US2799232A - Roof structure - Google Patents

Description

July 16, 1957 L. w. JAEGER ROOF STRUCTURE Filed Dec. 24, 1954 y@ 1.a@ Mm" J a-gaaf JNVENICR.

' ATTORNEYS 2,799,232 ROOF STRUCTURE -Leon W. Jaeger, Buffalo, N. Y. Application December 24, 1954, Seal No. 477,517 2 Claims. (Cl. Hi8-13) This invention relates to a roof structure and method of fabricating the same, and more particularly to a lroof structure having conventional purlins, longitudinally corrugated metal roof sheets supported upon said purlins and extending crosswise or at right angles to the purlins, and a layer of insulation batts between the purlins and the corrugated metal roof sheets and running transversely of the purlins and with their edges in substantially abutting relation to one another and lwith their abutting edges in register with the spaces provided by corrugations in the roof panels.

The invention is directed to providing in such a roof structure members for bridging and supporting from their undersides, between the purlins, the abutting edges of the insulation batts.

One of the primary objects of the invention is to provide such support for these abutting edges of insulation batts which will not deteriorate, loosen or work away from their proper supporting position and will continue to support and also concealthese abutting edges for an indefinite period of time.

Another object of the present invention is to provide i such supports which are in the form :of simple metal strips which can be quickly placed in position and do not require any adhesive or fasteners to retain them in position.

Another important object of the invention is to provide such supports which are attractive in appearance, the strips imparting a sort of pillowed or quilted effect to the ceiling `of the Astructure by virtue of both the .purlins and the supports `being in compressive relation with the ybatts and dividing the insulation into rectangles pressed upwardly at their edges.

Another object of the invention is to provide such members which can be very easily and quickly placed in position by one having little skill.

Another object is to provide such supports which are very low in cost.

Other objects and advantages of the invention will be apparent from the following description and drawings in which:

Fig. l is a fragmentary, vertical section through a roof structure embodying the present invention, the section being taken on line 1-1 at right angles to the purlins or parallel with the supporting trusses or beams.

Fig. 2 is a fragmentary, vertical section taken on line 2-2 Fig. l.

Fig. 3 is a fragmentary, on line 3 3 Fig. l.

Fig. 4 is a fragmentary, perspective view of one end of the corrugated roof sheets forming part of the roof structure.

Fig. 5 is a perspective view of one of the longitudinally corrugated strips forming part of the roof structure embodying the present invention.

The invention is illustrated as embodied in a metal roof having the conventional trusses which are shown as being in the form of tapering I-beams inclined to vertical section taken generally nited States Patent-O Patented July 16, 1957 provide the desired pitch to the roof. On the upper flanges of these trusses 10 are secured purlins 11 which are uniformly spaced in horizontal rows ascending the trusses 10. Each purlin is shown as being of S-shape in cross section having a `central web 12, a bottom flange 13 extending from the web on one side thereof and having a reversely extending reinforcing bead or flange 14, and the purlin also having an upper flange 15 extending from the side of the web 12 opposite the llange 13 and also terminating in a reversely formed reinforcing bead or flange 16.

Before the roofing is applied, batts 20 of insulation are laid in edge-to-edge relation up ,and down the roof structure transversely of and upon the purlins 11. Each of these batts comprises a body 21 of fiber glass, rock wool, or other fibrous insulation having an upper face 22 and an under face 23 this latter face forming the exposed ceiling vof thereof structure. The opposite edges 24 of the batts are laid in abutting relation to one another.

After the batts 220 `have been so laid in edge-to-edge relation, the sheet metal roofing is applied. This sheet metal roofing is shown as comprising a plurality of interfitted metal ysheets v25 which can be made of aluminum or galvanized or otherwise protected steel and are sho-wn as having -a llongitudinally extending central corrugation 26 and two marginal corrugations 28, the corrugations all projecting .upwardly from the sheet. These metal sheets 25 are fastened to the purlins 11 by bolts, rivets, screws or nails (not shown) and compress the batts 20 against the purlins. As best shown in Fig. 2, the marginal corrugations of the successivey sheets 25 are adapted to be interitted and provide ridges in the roof through which water cannot vpass without having a head higher than the height of the ridge. Further, to secure against leakage through these ridges, the overlapped marginal corrugations 2S of the several sheets can be bolted together at their crests, .such bolts being illustrated at 29, and each having a nut 30 arranged Awithin the overlapped corrugation or ridge. It 4will :particularly be observed that access `to the shank of the bolts 29 for the purpose of applying its nut 30 can be had through the crack between the .abutting edges 24 of the batts 20. Thus, in order lto :apply 'the nuts 30 to the bolts 29, which have been previously inserted downwardly through the overlapped marginal corrugations 28, it is merely necessary for the operator to spread the adjacent edges of the batts 20, apply the nut 30 to the bolt, and tighten the same.

A roof constructed as above described is not entirely satisfactory for the reason that the cracks between the abutting edges 24 of the many insulation batts 20 are exposed on the underside or ceiling of the roof to the interior of the building. In laying these batts, it is impossible to have all of these abutting edges 24 snugly fitted together and, accordingly, open cracks are bound to occur through the layer of roof insulation at intervals. Warm air can, of course, escape through these cracks to be chilled by direct contact with the overlapped corru* gations 2S following which the cold air settles back into the enclosure. This, of course, represents a thermal loss and decrease in eiciency of the insulation. Also, the open cracks provide crevices for harboring insects and furthermore look unsightly, especially where some of the edges droop more than others.

It is the object of the present invention to overcome these disadvantages by the provision of very simple, easily applied, reliably held and loW cost supports.

In the practice of the present invention, the metal strips 35 illustrated in perspective in Fig. 5 are provided. These strips are made of sheet metal and can be of the same composition as the roof sheets 25. It is important that the length of these strips be slightly greater than the spacing of the several purlins 11 and that this length the strip be oiset laterally from the major plane of the strip and preferably in a direction opposite to that of the corrugation 36.

With a plurality of such strips 35 as illustrated in Fig. 5, the roof vstructure embodying the present invention can be completed. At each exposed crack between the abutting edges 24 of the batts 20, a strip 35 is brought up between the corresponding purlins 11. Preferably,

jecting upwardly and one end of this strip is slipped into ythis strip is placed with its central corrugation 36 pror the crack between the abutting edges 24 and the top of v the top ilange 15 of the corresponding purlin 11 from the side of this purlin opposite this top flange. This insertion of one end vof the plate 35 between the top of a purlin and the abutting edges 24 of the batts of insulation is permitted because directly above these abutting edges is disposed the corresponding overlapped marginal corrugations 28 and which provide the space into which the abutting edges of the insulation batts can be displaced, as best shown in Fig. 2.

The plate 35 is then moved endwise in the direction of its insertion of the purlin, as previously described, that is, upwardly or to the right as viewed in Fig. l, until its opposite end clears the face of the web 11 of the next succeeding lower purlin. With the tirst purlin as a fulcrum, the strip 35 is then swung upwardly until its opposite end is disposed above the top ange 15 of this next succeeding lower purlin. The metal strip 35 is then moved longitudinally in the opposite direction, or downwardly across the upper face of the top flange 15 of this next succeeding lower purlin 11, so that both ends of the strip 35 are sandwiched between the two purlins and the two batts of insulation. The opposite ends of the plates 35 are pressed against the purlins by the expansive pressure of the compressed batts. Thisis, of course, repeated at each exposed pair of abutting edges 24 of the batts 20.

It will be seen that the plates 35 can be very quickly placed in position and that, when once placed in position, they are reliably held in position by the pressure and friction of the upwardly displaced edges 24 of the insulation batts. It will further be seen that the plates adequately seal and conceal these abutting edges and are of themselves pleasing in appearance, as well as provide pleasing pillowed or quilted appearance to the underside or ceiling of the roof structure.

It will be further seen that these plates are very elective both in sealing and concealing the otherwise exposed edges of the insulated batts and accomplish the various objectives previously set forth.

I claim:

l. In a roof structure having spaced purlins, longitudinally corrugated metal rooting sheets supported upon and secured to said purlins and extending transversely of said purlins, and insulation batts interposed and compressed between and in Contact with said purlins and corrugated metal roofing sheets and running parallel with the corrugations of said roofing sheets with the longitudinal edges of said batts in substantially abutting relation to one another and with said abutting edges being in register with spaces provided by the upward projection of said corrugations; the combination therewith of a plurality of members for bridging successive pairs of said purlins and supporting from their undersides said abutting edges of said insulation batts, each of said members comprising a strip provided with an upwardly extending longitudinal corrugation contained within a corresponding one of said spaces and rendering each strip longitudinally rigid, and each of said longitudinally rigid strips being of substantially greater length than width with said width being approximately equal to the width of said spaces, and said length of each strip exceeding the distance between said purlins, said strips being disposed below said spaces with their opposite ends pressed against the upper faces of said purlins by the expansive pressure of said compressed batts whereby said strips provide rigid supports bridging the space between successive purlins and concealing and supporting from their undersides said abutting edges of said insulation batts.

2. A roof structure as set forth in claim l wherein said longitudinal corrugation of each strip is arranged centrally of its strip and wherein the opposite longitudinal edges of each strip is offset vertically to provide beveled edges.

References Cited in the file of this patent FOREIGN PATENTS 258,124 Great Britain of 1926 466,776 Great Britain of 1937 597,654 Great Britain of 1948

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