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In Canada, factory-made wood trusses and rigid frames are most commonly connected by toothed press-plates of galvanized steel. This connecting method is fast and easily adapted to mass production methods, but it is not suitable for site-built structures assembled by small contractors or farmers. On-site truss building is more common in rural areas remote from pre fabricating plants. Here hand nailing has retained a place in farm building roof truss construction, so that the development of more efficient hand-nailing methods is justified. The Canada Plan Service (CPS) has distributed a full range of designs for handnailed wood trusses based on nailed connections developed by Turnbull and Theakston (1964). These connections used single, 38-mm thick frame members sandwiched between two 12.5-mm plywood gusset plates and nailed from both sides with special thick-shank hardened spiral
multi-laminated nailed truss connections
Turnbull, J. E., Lefkovitch, L. P. and D. Lowe 1981. MULTI-LAMINATED NAILED TRUSS CONNECTIONS. Canadian Agricultural Engineering 23(2):113-120.
113 - 120