AtticTrac Plus 7100-1 Easy Access Storage System, White Easy to install, just a Phillips screw driver and a tape measure Engineered to 400 -Pound per section (truss system may limit to 160-Pound) Versatility in all areas, framed attics, truss attics, crawl spaces, under stairs Eliminates potential falls in the attic Tested for heat and moisture and made of the highest quality components