Corrugated Roof Systems

Grain bin roofs have a 30° slope. Bins 45′ (13.72 m) diameter and smaller use single-stage selfsupporting roof sheets. Bins/silos 48′ (14.63 m) diameter and larger are designed with complete structural systems consisting of “C” shaped rafters and purlins (Raftered Roof).

Standard nonraftered roofs are designed for a 2 psf dead load and 20 psf live/ snow load. Roof designs and pricing for live/snow loads greater  than 20 psf are available as an upgrade. Standard raftered roofs are designed for 6 psf dead load and 25 psf live/snow load. Live/snow loads larger than 25 psf will require a special design. The table at the right includes the standard roof peak cap configurations, optional heavy-duty (HD) peak caps, and standard maximum peak loading capabilities.