The map represents 3-sec gust wind speeds with annual probability of exceedance of 0.02 (or 50-year return period). The objective of this paper is to provide the basic wind speed which will be used to design building structures in Nairobi. Wind Zone I equates to a 70-mph fastest-mile wind speed. Fundamental basic wind velocity map and effect of altitude to consider in United Kingdom per wind zone Altitude effect according to NA to BS EN 1991-1-4 (01 2011) (from NA.2.4 Equation NA.1) where: v b,map is the value of the fundamental basic wind velocity before the altitude correction is applied. STEP 1: Determine your Basic Wind Speed. The basic wind speed values ranged from 16 m/s to 31 m/s. The design charts for basic wind speeds currently in use in Brazil [1] were created in 1977, based on wind speed records from 1950 to 1974. Basic wind speed: Basic wind speed in U.S. is shown in Figure 6.1. The basic wind velocity is given as v b = v b,0 ⋅c dir ⋅c season where the fundamental value of basic wind velocity v b,0 is defined in EN1991-1-4 §4.2(1)P and its value is provided in the National Annex. I am a design engineer completing work from the USA for Qatar. Basic Wind Speed Map: for reference only. by a single wind map giving basic maximum wind speed in m/s (peak gust speed averaged over a short time interval of about 3 seconds duration). tures, return period, wind speed map. The wind speeds were worked out for 50 years return period based on the up-to-date wind data of 43 dines pressure tube (DPT) anemograph stations and study of other related works … Risk Category I. ASCE 7-10 uses wind maps with recurrence intervals of 700, 1700, and 300 years (for Risk Categories II, III-IV, and I The basic wind speed in miles per hour, for the development of wind loads, shall be determined from Figure1 1609 A, B, and C. The exact location of wind speed lines shall be established by local ordinance using recognized physical landmarks such as roads, canals, rivers and lake shores whenever possible. The basic wind speed is basic on statistical data collected from airport across U.S. * Data from nearest weather station: Cotonou, Benin (112 KM). The database covered up to 25 years of wind records obtained in 49 Lesson: Basic Wind Loads ASCE 7-10 Page 3 of 21 Note that in the previous version of this map (the 2007 version), the wind speed in Miami was 145 mph, not 170! The information reflects the ASCE maps electronically to speed up critical design … Buildings and other structures that represent a low hazard to human life in the event … These values are converted into equivalent values of mean wind speed, W m (mean wind value averaged over a 1-minute period), by applying suitable conversion factors to … Altitude correction may also be specified in the National Annex for EN1991-1-4 §4.2(2)P. The directional and season factors … Online service to determine the basic value of the basic wind speed and the basic wind velocity pressure with display of the wind zones in the Netherlands according to NEN EN 1991-1-4. Europe - European Current Wind Speed including, Spain, Portugal, England, Ireland, Scotland, Italy, France, Germany, Austria, … The basic wind speed for the Laddakh region, which has high hills and valleys all through it, is 55 meters per second. The whole of the Philippines is divided into three major wind zones namely: high wind zone, mid-wind zone, and low-wind zone. 2009 AASHTO LTS-5 specification 3-second gust basic wind speeds (mph) with gust effect factor (G) of 1.14 and 25 year design life wind map (ASCE 7-05) is shown above. An International Building Code version which refers to ASCE 7-10 is now being adopted in Colorado. On average, the most wind is seen in July. For the African continent, a wind atlas is available for Egypt, South Africa and Algeria. Always consult the local authority that has jurisdiction over the special wind region in order to determine the correct design wind speed. Get wind speed map by zip code or postal code. The values of basic wind speed (that is, peak gust velocity averaged over an interval of 3 sec) have been specified for the six wind zones of India. The manufactured home producer designs the home to resist the wind load, which is measured in pounds per square foot. Does anyone know where I can get excerpts from the QCS 2010 in regards to wind velocity and other structural code criteria? , users can still enter their sites ’ zip code or postal code to 31 m/s at Risø Laboratory. Specific location that represent a low hazard to human life in the …! Ft above ground for exposure c category valleys all through it, is meters. 100-Mph fastest-mile wind speed objective of this paper is to provide the basic wind speed definition WAsP, 2006.. 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