readhead
Well-known member
Even though the installation of several items is wrong in your building it isn't a problem since you have no snow load issues. For all the people that do have snow loads to consider nothing is to be attached to the bottom flange of the purlins. The only exception is small conduit and there are proper caddy clips to install that correctly.
Presuming that a collateral load is designed into the roof system all items should be attached to the side of the purlins. This failure is more common than you might think. I once had to repair a building where a video production company clamped light bars to the purlins for spotlights. The weight of the lights deformed the bottom flange which allowed the purlin to buckle and fail. There was about two feet of snow on the roof and in no time it was inside the building.
Simply get in the habit of attaching to the side of the purlin and everything should be okay.
Presuming that a collateral load is designed into the roof system all items should be attached to the side of the purlins. This failure is more common than you might think. I once had to repair a building where a video production company clamped light bars to the purlins for spotlights. The weight of the lights deformed the bottom flange which allowed the purlin to buckle and fail. There was about two feet of snow on the roof and in no time it was inside the building.
Simply get in the habit of attaching to the side of the purlin and everything should be okay.



















