Click on the drop down links below to read a frequently asked question:
The probability of a strike and whether protection should be fitted will be shown by carrying out a risk assessment. York Minster was around 600 years old when it was ‘eventually’ struck by lightning in 1984, causing extensive irreplaceable damage. Remember a direct strike to the structure is not even necessary for lightning to cause damage through fire, electric shock or electronic systems failure.
This is unlikely to give adequate protection in accordance with BS EN 62305 which calls for a full Faraday Cage, comprising a number of conductors on and around the building.
There’s no intuitive way of doing this – you need to carry out a risk assessment in accordance with BS EN 62305:2006 Part 2.
The risk assessment in BS EN 62305-2 is much more detailed and has many more parameters than the assessment contained in BS 6651.Furse has developed a bespoke risk assessment software package to simplify and speed the process, called StrikeRisk.
The risk assessment carries default values, which can be used where accurate information is not available. However, these values are conservative, so you should try and obtain as much accurate information as possible.
Yes. Furse can do site surveys for surge protection – they are free on mainland UK.
Unfortunately we can’t check an existing structural lightning protection system or do a survey for one. You would need to call a specialist lightning protection installer.
No, this will protect the structure itself but not the electronics within it. You therefore need specialist surge protection to prevent equipment damage from Lightning Electromagnetic Impulses (LEMP).
BS EN 62305 focuses on coordinated SPDs (Surge Protection Devices), where the locations and LEMP handling attributes of a series of SPDs are coordinated to nullify the conducted LEMP effects - thereby protecting equipment within their environment.