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Lightning protection to extension on existing building

gibb01

Hi all,

We're carrying out The electrical install to an extension onto a farm shop.The Existing building is single story, metal framed with a metal apex roof & existing PV on top. There is essentially a new wing being bolted onto it. We are also carrying out the design and I've had a lightning protection company come  to do an RA to see if and what level it should be installed. 

The risk assessment has come back as lightning protection being required. However, the client has done the usual thing and questioned why it's needed when the building has been standing for 15 years and never been struck by lightning etc etc.. So much so that they've said they're not willing to pay for it.

As we or designing the electrical installation for the new part of the building, I'm not sure where this leaves us from a legal standpoint. Other than getting the client to sign a disclaimer stating they're aware of the risks and are still happy to not have it installed. We can't force them to have it installed & It puts us in a difficult situation! 

Has anyone else come across anything like this? Any feedback would be very welcome!

Thanks,

Tim

Parents

  • Hi all, many thanks for replies. The lightning RA came back with a calculated risk to Human life (unprotected) of 1.36E-04 (Meaningless to me tbh) but we know it's recommended to be installed. We initially engaged with the lightning protection company to carry out a Risk assessment, as we are carrying out the design and install of the electrical installation. We believe we're carrying out our due diligence in this respect ( especially when dealing with a metal frame / roof building) 

    It is fairly low rise, peaking at around 4m at the apex.

    I appreciate all the advice, just interested to know what others have done if they have ever been in a similar situation.

    Thanks again

Reply

  • Hi all, many thanks for replies. The lightning RA came back with a calculated risk to Human life (unprotected) of 1.36E-04 (Meaningless to me tbh) but we know it's recommended to be installed. We initially engaged with the lightning protection company to carry out a Risk assessment, as we are carrying out the design and install of the electrical installation. We believe we're carrying out our due diligence in this respect ( especially when dealing with a metal frame / roof building) 

    It is fairly low rise, peaking at around 4m at the apex.

    I appreciate all the advice, just interested to know what others have done if they have ever been in a similar situation.

    Thanks again

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