Fire Wall Under Roof Detail

The project has m and s2 occupancies with some of the s2 separated with a 2hr fire barrier wall.

Fire wall under roof detail.

Cold roof insulation between rafters wnapor barrier on warm side below orw sheatiiing roofing roofing 2 x 8 sleepers notched for vent aligned wi rafters flashing over rooang fascia sheatiiing 2 x 4 sleepers aligned w rafters provide. Construction is type v b so there is no general requirement to rate the roof deck assembly. The detail drawings are grouped by details and can be downloaded below in dwg or pdf format. Fire barrier walls are typically continuous from an exterior wall to an exterior wall or from a floor below to a floor or roof above or from one fire barrier wall to another fire barrier wall having a fire resistance rating equal to or greater than the required rating for the application.

Hold your cursor over the file name to view when a drawing was last updated. I was wondering what you might think about the required detail for a head of wall joint at a fire barrier wall in the following case. Proven performance since the great fire of london. These listings are short summaries to serve as a.

Horizontal and vertical movement in walls arises from thermal and other effects clearances are required to permit movement and prevent damage to firewalls. Other roof protrustions sothat notiiing obstructs tiieflow ofair from eave to ridge. Roof wall flashing detail specifications snafus. Fire walls in stepped buildings must extend 30 inches above the lower roof surface and for 15 feet above the lower roof the exterior wall must be protected with 1 hour fire resistive construction and any openings in the protected area must have a minimum fire protection rating of at.

The code is 2009 ibc. Figure 9 vertical extension of fire wall through roof. Parapet and end wall details are important to prevent fire spread in certain types of construction. Fire walls shall have sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall for the duration of time indicated by the required fire resistance rating or shall be constructed as double fire walls in accordance with nfpa 221.

And in our experience when a single piece of flashing extends only a few inches under the shingles especially on a long roof slope and worse on a roof that happens to slope slightly towards rather than away from the abutting vertical building wall the accumulated roof drainage water.