Frtw Roof Deck

New language in the 2018 ibc clarifies for building officials the regulations for using frtw in types i ii and iii construction which call for the use of non combustible materials or frtw.

Frtw roof deck.

Exterior fire x treated roof systems including roof supports trusses and decking may often be substituted for non combustible construction in open warehouses storage sheds and other structures with no penalty in the insurance rates or the building code classification of the structure. Metal and reinforced concrete beams or joists. Pyro guard was the first frtw fire retardant treated wood to be issued a code compliance report based on high temperature testing for roof sheathing and framing uses. And or frtw joists or trusses.

A roof deck system of frtw may be supported by. The 2018 international building code clarifies that fire retardant treated wood frtw manufactured without using the pressure process must be impregnated with chemicals. Ul evaluation report er7002 01 has been issued for pyro guard by underwriters laboratory confirming compliance with the international building code. This type of roof construction was classed as non combus tible even though the vapor barrier adhesive and roo ng used.

Roof deck fact check at one time roof assemblies were assumed to be re safe if the deck and its supports were of metal particularly when the re hazard of the building s contents were considered low to moder ate.