Requirements for Fire Wall Extension in Buildings with Sloped Roofs

Introduction

Fire Wall Extension in Buildings with Sloped Roofs.

Requirement :

When the roof on one side or both sides of the fire wall slopes towards the fire wall at a slope greater than 2 units vertical in 12 units horizontal (2:12), certain requirements need to be met.

Extension of the Fire Wall

The fire wall needs to extend to a certain height to effectively contain a potential fire. This height is calculated as follows:

1.    Measure the height of the roof located (4 ft.) 1200 mm (1.2 meters) from the fire wall.
2.   Add (30 in.)750 mm (0.75 meters) to this height.
3.  The fire wall should extend to this calculated height.
4.  However, if this calculation results in a height less than (30 in.)750 mm, then the fire wall should still extend to a minimum height of (30 in.) 750 mm.

In essence, the regulation ensures that the fire wall extends to a sufficient height to properly contain any fire that might occur in buildings with sloped roofs, based on the slope of the roof and its proximity to the fire wall.

Reference :

2021 International Building Code (IBC)-706.6.2Buildings with sloped roofs.

SBC 201-2018: 706.6.2 Buildings with sloped roofs