Coffee Break Training: Building Construction: Metal Plate Connected Truss Inspections [open pdf - 527KB]
"Firefighters and inspectors pay particular attention to modern lightweight construction. During a recent townhouse remodeling project, this metal plate connected floor truss was discovered to have lost the connection between the plate and lumber. These metal nailing plates sometimes are known as 'gusset plates.' Trusses are designed using sophisticated software that accurately calculates the structural load conditions in accordance with building code requirements. During construction is the best time to see how a truss roof system is configured and distributes loads."
Coffee Break Training - Fire Protection Series No. FP-2014-11
United States Fire Administration: http://www.usfa.fema.gov/