The Duralite Aluminum Livestock Trailer is the most durable trailer built. Just ask the person that owns one. Our trailers are made of the best quality material available and dedicated workmanship for almost 35 yrs. The trailer is built of aluminum extrusions owned exclusively by Duralite. The extrusion alloy is 6061-T6 and was originally formulated for land transportation vehicles. The main characteristics of this alloy is to withstand flexing or movement of the metal, corrosion resistance and strength to weight ratio. Thus the extruded side planks, uprights and rails withstand the animal abuse that normally dents smooth sheet material. There are NO structural welds and the component parts are fastened together with locking bolts, locking aluminum rivets and huck bolt fasteners. This method of fastening does not change the metallurgy, reduce strength or distort parts as in the case of welding. So ask yourself, if welding is so strong, why don’t they weld airplanes?