fenestra metal deck
 

fenestra metal deck
hello.
i am looking at a building constructed in 1957. the client wants the low roof checked for snow drift loads due to a collapse last year in a different building. the low roof has metal deck shown on the plan. the metal deck general note calls out "metal deck and "tac" panel - fenestra or equal. see specs." the specs are not available. callouts on the roof plan include 6" 16d-16x24", 6" 16d-18x24", 4 1/2" x 14ga. "e" deck, and 4 1/2" x 18ga. "e". does anyone know where i can find information about fenestra or an equal product from around 1957?
thank you.