1 Hour Roof Construction

I would like to apply the drywall directly to the bottom of the truss and also have insulation for sound control.

1 hour roof construction. Is this possible without using channels and what ul number would i use. Some building jurisdictions now require a fire watch for a minimum of one hour after the last roofing torch has been extinguished. Ibc table 722 6 2 2 allows 10 minutes for wood floor or roof joists at 16 o c. Use flat horizontal soffits see figure 3 instead of attaching the soffits to the sloped joists which creates sloped soffits.

Both are burn through tests and the ultimate roof systems rating is the lowest of the three tests. The brands consist of an ignited wood lattice placed directly on top of the test specimen. I am looking for a 1 hour roof ceiling assembly for wood truss construction. According to the engineered wood association a one hour rating indicates that a wall constructed in a manner similar to the one tested will contain flames and high temperatures and support its full load for at least one hour after the fire begins.

Here you can find drawings for our ul fire rated floor assemblies and ul fire rated ceiling assemblies. During construction there are many opportunities for accidental ignition including welding of steel and the use of torches on modified bituminous roof membranes. Ibc section 722 6 could be used to calculate up to a 1 hour rating for a wood frame wall floor or roof assembly. A minimum 1 hour fire resistance rating to prevent embers and hot gases from making contact with the joists rafters or trusses or the underside of the roof decking.

The class a brand weighs 2 000 grams class b 500 grams and class c 9 1 4 grams. No minimum joist size is given except that it needs to be adequate for structural loads. To the centerline of a street an alley or public way. One hour roof ceiling assembly.

To the closest interior lot line. The section details the procedures for calculating fire resistance of walls floor ceiling and roof ceiling assemblies. Failure is defined as the point where the roof deck. Wall framing whichever is closer to one of the following.

What you ll eventually learn is that the easiest place to design your own 1 hour assembly is section 721 6 of the international building code. To an imaginary line between two buildings on the lot.