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1952 Theatre Catalog, 10th Edition, Page 228 (194)

1952 Theatre Catalog, 10th Edition
1952 Theatre Catalog
1952 Theatre Catalog, 10th Edition, Page 228
Page 228

1952 Theatre Catalog, 10th Edition, Page 228

struction. Aluminum is approximately one third the weight of galvanized steel of equal gauge.

Aluminum roofing materials are inherently non-toxic, therefore rainwater may be safely collected from aluminumsurfaced roofs for cistern or stock use, unless contaminated from other sources. This benefit may be extended by the use of aluminum eaves, troughs, and conductor pipe.

Fire resistance is an important advantage to be considered in several locations at the drive-in such as the projection building, storage rooms, and offices, and aluminum construction offers this protection.

These advantages e elimination of painting, ease of application, low cost of handling and transportation due to light weight, improved insulation, continued attractive appearance, and long lifeepoint to the long-range economy offered by aluminum sheeting.


Standard Aluminum Corruga'l'ion

Standard aluminum corrugation is produced in two popular styles, identified as the 1%" type and the 21/2" type. Both are produced in 26 US. standard gauge .019" thickness and 24 US. standard gauge thickness, and both sizes are produced in mill finish as well as stippleembossed finish. Both 21/2" and 1%" corrugated types are made in lengths of 6, 7, 8, 9, 10, 11, and 12 feet.

Both edgmwm in m. gammy-1

V. 26'OVERALL lO moses 9 VALLEYS


. OVERALL 26" '10 RIDGES 20 VALLEYS 13?:

a... m. at. E... m... om w... w waovemee WITH 17. c0212. LAPPED 4

FIG. 1. 21/2" Standard Aluminum Corrugation (U. 5. Sid. 26 96. .019" and U. 5. Sid. 24 go. .024").

Both sizes of standard aluminum corrugation can be applied with equal ease. Selection between the two sizes often results from the drive-in owners preference for the narrow lines of the 11/1" type or the wide lines of the 21/2" pitch corrugation. Following are some factors to be considered in selection:

1. The 24-gauge thickness provides greater rigidity, more resistance to denting, more resistance to wind action, and supports greater loads than the lighter 26-gauge. However, where roof load is not a factor, and installed sheets are not subject to denting action, the 26-gauge thickness is entirely satisfactory.

2. The 11/4" size tends to provide a neater appearance for small buildings. '

3. The 1%" size provides slightly more coverage per sheet.

4. The 1%" size provides a closer pattern of nailing centers.

5. The 1%" size is more easily formed to curved surfaces due to its shallower depth of corrugation.


6. The 2%" size carries a greater load than the 114" size.

7. The 21/2/l size offers greater resistance to bending or crimping on side walls.

iv." corrugation

2V2" Conugalian


l (on. lap-24%" coverage used for riding only


1vz corr. Inn-24" camuga Min. in for roof sheet 2v, can, [up desirable

I Corr. lap-24" coverage used for siding only

iv, (arr. sup-22v." (average Min. lap for roof me:

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21/1 (on. lap-223A" (average 2 (orr. lap-21%" tonnage

FIG. 2. Coverages: Exposed edge is always turned down. 11/4" has one edge up and one down. Reverse sheets to lap in same direction.

8. Since the nails are driven in the crown of the corrugation, nail heads in the 21/2" size are kept higher above the water line during rain run-off. For roof slopes 10 feet to 12 feet in length, this feature is not of great importance, but for roofs having slopes longer than 12 feet, or multiple sheet courses, the deeper channels offered by the 21/2" pitch becomes more eHective.

In order to give surfaces covered with aluminum sheeting a finished appearance as well as to afford extra protection against the weather, various types of accessory fittings are used, such as flashings, ridges, valleys, and closures.


Roof Decks

When corrugated aluminum sheeting is to be applied to the roofs of confection stands, projection booths. or other buildings, the roof deck should be sound and sufficiently strong to support the weight of the workmen as well as the snow loads and wind loads to which it will be subjected. Deck boards should be firm enough to grip and hold the nails used for applying the roof sheets, and should be dry and seasoned.

At least one thickness of 15-pound asphalt saturated felt is recommended between the deck boards and the, roof sheets in all cases. Drip strips on the edges of the deck at the gable ends and eaves aid in preserving the life of the decking.

The solid type deck is preferred, since it reduces wind action and helps prevent the formation of condensation on the under side of roof sheets. Where open or slatted type decks are used, openings should be less than eight inches for best results.

Applying Roof Sheets

Start the first sheet at the lower corner of the roof, at the end opposite the direction of prevailing winds. When the 2%" size is to be applied with the minimum side lap of one and a half corrugations, the direction of side laps

are alternated with each sheet, which, in this case, omits the prevailing wind rule.

Extend the lower end of the sheet one inch to two inches below the roof edge to form a drip edge. Allow one corrugation to extend over the gable end. Turn this down and nail it on four-inch centers at the gable end facia. Good alignment of sheets, both horizontally and vertically, will aid in making a neat, attractive job. Apply the second sheet with the edge overlapped so that the exposed edge is turned down. The 11:?" corrugated sheeting is supplied with one edge turned up and the other turned down, thus the exposed edge can be positioned for the desired lap by reversing the sheets to lap all edges in the same direction. Nail with 1%" length 10-gauge aluminum roofing nails with Neoprene sealing washers attached.

ms! row sum No v

NAM on r' cmvus in cm: mo


FIG. 3. Starting First Sheet: Start at low-er corner in the opposite direction of the prevailing wmd.

The third sheet may be applied either above the first sheet or beside the second sheet, depending on the procedure most suitable to the applicator; either method is equally satisfactory. In multiple course roofs having a rise of four feet or more, the upper sheets are lapped a minimum of six inches over the next lower sheet. The minimum rise for roof slopes having one row of sheets only is three inches per foot. For multiple row slopes up to 24 feet, the minimum is four inches. Slopes in excess of 24 feet should have a rise of over four inches per foot.

Continue the courses across the roof to the opposite gable end, keeping the lower course at least one sheet ahead of the next upper row. Finish the last sheets at the gable end similar to the method outlined for starting the first sheet. The final sheet in each row may be overlapped a few extra corrugations to bring the sheet width out right for suitable turn down at the gable end.

Nail end laps and eaves at every other corrugation on the 2%" size, and allow two corrugations between nails on the 1%" size. Nail side laps at intervals of approximately eight inches. Space three nails equally through the center of each sheet vertically for sheets up to eight-foot lengths, and four nails for sheets over that size. Space three nails horizontally through the center of each sheet.

The following table lists the number of aluminum nails per sheet required for various sheet lengths:

1952 Theatre Catalog, 10th Edition, Page 228