US1248049A

US1248049A - Reinforced concrete construction.

Info

Publication number: US1248049A
Application number: US74987913A
Authority: US
Inventors: John Wunder
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-02-21
Filing date: 1913-02-21
Publication date: 1917-11-27
Anticipated expiration: 1934-11-27

Description

J. WUNDER.

REINFORCED CONCRETE CONSTRUCTION.

AP\PLICATION man FEB 21. i913.

11. ama, Patented; Nov; 27, 19121 4- SHEETS-SHEET L 777M J'dW/V wumoma 3 L QM G MQ WM\ htemed Nov. 2?, 191?.

4 SHEETS-SHEET 2.

J. WUNDER.

REHNFORCED CONCRETE CONSTRUCTION.

APPLICATION FILED FEB-2! mmwn J. WUNDER.

REINFORCED CONCRETE CONSTRUCTION.

- APPLICATION FILED FEB- 21, i9l3.

E gg q g Patentefl Nov. 27, 1917,

4 SHEETSSHEET 3- J. WUNDER.

REINFORCED CONCRETE CONSTRUCTION.

- APPLICATION FILED FEB-21.1913. Patented Nov. 2!, 191?.

4 SHEETS-SHEET 4- Q Q m M M W {O u 6 MW w MW i Mm iris snares ranr rrion;

JOHN WUNIDEE, 0F MINNEAPOLIS, MINNESOTA.

REINFORCED CONCRETE CONSTRUCTION.

Laaaoaa.

Specification of Letters Patent. Pa tgntd Nuiv, 27, 119117,

Application filed Februar 21, 1913, Serial No. 749,879.

To all whom it may concern.

Be it known that 1, JOHN WVUNDER, a citizen of the United States, resident of Minneapolis, in the county of Hennepin and State provide a fiat slab construction in which the beams or girders which are preferably employed are concealed within the structure of the floor slab, so that the floor slab presents preferably a flat, unbroken surface, both at the top and at the bottom. Some features of the invention may, however, be employed in those flat slab constructions which do not employ any beams or girders, but are of what is known as the flat slab cantaliver relnforcement, a

construction.

Another object of theinvention is to pro-- vide a construction that furnishes in proximity to the columns means for carrying service pipes such as thoseused for lighting systems, water supply and sewerage.

Another object of the invention is to provide in connection with the flat slab floor a. suspended ceiling between which and said floor heating and ventilating conduits may be arranged.

Other objects of the invention will appear from the following detailed description,

taken in connection with the accompanying drawings, of which,

Figure 1 is a vertical section of a portion of a flat slab floor and reinforced supporting column, embodying my invention,

Fig. 2 is a section of a portion of one of the column plates, showing the arrangement of compression andtension members of the concealed beam in reference thereto,

Fig. 3 is a vertical section of one of the column plates with an elevation of one of the cantaliver tension members of the concealed beam,

Fig. 4 is a section of a column plate with an elevation of one of the shear members arranged in connection therewith,

' Fig. 10,

Fig. 5 is a plan view,

Fig. 6 is a transverse vertical section of one of the column plates,

Fig. 7 is a plan View of a portion of a flat slab floor embodying my invention, illustrating-the use of a series of hollow tile in said floor,

Fig. 8 is a transverse section on

line

8, 8 of Fig. 7,

Fig. 9 is a plan View showing one of the column plates and the arrangement of the reinforcing members where they pass through the column, and reinforcing members of concealedbeams and showing in dotted lines the location of the tile similar to those shown in Figs. 7 and 8, and also showing their relation to the concealed beamsof the floor, I

Fig. 10 is a plan view of a portion of a floor showing four columns with the concealed beams extending directly between columns and with the panels supported upon the concealed beams by suitable two-way Fig. 11 is a section on line 11-11 in Fig. 12 is a detail section showing the connection of the slab to a side wall of the building,

Fig. 13 is a vertical section of a portion of the floor and column shown in Fig. 1 and also showing a suspended ceiling providing a space within which service pipes or conduits may be arranged and also showing the arrangement of vertical pipes in relation to y the column and column plates,

Fig. 14 is a plan view of the column plate andcoluinn rods shown in Fig. 13, and

showing also the arrangement of the service pipes in relation thereto. 1

In all of the drawings A represents one of the floor supporting columns, B represents a portion of one "of the flat slabs supported upon and preferably formed integrally with the series of columns A, and C represents a ceiling suitably supported from the floor B as hereinafter described, thereby providing between said ceiling and the under surface of the floor slab a space within which service pipes or conduits may be arranged.

The column A may be formed in any suitable manner. I prefer to provide a series of column reinforcing rods 1, surrounded by spirally arranged rods or wires 2, said rods and wires being embedded in the concrete of the columns, which may be done in any suitable or preferred manner.

I provide at the top of each column section, and arranged preferably with its under surface flush with' the under surface of the floor slab a supportingplate D. This plate as herein shown in Figs. 5, 9V and 14:, is of substantially rectangular form with thecorners omitted, but it will be understood that it may be of circularor other shape.

The column plate D is preferably provided with a centralopening 3, through which the concrete forthe column may be poured, and also with a series of openings t through which the column rods 1 extend. A vertical flange 5 rises from the surface of the plate D and surrounds the holes 4. This flange is herein shown as substantially rectangular in outline as shown in, Figs. 6, 9 and 14; of the drawings. Whether of this form or cir-' cular in outline the flange 5 surrounds the holes 3 and said flange extends upwardly from the main portion of the plate D and has formed integrallywith it radial or sub.-

- stantially radial flanges 6. Outside of the lighting conduits (either electrical-or gas),

flange 5 and between the flanges 6 are the series of openings 7. These openings are provided to permit the vertical service pipes, such as the soil pipes, sprinkling pipes,

water pipes, and any other pipesor condu ts that it is desired to havearranged in proximity to the column, to pass.

While the plate itself assists in resisting shearing stresses, I prefer to provide addi-v tional shearing members E, extendingacross saidplateand arranged at right angles to each other. Each shearing member E is preferably formed of a rod 8 having its ends doubled back and extending parallel to the main portion of the rod, said parallel portions being preferably connected by the lacing wires 9 preferably arrangedso as to extend diagonally between said parallel portions of therod 8; as shown clearly in Fig, 4 of the drawings. The shearing members E are preferably arranged so as to extend at right angles to each other as shown i-nFig. 9 of the drawings with the free ends of .the

' rods bearing against the outer upright wall of the flange .5, and with the lower portion of said rod resting upon the upper surface of the, plate D between the radial flanges 6 a (see Fig. 4,).

This arrangement of the members in-relation to the flanged plates D provides: an

especially efiective resistancetoboth Verti cal and horizontal shear.

I zpreferably' provide concealed beams extending at right angles to each other and directly through the slab. from column to column, thereby dividing up the floor slab into a series of rectangular panels. The portions of the slab constituting said panels are carried by said concealed beams, and said panels are made up entirely of reinforced concrete, the reinforcing slab rods ail being arranged as a two-way reinforcement, as shownin Figs. 10 and 11, or said panels are constituted of reinforced concrete slabs with hollow tile 42 embfifildodtherein, as shown in Figs. 7 and 8.. l 1

For the reinforcement of the concealed beams I preferably provide a seriesof pairs of

cantaliver rods

10 and 11, both of which extend through the lower portions of the beam, the lowerjlQd extending npwardlywhere it passes over or through the column sufficiently to pass over and rest upon the top of the vertical flange .5of:the column plate D (see Figs. 1 and 3),'but otherwiseextending parallel to the lower surface of the slab and concealed beam-and only a short distance above said lower surface. i

The other cantaliver rod 11 extends through the central portion ofthe concealed beam, parallel to "the rod 10, and preferably only'a;

slight distance above it, but at, substantially the pointsofcontraflexure of the concealed beam this rod extendsupwardly to. points near the top of the slab and concealed beam and then extends horizontally. through the column parallel to the upperand lower surfaces of the slab. This arrangement pro- 5, or the plate D. In addition Ihare shown two of such rods extending in eachdirection outside of theouter edge of the plate D.

It will be understood, however, that the 1 number and size of these rods maybe varied to-su t the particularcharacter of the structure that. s being erected.

Arranged preferably in the same plane with the

cantaliver beam rods

10 and 11, I

provide. a series of'rods18j that extend the full length of the beam. near theupper surface. of the concealed beam and slab. These 7 rods are clearly shown in Figs. 1 and 3 of the drawings. They extend at right angles 1 to each other and constitute the outerand upper members. of each concealedbeam.

It will-be seen that the portions of the rods 10 and-11,between the points of contrafiexure of each beam section constitutes tension members, while the portions of the rods 13 between said points, constitute compression members. i

I also prefer to provide additional ten sion and compression members, the former consisting of therods 14, having at their ends hooks 15 which hook over the verti cal flange 5 of the column'plate D (see Fig. 2 of the drawings), and the compression members consisting of the rods 16 Whose ends abut against the outer surfaces of said flanges 5. These rods are preferably tied together by a suitable wire 1.7, where they cross each other, and they are further secured by lacing wires 18 clearly shown in Fig. 2 of the drawings.

I prefer to alternate the rods 14: and 16 with the

rods

10, 11 and 13, as shown in Fig. 9 of the drawings. Any desired number of these members may be employed.

Where no service pipes are to be arranged in connection with the column plates D no attention need be paid in placing the reinforcing rods for the concealed beams, to the holes in the plates D, designed to accommodate such service pipes, and in Fig. 9 of the drawings I have shown the concealed beam reinforcing rods extending across such openings.

In Figs. 18 and 14: of the drawings I have illustrated service pipes extending through certain of the openings in the plate D and in this instance the concealed beam reinforcing rods are arranged so as not to interfere with the passage of said pipes through said openings.

In Figs. 13, and 14, of the drawings, I have illustrated a suspended ceiling C, con sisting preferably of suitable sheets of eX panded metal or netting, and suspended by rods from the slab B and thereby forming a space within which

horizontal air ducts

21 and 22 may be arranged and in which also horizontal portions of service pipes 23, 2-1, 25, 26, 27 and 28, may be eX- tended, the vertical portions of these pipes extending through the openings 7 in the plate D.

I do not limit myself, however, to any particular number or character of the service pipes that may be arranged within the space between the floor slab and the suspended ceiling or that may pass through the opening 7 in the column plates D.

It will be noted that I provide an exceedingly simple and efiicient reinforced con struction in which all of the stresses are taken care of in a scientific manner, while at the same time in each instance a flat slab floor without visible beams is produced. At

ing.

the same time provision is made for the arrangement of service pipes in juxtaposition to the columns, and where the suspended ceiling is employed such service pipes may extend from any column to any other desired part of the structure and heating and ventilating conduits may be provided which are easily concealed by the suspended ceil- By using thehollow tile for the rectangular panels between the concealed beams a light floor is provided which decreases the weight carried by the columns without decreasing the strength of the floors.

I have described the invention as applied to structures having the floor slab supported upon reinforced concrete columns with vertical reinforcing rods extending vertically through the column that are in alinement with one another. It will be understood however, that many features of the invention may be employed when the floor slabs are supported upon metal columns or upon columns formed of structural iron or steel incased in concrete. I do not wish therefore to be limited to the use in all instances of columns formed of reinforced concrete.

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 structure, the combination, with a series of columns and a reinforced fiat floor slabsupported thereon, of metal plates arranged at the tops of the columns and extending laterally beyond the outer faces thereof into the floor slab, each of said plates having a vertical rectangular flange 5 provided upon its upper surface, tension rods 1% extending directly from column column in the lower part of the floor slab and having hooked ends 15 en gaging the flange 5 on said metal plate, and compression members 16 also extending directly from column to column in the upper part of the slab and having their ends engaging the outer surfaces of the flanges 5, and means for supporting upon said bean: rods the rectangular panels formed between them.

2. In a reinforced concrete structure, the combination, with a series of columns and a reinforced fiat floor slab supported thereon, of metal plates arranged at the tops of the columns and extending laterally beyond the outer faces thereof into the floor slab, each of said plates having holes in the pertions thereof that are outside of the faces of the columns, a ceiling suspended from the underside of said floor slab and arranged with a space between its upper sur face and the under surface of the floor slab, whereby service pipes extending In Witness whereof l; have hereunto set my hand this 17th day of February 1913.

JOHN WUNDER.

through the floor slabin proximity to the column may be arranged to pass, through the holes in said metal plates, and portions of said pipes may be extended laterally into, the space between the underside of the floor slab and the upper surface of the suspended ceiling.

l/Vitnesses V H. ADOLPHUS PETERSEN, EDWARD A. PAUL.

Copies of this patent may be obtained for five gents each, by addressing the Gpanmiss ioner of Patents. Washington; D. 0.