Timber Roof Beams Span Tables

Aitc beam capacity tables.

Timber roof beams span tables.

These tables are provided as a guideline. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3.

Span for the purpose of using these tables span may be interpreted as the clear distance between supports measured along the beam. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. Pitching beams 23.

Construction details should be in accordance with as1684 2. View allowable load tables. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Lintel size depth x breadth mm rafter or truss spacing mm seasoned hardwood f17 roof load width mm 1500 2100 4500 7500 5 10 20 5 10 20 5 10 20 5 10 20 maximum span of lintel mm sheet roof 90 x 35 1100.

View joist rafter tables. Aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties. Roof beams 20 verandah beams 22 garage roof. View size selection tables.

Other more complex load condition spans can be determined with our free hyne timber design 7 5 software. Lintels to internal wall openings supporting ceiling joists only may be sized as hanging beams. Single span beams are beams supported at two points only. Technical diagram on page 35 30mm m aximum allow able sp ans mm sheet roof spacing mm rafter size 600 760 900 1000 1200 66 x 30 850 750 700 700 600 90 x 30 1200 1050.

Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. Timber steel framing manual single span ridge beam. Designing with roof rafter span tables lvl 2 0e 2900fb power beam anthony forest s co raising ceiling joists jlc roofdek manual structural roof decking and trays. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Allowable load tables tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads. Member tables for seasoned timber. Continuous span beams are beams supported at three or more points along their length.