Transcription of Truss Design Example - Jim Richardson
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Truss Design Example - Jim Richardson
CE 331, Fall 2000 Truss Design Example 1 / 8 Design a typical steel Truss girder to support the roof of the office building shown below. Fy = 36 ksi Purlins are Z 7 x light gage steel, weighing lb/ft Use WT sections for the chords, double angles (LL) for the verticals, and single angels (L) for the diagonals. Roof: Composition 4-ply felt & gravel 18 ga metal deck fiberglass insulation gravel and bitumen waterproofing membrane Ceiling: acoustic tile suspended steel channel 6 @ 10 ft = 60 ft 2 @ 10 ft = 20 ft 20 ft 20 ft 15 ft 6 @ 10 ft = 60 ft 2 @ 10 ft = 20 ft 20 ft Plan View Front Elevation CE 331, Fall 2000 Truss Design Example 2 / 8 Calculate Dead Loads Composition 4-ply felt and gravel psf 18 ga metal deck psf Fiberglass insulation psf Gravel Bitumin Waterproofing psf Acoustic Tile psf Suspended Steel Channel psf Total psf PDL_int = psf x 10 ft x 20 ft + lb/ft x 20 ft = k PDL_ext = psf x 5 ft x 20 ft + lb/ft x 20 ft = k Find chord with the max.
CE 331, Fall 2000 Truss Design Example 1 / 8 Design a typical steel truss girder to support the roof of the office building shown below. Fy = 36 ksi Purlins are Z 7 x …
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