If a roof is designed as “No Foot Traffic” the number of internal supports will be minimised. This will mean the roof of the structure is not designed to be walked on.

If you believe there will be a reason that the roof must be accessible by foot, it is suggested to select “Non-Trafficable”.

This will change the maximum roof sheet spans and force the addition of one or more purlins which cannot be removed, unless you revert to “No Foot Traffic”.