I design many oceanfront homes in hurricane areas. Architects often specify wood roof decks placed on sleepers over the flat roof areas (1/4"/ft pitch to drain). In the past the wood decking and sleepers would be installed like pallets so that they could be removed to allow for cleaning and roof repairs. The decking "pallets" are not attached to the roof surface which brings up the concern of uplift on the roof deck or "pallet". Screwing the pallets to the underlying roof stucture will lead to water problems or using an adhesive to the bottom of the sleeper will not allow for repair of the roofing surface. Anyone come up with a solution to this problem or is uplift not a concern? How would you determine the uplift force if any? It is my understanding that the roof uplift force determined from ASCE 7 for the building would act against the flat roof sheathing below and not on the decking above.
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