Carpenters perform a variety of construction tasks including setting forms for concrete, erecting scaffolding, and installing interior and exterior trim. They cut, fit, and assemble wood and other materials to construct buildings, bridges, docks, and other structures. Carpenters first do layout by measuring, marking, and arranging materials according to blueprints or supervisor instructions. They then cut and shape materials using hand and power tools like chisels, planes, saws, drills, and sanders. The work often requires strenuous tasks like prolonged standing, climbing, bending, and kneeling and carries risks such as injury from sharp tools or falls.