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 Post subject: Cut Back Brackets
PostPosted: Fri Mar 08, 2024 11:08 am 
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Why do councils cut back brackets before installing LED lanterns again?


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 Post subject: Re: Cut Back Brackets
PostPosted: Fri Mar 08, 2024 6:11 pm 
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The optics/beam patterns of LED lanterns are very different to that of SOX and SON. SOX columns tended to have longer brackets especially for 8/10m types to ensure sufficient spread of light across the carriageway. This is no longer needed for LED lanterns, and often when SOX was replaced with SON, brackets would also be cut back.

LED lanterns also tend to be quite heavy, reducing bracket length also reduces the bending stress on the bracket - which on older columns may not have its full design strength due to corrosion.


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 Post subject: Re: Cut Back Brackets
PostPosted: Sat Mar 09, 2024 6:34 pm 
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A contributing factor can also be that it can be easier to chop a lantern off a bracket than to try and release seized grub screws.

Chopping back of brackets was something that happened in some places before LED lanterns were being installed.


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 Post subject: Re: Cut Back Brackets
PostPosted: Mon Mar 11, 2024 9:53 am 
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I fail to see the benefit of doing this / fitting post top adaptors, except on older columns where brackets are either corroded or where an old lantern is difficult to remove.

I have seen an example where a whole road of (not very old) columns had their Arcs removed and Axias fitted with post top adaptors.  Then 2 years later they fitted brand new brackets (the same length as the ones they originally removed) on nearly every single column, as they realised that fitting post top lanterns in a tree-lined street, ruins light distribution…  :roll:


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 Post subject: Re: Cut Back Brackets
PostPosted: Mon Mar 18, 2024 1:59 pm 
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Now this is strange! The columns on this road have had their brackets removed when they installed the LED lanterns, however this one has had its bracket retained. The same occurred here! Why is this?


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