Ebbe America Subfloor Lowering Kit The Ebbe Subfloor Lowering Kit quickly and easily lowers a subfloor between the joists for a barrier-free, curbless shower installation. This kit is perfect for I-joists because you install the bracket on top of the I-joist. Features Brackets need to be spaced at a maximum of 36″ to achieve L/360 with a live load of 40PSF and a dead load of 20PSF 2x4 lumber will sit on the brackets, and a 3/4" plywood subfloor will be built upon that frame Kit will lower your floor up to 24 SF It avoids joist penetrations and the need for web stiffeners Wall brackets can be adapted to be used at joists Use of subfloor adhesive at hanger seats is recommended If the subfloor is thick, trim the 2x4 so the subfloor is flush with the joist Recommended structural grade 2 or better Douglas fir, larch, or pine 2x4 lumber 2x4 and subfloor material not included What's Included? 15 Joist Brackets 6 Wall Brackets 36x 1-1/2"Joist Hanger Nails 75x 1-5/8" Wood Screws