US1277622A

US1277622A - Trussed-sheet building material.

Info

Publication number: US1277622A
Application number: US10682316A
Authority: US
Inventors: John O Madison
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-06-30
Filing date: 1916-06-30
Publication date: 1918-09-03
Anticipated expiration: 1935-09-03

Description

1.0. MADISON.

TRUSSED SHEET BUILDING MATERIAL. APPLICATION FILED JUNE 30. |9l6.

1,27%622. Patented sept. 3,1918.

2 SHEETS-SHEET l.

, INVENTOR /3 M 1.0. MADISON. TRussED SHEET BUILDING MATERIAL.

I APPIIcATIoN FILED JUNE 3o, I9Is; 1,27'?,622. Patented sept. 3,1918.

2 SHEETS-SHEET 2.

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JOHN 0.A MADISON, 0F BROOKLYN, NEW YORK.

TRUSSED-SHEET BUILDING MATERIAL.

Specification of Letters Patent.

Patented Sept. 3, 1918.

Application tiled J une 30, 1916. Serial No. 106,823.

To all 'whom t may concern.'

Be it known that I, JOHN O.'MAD1soN, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Trussed-Sheet Building Material, of which improvement the following'is a specification.

This invention relates to building material for walls, partitions, flooring, ceilings, roofs, and the like, and has for its object to provide an improved truss sheet construction which shall be iire-proof, heatinsulating, sound proof, and of light weight, but at the same time shall be strong and durable, and adapted to carry heavy loads.

My invention comprises, primarily, a pair of sheets, preferably steel, constituting the outer chord members of the trussed structure, and rigidly connected together at certain intervals by intermediate web members composed of integral projections or depressions formed on one or both sheets and separated from each other laterally and longitudinally, preferably in a staggered relation, said projections or depressions being of a depth many times the thickness of the sheet suflicient to produce a strong truss effect, and formed integral with the sheet by means of a rolling, molding or pressing process, in which case the depressions will be of such a depth as is consistent with the practice in the art of deep pressing, drawv ing, or metalrolling, as well as with the economical distribution of the material for trussing purposes, whereby the sheets are spaced apart and rigidly secured together in a trussed relation, which forms a v ery light but strong and durable construction, capable of sustaining heavy loads. The trussed sheet structure may also be covered, on one" or both sides, with a layer of concrete, cement or otherplastic, stiifening, insulating, or wearing material, securely fastenedto said sheet or sheets.

` In the accompanying drawings: Figure l1 is a sectional View, showing one -form of trussed sheet metal construction embodying my improvement; Fig. 2, a similar view showing a modified construction; Fig. 3, a similar sectional view showing `the plastic material applied to one side of the trussed metal sheet; Fig. 4, a plan of the form of trussed metal sheet shown in Fig. 2; Fig. 5, a sectional view showing one method of anchoring or securing the layer of cement or plastic material to the metal sheet; Fig. 6, an inverted plan of same; Fig. 7, a sectional view similar to Fig. 3, but showing layers of plastic material secured upon both sides of the trussed metal sheets; and Fig. 8, a plan, similar to Fig. 4, but showing a giffer'ent shape of depressions or truss memers.

According to the construction shown, my improvement comprises a pair of metal plates constituting outer chord members of the trussed structure and spaced apart in a substantially parallel relation by intermediate web members rigidly connected with said plates. The web of the truss members are preferably formed of integral portions of one or both of said plates or sheets `in the form of deep depressions, which may be pressed or rolled into the metal sheet at certain spaced intervals. This spacing interval of the depressions in the direction of stress, preferably has a certain relation to the thickness of the compression chord member of the truss, being a certain number of times this dimension in order to prevent undue buckling of the sheet. As shown in Fig. 1, one of the metal sheets, 13, is provided with the integrally connected depressions, 15, while 'the other metal sheet, 14, is a plain sheet rigidly secured to the said depressions by riveting or by a spot Weld at the bottom or apeX of each depression, or in any other convenient way.

A preferred construction is shown in Fig. 2,. in which the two metal sheets, 13 and 13a, are of the same form and construction, both having the regularly spaced depressions, 15, which are placed back to back and rigidly secured together at the bottom or apices of said depressions. In this way the two plates are spaced apart a distance substantially equal to double the depth of the depressions and form a strong and durable sheet metal structure for use in building structures of various kinds, such as flooring, walls, partitions, roofs, etc.

When used as flooring, one or both sides of the sheet metal structure may preferably be provided with a layer of plastic or insulating material, 16, such as cement or concrete and the same may be rigidly anchored 0r secured to the metal sheets in any desired manner, as for instance by metal clips, 17,

`welded into some of the cup shaped depressions, 15, as indicated in Figs. 3 and 7. A preferred means, however, for fastening "the layer or layers of insultating plastic material to the metal sheets is shown in Figs. 5 and 6, wherein some of the depressions, 15, are pressed inward at opposite sides to form openings, 18, through the metal sheet to permit the plastic material to force itself through to some extent when soft, and then to securely anchor itself in position when the same hardens, as will be readily understood. Except for these small openings for the plastic material the sheet is preferably formed substantially' whole or imperforate in order to increase the strength and stiffness of the trussed structure.

For strengthening purposes, the metal sheets may be provided with strengthening ribs, 19, -arranged either longitudinally, diagonally, or both, as indicated in Fig. 4.

The depressions may also be made elon-V gated or otherwise varied in shape to vvsuit different conditions as shown in Fig 8.

g The space between the two metal sheets may be filled with mineral wool, felt, or other sound deadening or a heat insulating material, or may be left clear, the air space itself constituting an excellent heat insulating medium. This space may also be used for currents of air or other iuid for ventilation, heating, or refrigeration purposes, or the space may be made tight by sealing at the edges and thereby serve to increase the buoyancy when the material is used in the construction of floats, life boats, rafts, ships, aeroplanes, seaplanes, hydroplanes, submarines, etc.; as for example, when the construction is of aluminum or its alloys, the buoyancy is several times greater than Y, that of wood construction.

An essential feature of my improvement comprises the construction .in which the sheet having the projections or-depressions forming the web members, itself constitutes a chord member of the trussed structure,

and where .the depressions are formed in both sheets, these constitute the two opposite outer chord members, whereby a twosheet construction is produced in which the material of the sheets is located as far as possible from the middle Yor neutral axis, and consequently gives a maximum resistance to thel bending and shearing stresses, and the most economical distribution of the material for a given weight and depth of the trussed structure. At the same time when sealed at the edges this construction gives a greatly increased displacement and buoyancyj The chord members may, of course, be increased in thickness with additional sheets if desired.

While the preferred construction, as herein described, applies to a metal sheet structure, it will be evident that there may be certain instances wherein sheets of strong non-metallic material may be used for producing avery serviceable and durable trussed structure, and my invention is not therefore limited to metal sheets only, but may also cover sheets of certain non-metallic material that may be compressed or molded into the desired shape.

I am aware that, prior to -my invention, panel structures have been proposed, in which two outer plain metal sheets have been spaced apart and secured by an intermediate reinforcing sheet or sheets having projections or depressions formed thereon, but in no case, so far as I am aware, do such prior structures disclose a Sheet provided with the above described integral projections or depressions, and itself constituting an outer or chord member ofthe trussed structure. This is an important feature of my improvement, since by this means a scientifically constructed and highly efficient trussed structure may be produced by using two sheets only, whereas in said prior constructions it is necessary to employ three or more sheets.

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

1. A trussed sheet structure adapted to withstand heavy loads or stresses, comprising-a continuous rigid sheet constituting a chord member of the truss, and formed with permanent yintegral depressions of a depth many times the thickness of the sheet, suflicient, to produce a strong trussing effect, said depressions forming web members spaced apart laterallyv and longitudinally1 suitable distances to prevent buckling, and another sheet rigidly secured to the apices of said depressions and constituting an opposite chord member of the trussed structure.

2. A trussed sheet structure, comprising a metalsheet constituting a chord member of thetruss, and formed with/permanent integral depressions of a depth many times the thickness of the sheet, sufficient to produce a strong trussing effect, said depressions being suitably spaced' laterally and the truss, and formed with permanent elongated depressions of a depth many times the thickness of the sheet sufficient to produce a strong trussing effect, said depressions forming web members spaced apart laterally and longitudinally distances suitable to prevent buckling, and another metal sheet rigidly secured to the apices of said depressions and constituting an opposite chord member of the trussed structure.

4. A trussed sheet structure, comprising a metal sheet constituting a chord member of the truss,.and formed with permanent integral projections of a depth many times the thickness of the sheet, suicient to provide a strong trussing eiect, said depressions forming web members spaced apart laterally and longitudinally distances suitable to prevent buckling, and another metal sheet having corresponding depressions rigidly secured to the apices of the depressions of the first sheet.

5. A trussed two metal sheets constituting the opposite chord members of the truss, and each formed with permanent integral depressions of a depth many times the thickness of the sheet, sufficient to provide a strong trussing efect, said depressions being suitably spaced laterally and longitudinally in a staggered relation and rigidly secured together at the inner ends or apices of said depressions to constitute the aweb members of the truss.

6. A trussed sheet structure adapted to withstand heavy loads or stresses, comprising a sheet constituting a chord member of the truss, and formed with permanent integral depressions of a depth many times the thickness of the sheets, sufficient to produce a strong trussing eiect, said depressions forming web members spaced apart laterally and longitudinally suitable distances to prevent buckling, another sheet rigidly. secured to the apices of said depressions and constituting an opposite "chord member of the trussed structure, a layer of plastic masheet structure, comprising terial applied to said first sheet and filling said depressions, and means for anchoring the plastic material to said sheet.

7. A trussed sheet structure adapted to withstand heavy loads or stresses, comprising a sheet constituting a chord member of the truss, and formed with permanent integral depressions of a depth many times the thickness of the sheets, sufficient to produce a strong trussing ei'ect, said depressions forming web members spaced apart laterally and longitudinally suitable distances to prevent buckling, another sheet rigidly secured to the apices ot said depressions and constituting anopposite chord member of the trussed structure, and a layer of plastic material applied to said first sheet and filling said depressions, some of the depressions being perforated to allow the plastic material to anchor itself to said sheet.

8. A trussed sheet structure, comprising a substantially whole or imperforate sheet -constituting a chord member of the truss,

and formed with permanent integral depressions of la depth many times the thickness of the sheet, suiicient to produce a strong trussing effect, said depressions bei ing suitably spaced laterally and longitudinally to prevent buckling and constituting web members, and another sheet rigidly secured to the apices of said depressions and constituting an opposite chord member of the truss.

JOHN o. MADISON.