builder knocking down road setting out steel pins with lump hammer during roadworks. builder hammering steel bars down into the

america uk usa builder contractor working man beard male hammer lumphammer lump steel pin bar road nail roadworks construction site knocking hammering driving pushing setting installing installation kerb line curb level design transfer heavy hand vibration orange yellow hi helmet gloves point control marked cross predrilled hard strong safe safety measures measurement surveyor survey surveying engineering civil infrastructure live closure tired nonstop