Silo Roof Systems

All silos and bins 12' (3.66 m) through 42' (12.80) diameter are supplied with a single stage self-supporting roof. These silo roofs are designed for peak equipment load rating of 2000 pounds (907 Kg) and 16 psf (78 kg/sq. m.) live load

Silos and bins 48' (14.63 m) diameter and larger have a two-stage roof supported by "C" shaped, roll formed galvanized rafters and purlins. These silo roofs are rated for peak equipment load of 10,000 pounds (4,536 kg) and 25 psf (122 kg/sq. m.) live load. Larger peak equipment loads are available by request. A single stage self-supporting roof is also available for 48’ (14.63 m) diameter silos.

Roof panels are triangular sections of galvanized steel with brake-formed raised ribs along each side and 90º formed drip edge at the eave. The roof rib is a box-type rib with 3 ¼” (83 mm) rise. The silo roof panels are connected to the silo eave with rib clips and center clips. Holes in the silo roof and top ring wall sheets are factory-punched for clip installation.

Photo of silo and bin roof under construction

The silo and bin roofs of 39’ (11.89 m) and 42’ (12.80 m) diameter silos have a tubular support ring with expandable connectors attached to the exterior of the roof midway between the eave and the segment ring. The support ring provides added strength to the silo roof structure. These silo roofs are also equipped with 36 roof rib supports.

Center fill opening is 22” (560 mm) diameter for silos 12’ (3.66 m) to 24’ (7.30 m) diameter. Silos and bins 27’ (8.23 m) through 105’ (32.00 m) diameter have a 36” (900 mm) diameter fill opening. Optional 60” (1500 mm) opening is also available. All roof pitch is 30º.

Photo of silo roof assembly Each silo roof assembly 12’ (3.66 m) diameter and larger has one panel equipped with factory-installed hinged inspection hatch and a lockable latch. Roof inspection hatch is located at the eave next to the roof ladder. The manhole is trapezoid-shaped with dimensions 17” x 20” x 24” (430 mm x 508 mm X 610 mm).

Cleats manufactured from galvanized steel are provided for bolting to the roof around the perimeter of the peak cap. Tubular safety rings are available in lieu of safety cleats. Safety roof stairways with handrails are recommended.