Fire Blocking In Exterior Walls

One layer of 3 4 in.

Fire blocking in exterior walls. One layer of 3 4 in. This provides some additional fire protection benefits and will slow the spread of a fire up a wall by limiting the amount of. We will also go through some methods used in home construction to prevent the spread of a fire. Fire blocking is a blocking device inserted between the top plate of your exterior wall and the exterior masonry wall.

Opening up interior and exterior walls and ceiling reviled a perfect example of chimney walls inside and out connected to ceiling truss bays. Fire blocking between studs. Materials for fire blocking. It s purpose is to prevent the spread of smoke and flames from reaching the bottom of the 1st floor of your home from the basement area thereby burning through and spreading to the 1st floor of the home.

Particleboard covering any seams. The international building code ibc has fire blocking requirements that are intended to limit the spread of flames smoke and gases in combustible concealed spaces such as a wood frame wall cavity. Materials approved for fire blocking are just common building materials. Horizontal basement wall fire blocking fire blocking must also be installed every 10 horizontally along the wall irc 302 11 1.

Fire blocking being installed both vertical there are no sill plates anywhere and horizontally although each room runs joists different directions wall bays connect ceiling. In other words these cavities can act like the flue on a fireplace and actually promote the rate in which a fire could grow. Vertical basement wall fire blocking fire blocking basement walls is installed by nailing on strips of 5x8 or thicker o s b. Two layers of 1 by lumber.

Plywood covering any seams. In the habitat house we worked in baltimore city two weekends ago the project team installed additional fire blocking in the studs of the house by nailing a 2 4 half way up on the wall. 707 2 exc 6 shaft requirement may be eliminated for chimneys when fireblocked 708 4 fireblocking required in fire partitions when not continuous between deck and ceiling 803 4 ftnote a interior finish paneling over furring strips 804 4 1 subfloor construction 1406 2 4 combustible exterior wall veneers. Fire blocking in stud walls is required in wood framed buildings to stop drafts in the cavities between framing members.

In this video i will explain what fire blocking is and how it works. These requirements contained in ibc 2015 section 718 2 2 state that fire blocking is required vertically at the ceiling. If one should ever occur. These spaces can create drafts that will allow fire to spread readily if not dealt with.