/ d say 7-8" deep RSJ is what you want and a crane to install it./q
A crane?! Meh he
Think of all those trendy fold away multiple French windows that fools want these days (for opening 10 days a year...) I can't see a crane being requi red or appropriate to install the equally long beams above them? beams that will have to take more load hence be even heavier than my rqmnts?
Nah several blokes & several milk crates....
Jim K