Seismic Clearance At Penetrations
No clearance; duct binds or damages barrier in an event
Red / Stop And Verify3rdBatch 4
What This Helps With
No clearance; duct binds or damages barrier in an event
Apprentice words: seismic clearance
Trade terms: seismic clearance, sleeve gap, movement joint
Check First
Required clearance and any listed detail at penetrations
What Not To Do
Eliminate movement clearance
What can go wrong: Grouting/caulking clearance solid where movement is needed
Better Foreman Question
Does this penetration need seismic movement clearance?
Verify With
Reference type: engineered detail
Source to verify: Seismic/firestop detail; engineer; AHJ
Safe wording: RED ZONE. Balance clearance vs firestop per details.