CLASSES 000 - 099 : GENERAL
000 - 009 VACANT
010 - 019 TITLES AND FRAMES
020 - 029 GRIDS
030 - 039 DIMENSIONS
040 - 049 TEXT(XXX1 ENGLISH, XXX2 CHINESE)
050 - 059 GENERAL SYMBOLS
060 - 069 HATCHING
070 - 079 REVISIONING
080 - 089 TEMPORARY INFORMATION
090 - 099 VACANT
CLASSES 100 - 199 : GROUND, SUB - STRUCTURE
100 - 109 VACANT
110 - 119 GROUND
120 - 129 EARTHWORKS
130 - 139 FLOOR BEDS
140 - 149 TUNNELS
150 - 159 VACANT
160 - 169 RETAINING WALLS, FOUNDATIONS
170 - 179 PILE FOUNDATIONS
180 - 189 OTHER SUBSTRUCTURE ELEMENTS
190 - 199 PARTS & ACCESSORIES
CLASSES 200 - 299 : STRUCTURE PRIMARY ELEMENTS, CARCASS
200 - 209 VACANT
210 - 219 EXTERNAL WALLS
220 - 229 INTERNAL WALLS, PARTITIONS
230 - 239 FLOORS, GALLERIES
240 - 249 STAIRS AND RAMPS
250 - 259 VACANT
260 - 269 VACANT
270 - 279 ROOFS
280 - 289 BUILDING FRAMES, OTHER PRIM. ELEMENTS
290 - 299 PARTS & ACCESSORIES
CLASSES 300 - 399 : SECONDARY ELEMENTS, COMPLETION OF STRUCTURE
300 - 309 VACANT
310 - 319 SECONDARY ELEMENTS TO WALLS
320 - 329 SECONDARY ELEMENTS TO INTERNAL WALLS
330 - 339 SECONDARY ELEMENTS TO FLOORS
340 - 349 SECONDARY ELEMENTS TO STAIRS & RAMPS
350 - 359 SUSPENDED CEILINGS
360 - 369 VACANT
370 - 379 SECONDARY ELEMENTS TO ROOFS
380 - 389 OTHER SECONDARY ELEMENTS
390 - 399 PARTS & ACCESSORIES
CLASSES 400 - 499 : FINISHES TO STRUCTURE
400 - 409 VACANT
410 - 419 FINISHES TO EXTERNAL WALLS
420 - 429 FINISHES TO INTERNAL WALLS
430 - 439 FINISHES TO FLOORS
440 - 449 FINISHES TO STAIRS AND RAMPS
450 - 459 FINISHES TO CEILINGS
460 - 469 VACANT
470 - 479 FINISHES TO ROOFS
480 - 489 OTHER FINISHES TO STRUCTURE

490 - 499 PARTS & ACCESSORIES
CLASSES 500 - 599 : SERVICES, MAINLY PIPED, DUCTED
500 - 509 VACANT
510 - 519 WATER SUPPLY - EXTERNAL
520 - 529 WASTE DISPOSAL, DRAINAGE
530 - 539 LIQUIDS SUPPLY
540 - 549 GASES SUPPLY
550 - 559 SPACE COOLING
560 - 569 SPACE HEATING
570 - 579 AIR CONDITIONING, VENTILATION
580 - 589 FIRE PROTECTION IN GENERAL & FIRE SERVICES OTHER THAN ELECTRICAL
590 - 599 PARTS & ACCESSORIES
CLASSES 600 - 699 : SERVICES, MAINLY ELECTRICAL
600 - 609 VACANT
610 - 619 ELECTRICITY SUPPLY
620 - 629 POWER
630 - 639 LIGHTING
640 - 649 COMMUNICATIONS
650 - 659 VACANT
660 - 669 TRANSPORT
670 - 679 FIRE SERVICES ELECTRICAL
680 - 689 SECURITY, CONTROL, OTHER SERVICES
690 - 699 PARTS & ACCESSORIES
CLASSES 700 - 799 : FITTINGS, FURNITURE AND EQUIREMENT (FFE)
700 - 709 VACANT
710 - 719 CIRCULATION FFE
720 - 729 REST, WORK FFE
730 - 739 CULINARY FFE
740 - 749 SANITARY FFE
750 - 759 CLEANING FFE
760 - 769 STORAGE, SCREENING FFE
770 - 779 SPECIAL ACTIVITY FFE
780 - 789 OTHER FFE
790 - 799 PARTS & ACCESSORIES
CLASSES 800 - 899 : TRANSPORT INFRASTRUCTURE
800 - 809 GROUND SURVEY
810 - 819 HIGHWAYS
820 - 829 STREET FURNITURE
830 - 839 TRAFFIC AIDS & MARKINGS
840 - 849 RAILWAYS
850 - 859 BRIDGES
860 - 869 GROUND SURFACE - AIRFIELDS
870 - 879 VACANT
880 - 889 VACANT
890 - 899 TRANSPORT INFR. PARTS & ACCESSORIES
CLASSES 900 - 999 : EXTERNAL WORKS
900 - 909 SITE PREPARATION
910 - 919 BOUNDARIES & ENCLOSURES
920 - 929 SURFACE WATER DRAINAGE
930 - 939 SEWERAGE
940 - 949 DUCTING (EXTERNAL)
950 - 959 MARINE WORKS
960 - 969 MARINE FURNITURE
970 - 979 STRUCTURES IN EXTERNAL WORKS
980 - 989 LANDSCAPING
990 - 999 EXTERNAL WORKS PARTS & ACCESSORIES