Often one of the last items to be installed in the building, architectural metalwork can be a challenge to draft. Floors not level, walls not quite where they are meant to be, will it be too heavy and will it fit through the opening are some of the things that need to be considered.
Examples of architectural metalwork drafting completed by Brimum Mechanical Draughting.
Belfry access ladder

Installation drawing for a belfry access ladder
Corten steel architectural feature

Corten steel architectural feature that doubles as a rain water down pipe
Glass balustrade

Glass balustrade patch fittings exploded view assembly drawing
Rainwater gutters

Isometric of a stainless steel roof gutter