MIL-HDBK-1001/5A
f) Limit plywood to 5/8 inch (16 millimeters) minimum thickness, smooth-surfaced exterior grade, with edge support limiting differential deflection of adjacent panels to 1/8 inch (3 millimeters) at panel edges and 1/16 inch (2 millimeters) at ends;
g) Do not specify fluid-applied synthetic membranes when substrate joint movement is anticipated;
h) Consider repairability in case of future damage. i) Roof deck structural capacity: For loose-laid,
ballasted systems, design for additional 10 to 25 psf (0.0005 to
0.0012 Pascal) dead-load capacity for ballast and/or concrete
pavers;
j) If there is waste spillage or exhaust onto roof surface, determine the nature of waste material. Periodic roof wash-down may be required; or other special membrane maintenance;
k) Check compatibility of adhesives, films and insulations.
l) Do not permit "torching" of modified bitumen sheets on buildings with combustible substrate components.
6.4 Applicable Details. Refer to SMACNA Architectural
Sheet Metal Manual or manufacturers' information.
6.5 Single-Ply Membrane Standards. Where applicable, standards to be used for single-ply membrane materials are promulgated by the Rubber Manufacturers Association (RMA), American Society of Testing and Materials (ASTM), and the Canadian General Standards Board (CGSB).
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