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CHIMNEY INSPECTION DIAGNOSIS REPAIR
Abandoned Chimneys - Indoor Inspection
Abandoned Chimneys: Outdoors
Angled Chimney Flues
ARCHITECTURE & BUILDING COMPONENT ID
Attic Chimney Inspection
BACKDRAFTING HEATING EQUIPMENT
Blocked Chimney Flues
Bracket Chimney Collapse & Fire Risks
B-Vent Clearances Table
CARBON MONOXIDE - CO
CHIMNEY CAP & CROWN
CHIMNEY CHASE Construction & Defects
Chimney Cleaning Advice, Procedures
Chimney Cleaning Fraud Warning
CHIMNEY CLEANOUT DOORS
Chimney Components Definitions
CHIMNEY COLLAPSE Risks, Repairs
Articles on Collapsing Chimneys
BRACING for MASONRY CHIMNEYS
Bracing for Masonry Chimneys, Lateral
BRACING for METAL CHIMNEYS
Bracket Chimney Collapse & Fire Risks
Earthquake Chimney Collapse Dangers
Chimney Crack Detection & Diagnosis
Chimney Draft & Performance
CHIMNEY FIRE ACTION / PREVENTION
CHIMNEY FLASHING Mistakes & Leaks
CHIMNEY HEIGHT & CLEARANCE CODE
CHIMNEY HEIGHT EXTENSIONS
Chimney Inspection Checklist
CHIMNEY INSPECTION, FLUE INTERIOR CHIMNEY INSPECTION CAMERA
CHIMNEY INSPECTION INDOORS
CHIMNEY INSPECTION from GROUND CHIMNEY INSPECTION at ROOFTOP
CHIMNEY LEANING, SEPARATION, MOVEMENT
CHIMNEY REPAIR FRAUD WARNING
CHIMNEY REPAIR METHODS
CHIMNEY SAFETY - CPSC Alert
CHIMNEY SHOULDER LEAKS
CHIMNEY SHROUD, Decorative
CHIMNEY STAINS & LEAKS
CHIMNEY TYPES & MATERIALS
COMBUSTION AIR DEFECTS
COMBUSTION AIR for TIGHT buildings
COMBUSTION GASES & PARTICLE HAZARDS
COMBUSTION PRODUCTS & IAQ
COMPLETE COMBUSTION, Stoichiometric
CREOSOTE FIRE HAZARDS
Curved Brick Chimneys - Sulphation
Dead End Chimney Flue Hazards
DIRECT VENTS / SIDE WALL VENTS
DRAFT HOODS - gas fired
DRAFT MEASUREMENT, CHIMNEYS & FLUES
DRAFT REGULATORS, DAMPERS, BOOSTERS
EFFLORESCENCE, Salts & White / Brown Deposits
EMERGENCY RESPONSE, IAQ, GAS, MOLD
FIRE CLEARANCES INDOORS
FIRE CLEARANCES for MASONRY CHIMNEYS
FIRE CLEARANCES, METAL CHIMNEYS
FIRE CLEARANCES, SINGLE-WALL METAL FLUES
FIRE CLEARANCE WOOD & COAL STOVE FLUES
FIREPLACES & HEARTHS
FIRE STOPPING in BUILDINGS
FLAME COLOR, BLUE vs YELLOW COMBUSTION
FLASHING, CHIMNEY Mistakes & Leaks
FLUE SIZE SPECIFICATIONS
Flue Separation Requirements
Flue Tile Damage in Chimneys
FLUE VENT CONNECTORS, HEATING EQUIPMENT
FUEL CHANGES for HEATING APPLIANCES
HEATING COST FUEL & BTU Cost Table
HEATING SYSTEM INSPECTION
HOME HEATING SAFETY
INDOOR AIR EMERGENCY RESPONSE
Lennox SAFETY WARNING
METAL CHIMNEYS & FLUES
NOISE / SOUND DIAGNOSIS & CURE
ODORS & SMELLS DIAGNOSIS & CURE
ODORS FROM HEATING SYSTEMS
OIL HEAT SAFETY INSPECTIONS
PLASTIC HEATER VENTS
ROOF STAINS from CHIMNEYS
SAFETY RECALLS CHIMNEYS VENTS HEATERS
SHARED CHIMNEY & FLUE HAZARDS
STAIN DIAGNOSIS on BUILDING EXTERIORS
STAINS on/near CHIMNEYS
Three-Sided Chimneys: Problems
TRANSITE PIPE CHIMNEYS & FLUES
UNLINED FLUE INSPECTIONS
WOOD, COAL STOVES & FIREPLACES
WOOD STOVE SAFETY
This article describes chimney inspection procedures and provides examples of potentially fatal chimney collapse hazards in earthquake zones. We include description and photos of chimney collapses during earthquakes.
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In addition to the chimney movement and collapse hazards we discussed above, owners and inspectors in earthquake-prone areas need to consider the safety of their chimney and its ability to resist collapse during a temblor or earthquake.
Un reinforced chimneys often collapse during an earthquake. It's luck which way the collapsing chimney falls. In some cases the chimney falls into the structure, possibly killing the occupants below. In our photo (below left) the chimney happily fell away from the home and into the yard.
The photo of ten masonry chimneys all lined up in the street (above right) was taken by the author, D Friedman, in Northridge California after the Northridge Meadows earthquake in 1986.
The photos above show additional examples of earthquake damage to masonry chimneys. The chimney fell through the house at above left, luckily into the living room rather than a bedroom where people were sleeping, or it is possible that the occupants would have been crushed.
At above right an un reinforced stone chimney and stone house wall fell onto and crushed the automobile.
Other chimney collapse hazards can be frightening too, such as flues or chimneys collapsing trapping people working on them or simply someone who happened to be on a roof.
See Chimney Collapse Hazards & Chimney Support & Bracing Requirements. Also see our notes about Loose Wobbly Chimneys that need lateral support. A news report of a person who was trapped inside of a collapsing chimney is in our footnotes at Rooftop View Turns to Darkness.
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