US1641084A - Construction of reenforced concrete floors - Google Patents

Description

1927' w. R. D. INNES ET AL CONSTRUCTION OF REENFORCED CONCRETE FLOORS Filed. Oct. 2 192;

Patented Aug. '30, 1927. V

: UNITED; STAT-ES WILLIAM RoBER'r DRAYToN INNES, or 'MnLRonRN 'vIcToRIA, AUSTRALIA, ND

MALCOLM SHORE STANLEY, or ADELAIDE, SOUTH AUSTRALIA, AUSTRALIA, AS- SIGNORS 'ro JAMES BELL a co; PRorRI T RY LIMITED, or MELBOURNE, 'vrc- TORIA, AUSTRALIA,.A COMPANY EGISTERED UNDER THE LAWS or vIoToRI 'ooNSrRU'oTroN 01+ REENroRcEn CONCRETE FLOORS. 1

Application filed'potober 26, 1923, Serial No. 670,975, andin Australia April 24, 1923.

This invention relates to the construction" is retained where necessary. The hollow tiles are permanently retained as "part of the floor.

A finished floor constructed according to this invention comprises anumber of narrow ribs of concrete extending across the spaces V between solid concrete Slabs positioned over the tops of the supporting columns, such ribs crossing one another approximately at right angles and having flared or gradually thickened ends merging into such solid slabs,

with a lightly reenforced layer of concrete covering and connecting the tops of the ribs and slabs and forming the floor surface, the ribs and the slabs having embedded'within them Suitable reenforcements and the spaces 145 between the sides of the ribs being filled by light tiles.

In order that our invention may be clearly understood we will describe'the same with reference to the accompanying drawings in which Fig. 1 is a plan View partly in section of portion of a floor constructed according to our invention, and

Fig. 2 is a cross section on line 2-2 of Fig. 1. v

In constructing a floor according to this invention a temporary centering is erected to carry the floor while it is being laid. This centering may be constructed after any usual or approved manner and is not shown in the drawings. Upon this temporary centering are placed a number of hollow tiles A arranged in rows around the tops of the supporting columns B with spaces between them forming troughs for the ribs C in which suitable reenforcements D preferably of steel rod are laid.

. The tiles A are placed only over the spaces between the tops of the columns, leaving, a

clear space immediately over and adjacent to the top of each column. Tiles of various shapes may be used but rectangular ones are simple and economical to produce.

Around the edge of each of the beforementioned spaces isplacecl a row or border of tiles A of diminishing width with spacesbetween them for the reenforcements. Pref erably prismoidal or tapering hollow tiles are used placed with their narrow faces to wards the column as shown in Fig. 1. More than one row of such tapering tiles may be used, or several rows of tiles progressively reduced in size to form a gradually increasing space forthe concrete. Within such row or border of diminishing tiles there remains over the top of each column a plain space which is subsequently filled with concrete forming a solid slab C immediately over and extending in cantilever formfrom the top of the'column.

Suitable reenforcements are laid in the troughs or spaces between the tiles and across the tops of the columns, and very light reenforcements are laid across the tops of the tiles. Concrete is then filled into such spaces and a covering layer spread over the ribs, the tiles and the cantilever slab.

In the case of a heavily loaded floor it may be considered advisable to use a dropped panel over the top of the column by increasing the thickness of the cantilever slab as shown in Fig. 2.

The effect of this mode of construction is that when theconcrete is placed between and over the tiles and reenforcements and over the columns and fills the spaces it produces PATENTOFFICE.

a number of comparatively narrow concrete ribs C between the tiles with flared or gradually thickened ends C merging into solid concrete slabs C over the tops of the columns and with a covering layerof concrete over and connecting theltops of the ribs and slabs and forming the floor surface. The tiles form a permanent part of the floor and, after'the centering has been removed, the undersides of the ribs and of the tiles being level one with the other will show a plain soflit for the ceiling of the room beneath.

These thickened ends C of the concrete ribs between the tiles give additional resistance against shearing stresses at the edges of the column slabs. Thev greater depth of floor slab permitted by the use of hollow tiles imparts to the floor additional stiffness against deflection. It reduces the deadweight of the floor to a minimum; It

permits of the application of flat slab floors to structures with greater economy than possible by the use of the solid tlat slab.

The expression tiles used in this specification is intended to cover blocks of mate rial either hollow or solid and made of various materials such as earthenware, breeze, or other relatively light suitable material.

What we claim is-- A monolithic reeniorced concrete floor composed of a number of solid concrete slab portions positioned over the tops of the columns which support the floor, a number of concrete ribs extending across the spaces between such slab portions and crossing one another approximately at right angles,

whereby to surround the slabs, the ends of said surrounding ribs gradually thickeneiil toward the slabs or ribs and merging into said slabs, light tiles positioned between such ribs, suitable reenl orceiuents embedded in the slab portions and ribs, and a lightly reenforced layer of concrete covering and connecting the tops of the ribs and slabs and forming the floor surface, the whole forming an integral .tloor structure.

In testimony that we claim the foregoing as our invention we have signed our names this 4th day of September, 1923.

WILLIAM ROBERT DRAYTON INNES. MALCOLM SHORE STANLEY.

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