ASTM E84 and UL723 Steiner Tunnel Test
The Steiner tunnel is widely used for testing interior wall and ceiling finishes for their ability to support and propagate fire and their tendency to emit smoke. The test was developed in 1944 by Al Steiner of Underwriters Laboratories and incorporated as a reference into North American standards for materials testing per ASTM E84, NFPA 255, UL 723, and CAN/ULC-S102. These standards are used to regulate and select materials for interior building construction throughout North America.