US646502A - Building construction for floors and ceilings. - Google Patents

Description

No.' 646,502. Patented Apr. 3, I900.

T. OSHEA. I N BUILDING CONSTRUCTION FOB FLOORS AND GEILINGS.

(Application filed. Ml-1y 12, 1899.)

2 Sheets-Sheet (No Model.)

No. 646,502. Patented Apr. 3, I900.

T. OSHEA.

BUILDING (IQNSTRUCTION FOR FLOORS AND CEILINGS.

(Application filed May 12. 1899.) (No Model.) 2 Sheets-Sheet 2.

n4: NORRIS PETERS cu, PHOTO-LITHO., WASNKNGTON. n, c.

'a specification.

' NITEI) STATES PATENT Fines.

TIMOTHY OSI-IEA, or CHICAGO, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 646,502, dated April 3, 1900.

Application filed May l2 1899- Illinois, have invented certain new and useful Improvements in Building Construction for Floors and Ceilings, of which the following is My invention relates to certain improvements 1n fioors and ceilings designed to produce a complete floor and ceiling firmly secured together, absolutely fireproof, and capable of sustaining the greatest possible load consistent with its weightand cost of construction.

To this end the invention consists in certain novel combinations which utilize the materials to the best possible advantage, both as to strength and as to resistance to the progressof fire. These will be described in detail in their preferred forms, and the essential features pointed out in the claims.

The invention is illustrated by means of six figures, of which Figure 1 is a sectional perspective of a portion of a floor and ceiling and part of the connecting devices. Fig. 2 is a similar perspective of the framework which supports the floor and ceiling and is itself carried by the beams of the building. Fig. 3 is a longitudinal vertical section of one of the spans between the fioor-beams, showing one of the trusses in side elevation. Fig. 4 is a transverse vertical section of three of the trusses, showing in side elevation the bridging for bracing the trusses. Fig. 5 is a top plan of three of the trusses and the bridging between the same broken away at the right to show the lower members of the trusses, and Fig. 6 is a side elevation of the adjacent ends of two of the lower members of the trusses.

Referring to the figures, A represents a series of floor-beams carried by a suitable frameworkin the ordinarymanner, and B represents a series of trusses supported upon and embracing the floor-beams. The floor-beams are preferably what are known as I-beams, and the trusses are preferably composed of two bars I) b, the upper, I), being a T-iron having its vertical flange resting upon the top of the I-beam and the lower, I), being a flat bar or web and extending just beneath Serial No. 716,505. jute model.)

the bottoms of the'I-beams. Notches b are cut out of the upper corners of the webs, in which the lower flanges of the I-beams rest. The T-iron'and web are connected between their ends by vertical struts or hangers b b and diagonal, braces 19 b 6 5 The web Z) is supported at its ends upon the lower flange of the I-beamsbymeans of short bars or plates b b and is supported from the T-iron by means of hangers b if. the webs and immediately below the I-beams are secured angle-irons b", adapted to stiffen the webs and to form supports for a second or safety ceiling I, hereinafter described, the bottom edge'of the web b being far enough Upon each side of below the angle-iron to produce a consider- 'able air-space between the ceiling proper and the safety-ceiling. This completes the truss, and in the erection of the buildings these trusses are constructed at the most convenient place and taken to the building all ready to be slipped between the I-beams. The diiferent trusses are braced one from another by means of bridging C after the trusse'sare placed in position. The adjacent ends of the T-irons and webs are preferably connected by plates or stout wires b to strengthen the structure.

The fioor is constructed by securing wire mesh D upon the tops of the trusses, placing concrete E and furring-strips F upon the wire mesh D, and securing the floor in the ordinary manner to the furring-strips.

In the construction of the ceiling the ordinary wire lath G is secured to the webs b of the trusses and plaster H applied to the wire lath in the usual manner, and in addition thereto a second or safety ceiling I, consisting of what are known as plaster-boards, is laid upon the horizontal flanges of the angleirons b". This plaster-board is preferably provided with a tongue and groove to make a tight ceiling, and as it can be slipped beneath the I-beams it assists in thoroughly isolating the latter from the heat of the fire.

This construction while containing all of the fire-resistin g qualities of the heavier con' structions has only a fraction of the weight of the latter and is much cheaper, not only in its own cost, but also in the saving it effects in the necessary strength of other portions of the structure, due to the relief thereb bft-t nsy semem ersz upp e by of from the. immense weight of the ordinary fireproof floors. The horizontal flanges of the lower T-irons separate the two portions of the double ceiling, leaving an air-space between the same, which protects the upper ceiling and the parts above it until the'lower is completely burned away. To further protect thefnrring-strips .F from fire, asbestos linings may be placed beneath them, as seen at O in Fig. 1. it

The particnlar reconstruction .herein described in detail may be Variedgreatly without departing from myiinvention' andel do not therefore limit myself to its specific detailsexceptso far as the same may be essential to thc same. a. r l

1, claim as new and desire to secure by Leta-i W a 1,; r v. "-"w e b i ding construct on, t e

h. hr ri s -hqr zqnta -iflc mhe f;a, 1

Qfl-a r ew i sse spapnimg hQill fili al etw enr. aid; b ms mmpos rlto co n t pp and low r-lon inal. 1 9mbem r men fi whi es tupo rt ietep ct the dh eams andthelettr arearm ged hepea h the. onnect ng slexi ealhet ewgth .19w rr ber ran it tqsuppo s id eaermem e sl fr mab d ipab t en th tr s 1 the dp t e ,e ra-c ing supported from the, bottoms of the same; substantially n r beih rT e om mat oniwith;

meteor-b am ra sllh y na h ialow .des

nii nlane bel wrt tlet x, arce 6-,, belo @sa mem ers-L and, usp ilsi de herefr r d a leafle s-c ling carried; bblrfi lir members and,passing, below the flQOlT-gbflfllilS atsome distance above the ceiling first mentioned.

this

3. In abiiilding construction, the combina= tion with a series of I-beams, floor-supporting members, resting upon the top of said I-beams, ceiling supporting members sup: ported against the b ottom faces of the I-beams, hanger-sit, b, connecting the floor-supporting members and ceilingsupporting members a d arra djacen ot aid, Lb am and the bars", b b secured to the ceiling-sup-' porting members, and resting upon the lower flanges of the I-beams; substantially as described.

-, 4. The combination with a series of I-beams, A, of a series of transversely extending trusses, mprisin A u s antiallyi -ir ns, b, restinann ethe tens 9f the L-br emsr W .lzfmxte siip he p; he establish-aqua bi, s mu'edJipQasai r d inafl, conn nterm diate; Q l lis PM scs ired o. he lever d r rthe Webs,

a seconsli nrsatetyre 11mg l'Q$P lP0n,I horizontal flanges of the angle-irons; subed esaml ase cm icei ie restin e'p tile witnes er q iy naeateise my hand, at lq c g n, me qqun y t .06 1; n

State of Illinois, this 8th day of May, A. D.

1899. l :1. ,L L:

TIMOTHY OSHEA.

Witnesses t L 4 M: 1G" IEN:

CHAS. O. SHERVEY.

a gsgme distance above the ceilingfirst men-

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