Variations on the skillion roof include circular or oval shaped designs and the butterfly roof.
Roof load width skillion.
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.
Wall length rafter thickness.
Wall length rafter thickness wall width rafter depth wall thick rafter spacing wall height roof angle.
Roof span is also of important consideration as the larger overall roof area will require more stringent roof bracing.
A butterfly roof has two skillions which angle down towards the centre.
Skillion lean to roof framing calculator with running setout points inch all measurements are actual physical finished sizes.
Supporting load bearing walls and lintels in lower storey load bearing walls.
Span calculator for wood joists and rafters also available for the android os.
Batten width top batten set in batten overhang.
Skillion lean to roof framing calculator with running setout points metric.
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.
This is the sixth video in the series on the timber framing code.
Determination of roof load width.
Roof load width rlw and floor load width flw can be determined from as1684 or from the images below.
Wall width rafter depth wall thick rafter spacing.
Rlw is used to calculate the sectional size of some roof members and supporting wall.
These diagrams may also be used to determine roof load width for floor joists.
This video looks at roof load width rlw.
This design is a particularly effective way to trap water which is a big advantage for houses where collecting rainwater is a priority.