US1618768A

US1618768A - Roof construction

Info

Publication number: US1618768A
Application number: US18141A
Authority: US
Inventors: Herbert E Marks
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-03-25
Filing date: 1925-03-25
Publication date: 1927-02-22
Anticipated expiration: 1944-02-22

Description

Feb. 22 1927. 1,618,768

v H. E. MARKS ROOF CONSTRUCTION Filed March 25. 192,5

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HERBERT l. MARKS, F SEWICKLEY, PENNSYLVANIA..

ROOFv CONSTRUCTION.

application mea nasen 25,1925. serial 110.15141.

The invention relates to roof decksand to the construction of slabs for forming them, and the object is to 'provide a fireroof roof deck which is elfective for its Intended purpose, and which is very economical to construct, because. among other reasons, of the` simplicity of the slabs of which it is made, the lightness of their weight, and the ease with which they may be laid to forma deck. v

The invention isillustrated in the accompanyin drawings, of which Fig. 1 isa plan view o a portion of a roof deck; Fig. 2 a detail sectional view to enlarged scale taken on the line II--IL Fig. 1, showin a pair of adjacent slabs as they appear willen laid upon supporting members and before the roofris finished;y Fig. 3 a view similar to Fig. 2, show in the completion of a joint between the si es of adjacent slabs; Fig. 4 a detail sectional view to enlarged scale i taken on the line IV-IV, Fig. l; Fig. 5

a plan view of portions of adjacent sides of av pair of slabs showing modifications of construction, and Fig'. 6 a sectional view taken on the line VI-VI, Fig. 5.

In the practice of this invention a roof deck is formed of aplurality of slabs,each of which is made of a lurality of wooden boards of sullicient thic ess in proportion to their s an lengths to sustain a required roof loa The load-sustaining portions whichA enter into the construction of a slab are held in slab-formation, by a board of relproofing material which is firmly attac ed to the faces of the wooden boards and is suiciently rigid totie the boards togther and maintain them in the -form of a..

b. The preferred form of board for this purpose is what is known as a vplaster or gypsum board. While a single gypsum board may be used, it is preferred to use two, one attached to the lower, and the other to the upper faces of the wooden boards.

Having reference to the illustrati-ve cmbodment of the invention, a lroof deck is erally indicated in Fig. 1 as being di'lmed of a luralit of slabs A resting on purlins 41. e sla s may similarly rest upon suburlins or upon rafters, the term purlins ing here used as including both sub-purlins and rafters;'and the slabs may, as far as concerns some features of the invention, be otherwise suplported.

As shown in Fi 2 eac slab A is formed ,applied to adjacent slabs may be such 4of a plurality of wooden boards 2 having rigid boards 3 of fireproofing material attached to their lower faces. The wooden boards preferablyY have plane-faced sides as shown in Fig. 2, but may be dove-tailed, as indicated at 4 in Fig. 6. As previously explained, rigid boards 5 of fireprooiing material are preferably firmly attached to the top faces of boards 2'to assist the lower boards 3 in holding the wooden boards in slab formation, as well as to {ireproof the tops of the slabs. The attachment of the lower and upper boards 3 and 5 to the wooden core-forming boards 2 is preferably effected by nailing the former to the` latter asshown in Fig. 2, but may be effected by cementing the -fireprooiing boards to the wooden boards as indicated at-GinFig. 6, silica cement preferablybeing used for this purpose. v

In addition to the provision of rigid boards of ireproofing material for performing the double function of holding load-sustainin wooden boards in slab formation and o ireprooling their faces, the invention in its preferred form contemplates the provision of fireproofing material at the edges of the Y wooden boards at the sides of the slabs. This is preferably done by extending the ed es of lower boards 3 beyond the sides of sla s A, as indicated at 7 in Fig. 2, to form a support for oementitious frep'rooiing material which may be poured upon the projecting ends 7 'and between the adjacent sides of the wooden boards after the slabs have been laid in position. Such a filling of fireprooing materialpreferably of gypsum, is

indicated at 8 in 1g. 3.

It will be understood that unequal loads as cause suflicient deiiection of one slab with relation to the other to breakthe {ireprooinv seal 8 between the 'sides of the slabs, an j also to break or injure the waterproofing layer which is customarily applied to the M top of the deck. To resist such relative` as shown in Fig. 1. They may be, and preferably are, nailed to boards 2. as shown in Fig. 3, but may be cemented to them as shown in Fig. 6.

Instead of providing a monolithic fill 8 of fireproong material between the sides of adjacent slabs as shown in Fig. 3, the sides of the slabs may be iireproofed by applying to them bodies 10 of gypsum or other fireroofing material as indicated in Fig. 6.

hen this is done, both top and bottom boards 3L and 5 preferably extend beyond the wooden'boards 2 at the sides of the slabs to form pockets for receiving and holding the fireproofing bodies 10. When the slabs are so constructed, top boards 3Il are preferably notched ut at their edges at suitable intervals as indicated at 1l in Fig. 5, and plates 12 placed in the notches and attached to the upper faces of boards 2 to resist relative vertical movement between the adjacent sides of the slabs.

As shown particularly in Fig. 4. the ends of the slabs preferably rest upon the upper ianges of purlins l. To hold them in position their bottom faces may be provided with suitable attac-hing members, such as screw clips 15, constructed to engage the flanges of the purlins. For tying the slabs together at their ends, top plates 5 are preferably set back from the ends. and a j oint-spanninor plate 16 laid between their ends and nailed or otherwise attached to the upper faces of boards 2.

Assuming, by way of example and not of limitation, that roof purlins are spaced at six foot intervals, a slab may be formed of wooden boards about eightinches wide, one and a half inches thick and about six feet long. The space between adjacent sides of the slabs for receiving fireproofing material may be about one inch wide. The slabs may be made ata factory and shipped to the site of erection, or may be made at the site. In either case they may be formed at a. minimum cost. They are light in weight, and accordingly may be easily raised to a roof and easily manipulated to lay them upon supporting members. If the sides of the slabs are provided with a ireproofing material after the slabs have been laid in position, this may be quickly and economicallyA done by workmen standing upon the slabs.` Thereafter, the sides of the slabs are tied together by lates 9 or 12, and their ends by plates 16. fter the deck is completed it may be covered by any desired form of weaitther-proofing` or other protecting materia Not only is there manifest economy in the construction of the slabs and in laying a roof with them, but an indirect economy arises from their lightness in weight` because the supporting structure may be correspondingly lig t.

According to the provisions of the patent statutes, I have explained the principle and operation of my invention, and have illustrated and described what I now consider to represent its best embodiments. However, I desire to have it understood that, within the scope of the appended claims, the invention may be practicedby other forms of construction than that particularly shown and described.

I claim aslmy invention:

l. In a roof, the combination with spaced purlins, of a roof deck comprising a plurality of preformed slabs resting at their ends upon said purlins, each slab being formed of a plurality of load-sustaining Wooden boards having firmly attached to their lower faces rigid boards of fircproofing material holding the boards in slab formation, said boards of ireprooiing material projecting beyond the sides of the slabs, and cementitious ireprooting material at the sides of the slabs supported by said projecting portions of said ireproong boards.

2. In a roof, the combination with spaced purlins, of a roof dec-k comprising a plurality of preformed slabs resting at their ends upon said purlins, each slab comprising a plurality of load-sustaining Wooden boards having firmly attached to their lower faces a rigid board of fireprooing'material holding the wooden boards in slab formation, said boards of reproofing material projecting beyond the sides of the slabs, ccmentitious ireproofing material laid at the sides of the slabs upon said projecting portions of the ireprooiing boards, and a rigid plate spanning the adjacent sides of slabs and attached to their faces for resisting relative vertical movements of said slabs at their adjacent sides.

3. In a roof, the combination with spaced purlins, of a .roof deck comprising a plurality of preformed slabs restin at their ends upon said purlins, each s ab being formed of a plurality of load-sustaining wooden boards having rigid boards of fireproofing material irml attached to their upper and lower faces olding the wooden boards in slab formation for handling, said ireproofing boards on the lower faces of the slabs projecting be ond the sides of the slabs monolithic fil s of cementitious fireproodng material betweenthe sides of said slabs su ported by said rojecting portions of said re roofing boar s, and rlgid plates spanning t e adjacent side of slabs and attached to their faces for resisting relative vertical movements of the slabs at their adjacent sides.

4. In a roof, the combination with spaced purlins, ofa roof deck comprising a lurality of preformed slabs resting at t eir ends upon said purlins, each slab comprising a core forme of a plurality of load-sustaining wooden boards havin rigid boards yof reprooling material firm y attached to `boards on the upper faces of the sla s being set back from both sides of each slab, and rigid plates spanning the adjacent sides of slabs and attached to their upper faces for resisting relative vertical movements of the slabs at their adjacent sides.

5. In a roof, the combination with spaced purlins, of a roof deck comprising a plu- -rality of preformed slabs resting at their ends upon said purlins, each slab comprising a core formed of a plurality'of load-sustaining wooden boards having rigid gypsum slab, said boards firmly attached to their upper and Y, lower faces holding the wooden boards in slab formation prior to the laying of the psum boards on the lower faces of the sla s projecting beyond both sides of each slab, monolith1c fills of ireprooing cementitious material between the sides of adjacent slabsand supported by said projecting portions of fireprooting boards, said gypssum boards on the upper faces of the sla being set back from both sides of each slab, and rigid gypsum boards spanning the adjacent sides of slabs and attached to their upper faces for resisting relative vertical movements of the slabs at their adjacent sides.

6. A roof deck comprising spaced purlins, and a plurality of preformed slabs restin at their ends upon said purlins, each sla comprisin a core formed of a plurality of load-sustaining wooden boards having rigid boards of reprooling material attached to their upper and lower faces holding the wooden boards in slab formation prior to the laying of the slab, said fireprooing boards on the lower faces of the slabs projecting beyond both sides of each slab` monolithic fills of ireproofing cementitious material between the sides of adjacent slabs and supported by said projecting portions of ireproong boards, said lreproofing.

boards on the upper faces of the slabs bein setback from both sides of each slab rigi plates spanning the adjacent sides of slabs and attached to their upper faces for resisting relative vertical movements of the slabs at their adjacent sides, said fireproofing boards o'n the upper faces of the slabs beingv set back from the ends of the wooden boards, and rigid plates spanning the adjacent ends of slabs and attached to their upper faces between the ends of said u per fireprooin boards and tying the ends o the slabs toget er.

In testimony whereof, 'I sign my name.

HERBERT E. MARKS.