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NBS Plus is a library of building product manufacturer information linked to NBS clauses and clause
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H Cladding/Covering
H11 Curtain walling: 110
L Windows/ Doors/ Stairs
L10 Windows/ Rooflights/ Screens/ Louvres: 25, 56, 330, 560
L20 Doors/ shutters/ hatches: 55, 60, 480, 520