Interstory Drift

Interstory Drift has become a critical issue for structural engineers, with structural criteria now regularly applied to steel stair systems. We proactively lab tested our standard stair system. It exceeds Earthquake Story Drift requirement(s) of International Building Code (IBC) 2006 and ASCE edition 7-02 section 9.5.2.8.

Pacific Stair Corp. tested its stair system at the Oregon State University Earthquake Laboratory under the observation of KPFF Engineering. KPFF wrote the test procedure and monitored the testing to assure compliance with ASCE edition 7-02 section 9.5.2.8 and IBC section 1617.3 allowable story drift. Test results available upon request.