Steel reinforcement work

Processing, connecting, and assembly of steel bars and other steel materials

Scaffold/construction work

Scaffold work; construction of footings and other auxiliary structures;

assembly of steel frames; mounting of concrete blocks; and disassembly/demolition work
Pile work, pile driving, pile pulling, and in-place-casting

Carpentry

Carpentry, mold work and finish carpentry

Concrete work

Concrete work, concrete driving work, concrete compression work, and prestressed concrete work

Landslide prevention, foundation improvement, boring grout, earth retaining, temporary coffering, spraying, riprap, external construction, and chipping work

Block work

Constructions with bricks or concrete blocks or work to apply or attach bricks, concrete blocks, or tiles to structures

Plasterwork

Plasterwork, mortar work, concrete waterproofing, spray work, grinding work, and washing out