The CRL Smoke Baffle Aluminum Base Shoe is designed to provide an almost invisible 1/2" (12 mm) tempered glass smoke curtain. Many of today's fire codes require large offices or retail areas to be broken down into smaller, more manageable areas that can be monitored by smoke detectors. This is the specific application for smoke baffles or curtains. Smoke curtains work to retain smoke in a specific area of a specified square footage. Some sprinkler systems are activated by a smoke alarm, so sectioning off areas using smoke curtains can prevent unnecessary sprinkler activation. The extruded aluminum Smoke Baffle Base Shoe simply attaches to the ceiling structure so the glass can hang straight down. The glass is secured with screws going through nylon grommets that fit into 3/4" (19 mm) holes drilled into the glass on 12" (305 mm) centers.