Limitations on the use of uninsulated glazing in enclosures and fire doors

Table 2.8 Limitations on the use of uninsulated glazing in enclosures and fire doors Position of glazed element | Permitted extent of glazing in parts of a building with access to – A single stair | More than one stair Walls | Door leaf | Walls | Door leaf A Purpose Group 1(b) and (c) 1 Within the enclosures of a protected stairway or within fire-resisting separation shown in Diagram 2.3 | Fixed fanlights only | Unlimited | Fixed fanlights only | Unlimited 2 Within the enclosures of an existing stair | Unlimited | Unlimited | Unlimited | Unlimited 3 Within fire-resisting separation described in paragraph 2.12(a) | Nil below 0.1 m² unlimited above 0.1 m | Nil below 0.1 m² unlimited above 0.1 m | Nil below 0.1 m² unlimited above 0.1 m | Nil below 0.1 m² unlimited above 0.1 m 4 Between an attached/integral garage and a dwellinghouse | Not applicable | Nil | Not applicable | Nil B All other purpose groups 5 Between residential/sleeping accommodation and a common escape route (corridor, lobby or stair) | Nil | Nil | Nil | Nil 6 Between a protected stairway and – (i) the accommodation; or (ii) a corridor which is not a protected corridor. Other than in item 5 above | Nil | 25% of door area | Nil below 1.1 m unlimited above 1.1 m | 50% of door area 7 Between – (i) a protected stairway and a protected lobby or protected corridor; or (ii) accommodation and a protected lobby. Other than in item 5 above | Nil below 1.1 m unlimited above 1.1 m | Nil below 0.1 m² unlimited above 0.1 m | Nil below 0.1 m² unlimited above 0.1 m | Nil below 0.1 m² unlimited above 0.1 m 8 Between the accommodation and a protected corridor forming a dead end. Other than in item 5 above | Nil below 1.1 m unlimited above 1.1 m | Nil below 0.1 m² unlimited above 0.1 m | Not applicable | Not applicable 9 Between accommodation and any other corridor; or subdividing corridors. Other than in item 5 above | Not applicable | Not applicable | Nil below 0.1 m² unlimited above 0.1 m | Nil below 0.1 m² unlimited above 0.1 m