2×8 ft ground protection boards for swamp ground-HDPE Ground digger ground access mats 2’x8′ for swamp ground-HDPE road Ground Protection Mats Temporary nstruction Site Equipment They range in size from 6 to 8 feet long ways and 2 to 4 feet in width. Most are 1/2 inch thick. Depending upon their size, these weigh between 33 and 86 pounds.