Gable Roof Size

Rafter plumb cut depth.

Gable roof size.

Check that your footage measurements are within this range so you can start off on the right foot. Another option are 2 x 8 rafters spaced 24 inches o c. There are several variables to consider when determining the proper rafter size. Measure out horizontally 12 one foot from the gable end sloping trim to a point along horizontal siding or use your level to make a mark that is level horizontally measured out 12 from the sloped gable trim or roof edge.

Outside of the u s a degree angle is typically used. In making your choice consider how you will insulate your insulate your roof. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. If you have a roof section that s 30 feet 9 1 m long and 12 feet 3 7 m high multiplying those dimensions would give you an area of 180 square feet 17 m 2.

Length from ridge to eave. The table states that 2 x 6 rafters spaced 16 inches on center o c can span a maximum distance of 13 feet 5 inches. Use the saltbox roof to calculate a two sided roof with different slopes spans and or overhangs for each side of the roof. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.

In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Measure and mark the square footage of each triangular section carefully as these tend to differ in size. Total rafter lumber length. Gable roof a gable roof has two opposite sides with equal slopes and equal spans that meet in the center of the roof at the ridge.

Total roof width with rake overhangs. Gable roof framing calculator plan diagram with full dimensions for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. 10 add up the areas of each section to get your total square footage.