angles architectural architecture balance bricks brickwork building building-construction building-site building-work cabin cables colors colours construction construction-site construction-work crane danger elements exterior external foliage height high linear lines metal-work modern perspectives pipes protection railing rails roof roofs rooves safety scaffolding security sky steel-scaffolding steelwork tall trees walls work work-safe workmen buildings cement-mixers development equipment framework home home-units homes house light materials men mixers sand structure style suburban supplies units urban wall workers beams blue-collar-workers brick-work Bricklayer builders carpenters clothing concrete construction-workers dangerous dangers fabric footwear foreman form-work garment longyi lumber multi-storey multi-story roofer roofing standards timber tools tradesmen unprotected wood wood-work wooden workman building work construction work dust protection facade metal work safety mesh scaffold steel scaffolding white mesh framed frames metal straight views window-frames windows accommodation rubble untidy appearance constructed constructing cream dark second-storey second-story tiles tiling two-storey two-story construction worker heavy equipment job working