CASE 6: Vertical Acting with Egress
Elevator car doors are typically fire-rated but cannot comply with smoke and draft requirements. Smoke & draft rated assemblies eliminate the passage of smoke and are usually located at the point of access to an elevator car as an alternative to the elevator lobby.
Similar to the previous case study, the elevator car or elevator shaft door is fire rated but does not carry a UL 1784 smoke rating. But on this project the design team elected to use the FireFighter® D200E Fire Curtain which is listed and labeled as a 20-minute UL 10B, 3-hour ULD & UL 1784 assembly with a complying egress feature. By applying the 20-minute fire-rated assembly in this design, McKEON provided redundancy in the fire-rated requirements. Located at the point of access to the elevator car, this assembly protects the opening mitigating smoke migration as well as fire and heat penetration.