Roof Sheeting Span Tables

Avoid roof complaints with proper framing sheathing and roofing techniques.

Roof sheeting span tables.

This video may depict some work practices that do not meet current safety standards. Flat roof span tables allow for a maximum roof pitch of 5º. Load span tables for apa structural use panels number q225g february 2011 load span tables for specific structural use panel applications are included in several apa publications. Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier.

Capacity tables are in limit state format. Sheeting material shall be protected steel sheet to australian standard as1397 with a minimum yield stress of 550mpa grade g550 and an am100 az150 coating with or without an oven baked paint. Recom mended loads for sheathing and flooring applications in these publications directly reflect minimum performance. Always ensure your work site is compliant with current osha regulations.

Roof spans consider both resistance to wind pressure and light roof traffic traffic arising from incidental maintenance. Span tables have been developed by determining wind pressures in accordance with as4055 2006 for domestic applications and as nzs 1170 2 2002 for all other applications. Produced by apa the engineered wood association formerly the american plywood association in 1989. Reading off the empty under table with h 5m hc 2 5m span table c will be used to determine the spans.

Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. Span table the maximum recommended support spacings are based on testing in accordance with as1562 1 1992 as4040 1 1992 and as4040 2 1992. Posts these span tables are designed for a minimum post size of 50 x 50 x 2 5mm up to a maximum height of 3 0m. Step 4 assume the wind classification for the area is n1 and the roofing profile is stramit corrugated cladding 0 48mm bmt thickness in a single span configuration.

The wind capacity tables are based on testing in accordance with as1562 1 1992 and as4040 0 1 2 1992. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Table b relationship between span rating and nominal thickness for osb a nominal thickness b in span rating 3 8 7 16 15 32 1 2 19 32 5 8 23 32 3 4 7 8 1 1 1 8 sheathing span 24 0 0 375 0 437 0 469 0 500 24 16 0 437 0 469 0 500 32 16. Osb roof design example calculations using asd 4x8 foot.

The roofing walling shall be 0 42 or 0 48 mm bmt stramit corrugated roof and wall cladding in continuous lengths with sinusoidal ribs 16mm high spaced at 76 2mm centres in accordance with as1445.