a scaffolding structure set up at a construction site

scaffold scaffolding safety construction site sites set setup stage stagging temporary support supports supporting work crew material materials aid construct maintenance repair build building buildings column strut struts beam beams columns foundation foundations access heights high height area areas entry unsafe safe workplace project projects steel steels bar bars piece pieces mesh meshed fasten fastened fastener fasteners stack stacked stacking level levels multi multiple tier tiers elevate elevation ascend ascending descend descending gain worker workers manual labour labor hard tough