Per the federal regulations contained in 49 CFR Part 26, Electronic Code of Federal regulations, a DBE is a for-profit small business concern that is: 1  At least 51 percent owned by one or more individuals who are both socially and economically disadvantaged.
To cut plywood to size, use a pair of sawhorses and 2 x 4s to create a stable cutting station. Installing Plywood Subfloor: Cutting Using a circular saw with the depth of the blade at 1/2 in (13 mm) deeper than the plywood sheet, cut the plywood to size.
Installing ceramic tile and porcelain tile over a plywood subfloor. 1  A plywood subfloor must be structurally sound and able to support the installation. 2  Tile floors are heavy and tile is a hard material. 3  It will break or dislodge if the surface bends under the load. 4  Remember that you need a very flat surface to work on.