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Wood Mezzanine Collapse Discount store mezzanine floor constructed with FRT floor joists collapsed. Undamaged joists were removed and full scale load tests were completed for strength evaluation to determine the cause of collapse and in order to prepare remedial recommendations to restore mezzanine Collapse Investigation of 400,000 sq. ft. Regional Distribution Center for National Retail Chain Investigation of 40,000 sq. ft. roof collapse under heavy snow load of 400,000 sq. ft. regional retail store distribution center. Roof was framed with steel trusses and steel joists. Parallel Chord Wood Roof Truss Collapse at Nursing Home Parallel chord metal plate connected wood trusses supporting roof top mechanical equipment collapse under heavy snow load. Investigation revealed plywood roof deck was inadequately nailed to truss top chords (nails missed chords). Top chords were in compression and buckled laterally. Buckled top chord splice plates failed. Investigation of Wood Plank Failure Accident Investigation of alleged wood plank failure accident in California. Review of accident history including inspection of plank and laboratory testing of plank. Glue Laminated 125 foot Span Tied Arch Roof Truss Failure Glulam trusses supported on steel columns for junior college gymnasium were subjected to unusual wind conditions resulting in failure of truss chord lumber at heel joint bolted connections. Floor Truss Bottom Chord Pullout Floor Trusses installed with hot water heat piping between truss top and bottom chords. Applied heat resulting in excessive cyclic shrinking of lumber and tooth withdrawn. |
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