Bowstring Truss Failures, Part 1: Deficiencies & Failure Causes

DonanEngineering Commercial & Residential Roofing, Forensic Engineering, Structural Damage & Collapse

Introduction Wood bowstring trusses were used extensively in commercial buildings from the 1920s to the 1960s. Wood bowstring roof trusses provided long clear spans necessary in warehouse and industrial buildings. Many roofs supported by bowstring trusses are still in service today. Compared with other structural timber-truss types, bowstring trusses have exhibited more frequent structural problems. The structural deficiencies encountered are …