Emphasis is now placed on longer tunnels which are divided into a number of lighting zones. Procedures specified can be adapted for short tunnels and underpasses.
BS 5489-7:1990 History
BS 5489-2:2016
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BS 5489-2:2003+A1:2008
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BS 5489-2:2003
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BS 5489-7:1990
$154.00 $309.00
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