Spans For Roof Deck

The number of supports beams or purlins affects the allowable span.

Spans for roof deck.

The strength of the shape provides impressive span and overhang capabilities making it ideally suited for long open interior and exterior spaces. Patio width is no less than 2 1m and length is no less than 3 5m. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. A redwood 4x6 beam should span no more than 6 between supporting posts.

Average roof height between 3m and 6 5m 3m h 6 5m. Obviously the larger the beam the greater the distance it can span between posts. Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts. For more information regarding canam steel deck please refer to the steel deck or contact our experts by phone at 1 866 466 8769 or online.

Maximum roof slope is 5 for monoslope and 22 5 for pitched roof. Patio height hc must always be less than roof height h. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.