Importance of Structural Assessments after an Earthquake
After the recent earthquake in Idaho, we thought it would be important to remind our friends and clients of the importance of structural assessments after an earthquake. Assessments are necessary as building codes and designs are based on life safety during an earthquake, and there is no guarantee that the structure will be functional afterward. In addition, insurance companies can require an assessment for any claims. By performing the assessment as soon as possible and documenting the damage, it limits the uncertainty associated with determining the causation of particular damage.
There are usually two types of evaluations that are conducted during a structural assessment. The first is a visual inspection, which should be performed within 24 hours after an event. The visual inspection is important to protect the life safety of the individuals prior to re-entry in the building. A visual assessment will start on the exterior of the structure with the engineer looking for shifts and damage to the structural members. Once inside, the engineer will look for damaged columns, shear walls, and other structural elements. This is also an opportunity for the engineer to document minor damage such as cracks for an insurance claim. Please note that a structural engineer will not address systems such as plumbing or mechanical systems.
Detailed Structural Evaluation
The second type of evaluation included in the assessment is a detailed structural evaluation. This will usually take place several days after an event and typically entails a day or two to perform depending on the size and type of building. This assessment is important as visual inspections cannot reveal the full extent of the earthquake-caused damage. This assessment might include nondestructive testing such as tactile testing or crack monitors. This will allow the engineer to find concealed damage, and test members for adverse settlement or deflection that can indicate weakened connection members. These weakened connections can be covered by drywall or other materials. Destructive testing or removal of coverings to expose these structural elements may be required. The visual inspection helps the engineer determine the level and extent of testing and type of evaluation needed during the detailed structural evaluation. To help with this detailed inspection it is recommended that you have any structural drawings or information on the building available and organized. This will help the engineer speed up the inspection process,
If you need an assessment after an earthquake, please feel free to contact us and we will be glad to help you out.
Other HECO Engineering White Papers
- How to Inspect A Roof After a Storm
- When is a Crack Just a Crack?
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