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1948-49 Theatre Catalog, 7th Edition, Page 253 (242)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 253
Page 253

1948-49 Theatre Catalog, 7th Edition, Page 253

Laminated Wood Masts 'for Screen Towers

A Strong, Economical Material Offering Great Ease and Speed in Construction Where Low Budgets Rule

Another application of glued laminated wood which may find wide use is that of the laminated mast. It is generally recognized that the key feature of most outdoor, drive-in motion picture theatres is their majestic screen, which must be big enough and high enough to be clearly seen by people spread over an area many times larger than the most spacious enclosed theatre. Because of the need for great height and size, the erection of the structure supporting the screen has presented one of the most difiicult engineering problems of outdoor theatre operation.

There is now available a simple, costsaving structural member for forming the screen supporting structure. Instead of complicated structures of steel, wood, or reinforced concrete, the main support for the screen consists simply of a row or laminated wood masts, which are attached directly to the foundation and run to the full height required for the screen. The masts themselves, along with purlines that are fitted between them, provide nailing surface for attaching

While the use of laminated wood arches in roofed-theatre construction is treated at great length elsewhere in this volume, the material ogers additional consideration by the builder of a drive-in theatre. Laminated wood masts in the required lengths can be fabricated and their weather resistant nature makes them superior to telegraph poles or other wood members which supported the screen towers of earlier theatres.

the transite or other material making up the screen.

Not only are erection costs maintained within economical limits because of the simplicity of the design, but additional

LOWER LEFT is an end view of a Rilco laminated wood mast anchored in upright position. Lower right shows the sturdy construction and the manner in which the braces torm an acceptable attics or storage space. Other adaptations are possible.

savings result from the fact that the masts can be hinged to their foundation of concrete and laid in a horizontal position while the purlines and screen are applied. After the entire structure is completed on the ground, it can be swung into position by cranes. The extensive scaffolding and temporary bracing characteristic of conventional construction are unnecessary.

Diagonal braces help to reinforce the perpendicular masts, and at the same time give the structure symmetry and provide an enclosed space for offices, ticket booths, and storage space.

The tall masts forming the basis of the screen structure are among the most interesting examples of new products developed by laminating wood to form built-up sections of dimensions that 0therwise would be impossible to obtain. And because' of modern metal timber connectors and new glues applied by methods that produce an extraordinary bond, these masts, like all the other glued laminated structural members, possess great strength.

1948-49 Theatre Catalog, 7th Edition, Page 253