Spool of construction string line placed in red blocks. Tool to help worker for set straight distances on new edifice Stock Photo - Alamy

Red line block hi-res stock photography and images - Page 8 - Alamy

Plastic bobbin hi-res stock photography and images - Page 14 - Alamy

Civil structure construction hi-res stock photography and images - Page 50 - Alamy

Metal spool hi-res stock photography and images - Page 13 - Alamy

Plastic building blocks on background hi-res stock photography and images - Page 18 - Alamy

Construction roll up hi-res stock photography and images - Page 11 - Alamy

Plastic spool hi-res stock photography and images - Page 18 - Alamy

Construction roll up hi-res stock photography and images - Page 11 - Alamy

Block edging hi-res stock photography and images - Page 2 - Alamy

Plastic building blocks on background hi-res stock photography and images - Page 18 - Alamy