FireNet Community
FIRE SERVICE AND GENERAL FIRE SAFETY TOPICS => Technical Advice => Topic started by: Demontim on May 06, 2015, 03:25:40 PM
-
The scenario: Circa 1970 single occupancy (non residential), 7 storey concrete structure comprising of four wings radiating from a central lift core (X shaped). Each wing has an enclosed protected escape at the end and an additional protected staircase opens into the central lobby.All the doors into the lobby have Georgian wire Porthole style vision panels and the occupiers want to freshen up the look of the area by increasing the amount of glazing within each door.
The guidance I've looked at from FRGGSA (Fire Resistant Glass and Glazed Systems Association) suggests that the area is unlimited providing it's above 0.1m and that there is no requirement for insulating properties and references BS 6262.
Does this mean a simple timber crossrail and stile construction with a single pane of FR glass with no insulation properties (providing it's manufactured and installed in accordance with relevant standards) is ok or am i missing something?
-
Assuming the relevant building is in England & Wales - there is guidance in Table A4 of the AD-B.
-
If I recall the old standard for doors (the one that pre-dated BS476-8, can't remember the number. There's a challenge for Tom Sutton!) provided for 1/4 inch plate glass up to 40 sq inches for porthole type doors.
-
Kurnal I think it is BS 459-3:1951 but it will cost you 152, however 76 in your case. ::)
-
459-3 was a spec for doors, whereas 476-8 is a test standard the forerunner of which was 476-1.