Collection of Perishable Data on Woodframe Residential Structures in the Wake of Hurricane Katrina

Case Study #7

Name Assigned: Porch collapse and veneer cracking

Address: Unknown

Coordinates: N30d26’39.9”/W089d05’20.8”

Structure Description: The house had an in-line two car garage with a central pier. The center pier, as well as the rest of the house, was finished with brick veneer. The pier was not attached to the foundation with an anchor bolt.

Failure Description: The pier between the two car garage was pushed in by the hurricane. This resulted in severe cracking of the brick veneer. Also, the front covered porch dormer that spanned about six feet had posts that were bearing directly on the concrete with no attachment to the concrete. The posts were lost during the storm, perhaps from the uplift of the porch, and the porch collapsed. Once the porch collapsed, the rest of the home was vulnerable to further wind pressurization, resulting in additional loss of sheathing as well as rain infiltration.

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