|NOTE: Before ordering a tower, identify the TIA/EIA revision the building department (see list) requires as well as any special design requirements. Although Revision G went into effect January 1, 2006, and Revision G was included in the 2007 IBC Supplement, some jurisdictions may require the design to meet Revision F until their code books are updated. However, if required, towers can be designed to meet both revisions. For additional information on Revision G, contact the following tower manufacturers and engineers:
ROHN Products, Sabre Communications, Valmont Communications or Weisman Consultants . Also, review our Tower Design Checklist to ensure that you can easily provide the necessary information to your tower manufacturer to ensure that it meets your specific requirements and not the default design.
County Wind Speeds (Select A State)
Minimum basic wind speeds (MPH) are presented so that the WirelessEstimator.com® user can identify the Revision F minimum wind speed requirement in each county in all states for estimating purposes only. Keep in mind that in each county there might be a special wind region or an increase in the basic wind speed to accommodate hurricane prone coastlines. Also, the owner may require an increased wind speed to further protect his structure. Wind speed is just one element used in designing a structure to be compliant to the national standard, TIA/EIA-222-F.
It is equally as important to identify the permitting jurisdiction. In example, although a national standard might suggest a 110 MPH basic wind speed with a minimum of ½” of solid radial ice, the county or city has the authority to increase the wind speed, add an importance factor, or modify the allowable stress. Just because the set of specifications you are bidding upon calls out a specific wind speed and standard for design, do not believe for a moment that the customer will be anxious to compensate you for any additional expenses if the specifications were wrong. Typically, there’s a catch-all phrase that places the burden upon you as the professional respondent.
We strongly suggest that you identify the jurisdictional building department and obtain the wind speed and design requirement prior to offering your proposal. If possible, have them e-mail or fax you the full design requirement. Some building officials are not as knowledgeable about our industry as you would like them to be and they may have erred in providing you with verbal information. Remember, although most tower manufacturers are well informed as to area wind speed and other requirements, the responsibility is still yours to verify the information’s accuracy. Revision G become effective January 1, 2006, but building officials may still require the structure to be designed under Revision F.
If you are a building official and your county requires a minimum basic wind speed that is different than the one presented, please let us know by contacting: firstname.lastname@example.org. Include your name, position and a telephone contact number. We will review your request and post the change.
NOTE: This generic, non-exhaustive overview is intended to serve as a useful starting point for research and analysis of the topics addressed. Proper training, professional knowledge and oftentimes licensing are required prior to anyone providing product design, selection, installation, and construction/development-related activities. This information is neither presented to instruct nor teach anyone in the proper or safe methods of any aspect of wireless design or construction. To ensure minimum exposure and to determine compliance for a safe working environment, you must obtain the advice and guidance of an industry professional.
WARNING: Failure to meet these minimum requirements and appropriate compliance responsibilities can result in serious injury or death to you or your fellow workers. All aspects of wireless construction are hazardous by nature. You have the sole responsibility to act safely and with caution prior to performing any construction-related task.