Have a bonus room above garage. House built in 2006, room is 13 x 16 feet. Currently have 2 WPC, 1 Sys 11, 2 Stern, plus home gym at 450 - 500lb. Would like to guage if that would work to add 2 WPC and a GNR data east weight wise.....seems it would. There is also a main beam running side to side in the centre of the garage below. Opinions?