Abstract: A triangular frame assembly is disclosed for supporting a safety barrier of boards above the edge of a roof during construction. The triangular assembly employs pivotal connections between a base and a lower stanchion member, between the base and a diagonal brace, and between the diagonal brace and an upper stanchion member telescopically connected to the lower stanchion member. The angle between the stanchion and the base can be adjusted to accommodate a wide range of roof pitches by varying the telescopic engagement of the upper and lower stanchion members. The range of roof pitch angles for which the frame assembly can be used is increased by making the upper stanchion member invertable, adapting both ends thereof to alternatively telescopically engage the lower stanchion member, and by providing for an off-center brace connection to the upper stanchion member.