Living in Florida requires an awareness of the potential hazards of a hurricane. Building owners and homeowners should be aware of the potential for damage to their structure. Damages from hurricanes can occur as a result of two separate mechanisms: water and wind. The type of structure and the materials used in construction can significantly affect the ability of a structure to withstand the forces of a hurricane.

Structures built along the coast, or in a V-zone, should be most concerned about the potential storm surge and wave impact. While most types of construction are susceptible to storm surge and wave impact, properly constructed reinforced masonry structures, reinforced concrete structures, bridges and seawalls have greater potential of weathering the storm. Slower moving flood waters are also prevalent during hurricane conditions, either as a result of inland storm surge or heavy precipitation. Flood waters are most damaging to fibrous materials, such as drywall, insulation, carpet and flooring. Often, structural components suffer little affect from slow-moving, short-term flood conditions.

Of greater importance to larger numbers of structures is the wind pressure, and accompanying wind-borne debris, created by the high speed winds of a hurricane. Aluminum screen enclosures, roof-top fixtures, and aged or deteriorated roof coverings are highly susceptible with regards to wind pressures. Aluminum screen enclosures, tile roofs, and unprotected openings are highly susceptible to wind-borne debris carried by high-speed winds. Protection of building openings (windows, doors, and overhead doors) is potentially the most important means to protect a structure. Breaches in the building envelope can result in internal pressurization of the structure, and ultimately the loss of the roof structure. Breaches can also lead to damage resulting from water intrusion from wind-driven rain.

Building Code revisions subsequent to Hurricane Andrew have incorporated construction practices focused on more hurricane-resistant construction. These revisions reflect the lessons learned during the aftermath of Hurricane Andrew. While this means newer construction is better suited to withstand the affects of hurricane conditions, vulnerabilities may still exist. It is recommended that a qualified engineer be retained to assess and address concerns specific to a structure. Government programs exist to aid homeowners in funding the assessment and installation of mitigation measures.

It is important to note that many insurance companies offer discounts on insurance rates for hurricane mitigation measures installed on older structures, when installed and certified by qualified personnel. It is recommended that you check with your insurance carrier for potential discounts.

Bracken Engineering can help you prepare for the coming Hurricane Season. Contact Tim Roda at troda@brackenengineering.com to find out how.

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