MemberJuly 11, 2005 at 10:28 pm
Pop rivets are as good and probably better than the self drill tap screws. They have a larger area of contact with the cladding. Its fine using long screws if the sign lines up with the internal steel, Rareley does though.
Just edited to point out that andy’s link is for fixing to timber, so would be no good on a steel frame building.
This is the link for the metal screws But on cladding, rivets are going to do a better job, if you cannot line up to the internal framework.