Slide 4 of 15
Notes:
- Inspecting a Chimney
- Cracks in the chimney flue liner allow hot gases to leak into the wall or roof framing and start a fire.
- A thorough inspection of the chimney after any significant earthquake will be necessary to identify any hidden or less obvious cracks.
- Video camera inspections and smoke tests may be required.
- What can you do with “unreinforced” brick chimneys?
- One basic method for dealing with unreinforced brick chimneys:
- REPLACE THE CHIMNEY!
- Replacing a Chimney
- Bracing of chimneys has been ineffective in preventing their failure during earthquakes.
- Replacing a chimney is a costly solution, but it is the most effective technique to prevent damage
- In some cities, such as Los Angeles, full or partial replacements may be the only accepted method.
- Check with local building department for details & information.
- The figure shows a chimney replaced with a lightweight, stud framed alternative
- Partial replacement methods
- Remove all brick above the firebox.
- Replace chimney with a reinforced masonry chimney
- Replace with metal stud framed chimney with a metal flue
- This less-expensive method removes most of the potential problem.
