US2369487A - Sheet metal roofing material - Google Patents

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Patented Fehr. 13, 1945 This inventionlj-relates'tojroongrnaterial and is concerned JprimarilyWith the'vpifvision sheetlmetalr'oong which will overcome a num {ber-of objectionable features heretofore inherent injmetal rooting;n iaterials..v

i man. ochnfreeyoak, am; in.; assigixwr to Cecog fr f Steel Productsorporation, Omaha, Nebr., a. n "corporationofeltlebraska Y* ,Applicants Neve/aber;aguila-serial Nm 50H99 .roiainitglol.10s- 13) l u less durable-than sheet metalroofnfan *fur-f 5 ,-therxnorej because of its low tensilefandpu u re durabilityiin service, sheet metalispleferredfor roofing purposesv 'in, many` .i nsta`nces yover',wlfl'od shingles or composition shingles or' sheets;l Corrugated sheet metal roonghas heretofore-been `marketedonly in at sheet form.' )Suchrsheets were of variouswidths'and were made in 6,V '7, 8,

9,10, 1,1 and l2 foot lengths.v This largevariety lof'lengths wasrequired tol bestocked by: the Y dealers, because inthe employment/ofthe"sheets they arevlaid lengthwise of ,therafters' and 'the length of'sheets or ,combinations of lengths pur f-chasedby'any individual user will vdependupon the-length-of the roofi-from ridge to eaves, sov

thatthe-zcombinationof sheetsof the proper length overlapped at their'ends will just cover the space without cutting," f

If uncorrugated sheetsare employed, the side edges of adjacent sheets arefbentoutwardlyvfrom 'the plane of the sheets-'and fastened together on the roof by v'folding or kotherwise 'so asl to produce aseam projecting outwardly from the plane of ,thefro'off and extending' longitudinally vof the sheets. or',` in other words,y lengthwise of the rafters." In the case of corrugated sheets; thecorrugations at the :sides of lthe sheets are overlapped so as to; provide a water-tight joint. In any event, however, `.}whetherplainl or corrugated roong is desired, fthe dealeriscompelled to car-ry the wide variety vof lengths and, :onsequen'tly is required to stock an aggregate 'amount of thesesheets disproportionately large vin` proportion tohis 'This di'sadvantageousj feature of metal sheet roong materials does not apply tocomposition sheet materials which are sold in rolls each consistingv ofa-long rel`atiwel`y-` narrow strip of material adapted to -be laid {c'frosswise of the rafters-as resisting strength requires an! 'uninterrupted Aplane surface support upon which i'tigis; laid.vv Sh'eet'metal roong, on thec'ontraryywhenlcorrugated in wave form -or by having-strengt ,ning ribs struck up from its surface, possesses suicienty vstrength so that it neednot bezcontinuouslyf supported;l butthe roofbo'ards may-be spaced apart, thereby'reducing th'ef cost of construction. 'Ihe corrugated sheet Vmetal roofing contemf roofing.A 1

Another advantageous feature 'ofi'my vroof-lng material resides in the factv that itmaybe laid I in strips extending from end to end of the roof it is unrolled fromtheffroll.When the end of the roof isreached," thel stripmayfbe cut offvan'd the do started with the Ure next layer maybe ilai mainder-ofthe roll.

' The primary purpose ofmypesent inventionis te vproduce a' roll of lsheet metal roong1materia1gu which can be stored andv handledgas economically as composition roongpthereby relieving thefdeal-f ers of the necessity ofcarryinga large stoel; of.`

different length sheetsy heretofore deemejdnecf" essary.

` Composition roll roofingis recognized structure in the -same manner as composition roofing. Furthermore, a strip producedfin accordance with my invention is provided with corrugations extending transversely from edge to edge of the strip, which corrugations, when the strip is laid on the roof, extend in the direction of the rafters so as to aiord an unobstructed drainage from the roof in the valleys' between the elevated strengthening ribs of the material.

A further object of the invention is tofprovide corrugated sheet metal roofing in rolls which can be economically stored, can be readily unrolled on the roof when being applied, and shall have matching `corrugations tting the corresponding corrugations of the underlapped and overlapping strips associated therewith, and will provide upwardly projecting strengthening ribs through the crests of which nails may be driven into the underlying supporting structure without causing leakage around the fastening nails.

My invention furthery contemplates sealing the joint between overlapping strips of material by positioning a sealing strip therein as the overlapping strip islaid, thereby adding to the im- -perviousness4 of the roof ,so as to prevent wind Other purposes and' advantages of my inventionfshould be readily appreciated -as the same lbeSorties better understood by reference to the following v description when considered in' conlnection' with .the accompanying drawings.

AReferringto' thedrawings, a Fig.` '1.'is'v a fragmentary perspective view of a roofv-structureinfthe process of vbeing laid in ac'c'ordance-vwithmy invention; l

- ligifz.y is a1 fragmentary'plan view thereof;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2:

Fig. 4 is a perspective view of a roll of my sheet metal roofing;

Fig. 5 is a fragmentary plan view similar to Fig. 3 of a roof constructed of sheet metal strips transversely corrugated in wave-like form; and

Fig. 6 is a sectional view on the line 6-6 of Fi 5.

eferrlng to the drawings more in detail, reference character I indicates generally a portion of a building structure, such as a garage, having the usual rafters 8 which, in the present instance, instead of being closely covered by roof boards to form a substantially uninterrupted support for the roofing material (as would be necessary if roll composition roofing material were to be used), have an open structural cover consisting merely of a number of roof boards 9 extending crosswise of the rafters and spaced apart longitudinally of the rafters. The spacing of the roof boards, of course, may be varied, but it'is contemplated that a board under the overlapping portions of each strip of roof material will suffice.

The roong material is handled by the dealer and brought to the job in the form of a roll II, as shown in Fig. 4, consisting of a long relatively narrow strip of transversely corrugated sheet metalcoiled upon itself into the roll, as shown, and secured by ties I2. While the length of the roll which corresponds with the width of. the strip and the size of the roll which depends upon the length of the strip may be varied, it is believed that the most satisfactory dimensions may be such that each roll may be adapted to cover a square, or, in other words, one'hundred square feet of roof.' For instance, if the strip be 34 inches wide and designed to allow 4 inches for overlap, the length of the strip would be 40 feet. Other widths might be preferred, depending upon the gauge of metal employed andother factors,y

but preferably the length of the -strip would vary correspondingly, so that each roll Vwould furnish suiliclent material to cover a square.

For economical production it is contemplated that the strips will be cut to desired length and width from a large coil of sheet metal which has preferably been galvanized -before being rolled and delivered in coiled form. As the plain sheet is unrolled from the coil it can be passed through a corrugating machine which will form corrugations of the desired depth and contour therein, and if the sheet is of greater width than the strips, as is customary, it will be slitted into strips of the desired width. When the desired 1 length for a strip of corrugated roofing material to edge, the ribs along one margin being slightly wider, as indicated at Il, to overlie and rest lapped ribs and downwardly into the roof structure.

As a preventive against rain and wind blowing in between the overlapped strips, my invention contemplates the provision of a sealing strip I6, Fig. 1, of suitable composition such as tar paper, for instance, which may be laid along the upper margin of a previously laid strip as the next overlapping strip is unrolled, thereby disposing the sealing strip between the overlapping strips of roofing material so as to afford a weatherproof seal at the juncture of the strips.

The type of corrugations applied to the sheet metal strips is a matter of choice, and may be of any preferred design. As illustrative, however, ofv

another type differing from that shown in Figs. 1 to 4, inclusive, I have in Figs. 5 and 6 illustrated sheets provided with ordinary wave-like `corrugations which form the sheet into alternately disposed crests I'I and valleys I8. The sheets are laid and overlapped in the manner previously explained, except that in this instance the corrugations are of the same width at both margins of the strip, as will be evident from Fig. 6, wherein the corrugations in the overlapped sheet I9 are of the same dimensions as the corrugations in the overlapping sheet 2 I.

The dimensions and structural details of the strips of material, the manner of Producing the corrugations, and the manner of rolling as well as other details may be varied Within considerable limits within the scope of my invention as defined in the following claims.

I claim:

1. A roof structure, comprising rafters, roof boards disposed thereon in spaced apart relation, and strips of corrugated sheet metal roofing material overlying said boards and arranged in overlapping relation upwardly from the edges, said strips being laid crosswise of the rafters and corrugated transversely from edge to edge to provide alternate ridges and valleys extending lengthwise of the rafters, each of said strips before laying being of sufficient length to be coiled upon itself and delivered .to the place of use in the form of a roll equal in length to the Width of the strip and adapted to be unrolled horizontally so as to dispose the strip lengthwise' of the roof in position for fastening to the supporting structure of the roof.

2. A bundle of sheet metal roofing material of suitable width for laying in successively oversnugly upon the underlying ends of the ribs on lapping strips extending longitudinally of the roof, said material being provided with strength- `ening corrugations extending transversely from edge to edge thereof and shaped so that the lower margin of 'each strip when laid will nest with and fittingly overlie the upper margin of a previously laid strip, the material comprising said bundle being of much greater length than width and coiled upon itself to form a handleabla roll adapted to be unrolled and laid lengthwise of the roof with the transverselydisposed corrugations extending from ridge to eaves of the roof.

3. An article of manufacture, consisting of a st rip 0f sheet metal roofing material provided with transverse corrugations extending from edge to edge thereof and coiled into a cylindrical roll of a length correspondingwith the width of said of the roll provides an elongated strip adapted tov be laid lengthwise of a roof with the corrugations 0f one strip nesting with the corrugations of an asomar l r3 overlapping strip and extending in the direc.

tion of the slope ot the root. 4h; A roof structure, comprising, rafters; root boards disposed thereon in spaced relation, strips of corrugated sheet metal roong material over nate ridges and valleys extending lengthwise o f v10 A the. rafters, and sealing material disposed between the overlapping portions of -successive strips, each of said 'strips before layingbeing of sumcientf length to be coiled upon itself and delivered to the place of use in thejform of a roll 'equal inv length to the width oi! the vstrip and adapted to A he unrolled horizontally so as to dispose the:

strip lengthwise ot the roof in position for fastening to the supporting structure of the roof.

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