Sturdy-Lite Cab Racks are engineered, manufactured and independently tested to the static load requirements of D.O.T. 393.114 paragraph(d). Each unit shows a load rating and appropriate static load rating (uniformly distributed.) You may contact Sturdy-Lite for a Load Rating/Static Result prior to purchase. Most units are load-rated at 52,500 lbs.(static requirement is 50% of load rating.) This product has limited ability to withstand impact. Sturdy-Lite makes no claim to impact resistance either implied or otherwise. Any load or force in excess of static load (D.O.T. requirement) may result in serious injury or death.