For works affecting larger scale features; for example, doors, windows, railings and staircases, drawings at 1:10 and 1:20.
Ar gyfer gwaith sy'n effeithio ar nodweddion mwy o faint; er enghraifft, drysau, ffenestri, rheiliau a grisiau, lluniadau ar raddfa 1:10 ac 1:20.