Thanks, hokie66. There's a variant that is being sold here in Europe for aluminum, clored aluminum and stainless steel, for as long as a bobine of sheet can deliver. It is made by a conforming machine that fits the sheet to preinstalled rails on which the sheets are conformed to classic sheating overlap. It has been used also for single and double curvature roofs. The appearance is usually with the protrusion of the covered rib to the exterior. Sorry I don't remember the trademark.
It's good that the architect is happy because their is no exposed joints in the roof sheeting of the gymnasium. Not that the military personal are going to be noticing the sheeting joints when they are on the bench press.
I'd say you are right, and maybe they will be making so much racket they won't notice all the noise coming from the roof sheets as they slide in the clips.
Sheets that long are usually roll-formed in the field from coil stock. Hokie...you're right...they move all over the place, but they don't have lap joints!
Had an issue a few years back in a church...every Sunday morning during the service, they would hear popping that started on one side of the roof and progressed to the other. Almost the same time each Sunday and loud enough to disrupt the service. Didn't take long to figure that one out.
a2mfk,
RE is correct. No diaphragm action. The roof plane would have trusses in the form of diagonal bracing to distribute the forces to the vertical bracing elements. Or portals in each direction.
Ron,
Rolling in the field is the way it's 'normally' done here as well. Seems space limitations and security concerns on site didn't allow that. Normal practice here with a concealed fastener roof is to provide expansion steps about every 20 metres or less in the roofing, with double purlins at those joints. This silly architect apparently thinks that double purlins are ugly, and the roofing supplier is encouraging this thinking.
RE,
Playing cricket with plumbers is dangerous, especially if they want to play on the roof.
