US1632453A - Building construction - Google Patents

Description

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l atented dune il tl, lil tlllu CQEPORA'EIQH, 01F NEW YURK, lil'. iii, A FCGRPOEATIUN GE DELihW-QM BUHLDJING- CONfi'ElL'UGTIQhl.

Application filed April d, whit. serial Ito. sense.

This invention relates to a building con struction and more particularly to a ceiling construction composed of pro-cast slabs o gypsum or like plastic material.

The invention has for an object to provide a novel and improved ceiling construction which is adapted to aflord the floor frame superior protection from fire, which comprises a plurality of pro-cast slabs of plastic material suspended from the members of the floor trams in a novel manner to provide a substantially continuous body of the plastic material beneath the floor beams and at the same time to enable the slabs to be erected in a simple, economical and highly convenient manner, without requiringthe use of scaflclding to form a substantially flat ceiling below the door beams.

A further object of the invention is to provide a novel and improved ceiling construction comprising pro-cast slabs of plastic material, in which the individual slabs are suspended from and below the floor member in a novel and improved manner adapted to enable the slabs to beconveniently suspended at any desired distance and at a uniform distance below the floor beams, and at the same time to insure the production of a substantially fiatceiling.

To these ends the ceiling comprises a plu-= rality of precast slabs of plastic material which are in accordance with the present invention suspended om and below the door beams by sus ension members attached to the floor beam and which strear ranged to cooperate with devices embedded in the slab and which 1 *efect from the ends thereof. In the preiwfed form of the in vention, longitudinal ntorcing members are embedded in the abs and toe ends ct such members are preferably arranged to project through slots or recesses in the ends of the slabs and beyond the ends of the slabs, so that when the slabs are erected and in abutting relation to one another, the ends ot the reentercing members at one slab extend into the recesses in the end ofslabs l2, 13 are will be hereinafter described and particu larly pointed out in the claims at the end of this specification.

ln the drawing illustrating the preferred form of the invention, Figure 1 is a sectional View illustrating one of the floor beams or members and the manner of suspension of abutting ceiling slabs from the floor beam; Fig. 2 is a sectional viewtalren on the line 2-2 of Fig. 1; Fig. 3 is a sectional view illustratin an alternate construction or method ot suspension of the ceiling slabs; Fig. i is a sectional view illustrating the manner in which the ceiling slabs may be suspended at a distance below the floor beam; Fig. 5 is a sectional View on the line 55 of Fig. l.

Referrin' to the drawing, 10 represents one of the cor beams of a floor frame which is herein shown as comprising a channel bar but which may comprise any of the usual forms of floor members or beams employed in building construction. 12,18 represent portions of precast-ceiling slabs of gypsum or other plastic material which are preferably reenforced to impart additional strength thereto.- As herein shown, the ceiling slabs 12, Bars provided with longitu- ,dinalreentorcin members, one of which is shown in each s ab as 15, 16. The ceiling suspended from the floor beams 10 with each slab spanning the space between two of the iloonbeams l0 and with adjacent slabs in abutting relation to form a substantially ceiling below the ceiling slabs, and in the preferred form of the in vention the ends of the reenforcing members 15, 16 are arranged to project beyond the ends of the slab, and a suspension member 22, herein shown as a hanger, is attached t to the lilOOI' beam 10 and arranged to engage and cooperate with the projecting end portions of the reentorcing members. The su pension member or hanger 29. preferably comprisesa fiat steel bar, the upper end of which is bent around the top flange of the channel floor beam 10 to secure Y? hanger thereon. The hanger is arranged to extend directly down along rear face of the Web of the channel 10 project slightly below the lower flan oi? the channel. The lower end the hanger 22 terminates and provided with an opei may. a surest to permit the pee.

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of the projecting ends of the reenforcing members 15, 16, which project from the ends of adjacent slabs. In order'to accommodate these projecting end portions of the reenforcin members 15, 16 to permit the adjacent sabs to assume an abutting relation, the ends of the slabs 12, 13 are provided with notched out portions or open slots 20 The slots 20 are preferably arranged with respect to the reenforcing mem-- bers 15, 16, so that the projecting ends of the reenforcing members extend through the slots 20 to beyond the ends of the slabs, and the slots 20 are of such a width as to enable the projecting ends of the reenforcing members of one slab to extend into the .corresponding slot in the end of the adjacent sla In practice, the slabs 12, 13 may be erected with the lower end of the hanger 22 extended downwardly into the space between the ends of the abutting slabs in the manner illustrated in Fig. 3, but it is preferred to form the openings or slots 20 sufliciently deep to accommodate the end of the hanger. In Fig. 1 I have illustrated the slot 20 as comprising an initial portion 27 of greater depth than the main body of the slot 20 and forming therewith a shoulder 28 against which the end of the hanger 22 may rest. With this construction, it will be observed that the lower end of the hanger 22 is protected against fire by a substantial body of the plastic material comprising the lower portion of the slab itself. It is also preferred to provide the ends of the slabs with a rabbet 32 which is adapted to permit grout or other plastic material to be pouredunder the lower flange 24 of the floor beam 10 after the slabs have been erected.

The suspension members or him ers 22 referably comprise as above stated at steel ers, and in practice the hangers 22 may be formed with an initial right-angled bend at the corner 30. and shipped to the job in this form. The erector then applies the hanger to the floor beam 10, bending the upper end thereof around the top flange 23 of the floor beam. This may be readily and conveniently done by a hammer. With this construction of hanger it is possible to obtain a uniform spacing of the slabs 12, 13 below the floor beam inasmuch as the bend 30 may be of a definite distancefrom the lower end of thehanger, and the erector by placing the hangers over the top flange of the floor beam causes the slots 26 to assume a definite position with relation to the bottom of the floor beam, so that as the slabs are erected with the projecting ends of the reenforcing members inserted through the slots 26 in the hanger, the slabs are caused to be positioned at a uniform level and a flat ceiling at a substantially uniform level is insured. In practice it is sometimes desirneaaaae able that the cealing slabs 12, 13 be spaced some distance below the floor beams in order to permit the passage of conduits and wires between the ceiling andthe floor beam, and for this purpose the hangers 22 may be made of a greater length than the-hangers ordinarily employed andthe ceiling slabs suspended in the manner described in connection with the construction illustrated in Figs. 1 and 3, using the elongatedhanger. It is preferred to providean additional strap 35 riveted or otherwise secured to the hanger which may be conveniently bent around the lower flange 24 of the floor beam in order to impart additional rigidity to the ceiling construction.

In order to erect the floor slabs it isnecessary for the erector merely to position the hangers 22 over one of the floor beams and insert the ends of the reenforcing members projecting from one end of the ceiling slab through the slots 26 in the hangers. The second set of hangers are then slipped over the ends of the reenforcing members which project from the opposite end of the slab,

and are then positioned upon the next floor.

beam and the upper end of the hanger hammered around the upper flange of the floor beam. In this manner the erector may erect the ceiling without requiring scaffolding, as all of the work may be done by the erector standing upon the top of the floor beams.

After the slabs have been erected to form the ceiling, grout or other plastic material may be poured into the slots 20 and the rabbet 32, and when set the grout serves to inchor the hanger to the reenforcing memers.

While the preferred embodiment of the invention has been illustrated and described, it may be embodied in other forms within the scope of the following claims.

Having thusdescribed the invention, what is claimed is 1. The combination with a floor beam of two pre-cast ceiling slabs of plastic material located below said floor beam in substantially abutting relation, and means for suspending said slabs from the floor beam comprising a device attached to and depending from the fioor beam, and means 'embedded'in and projecting from the adjacent ends of each slab and engaging said device.

2. The combination with a floor beam, of a pre-c'ast ceiling slab of plastic material provided with a slot in the end thereof, a device embedded in the slab and extended into said slot, and means attached tov the floor beam and engaging said, device within the slot for suspending the slab below the floor beam. x

3. The combination with afloor beam of two pre-cast ceiling slabs of plastic material located below said floor beam and in substantially abutting relation, provided with lltl ran

longitudinal reenforcing ,members embedded therein and projecting from the adjacent ends of said slabs, anda member attached to the floor beam and en aging the projecting portions of the reeni orcing members for suspending the slabs from the floor beam.

4. The combination with a floor beam of two pre-cast ceiling slabs of plastic material located below the floor beam and in substantially abutting relation, and each provided with longitudinal reenforcing members embedded therein and projecting from the adjacent ends thereof, openings in the ends of said ceiling slabs for receiving the projecting ends of the reenforcin members when the slabs are in abutting relation, and a member attached to the floor beam and cooperatin with both reenforcing members for snspendin the slabs from the cor beam. 5. The com ination with a floor beam, of two pre-cast ceiling slabs of plastic material,

provided at their adjacent ends with slots extending downward from the upper .surface thereof and terminating above the bottom of the slab to rovide a substantial body of plastic materia below the bottomof the slots, devices embedded in the slabs and extended into said slots, and a hanger attached to the floor beam projecting into said slot and cooperating with the devices in said slot.

6. The combination with a floor frame havin members spaced apart, of a ceiling extend the same and composed of re-cast sla s of plastic material having reen orcing members,

7 suspended from said ed under said members to fire roof and hangers for said slabs en aged with said floor members and having eir lower ends extended between adjacent slabs and enga ed with the reenforcin members of both sla s below-the upper sur aces of said slabs.

7. The combination with a floor frame havin membersispaced a art, of a ceiling exten ed under said mem rs to fire roof the same and composed of pre-cast sla s of plastic material govided with longitudinal reenforcing mem rs embedded therein and projecting from the ends thereof, and hangers on the floor members provided with openings into which the ends of the corresponding reenforcing members of abutting slabs project to suspend the slabs from the floor mem rs.

8. In a building construction, in combination, a floor frame provided with a plurality of floor members spaced apart, and a continuous flat ceilin located below and cor members and composed of a plurality of pro-cast slabs of plastic material of substantial thickness havmg reenforcing means embedded therein and arranged with each slab spanning the space betweentwo of the floor members, and hanger members en ging the floor members, and having their lower ends, extended between abutting slabs and engaging thereenforcement of I 0th slabs.

In testimony whereof, I have signed my name to this specification.

' THOMAS ROWAN.

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