... Instructions Page 1 4 x 8 Utility Trailer Construction Instructions This trailer is designed specifically as a heavy-duty, utility trailer with a low profile bed and options ... the trailer, the more space it takes. Page 13 4’x8’ Utility Trailer JoeBlack_us Construction Instructions ... under the trailer on the 5’ wide models. With the 4x8 trailer, the ramp can be used, but must be stored some other place. The catch plate hooks are designed to grab the back channel of the trailer...