Building Code Wind Speed Maps

Step 1: Determine the "Risk Category" for your project using the following information.

Step 2: Click on the "Map" for the selected "Risk Category". Follow the prompts to "Install Microsoft Silverlight"

Step 3: Enter the address in the "Find Places" box in the upper right corner. NOTE: You must include the street number, street name, and city.

Wind Speed Risk Category 1

Buildings and other structures that represent a low hazard to human life in the event of failure, including but not limited to:

Buildings and other structures except listed in Risk Categories I, III and IV

Buildings and other structures that represent a substantial hazard to human life in the event of failure, including but not limited to:

Buildings and other structures whose primary occupancy is public assembly with an occupant load greater than 300.
Buildings and other structures containing elementary school, secondary school or day care facilities with an occupant load greater than 250.
Building and other structures containing adult education facilities, such as colleges and universities, with an occupant load greater than 500.
Group I-2 occupancies with an occupant load of 50 or more resident patients but not having surgery or emergency treatment facilities.
Group I-3 occupancies.
Any other occupancy with an occupant load greater than 5,000*
Power-generating stations, water treatment facilities for potable water, waster water treatment facilities and other public utility facilities not included in Risk Category IV.
Buildings and other structures not included in Risk Category IV containing sufficient quantities of toxic or explosive substances to be dangerous to the public if released.

Buildings and other structures designated as essential facilities, including but not limited to:

Group I-2 occupancies having surgery or emergency treatment facilities.
Fire, rescue, ambulance and police stations and emergency vehicle garages.
Designated earthquake, hurricane or other emergency shelters.
Designated emergency preparedness, communications and operations centers and other facilities required for emergency response.
Power-generating stations and other public utility facilities required as emergency backup facilities for Risk Category IV structures.
Structures containing highly toxic materials as defined by Section 307 where the quantity of the material exceeds the maximum allowable quantities of Table 307.1(2)
Aviation control towers, air traffic control centers and emergency aircraft hangars.
Buildings and other structures having critical national defense functions.
Water storage facilities and pump structures required to maintain water pressure for fire suppression.