Framing Eaves Of A Roof

And the line length measurement from the roof peak to the building wall is the hypotenuse.

Framing eaves of a roof.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. For gabled roofs the roof rafters extending beyond the wall caps creating an angled roof overhang on the eaves. The run or half the building span is the base of the triangle. The rise or height of the roof at its peak is the altitude of the triangle.

When designing an open eave with roof trusses make sure that you raise the heel of the truss and use a thicker top chord. A rake on the gable end of the roof can be created with the construction of additional roof framing. Open eaves with trusses. An eave is the part of a roof that overhangs the building s exterior walls.

The ceiling joists pushed the rafters up and gave extra height to the building. What hip roofs demand in extra framing. Doing so raises the eave which. Before roof trusses the exposed rafter tails were an extension of the roof framing.

If the lower section of the roof rafters or rafter tail extends beyond the exterior wall the projection forms an overhang or eave. A building with a hip roof has more eaves than a building with a gable roof. In wood frame construction the primary structural members of a gabled roof frame are the ridge board and the rafters.