Y1CA - CONSTRUCTION OF SCHOOLS

Y1EZ - CONSTRUCTION OF OTHER INDUSTRIAL BUILDINGS

Y1GZ - CONSTRUCTION OF OTHER WAREHOUSE BUILDINGS

Y1QA - CONSTRUCTION OF RESTORATION OF REAL PROPERTY (PUBLIC OR PRIVATE)

Z1GZ - MAINTENANCE OF OTHER WAREHOUSE BUILDINGS

Z1QA - MAINTENANCE OF RESTORATION OF REAL PROPERTY (PUBLIC OR PRIVATE)

Z2QA - REPAIR OR ALTERATION OF RESTORATION OF REAL PROPERTY (PUBLIC OR PRIVATE)