- Construction to install the ceiling, walls, partitions, etc. of a building by using metal structures
- Construction to install the safety, boundary, protection, soundproofing facilities, etc. on roads, bridges, tunnels, and other places by using metal structures
- Construction to build or install various metal building structures and improvements
(Construction of ceilings, dry walls, steel walls, lightweight partitions, etc./Construction of guardrails, guard cables, signs, protective fences, fences, rockfall prevention nets, rockfall prevention fences, soundproof walls, soundproof tunnels, bridge safety inspection facilities, bus platforms, road traffic safety facilities, etc./Construction of ladders, steel frames, railings, stairs, etc.)
- Construction to install windows, doors, etc. that are made of various metallic materials, synthetic resins, glass, etc. in buildings, etc.
(Window construction, balcony window construction, outer wall glass construction, curtain wall window construction, smoke ventilator, fire door installation construction, automatic door, revolving door installation construction, platform screen door installation construction, glass construction, etc.)
- Greenhouse installation construction
(Greenhouse installation construction for agriculture, forestry, horticultural, etc. and auxiliary equipment construction)