Pemko 183ALT Elevator 183 - alternate position Elevators allow for custom sizing in offset conditions. Ratings Barrier-Free Fire Rated - UL10C - Positive Pressure Downloads Category Specification (.pdf) Pemko 183ALT Cut Sheet (.pdf) Pemko 183ALT Line Drawing (.pdf) Close Interested in this product? Contact us to order Related products Pemko 188_ Pemko 183_ Pemko 282_