Exterior Walls in Mass Timber Buildings

Part 1 of series introducing construction types that allow extensive use of mass timber, covering material allowances, fire-resistance rating requirements (FRRs), and common exterior wall materials. Addresses 2021 IBC construction types (III, IV, V) including new tall timber types (IV-A, IV-B, IV-C), material requirements for each construction type, fire-resistance rating requirements based on occupancy and fire separation distance, and project examples. References companion Parts 2 and 3 covering floor-to-wall details and cladding systems.