Question: Design sag rods to support the purlins of an industrial building roof whose span and slope are shown in the accompanying figure. Sag rods

Design sag rods to support the purlins of an industrial building roof

Design sag rods to support the purlins of an industrial building roof whose span and slope are shown in the accompanying figure. Sag rods are placed at 1 points between roof trusses, which are spaced 30 ft apart. Assume roofing and purlin weight is 9 psf of roof surface. Use standard threaded rods and A36 steel. The snow load to be carried is 20, 30 or 40 psf of horizontal projection, whichever is appropriate for your locale. 28 48'-0

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