Rafter Spacing For Polycarbonate Roofing

For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.

Rafter spacing for polycarbonate roofing.

If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. Ensure the purlin spacing is not greater than 1 500mm. 12 inch 3 type of roof framing rafter or manufactured truss. Drywall below 3 tile roofing.

Screws should be sealed in waterproof silicone sealant wiping off any surplus after driving the screws. Pre cut roof rafters to desired pitch and nail into position. Plaster below 2 tile roofing. As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.

Ridge board shall be not less than 1 inch 25 mm nominal thickness and not less in depth than the cut end of the rafter. Drywall below 3 lightweight roofing 4 tile. Both 16 inches and 24 inches are common measurements for rafter spacing. 2 measured rafter spacing center to center.

1 measured roof slope e g. 24 1 2 every 6 ft. The roofing company used the 15 foot 2 inch side to lay the sheets longways. Plaster below 2 lightweight roofing.

Adjust door construction to desired size. Overlap roof panels one corrugation away from prevailing wind and nail to rafters starting from one end. Solar array checks a. Pre drill holes and fasten side panels.

Subtract that number from the width of the panel and then divide by 2 to come up with the spacing for the rafters. I have a pergola measuring 16 4 by 15 2. 1 is the plane of the modules panels parallel to the plane of the roof. Rafters shall be framed not more than 1 1 2 inch 38 mm offset from each other to ridge board or directly opposite from each other with a gusset plate as a tie.

Use aluminum nails with neoprene washers and apply mastic to overlap of one corrugation. At valleys and hips there shall be a valley or hip rafter not less than 2 inch 51 mm nominal thickness and. Use these two tables for roof rafters with a slope of 3 in 12 or less. 24 1 2 every 7 ft.