HDPE Ground nstruction mats 12mm thick for apron single-sided pattern Ground nstruction mats 1/2 Inch for parit okay Single Sided Access Mat – 2400mm x 1200mm x 12mm Key Features and Benefits. 2.4m x 1.2m x 12mm – Weight 34kg. Maximum Weight loading approx. 15-20 tonnes*. Unique diamond pattern “non-slip” surface for optimal grip.