> > > >

1952 Theatre Catalog, 10th Edition, Page 230 (196)

1952 Theatre Catalog, 10th Edition
1952 Theatre Catalog
1952 Theatre Catalog, 10th Edition, Page 230
Page 230

1952 Theatre Catalog, 10th Edition, Page 230

corrugations. Good alignment of the sheets, both horizontally and vertically, will aid in providing a neat and attractive job. Continue the first row of sheets to the opposite corner of the structure. Upper rows of sheets should overlap the next lower sheets a minimum of four inches. End laps should be positioned only over supporting members for secure fastening. Nailing should be at every other corrugation at bottom and end laps for the 21/2" size, and a space of two corrugations between nails should be provided for with the 1%" type sheeting. Three nails should be evenly spaced horizontally at intervals of about 30" between the end laps. Nail sizes and types should be identical with those specified for roofing. Nailing of the side laps should be on 8" to 10" centers. Where wider spacing of the supporting members will not accommodate nailing, fasten side laps with aluminum sheet metal screws on 8" to 10" centers.


Aluminum corrugation may be cut with snips, a metal-cutting hand saw, hack saw, band saw, circular bench saw, skill saw, or with similar tools.

When the cutting is done by hand, large snips are most commonly used for cutting across the sheet or making angular cuts. Good practice is to scribe a line at the desired cutting point. Start the cut at the largest piece, or the largest piece requiring a finished edge to your right. As cutting proceeds, coil the piece to the left in an upward direction, allowing the snips to follow the contour waves of corrugation. Lengthwise hand cutting can be done more readin with a metalcutting hand saw or by breaking the sheeting to a deeply scribed line.

FIG. 7. Cut Out Detail: Showing the scribe in the valley of the corrugation for a lengthwise cut.

For making notched cutouts in a sheet. use ships to cut across the sheet to the desired depth. Lay the sheet on a flat surface and, using a straight edge for a guide, scribe a line, preferably in the valley of the corrugation, for a lengthwise cut. Use a tool such as the sharpened tang of a file, a heavy scribe, or a linoleum knife for making the scribe line. Repeat the scribe operation about three times, with sufficient hand pressure to deepen the cut. Turn the sheet over, and place the straight edge along the back of the scribed line, then pull up the piece to be cut out and bend it back double to break it out. Be carcful in handling, as the cut edges are. sharp.

An alternate method of making lengthwise cuts by hand is by use of a taut wire and a board. Use a. board about one foot longer than the length of the sheet. Drive an eight-penny nail in one end of the board, then fasten a 16-gauge hard-drawn steel wire to the nail. Stretch the wire to the full length of the board, allowing an extension of at least two feet beyond the end of the board. Lay the sheet to be cut on top of the wire, with the cutting point directly over the wire. Lay narrow boards on each side of the cutting point on top of the sheet, and attach a one-foot section of broom handle to the end of the wire for a cross piece. Stand firmly on the boards beside the cutting point, and pull up on the wire to cut through the sheet.

Curved Sheets

Both 2%" and 1%" size corrugation may be applied on curved roof surfaces such as Gothic arches and curved arch roofs. Curving on the job may be done with the 21/2" size to a minimum radius of 28 feet, and with the 114" size to a minimum radius of 22 feet. Surfaces requiring curved sheets to radii smaller than these should be pre-curved on corrugation curving machines.

In applying sheets to be curved on the job, attach the lower end of the sheet first, with the top end free. Continue attachment of the sheet progressively from bottom to top, curving the sheet with downward pressure sufficient enough to bring the point of attachment tight. This procedure tends to keep edge laps tighter by reducing buckling in the central portion of the sheet. To obtain good alignment, the sheet should be held down into position prior to fastening the lower end in order to predetermine positioning for an accurate side lap, The sheet is then gradually released at the upper end, allowing the lower end to remain in place for fastening. This procedure is not necessary for pre-curved sheets, which conform to the curvature of the surface to be covered.

Each end of the sheets which are curved on the job should be secured with a minimum of four aluminum or zincplated bolts and nuts at least 3/16" in diameter. For the remainder of the sheet, spiral-shank aluminum nails are recommended for fastening. Clinching of the points on the under side will aid in secure fastening. Neoprene sealing washers should be used under the heads of machine screws and nails.

FIG. 8. Curving Corrugated Sheets on the Job: The lower end of the sheet is always attached first.

For good results with your application, the following general recommendations should be followed: '

1. Insulate aluminum sheets from dissimilar metals with aluminum-pigmented asphalt coating or an equivalent.

2. Insulate aluminum sheets from masonry with a coating such as mastic, asphalt or an equivalent.

3. Keep sheets dry prior to installing.

4. Store sheets on end or on edge ofi= the ground and in a dry location.

5. Do not let sheets come in contact with fertilizers, caustic soda, nitrates, lime, acids, or alkalies.

6. Do no make mixed installations of aluminum with copper products.

7. Use only aluminum accessories and fittings with aluminum roofing and siding.

8. Maintain deck spacing and girth spacing within recommendations.

9. Use ample hashing at apertures and protuberances.


Material Description

Aluminum roofing and siding sheets of the 5-V crimp type have five stid'ening crimps running the full length of the sheet. Each sheet has two inverted V crimps at each edge and a single inverted V crimp through the center. This type of aluminum sheeting is produced in both 26 US. standard gauge, .()19// thickness, and in 24 US. standard gauge, .024" thickness. Both thickneSSes are made in the embossed finish as well as the plain mill finish. ,

A feature incorporated in this sheeting is the fldry lap/i consisting of three cross ribs in the fiat area between the crimps at the lower edge of the sheet. These ribs stiffen the sheet at this point, thus providing an improved weather protection at the end lap.

Five-V crimp sheeting is produced in 26" overall width, having a covering width of 24", and in 6, 7, 8, 9, 10, 11, and 12 foot lengths.


For best results, solid decking or sheathing is recommended for 5-V crimp roofing. Open deck sheathing is sometimes used to obtain a lower cost roof. The roof decks should be constructed of dry and seasoned lumber of sufficient thickness to grip firmly and to hold the nails used for applying roof sheets. The deck should be strong enough to support the weight of workmen, as well as the snow and wind loads of the locality.

In solid sheathing, boards of 13/16" thickness are generally used, while in open deck sheathing, one-inch boards, four to eight inches in width, are spaced about six inches apart for best results.

A minimum of one layer of Iii-pound asphalt-saturated felt is recommended between the sheathing boards and the roof sheets in all applications. Drip strips, nailed along the edges of the boards at the eaves and gable ends on four to six-inch centers, will aid in preventing rotting of the, boards.

A starter strip for the gable ends can be made by cutting 5-V crimp sheets into three pieces and forming as


1952 Theatre Catalog, 10th Edition, Page 230