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MOTION PICTURE PROJECTION 469
COMMONWEALTH OF PENNSYLVANIA Moving Picture Act of May 1, 1909
Section 1. That it shall be unlawful for any person, firm, association, or corporation to erect, set up, construct, maintain, or use any permanent booth or enclosure for the purpose of operating therein moving picture machines, unless they are built, erected and constructed as follows:
Size: All permanent booths or enclosures to be at least seven feet high, the floor space to vary according to the number of machines in booths or enclosures, as follows:
One picture machine, six feet by eight feet.
One picture machine and one stereopticon, nine feet by eight feet.
Two picture machines and one stereopticon, twelve feet by eight feet.
The same to be made of structural steel as follows:
Four outside horizontal members at top and bottom.
Four corner uprights and members supporting roof, to be made of one and one-half inch by one and one-half by onefourth inch angle-irons.
Intermediate uprights to be spaced every two feet, and to be made of either one and one-half inch by one and one-half inch by one-fourth inch angle-irons or two inch by two inch by onefourth inch tee-irons.
Tee-irons, to which roof is attached, to be made of one and one-half inch by one and one-half inch by three-sixteenth inch tee-irons.
All joints to be made with a three-sixteenth inch steel plate, to which each angle-iron or tee-iron shall be riveted or bolted by the use of at least (2) one-fourth inch bolts or rivets.
All bolts or rivets in frame to have flat heads, said heads always to be placed on exterior side of booth; all angle or teeirons being so countersunk as to accomplish this result.
Frame to be built with a six-foot by two-foot doorway; frame of said doorway to be. built of one inch by one inch by threesixteenth inch angle-irons, which are to be joined together by the use of a three-sixteenth inch steel plate.
Covering of Booth: Sides and top of booth to be covered with asbestos boards of at least one-fourth inch in thickness; said boards to be cut and arranged that vertical joints between boards shall always come over an angle or tee-iron, so that both boards may be securely fastened to the same.