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Author Topic: Old categories from BS5839 1980 & 1988  (Read 3211 times)

Offline AnthonyB

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Old categories from BS5839 1980 & 1988
« on: November 19, 2008, 02:05:17 PM »
Not having these old standards could someone tell me:

How often on an L3 system did you need to place a head on a stair - every other landing or just at the very top? Was it similar to the current version of much less?
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Anthony Buck
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Graeme

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Re: Old categories from BS5839 1980 & 1988
« Reply #1 on: November 19, 2008, 05:25:07 PM »
Top of stairway and on landings so the vertical distance between detectors did not exceed 10.5m
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