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NYC Building Code

§ 1609.3 — § 1609.3

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What is NYC BC § 1609.3?

Quick Answer

This section establishes the basic design wind speed for buildings, specified in miles per hour based on risk categories and exposure conditions. The values provided are intended for use in structural design to ensure safety against wind forces. Applies to building owners involved in construction and design compliance.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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1609.3 Basic design wind speed.

BC § 1609.3

The basic design wind speed, V, in mph, for determining wind speed shall be that of Table 1609.3. Table 1609.3Basic Design Wind Speed Risk CategoryBasic Design Wind Speed, mph(3-sec gust, 33 ft. for Exposure Category C)Mean Recurrence Interval, yearsProbability of Exceedance in50 years, %I11030015II1177007III1271,7003IV1323,0001.6 Note: Values are ultimate design 3-second gust wind speeds in miles per hour at 33 feet (10 058 mm) above ground for Exposure Category C.

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