US2105106A

US2105106A - Precast reinforced tile beam and span tile floor structure

Info

Publication number: US2105106A
Application number: US107838A
Authority: US
Inventors: Charles T Bridgman; Giese Henry
Original assignee: IOWA STATE COLLEGE ALUMNI ASS
Current assignee: IOWA STATE COLLEGE ALUMNI ASS; IOWA STATE COLLEGE ALUMNI ASSOCIATION Inc
Priority date: 1936-10-27
Filing date: 1936-10-27
Publication date: 1938-01-11
Anticipated expiration: 1955-01-11

Description

Jan. 1l, 1938. c. BRIDGMAN Er AL 2,105,106

' PRECAST REINFORCED TILE BEAM AND SPAN 'TILE 'FLOOR STRUCTURE Filed oct. 27., 195e pointed out in our claims,

Patented Jan. 11,1938

UNITED STATES PRECAST RINFORCED TILE BEAM AND SPAN TILE FLOOR STB'UCTURE Charles T. Bridgman, Desl Moines, and Henry Giese, Ames, Iowa, assignors to Iowa State College Alumni Association,

Incorporated,

Ames, Iowa, a corporation of Iowa Application October 27,

3 Claims.

Our present invention relates to a floor structure involving the use of pre-cast reinforced tile beams and span tile.

More particularly, it is the purpose of curinvention to provide in such a structure beams inade of pre-cast tile. Each such tile has a central body portion and has at its opposite sides below its top, upwardly opening channels to receive concrete and steel reinforcing. i

Thus itis our object to provide a floor structure having inverted T-beams, each made of tile of the kind above described, laid end to end with mortar joints, and having the channel on each sidesubstantially filled with concrete in which is reinforcing steel.

The span tile project above the beams. A thin slab of concrete is placed on this beam and span tile structure;r The concrete flows into the ends of the span tile and covers the top and upper side portions of the beams, whereby we bondv the entire structure together in such manner as to provide maximum load carrying strength in what is a T-beam floor structure,

With these and otherobjects in view, our invention consists in the construction, arrangement and combination of 'the various parts of our pre-cast reinforced tile beam and span tile iloor structure, whereby the objects contemplated arel attained, as hereinafter more fully set forth, d illustrated in the accompanying drawing, in w ch:

Figure 1 is a perspective view of one' of the tile used in making the inverted T-beam which forms a. part of our floor structure.

Figure 2 is a perspective view of our iioor structure illustrating various steps in the construction; and

Figure 3 is a detail, sectional view taken on the line 3-3 of Figure 2, of a completed iioor.

In the accompanying drawing, we have used the reference character A to indicate generally the tile used in making the beam.` The tile A comprises a central body portion having the form of an ordinary hollow tile, having the top II), sides Il, and the bottom I2, and having the central opening I3, extending lengthwise through the tile.

Projecting laterally Afrom the bottom I2 in oppositer directions are the extensions Il, which terminate in upwardly extending walls I 5.

There is thus formed at the side of each central body member an upwardly opening channel, such as is indicated .at I6. e

The tile is preferably formed with lengthwise corrugations I] on its top I0, side walls II and 1936, Serial No. `107,838

(Cl. 'l2-66) in the upper surface of the extensions I4 and the inner faces of the walls I5.

Referring now to Figure 2, our improved floor structure includes beams B formed fromthe tile yA in the manner hereinafter more fully described,

span tile C,and a concrete slab D.

vOne ofthe advantages in our struct-ure arises from the fact that the beams B may be made on the job by placing a number of tile A end to end on any siutable support, such as a plank, with the adjacent ends of the tile buttered with mortar, then concrete I8 is pourned into the channels at the sides of the beam, and steel reinforcing rods I9 are properly embedded in the concrete It. A

It will, of course, be understood that the size of the tile beam may be varied and that the v size ofthe reinforcing may also be varied depending upon the job under construction. l

The beam B can be made of the desired length.

After `the concrete is cured, the beams may be placed in properly spaced position in the building,

Span tile C are set on mortar beds on and between successive beams B, as illustrated `in Figure 3. The span tile may be hollow tile of such length and `size as may be selected for the purpose. Ordinarily they will vary from twelve to twenty-four inches in length.

It will be observed that another important advantage in this structure liesin the arrangement, whereby the ends of the span tile C have positive support on the horizontal shoulders formedA by theconcrete I8 in the channels I6,

Thus we have the"advantage that the span tile do not depend on a vertical bond for support, but have the solid shoulder or shelf thus afforded. The parts are so proportionedand assembled that when the span tile have been laid, they project above the tile of the beams B enough to allow access to the passages through them. The `.span tile are also so laid that concrete may ow between their ends and the` walls II of the tile'A of they beams B.

vNext soft concrete is poured on top of the span tile and beams as indicated at D.

The concrete of the slab D flows down between the ends of the span tile C into the ,spaces between such ends and the side walls of the tile A down to the concrete I8.

Some of the concrete D ilows into the ends of the span tile C as indicated at 22 inFigure 3. There is thus aiiorded an intimate and very strong bond between the concrete of the slab D. and the span tile and the beams B.

An important advantage in the structure hereinbefore described lies in the free adaptability of the structure for making various spans to carry a variety of loads. With ve variables, adjustment can be had for getting any needed strength, for example, for .structures ranging from residences to warehouses.

It is an easy matter to vary the length of the beams, to use reinforcing of different strength,

- to vary the length of the span tile and consequently the spacing of the beams, to vary the depth of the span tile and to vary the thickness of the concrete topping, and thus adapt the fioor structure to the particular job. All this can be done with one size of beam tile.

We have made and supervised a great many experiments as a result of which design tables have been prepared, which are available for builders.

By following these tables, the builders can construct iioors, ceilings, or the like for various spans or live loads. Furthermore this construction has come into practical use in residence and commercial buildings, and has the approval of numerous city engineers for the building codes of their cities.

Another reason for the acceptance of our floor structure is the economy with which it can be built.

The use of forms and shoring is entirely eliminated.

By theY particular construction here illustrated, we have beenable to produce a composite rein- Aforced tile and concrete T-beam iioor structure with a minimum of weight and hence of cost. By our design and use of material we have been able to utilize the strength of the materials most effectively and have reduced the material and weight in the zone -of `the neutral axis.

We claim as our invention:

1. In a floor structure, a series of beams, each comprising tile laid end to end with 'mortar joints, each tile having formed at its opposite sides below its top laterally projecting, upwardly opening channels, the channels being substantially illed with reinforced concrete, hollow span tile laid uponA and between the successive beams withI their ends resting directly on the horizontal shoulders thus formed, and concrete above the beams and span tile bonded to the interior of the span tile and to the first-named concrete and to the upper side walls and tops of the beams.

2. A reinforced tile beam comprising a series of similar tile laid end to end, with mortar joints, each tile comprising a hollow central body, having a top, spaced sides and bottom, lateral extensions projecting horizontally in opposite directions from the bottom, having at their outer edges vertical upstanding nat-topped walls terminating short of the top of the tile'to form channels at the sides of the tile, the channels at the sides -of the beam having therein concrete, forming continuous bodies, and metal reinforcing rods in the respective bodies of concrete.

3. A reinforced tile beam comprising a series of substantially similar tile laid end to end with mortar joints, each tile comprising a hollow central body with a top, spaced sides and a bottom and lateral extensions projecting horizontally in opposite directions from the bottom and terminating in upstanding flat-topped fianges shorter than the central body whereby channels are formed at the sides of the tile, said beam being combined with span tile having their ends resting upon said anges, the span tile being hollow with their open ends adjacent the beam and extending above the beam, reinforcing rods in said channels near the bottoms thereof, concrete filling said channels and arranged between the span tile and the beam and projecting into the open ends of the span tile, the span tile being arranged close together side by side and covered by concrete.

CHARLES T. BRIDGMAN. HENRY GIESE.