THE ROOF TYPE YOU HAVE IS CALLED A TRUSS FRAME ROOF AND SHOULD NOT BE USED TO STORE ANY WEIGHT AS THE W SHAPE DESIGN AS YOU STATE IS PRE LOADED AND ANY DOWN FORCE ON A LATERAL STRING EG CEILING JOIST CAN DISTORT THE ROOF. SMALL AMOUNTS OF WEIGHT CAN BE DISPERSED OVER THE STUD WALLS BUT MAKE SURE...
