A 4 ft wide and 12 ft long scaffold platform weighs 370 lb/ft. The platform is required to support 450 lb/ft of material for stone masonry work, as the weight of two workers. Assume the weight of 150 lb/ft for each worker. Total Load for the support?may use two different ways because of Osha below. Simple total load calculation? What number do you use for your scaffolding design, why? Osha support table (1926), is it light, medium or heavy-duty?