Uninstalled 169' Stand Alone Stack. Manufactured by Warren Environmental. 169'0" Stack Height above grade. 60" Top Shell Diameter. 76" Bottom Shell Diameter. 304L Stainless Steel Shell Material. False bottom included with drain. One Access Door at Base. Ground System has Lugs at base per NFPA requirements. NBC of Canada 0.43 kPa (1/50 Probability) Windload. 3/16" Wall thickness. 200 deg. F. (max), 195 deg. F. (Operation) Design Temperature. Built in 2015. Base Stack Design according to ASME.