Sanitary Plumbing Works: Fire Protection Works:       Domestic water system hot and cold Soil and waste plumbing system Storm drainage system Fire sprinkler system Wet and dry stand pipe Fire hydrant Design fire protection plan       Electrical & Auxiliary Works: Mechanical Works:       Electrical wirings Fire detection system Security system Trouble shoot and installation of telephone line Trouble shoot and installation of intercom Cabling and installation of pabx system Air-conditioning, Duct works and Ventilation System