Trailer tongue, frame and cross members must be constructed of proper size and design to safely withstand the maximum stresses imposed by all phases of operation. A. Trailer must have a minimum GVWR of 18,400-pounds. B. Deck length: approximately 20-foot (16-foot tilt + 4-foot stationary) a. Stationary front deck approximately 4-foot. b. Rear tilt deck approximately 16-foot with a 10-15-degree loading angle. C. Overall trailer width must be a maximum of 102-inches, with minimum 81-inches between the fenders. D. Loaded deck height approximately 22-inches. E. Deck covering: apitong wood decking with a thickness of 2-inches on stationary and tilt deck. F. Frame: I beam construction. G. Self-actuating hydraulic cushion cylinder or cylinders. H. Hydraulic locking tilt. I. Tie Downs: D-Rings, minimum 5/8-inch a. Minimum (1) one each corner of stationary deck. b. Minimum (3) three per side on tilt J. A frame toolbox with lid.