TRUSSES

Review Truss Requirements With a Structural Engineer before you Build. These charts and load factor are for general information. Always check with your local building code requirements before construction.

COMMON --Truss configurations for the most widely designed roof shapes. MONO --Used where the roof is required to slope only in one direction. Also in pairs with their high ends abutting on extremely long spans with a support underneath the high end. SCISSORS --Provides a cathedral or vaulted ceiling. Most economical when the difference in slope between the top and bot- tom chords is at a minimum of 3/12 or the bottom chord pitch is half the top chord pitch. FLAT --The most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7% of the span in inches.

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