What is the maximum span for a 2×6 Rafter?

What is the maximum span for a 2×6 Rafter?

To measure the roof pitch, you'll need an 18- or 24-inch level, a tape measure, and a pencil. First, measure 12 inches from one end of the level and make a mark. Then, in the attic, place the end of the level against the bottom of a roof rafter and hold it perfectly level.

How do you layout roof rafters?

As a rule of thumb a birds mouth notch on a rafter should be no less than one third of the timber width and no more than half. So for example; on a 4×2" (100x50mm) the deepest point of the birds mouth notch where the plumb and seat cuts meet should be at least aprox.

How do you calculate Rafter cuts?

4/12 roof pitch angle = 18.43 degrees.

What is a Jack Rafter?

Definition of jack rafter. : a short rafter: a : one of the shorter rafters used in a hip or valley roof. b : a secondary roof timber (as a common rafter resting on purlins) also : one of the pieces simulating extended rafters under the eaves in some styles of building.

How long is a rafter?

EXAMPLE: Using the 7 Inch Rise table (and our 15' run), the common rafter length is 17' 43⁄8". This is the rafter length from the top cut to the seat plumb mark. tail or eave Length: The tail or eave overhang must be added to the rafter length.