Scaffold accidents are a significant cause of construction injuries, and many of them involve plank failures. To perform safely, planks must be strong, stiff, and sound enough to carry the loads imposed by workers, tools, and materials. They must be supported adequately and installed correctly. MOST MASONS USE WOOD PLANK Masonry contractors most often use solid-sawn or manufactured wood plank. Solid-sawn lumber is most common. It generally is available rough sawn or dressed, which are differentiated by thickness and amount of surface treatment. Many masonry contractors prefer rough-sawn plank because its rougher surface improves traction. Manufactured wood plank includes laminated veneer lumber (LVL) and solid 2x2s glue-laminated side-by-side to widths of 9 1/2 inches or more. Manufactured wood plank offers a high degree of stiffness and strength. USE ONLY SCAFFOLD-GRADE PLANK OSHA Standard 1926.451 requires that all wood scaffold plank be certified as scaffold grade. Users must request proof that plank is scaffold grade to meet OSHA regulations and to assure maximum safety for their employees. MAINTAINING SCAFFOLD PLANK Treat scaffold plank as the important safety equipment it is. Jerry Adams, chairman of the Scaffold Industry Association's Plank Committee, says that contractors too often look at scaffold plank as a consumable commodity and don't expect it to last. "The smart thing to do is invest in good-quality plank, maintain it properly, and treat it as part of your equipment inventory. Then you can depreciate it over 2 years, use it for 10 years, and save money in the long run."