Roof Load Width Skillion

A butterfly roof has two skillions which angle down towards the centre.

Roof load width skillion.

For the 4 x8 lean to in the example in to determine rise the run is the width of the building or 4 feet. Skillion lean to roof framing calculator with running setout points inch all measurements are actual physical finished sizes. Wall length rafter thickness. This is the sixth video in the series on the timber framing code.

A roof slope of greater than 7 12 such as slopes between 8 12 to 12 12 is where the air dynamic issues start to arise requiring additional roof bracing to help mitigate the higher overall profile of the roof. Span calculator for wood joists and rafters also available for the android os. Roof load width rlw the other important consideration in determining timber lengths and sizes of your pergola is the size and weight of the roofing material the timber structure intends to hold up. Supporting load bearing walls and lintels in lower storey load bearing walls.

Determination of roof load width. Roof load width rlw and floor load width flw can be determined from as1684 or from the images below. Dead load psf span calculator for wood joists and rafters available for the iphone. Batten width top batten set in batten overhang.

These diagrams may also be used to determine roof load width for floor joists. Wall width rafter depth wall thick rafter spacing. Roof span is also of important consideration as the larger overall roof area will require more stringent roof bracing. Skillion lean to roof framing calculator with running setout points metric.

This design is a particularly effective way to trap water which is a big advantage for houses where collecting rainwater is a priority. Wall length rafter thickness wall width rafter depth wall thick rafter spacing wall height roof angle. This video looks at roof load width rlw.