Large, ground-mounted guide signs are supported with a steel I-beam support system that breaks away when hit by a vehicle. High wind gusts sometimes blow the sign over, with failure at the “hinge.” See the for hinge details.

The tension fuse plate can be ordered from the regional distribution centers. The fuse plate is listed as: “PLATE, FUSE, galvanized.” Fuse plates are ordered by size to fit the post, and all bolts, nuts, and washers must be ordered separately.