G Structural/Carcassing metal/timber
G20 Carpentry/ timber framing/ first fixing: 10, 12, 15, 275, 310, 311

H Cladding/Covering
H20 Rigid sheet cladding: 150, 155
H21 Timber weatherboarding: 10, 15, 110, 111

K Linings/ Sheathing/ Dry partitioning
K11 Rigid sheet flooring/ sheathing/ decking/ sarking/ linings/ casings: 40, 115, 215, 315, 415, 515, 615, 715, 815
K13 Rigid sheet fine linings and panelling: 120, 160
K20 Timber board flooring/ sarking/ linings/ casings: 10, 20, 110, 150

M Surface finishes
M40 Stone/ concrete/ quarry/ ceramic tiling/ mosaic: 5, 10, 15, 110, 115, 120, 400
M50 Rubber/ plastics/ cork/ lino/ carpet tiling/ sheeting: 55, 560
M51 Edge fixed carpeting: 371

N Furniture/ Equipment
N10 General fixtures/ furnishings/ equipment: 10, 30, 110, 160

P Building fabric sundries
P20 Unframed isolated trims/ skirtings/ sundry items: 10, 40, 110, 240

Q Paving/Planting/Fencing/Site furniture
Q55 External decks, boardwalks and bridges: 380