Swivels are used as an option on the bases to allow for the bases to lay flat on the roofs surface at whatever angle is required.
Typically used on slopes greater than ½” on 12”.
|Use with:||18”x18”, 12”x 12” and 18” round base|
|Note:||when swivel is used – bracing is required|
Not for individual sale, component part for support systems only.