On PBS Alabama (Mobile) broadcast 1/12/13 it was stated not to use drywall screws to fasten an addit. flr tbr to an exist. beam because they are too brittle. Quest: can deck screws be used?
Second: a rule of thumb for calc. the ht. of flr joists was given [(span divided by 2) + 2]. Can that rule also be used for roof rafters. Esp. here on the coast w/ no snow load? Thanks.