Dr. Dominique Derome 1 If a portion of the cavity is left empty to provide an air space (with a min. width of two inches), the wall works as a Rain screen: any water penetrating the external wall (through ever-present cracks or holes) will shed innocuously along the back of the external wall inside the air cavity and escape at the bottom through weep holes. Air space Basic Wall Types Masonry Cavity Walls: Rain Screen Effect

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3 Brick Veneer, Steel Stud Backup Designation of the Components (Contd.) 1)Brick Veneer 2)Flashing 3)Insulation 4)Sheathing + Air Barrier 5)Structure of the Building 6)Steel Studs 7)...

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5 Brick Veneer, Steel Stud Backup Components Description: Steel Studs The steel tracks are themselves attached to the top and bottom surfaces of the concrete slab using expansion bolts (1) driven in the concrete. Note that on the bottom side of the slab, a double telescoping track (2) is specified (see next slide). (2) (1)