the beam protection.

4. In a concrete licor or similar structure, a beam protection consisting of a body ot' comparatively fine concrete or similar material molded around and below the bottoms ot' the beams, in combination with a concrete iioor of coarser concrete a part of which is molded upon and into said beam protection, clips arranged at intervals on the ianges of the beams and provided with inclined hooked arms eX- tending below the beams and embedded in the beam protection.

5. The method of building concrete fiobrs or similar structures, which consists in pouring in thin concrete or similar material to iill thc space around and below the bottoms oi' the beams to the desired height, filling in a portion of the coarser iioor-concrete onto the thin concrete before the latter has set, and tam ping the coarser concrete into the thin concrete and then completing the tilling in of the Hoorconcrete.

6. The method of building concrete fioors or similar structures, which consists in placing at suitable intervals along the beams clips having supporting-arms extending below the beams, pouring in thin concrete or similar material to fill the space around and below the bottoms of the beams and clips to the desired height, filling in a portion ot' the coarser flooreoncrete onto the thin concrete before the latter has set, and tamping the coarser concrete into the thin concrete and then com pleting the lilling in of the ijoor-concrete.

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

ABRAHAM L. A. lilMlllllliWltlGllT.

Witnesses:

S. WvIN'ri-IAL, C. J. SAWYER.

IIO

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