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F Masonry

F30 Accessories/ sundry items for brick/ block/ stone walling: 8, 17, 18, 48, 52, 54, 56, 58, 68, 132, 171, 180, 330, 345, 360, 370, 380, 385, 465
G Structural/Carcassing metal/timber

G20 Carpentry/ timber framing/ first fixing: 97, 900
H Cladding/Covering

H60 Plain roof tiling: 47, 66, 345, 355, 605

H61 Fibre cement slating: 47, 66, 345, 355, 605

H62 Natural slating: 47, 66, 345, 355, 605

H65 Single lap roof tiling: 47, 67, 345, 355, 605
J Waterproofing

J40 Flexible sheet tanking/ damp proofing: 35, 140, 370
K Linings/ Sheathing/ Dry partitioning

K10 Plasterboard dry linings/ partitions/ ceilings: 430

K40 Demountable suspended ceilings: 280
L Windows/ Doors/ Stairs

L20 Doors/ shutters/ hatches: 60, 630