US1131092A - Reinforced concrete construction. - Google Patents

Description

A. H. SGHUETT. RBINFORCED CONCRETE CONSTRUCTION.

Patented Mar. 9, 1915.

8 SHEETS-SHEET 1.

APPLICATION FILED SBPT.15,1910 ,092.

A. H. SGHUBTT.

RBINFCRCBD CONCRETE CONSTRUCTION.

APPLICATION FILED SBPT.15, 1910.

1,1 31,092. Patented Mar. 9, 1915.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

ALBERT I-I. SCHUETT, OF ST. PAUL, MINNESOTA, ASSIGNOR TO PATENTED DEVICES COMPANY, 0I? PORTLAND, MAINE, A CORPORATION OF MAINE.

REINFORCED CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Patented Mar. 9, 1915,.

Application filed September 15, 1910. Serial No. 582,269.

T0 all whom it may concern Be it known that I, ALBERT H. ScHUn'r'r, a citizen of the United States, residin at St. Paul, in the county of Ramsey and tate of Minnesota, have invented certain Improvements in Reinforced Concrete Construction, of which the following is a speciication.

This invention relates to improvements in the construction of reinforced concrete buildings, and particularly to the means for arranging the reinforced concrete floors, and the columns supporting the same; also the arrangement of the steel to reinforce the slabs and the support of the slabs.

The invention consists generally in the constructions and combinations hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification, Figure l is a plan view of a portion of a reinforced concrete Hoor, embodying my invention. Fig. 2 is a section on the line 2-2 of Fig. l. Fig. 3 is a sectional elevation of the columns and brackets formed integrally therewith. Fig. 4 is a vertical section on line 4-4 of Fig. 6. Fig. 5 is a vertical section on line .5-5 of Fig. 6. Fig. (i is a plan view of a construction in principle the same as Fig. 1, but using tile in place of that portion of the concrete that is not required to resist shear, to aid in compression or required for the development of the steel.

Heretofore it has been customary in the construction of {ire-proof buildings of reinforced concrete to provide a series of' reinforced columns arranged in rows in right angles to each other. and to support upon the tops of these columns reinforced concrete girders, extending from the tops of the columns, in one or two directions, and at right angles to each other,- thus providing a series of horizontal., rectangular panels, and then to provide aareinforced concrete floor resting upon and sup-ported by sai/d girders. There are numerous objections to this type of construction, among which may be mentioned the fact that the girders are expensive to construct, occupy considerable space and reduce the amount of light coming into the building; interfere with the location of partitions and are an objectionable protrusion into the room space of the building. The girders as ordinarily used are very expensive as they require a large amount of steel in their construction. I overcome the objections to this type of construction by the combinations shown in the accompanyingdrawings and described in the specification.

In carrying out mv invention I provide a 'series of reinforced concrete columns 2.

These columns may be reinforced in any preferred manner. I have shown in the drawings,` and prefer to use, a construction embodying a series of vertical rods 3, arranged in a circle near the outer circumference of the column, with a spirally wound rod or wire l, inclosing said vertical rods. These columns are preferably spaced regularly in rows in two directions, at right angles to each other throughout the space within the inclosing walls of the building. I have shown the rods arranged at equal distances from one another in both directions so that lines at right angles to each other, joining the centers of the columns, will form equal sided parallelograms, or squares. If preferred, however, the distance between the centers of the columns in one direction may be greater than the distance between the centers of the columns in the other direction, in which case lines at right angles to each other, joining the centers of the columns, will form parallelograms, two of whose sides are of greater length than the other two sides. Formed integrally with each column are brackets, preferably four in number, extending from the tops of the columns, and preferably in directions diagonally to the outer walls of the building. These brackets form cantalivers at the tops of the columns. The reinforcing rods for the opposite brackets extend through the top of the adjacent column as shown in Fig. 3 of the drawings. AAs here shown I preferably provide a series of rods 5. which extend horizontally through the column and for the length of each bracket. near the top thereof. At the ends of the brackets, these rods are provided with a depending section 5 and then with the inclined sections 5, which extend near the bottom wall of the l 1ackct to and into the side of the column. I thus have a single bar 5. with the two depending sections 5 and the two inclined sections 5". In fact, the bar is bent substantially to conform to the outline of two oppositely arranged brackets. In addition Iprefer to provide for each bracket additional rods 6, each of which extends through the top of the column and is then provided with an inclined section 6, extending diagonally through the bracket to a point near the lower wall thereof, then at an incline parallel with the bottom of the bracket in a section marked 6 and withan upturned end 6. These bars are of different lengths so as to be distributed throughout the length of the brackets. I have here shown three of theI bars (5, but a greater or less number may be employed as required, and any desired number of small bars may be arranged side by side in the body of the bracket. I also prefer to provide a series of vertical wire stirrups 7, extending around all o'l" the rods 5 and t5, as shown by the section of one of' the brackets in F ig. 3. This arrangement o1 the rods and wires in the brackets makes cach become a cantaliver and the rods 5 and (5 constitute the necessaryv reinforcement to resist the bending or tension strain upon the bracket. The inclined. portions U ofthe rod also provide suitable resistance against the vcrtical shearing stress, while the wire stirrups 7 hold the rods in proper relation to each other, and with the inclined portion 6 of the rod 6 provide the proper resistance against the horizontal shearing stress. l

I do not employ any beams or girders in the construction of the lioor, but I provide a fiat slab floor that is supported upon and formed integrally with the brackets already described. In constructing this lloor I provide two series of reinforcing rods 8 and t) that are preferably arranged in groups and extend at right angles to each other, throughout the length and width ol the building, and which'preferably cross the brackets diagonally and at points near their outer ends. This arrangement is clearly illustrated in Fig. l of the drawings, in which the outlines of the brackets are shown by dotted lines and the groups of rods S are shown extending cross-wise of the sheet and passing diagonally through, or over, the ends of the brackets at points near their ends, and the rods 9 are Shown extending at right angles to the rods S, and in similar relation to the ends ot' the brackets.

The rods 8 and 9 in my construction, take the place of girders in the usual construction, and divide the Hoor up into a series of panels. I lprefer to provide the` reinforcement for the floor by several parallel sets of rods which extend across, or through, one of the panels and have their ends embedded in the arms of the brackets. This arrange-- ment will be readily understood from an examination of Fig. l of the drawings. Here it will be seen that the rods l0 run through the lower panel of Fig. l, and have their ends embedded in the opposite bracket arms. The rods 11 in the upper panel are parallel to the rods l0 and have their ends embedded in the opposite brackets. The rods l2 in the right. hand panel and 13 in the left hand panel, are parallel to each other, but at right angles to the rods 10 and ll. The rods l2 and 13 are shown in section in Fig. 2 of the drawings. In this figure the rods 9 are also shown. It will be seen that this arrangement provides for supporting all of the panels of the iloor directly upon the brackets, but it leaves an intermediate panel not supported. 'Ihis panel is provided with two series of rods in order that the portion of the slab acting as a girder or beam will-not be overloaded. I prefer for this panel to provide (see Figs. l and 2) two series of rods 14 and l5, near the under side of the floor, arranged at right angles to each other and passing over the rods S and 9, and in the upper part of the lloor I prefer to provide an additional set of short rods 16, arranged over the rods 8 and 9 clear around the panel and projecting over these rods into the adjacent panel as shown in Fig. l of the'drawings. These rods form cantalivers in the upper part of the floor and materially aid in the reinforcement of the intermediate panel. Il preferred the brackets on the tops of the columns may extend in directions parallel with thc outside walls of the building, and, in this instance, the girder rods may cross the bracket arms at right angles. This construction will be somewhat heavier than that which I have described and I consider the diagonal arrangement preferable. I may, with the saine arrangement of brackets and rods, use a tile coi'istruction for the lloor outside oi the panels directly over the brackets as shown in Figs. i, 5 and (5. The arrangement of the brackets and of the girder rods S and tl is the same in this instance as that represented by Figs. l and il of the drawings, but instead of having' the panels outside of thc ones that are directly over the brackets formed of the reinforced concrete, I may employ hollow tile for forming the panel sections as shown in Figs. 4, and of the drawings. In this instance, in the panels between the rows of columns, I arrange a series of reinforcing rods 17, parallel to the girdcr rods 8, and at right angles to the girder rods 9. (See Fig. 5.) The ends of these rods are preferably upturned at 17 and are embedded in the concrete of the adjacent panels. Between the rods 17 I arrange a series of hollow tiles 18. These tiles are preferably placed in rows, the tiles in each row being close to each other and the spaces between the rows, in which the rods 17 are inclosed, being 'filled with concrete which unites with the .edges of the tiles and holds the files in position. In the adjacent series '02 panels (excepting those panels that are' rectly over the heads of the columns and the brackets) I arrange similar rods 19, preferably extending at right angles to the girder rods 8 and parallel with the girder rods 9, and I prefer to arrange tile 18 between`these rods in the manner already described. By this arrangement, having the rodsin one set of panels at right angles to those of the otheryfthe load of the flat slab floor is equally distributed to the two sets of girder rods 8 and 9, and thus equally distributed to all of the brackets on the reinforced columns. The tile 18 shown in section in Fig. 4 of the drawings, may differ in thickness, thereby requiring the use of more concrete at the points nearest to the girder rods 8 and 9 where the shear is greatest. If it is desired to use so-called four-piece tile, the tile in each row may be separated and cross-reinforcing rods at right anglesyto the rodsr17, may be employed in each panel.

Short reinforcing rods 20, corresponding to the rods 16 in Figs. 1 and 2, may, if preferred, be employed in the top of the slab over and at right angles to the girder rods 8 and 9. (See Figs. l and 5.) These rods will act as cantalivers for the panel sections between the said girder rods 8 and 9.

I do not limit myself to the use of reinforced Concrete columns and brackets. I

-congjder thesepreferable, but the advanes of my flat slab floor may be obtained oy using steel or other suitable columns, with steel or other suitable brackets arranged thereon. In this instance the brackets will notextend above the line of the unbrackets.

It will be obvious that the details of the construction may be varied in many particulars without departing from my invention.

I claim as my invention,

1. In a reinforced concrete building structure, the combination with a series of reinforced columns, of reinforced brackets formed integrally with said columns, and projecting therefrom in opposite directions, reinforcing girder rods 8 and 9, extending from column to column at right angles to each other and diagonally through the said brackets, near the ends thereof, and dividing the Hoor s aceinto a series of panels, and a series ol reinforcing flo-or slab rods arranged in each panel, parallel to each abther, the rods in one row of panels being at Athe first mentioned an vil right angles to the rods in the adjacent row of panels, substantially as described.

2. In a reinforced concrete building structure, the combination with a series of reinforced columns, of reinforced brackets formed integrally with said columns and projecting therefrom in opposite directions,

reinforcing girder rods'8 and 9 arranged at right angles to each other and extending from column to column and through said brackets, near the outer ends thereof, and dividing the floor space\ into a series of panels, a series offloor slab rods 17 extending through each panel, at right angles to the girder rods 9, and a series of floor slab rods 19 extending through the panels of the next adjacent rows, at right 'angles tothe Y having intersecting ends and arranged in.

the form of a polygon, aid central portion being surrounded and supported by said as f beams, and reinforcement within the slab forming cantalivers over the main supports and vsupporting the beams at the angles of the polygon. y

. 4. A girderless monolithic reinforced-concrete construction consisting of a plurality of main supports and a lflat slab ofconcrete over the main supports, said supports being located at the angles of the slab, said slab containing reinforcement extending directly from one support to another and forming beams of a width 'exceeding the thickness of the slab,said slab comprising a'central portion, reinforcement within the slab forming a plurality of beams lying between the first mentioned beams and Vthe central port'ion, the second mentioned beams being arranged in the form of a polygon, yand reinforcing means within the slab forming cantalivers over the main supports and supporting the second mentioned beams at the angles of the polygon.

5. A girderless monolithic reinforced-concrete construction consisting of a plurality of main supports and a fiat slab of concrete over the main supports, said supports being located at the angles of the slab, said slab containing reinforcement extending directly from one main support to another and forming beams of a width exceeding the thickness of the slab, said slab comprising a centralf ortion reinforcementY within the slab forming a pluralityof beams lying between the central 13 por'tion, and carrying said central portion, i In 1witness whereof, I-have beteunt' set the secofnd mentioned1 beams being arfranged my hand this 12 day of Sept. 1791.0.-v p in the orm of a po ygon and rein orcng i means rWithin the slab folming cantalivers `g ALBE\RT HbCHUETT ove1` the main supports and supporting the Witnesses.; second mentioned beams at the angles of the TAQCE GOLDEN,

polygon. G. E SORNsEN.\

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