Roof Top Hvac Lighting Protection
Also harger feels it is imperative that the installation contractor follow the roofing manufacturer s requirements when it comes to attaching.
Roof top hvac lighting protection. For built up and modified bitumen membranes attach air terminal base plates with asphalt roof cement. Does this not serve to create an internal ground loop into the building. For single ply membranes attach air. A metal roof should never have copper lightning protection components installed on it unless the roof metal is copper says mark s.
Lightning protection of roof top equipment. The recommended protection diagram shows roof mounted air condition equipment to be bonded to the lightning protection system. Before getting on the job the roofer lps installer and general contractor should agree on project schedule and roof access as well as review proposed locations of lightning protection components. Metal roofs do not attract lightning strikes.
Penetrations especially should be located and marked prior to roofing so they can be found afterward. But one incident during hurricane ivan in september 2004 is particularly disturbing. Harger president ceo harger lightning grounding grayslake ill. Rooftop attachment of lightning protection systems in high wind regions may 2006 revised july 2006 page 2 of 3 attachment to built up modified bitumen and single ply membranes.
Nor do metal roofs protect a building against lightning. The building ground ties to the internal grounding network and thus to the air handling. Still the type of roofing is one of several risk factors. If there were any doubts about the dangers of poorly anchored rooftop equipment during a hurricane building consultant thomas lee smith can point to case after case of flying mechanical units rolling condensers and whipping lighting protection systems causing extensive damage to buildings.