compass roof[¦käm·pəs ¦rüf]
A roof in which each truss is in the form of an arch.
A convex-shaped roof formed either by curved rafters or by a combination of beams arranged in a vault.See also: Roof
1.A roof having curved rafters or ties.
2. A form of timber roof in which the rafters, collar beams, and braces of each truss combine to form an arch.