Roof Framing Nomenclature

Stick truss roof framing.

Roof framing nomenclature.

Top plate or plates in conventional western platform framing there are two top plates. Overhangs hips and dormers add greatly to the complexity of the framing. Definition of structural ridge or ridge beam used in roof framing a structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself. Valley the inward angle of two sloping roof sections.

The inherent strength and integrity of the triangular form makes the roof a sound structure. Common types of roofs and basic framing terms. At the top of a wall panel you have a top plate and at the bottom you ll have a bottom plate. This is to help prevent deflection and sag in the roof.

Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. Sway bracing there are a few ways to sway brace the wall. Gable a gable roof has a ridge at the center and slopes in two directions. Nearly all roofs are framed using one of two methods.

Framing consists of a doubled valley rafter in the middle that extends from a top plate corner to a second ridge board with angled jack rafters for support. It is simple in design economical to construct. Standard stick framing or the newer truss framing. Collar tie also collar beam in profile the framing of a conventional pitched roof forms a triangle.

Roof framing can be simple or complex depending on the roof. It is the form most commonly used by the navy. Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist. On any wall panel or framing piece the beams that run horizontal at the very top and bottom of the frame are called plates.

The butt of a shingle is the end that faces down roof.