architecture building building work construction construction work dust protection facade metal work pipes railing rails safety safety mesh scaffold scaffolding steel scaffolding white mesh blade brick-cutter bricks circular circular-saw cutting dampen danger Dirt dirty dust ear-protection electrical equipment machine noise Noisy pavers paving power powerful protected protection protective safety-equipment safety-gear water wet work working workman angles background colors colours drive firm fitting foundation foundational laying measuring path pathway perspectives quantity rough sand shapes shaping size Sizes solid strength strong surface surfaces textures toil tool tools