Builder adjustable steel trestles are manufactured from Tubular Electronically Rotation Welded Steel and are wide enough to take four standard scaffold boards or lightweight stagings, to create a safe working platform for bricklayers, plasterers and painters. Adjustable height: 1.07m to 1.75m. Conforms to BS1139 Part 4: 1982. High quality powder coated for long lasting corrosion protection. Safe working load: 650Kg.