twh gives me a good idea on this....
You can usually tell where the studs are easy on this type of material, since the metal sheeting is already screwed to it... the situation being that the studs are going to be in the low spots of the sheet metal design.... a small piece of strut mounted vertically in the low spots with the studs should yield a solid support system [Linked Image] a couple spring nuts wo mount the boxes (raintight w/ GFI, of course) 86 the MC cable, split elbow & anything else that belongs inside, a pull elbow, wp blank w/ 1/2 in KO, LB & threaded chase nipple... I think I remembered everything [Linked Image]

-Randy