Beams are manufactured in a wide range of sizes and are precambered to Prolam’s specifications or available un-cambered to order. PL8, PL12 & PL17 Prolam Beams are treated to H3.2 and H1.2. Prolam Posts treated to H5 and H3.2. Beams and Posts are available in visual grades, where the wood surface is finished and aesthetically appealing, as well as non-visual grades.