In this Chapter—

“builder” means any person who undertakes or carries out building work, whether as owner or as contractor for such owner, and includes an excavator who is not a contractor;

“building-line” means a line established on private property to define the limits of the area on which buildings may be erected;

“building work” means any work, including excavation work in connexion with the erection, alteration, renovation, repair or demolition of a building;

“chimney”, without limiting the ordinary meaning of the word, includes a smoke-stack;

“covered walkway” means a walkway provided with a roof or deck to preserve the safety of the public using any street or public place;

“encroaching projection” means a projection which encroaches into, or over, any street or public place;

“excavation work” includes loosening, talking out and removing stone or soil or other material in connexion with the building work;

“excavation” means any person who undertakes excavation work;

“height of chimney” means the height of a chimney above the point at which it is connected to the building or another structure which it is supported, or, if it is not supported, the height above its foundation on or below the ground;

“walkway” means a boarded or built-up footway provided to enable pedestrians to pass the site of building work without having to walk in that part of the street used by vehicular traffic.