"""""This area limitations the prevalent follow of utilizing a brief metal nipple to penetrate a rated assembly, firestopping for your steel penetration (that is significantly less expensive than firestopping for plastic) and after that connecting to plastic pipe or conduit about the area side from the wall. flooring/ceiling or roof/ceiling https://lanefsenv.wssblogs.com/35224133/a-review-of-aluminium-plat