US1938887A

US1938887A - Concrete floor structure

Info

Publication number: US1938887A
Application number: US532835A
Authority: US
Inventors: Howard F Young
Original assignee: LEONIE S YOUNG
Current assignee: LEONIE S YOUNG
Priority date: 1931-04-25
Filing date: 1931-04-25
Publication date: 1933-12-12
Anticipated expiration: 1950-12-12

Description

! u". 5*? Q:- 1 3. .31.8 H. F. YOUNG RETE FLOOR STRUCTURE r' n Merit 1851 CONC Filfied April 25, 1931 ATTORNEY S Patented Dec. 12, 1933 PATENT OFFICE UNITED STATES one-half to Leonie S. Young,

Mich.

Kalamazoo,

Application April 25, 1931. Serial No. 532,835

' 10 Claims.

The objects of the invention are:

First, to provide a simple and eiiective concrete floor which utilizes pre-cast concrete joists in its construction.

Second, to provide such a floor which is substantially monolithic in its effect.

Third, to provide an improved construction of girder connection with such floor.

Fourth, to provide an improved wall connection in such floor.

Fifth, to provide improved bridging in such a floor.

Objects pertaining to details and economies of construction and operation will appear from the description to follow. A preferred embodiment of my invention is illustrated in the accompanying drawing, in which:

Fig. 1 is an isometric fragmentary perspective view of a floor made in accordance with my invention, the floor slabbeing broken away to show details and the disposition and arrangement of the pre-cast joists being shown by dotted lines.

Fig. 2 is a detail transverse sectional View through one of the joists and the floor slab, showing the engagement of the joist and slab.

Fig. 3 is an enlarged detail end sectional view showing the invention as applied to a steel girder structure, the steel girder constituting in eifect the concrete reinforcement.

In the drawing, 1 indicates pre-cast joists made in the manner indicated in my concurrent patent application. 2 is a concrete girder having the usual reinforcement 21 or any form of reinforcement such as would be obtained by the use of a steel girder 22, see Fig. 3. The girder has the

extensions

23, 23 obliquely upward at each side between the said joists, the ends of the preformed joists projecting into the body of the said girder. The floor slab 4 is poured at the same time that the girder is poured and is monolithic with it and embraces the ends of the precast joists. A precisely similar wall support 3 is provided for engaging and supporting the ends of the joists on the wall. This consists of a main body portion 3 with upwardly inclined part 31 between the joists. The bridging consists of a transverse block 5 between the joists poured and formed integral with the floor slab. The floor slab 4 is formed with extensions 43 downward to embrace the head and form bond with the head of the joist 1. This has the effect of making substantially a monolithic structure, although the joists are pre-cast.

Reinforcement rods 41 are disposed in the floor slab parallel to the joists and over the top of the girders, extending about one-third of the joist span each side of the girder and afiording cantilever support to the joist and slab and providing continuity of the entire structure. Reinforcement rods 42 are continuous from joist to joist extending in suitably spaced relation over the entire floor slab.

This is the floor which is the result of the use of the improved forms and method referred to in my concurrent application. However, this structure can be produced by the use of the in vention described in my further concurrent application in which rib-lath are made use of in forming the base and support of a concrete floor. Whether the floor is formed by the molds or by the rib-lath method is immaterial, the results are substantially the same.

In Fig. 3 I show an I-beam girder 22 as the reinforcing member for the concrete, the pro-cast joists being made use of in the same way as in the method illustrated in Fig. 1.

When short joists are made use of the bridging 5 can be dispensed with. A very good floor can be produced without the extensions 43 embracing the top of the joists, but a very thorough bond is secured by these extensions, making a very strong construction and making it possible to use comparatively long joists without the use of the bridging. Bridging and that part can be made use of no matter how the ends of the joists are supported. 35

I desire to claim my invention specifically and broadly as pointed out in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A concrete floor formed with pre-cast joists having wall and girder supports having upwardly and laterally extending portions between the said joists and extending between the said joists and embracing the same, and a bridging formed between the upper parts of said joists, the floor slab being formed with extensions embracing the heads of the said joists, the said concrete being continuous and embracing the ends of said joists.

2. A concrete floor formed with pre-cast joists having wall and girder supports between the said joists and extending between the said joists and embracing the same, and a bridging formed between the upper parts of said joists, the floor slab being formed with extensions embracing the heads of the said joists, the said concrete being continuous and embracing the ends of said joists.

3. In a concrete floor structure, the combination of pre-cast joists, a girder with upwardly laterally extending portions, and a floor slab formed integral therewith, the concrete formation embracing the ends of the said joists.

4. In a concrete floor structure, the combination of pre-cast joists, a girder, and a floor slab formed integral with said girder, the concrete embracing the ends 01' the said joists.

5. A concrete floor structure formed of pre-cast joists with a floor slab having engaging extensions embracing each side of the head of the joists with a cement to cement bond therebetween.

6. A concrete floor construction consisting of pre-cast joists, a floor slab, and bridging between the said joists formed integral with the said floor slab.

7. A concrete floor formed with pre-cast joists having wall and girder supports having upwardly and laterally extending portiofis extending between the said joists and embracing the same, the floor slab being formed with extensions embracing the heads of the said joists, the said concrete being continuous and embracing the ends of said joists.

S. A concrete floor formed with pre-cast joists having wall and girder supports extending between the said joists and embracing the same, the floor slab being formed with extensions embracing the heads of the said joists, the said concrete being continuous and embracing the ends 01 said joists.

9. A concrete floor formed with pre-cast joists having girder supports extending between the said joists and embracing the same, a floor slab formed with embracing portions for the heads of the said joists, the concrete being continuous and embracing the ends of said joists, and reinforcement rods in the floor slab above the said girder parallel to the said joists affording cantilever support and continuity.

10. A concrete floor formed with pre-cast joists having girder supports extending between the said joists and embracing the same, a floor slab formed with embracing portions for the heads of the said joists, and reinforcement rods in the floor slab above the said girder parallel to the said joists affording cantilever support and continuity.

HOWARD F. YOUNG.

DISCLAIMER Estate of Hereby disclaim claims 4,

said Howard F. licensee, Lzth-I-Bar Company? 5, and 8 of said Letters Patent.

[Qflicial Gazette October 20, 1942.]