Certify my design

Need Your Design Certified in Australia?

We can quickly certify any type of building through our structural engineer.
Contact us below for a quote or call us directly on 0412 063 453.

Contact Us Now

Close

Settings

Help
Vdes(serv.) = 28m/s Vdes(ult.) = 50m/s
m

Save Cancel

DESIGN DETAILS

mm Help
The length of span 1 measured from the centre of its outer support to the centre of the central support
Maximise
mm Help
The length of span 2 measured from the centre of its outer support to the centre of the central support
Maximise
mm Maximise
mm
degrees
Help
Purlins near roof edges or changes of roof slope are subject to higher wind forces than interior purlins. As per AS1684 and AS4055 SpanMan adopts a nett pressure coefficient applied along the full length of the purlin of Cpn -2.0 for non cyclonic zones N1 to N6 and Cpn -2.5 for cyclonic zones C1 to C4. A consulting engineer familiar with the above codes should be contacted by the user should clarification be required with regards to the user's specific protect.
Note: Tick this box if the purlin is a distance "a" from a roof edge or a change in roof slope
"a" is the minimum of the building height, 0.2 of the building width or 0.2 of the building depth.
Modify manual load Help
Please select your roof compostion here. Note that SpanMan automatically calculates the weight of roof battens and adds it to the roof weight. For details of weights refer to ABOUT > Technical.
Additional dead loads can also be added in the CRITERIA screen.

Modify manual load Help
Please select your ceiling compostion here. For details of weights refer to ABOUT > Technical
Help
Pick 'List all suitable timber and steel sections' to design across all timber and steel sections. Alternatively design in a specific timber or steel material type. Press DESIGN to obtain sizes.
design Criteria