Wind Loads beyond scope for multi-span frame with roof slope less than 5 degrees
Environment
British Standard
According to BS6399-2, rafters slopes less than 5 degrees should be treated a flat.
For a single standard span Tekla Portal Frame Designer will apply the adjacent, intermediate and remote coefficients assuming a single flat roof.
For multiple spans it will not. You need to calculate the coefficients & their lengths and apply them manually. As the scaling length is likely to be based on the eaves height, you could create a single span frame (does not need to be the full width of the building) and generate the wind loads cases to obtain this information. In the main model, the first frame will have adjacent and intermediate zones and all other spans will have the same single (remote) coefficient.
Alternatively increase your slope to 5 degrees.
For a single standard span Tekla Portal Frame Designer will apply the adjacent, intermediate and remote coefficients assuming a single flat roof.
For multiple spans it will not. You need to calculate the coefficients & their lengths and apply them manually. As the scaling length is likely to be based on the eaves height, you could create a single span frame (does not need to be the full width of the building) and generate the wind loads cases to obtain this information. In the main model, the first frame will have adjacent and intermediate zones and all other spans will have the same single (remote) coefficient.
Alternatively increase your slope to 5 degrees.