Structural Flood Inspections 1 thru 10 of Residential and Commercial Structures in Response to Hurricane Harvey

February 27, 2018 Abdul Siraj, P.E.

Structural Flood Inspection Number: 1

Structural Flood Inspection Date: September 22, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Crosby, TX 77532

Total Miles Traveled for Structural Inspection: 107 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior wall were covered with wooden siding panels. The main roof was gable in configuration and covered with asphalt shingles. The homeowner’s main concerns were the vertical drywall cracks between the rear exterior wall and interior wall as well as general drywall cracking in the walls and ceiling throughout the house. 

 

Structural Flood Inspection Number:  2

Structural Flood Inspection Date: September 22, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Humble, TX 77338

Total Miles Traveled for Structural Inspection: 90 Miles

General Description of Structure and Property Owner’s Primary Concerns

The commercial structure was a one-story, steel-framed strip center supported on a slab on grade foundation. A short concrete retaining wall ran parallel to the rear elevation of the building. A concrete slab spanning the distance from the top of the wall to the rear elevation of the building sat on the retained fill behind the wall. The main roof consisted of a steel deck supported by steel bar joists. The property owner’s main concern was the condition of the retaining wall along the rear elevation of the building.

 

 

Structural Flood Inspection Number:  3

Structural Flood Inspection Date: September 22, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Spring, TX 77380

Total Miles Traveled for Structural Inspection: 109 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with brick veneer on all four elevation. The main roof was gable in configuration and covered with asphalt shingles. The homeowner’s main concern was that the exterior wall sheathing had been damaged by the reported flood event at certain locations of the residence.

 

 

Structural Flood Inspection Number:  4

Structural Flood Inspection Date: September 25, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Houston, TX 77044

Total Miles Traveled for Structural Inspection: 76 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with brick veneer on all four elevations. The main roof was hip in configuration and covered with asphalt shingles. The homeowner’s main concerns were the displaced brick veneer on the left elevation of the residence, the cracked brick veneer throughout the perimeter of the residence, and the cracked brick columns on the front elevation of the residence.

 

 

Structural Flood Inspection Number:  5

Structural Flood Inspection Date: September 25, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Houston, TX 77079

Total Miles Traveled for Structural Inspection: 38 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with brick veneer on all four elevations. The main roof was gable in configuration and covered with asphalt shingles. The property owner’s main concerns were the lateral displacement of the rear exterior wall due to the expansion of the wood floors, the cracks in the brick veneer, and the condition of exterior wall sheathing.

 

 

Structural Flood Inspection Number:  6

Structural Flood Inspection Date: September 25, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Houston, TX 77025

Total Miles Traveled for Structural Inspection: 43 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with wooden siding panels. The main roof was hip in configuration and covered with asphalt shingles. The property owner’s main concerns were the cracks in the slab on grade located at the interior of the house as well as cracks in the ceiling and upper wall finishes throughout the whole house.

 

 

Structural Flood Inspection Number:  7

Structural Flood Inspection Date: October 9, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Houston, TX 77025

Total Miles Traveled for Structural Inspection: 43 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with wooden siding panel on all four elevations. The main roof was gable in configuration and covered with asphalt shingles. The property owner’s main concerns were the cracks in the wall and ceiling finishes throughout the house as well as the cracks in the concrete slab on grade of the detached garage.

 

 

Structural Flood Inspection Number:  8

Structural Flood Inspection Date: October 9, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Friendswood, TX 77546

Total Miles Traveled for Structural Inspection: 78 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with brick veneer on all four elevations. The main roof was gable in configuration and covered with asphalt shingles. The property owner’s main concerns was that paper-faced exterior gypsum wall sheathing had been damaged throughout the house by the recent flood event.  

 

 

Structural Flood Inspection Number:  9

Structural Flood Inspection Date: October 9, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Pasadena, TX 77505

Total Miles Traveled for Structural Inspection: 78 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with brick veneer on all four elevations. The main roof was hip in configuration and covered with asphalt shingles. The property owner’s main concerns were the deterioration of the wall studs and exterior wall sheathing throughout the house as well as the cracks on the slab on grade.

 

 

Structural Flood Inspection Number:  10

Structural Flood Inspection Date: October 16, 2017

Reported Flood Event: Hurricane Harvery

City, State, and Zip Code of Flooded Propoerty: Beaumont, TX 77713

Total Miles Traveled for Structural Inspection: 234 Miles

General Description of Structure and Property Owner’s Primary Concerns

The residential structure was a one-story, wood framed house supported on a slab on grade foundation. The exterior walls were covered with brick veneer on all four elevations. The main roof was gable in configuration and covered with asphalt shingles. The property owner’s main concerns were the cracks in the brick veneer on the right elevation.

 

Structural Inspection Process

I, Abdul Siraj PE, was requested to conduct structural forensic engineering studies of the residential and commercial structures listed above. I physically inspected the properties on the dates referenced above in order to determine: extent of pre-existing damage, extent of damage caused by hydrostatic and/or hydrodynamic forces associated with the reported flood event, and the extent of damage caused by other sources.  My structural assessments consisted of the following tasks:

 

Conducted an interview with each property owner to establish a timeline of the damage and identify their structural concerns

 

Visually observed, documented, and photographed the portions of the structures which were affected by the reported flood event.

 

Studied the available weather information, weather conditions and other relevant data to understand the cause of the reported flood event.

 

Evaluated the information obtained from each structural inspection in order to identify: damage due to hydrostatic forces or buoyancy, damage due to hydrodynamic forces, damage due to impact of flood-borne debris, evidence of scour and/or erosion due to the velocity of the moving floodwater, and evidence of soil settlement either due to the recent exposure to floodwater or to long-term consolidation.

 

Prepared a structural forensic engineering report summarizing my observations, evaluations, conclusions, and recommendations for each property.

 

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