BS 6399-2 PDF

Purchase your copy of BS as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available. The use of BS part 2:wind loads, for design of temporary structures (English ) Wind loading: a practical guide to BS , wind loads on buildings. PROFESSIONAL. Welcome. IP51S0LUTIONS. Thank you and welcome to ‘ BS Wind Loading – Practical Design, an IStructE seminar presented by.

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This load case should be compared with the standard load case defined in Figure 40 and the more onerous condition should be used.

Other methods may be used in place of the two methods given in this standard, provided that they can be shown to be equivalent. NOTE Typical examples are relocatable or portable buildings, or mass-produced designs. Wind Engineering in the Eighties.

BS 6399-2:1997

NOTE 2 Wind tunnel tests are recommended when the form of the building is not covered by the data in this standard, when the form of the building can be changed in response to the test results in order to give an optimized design, or when loading data are required in more detail than is given in this standard. Pressures on the parapet walls should be determined using the procedure in 2.

General 1 Licensed copy: Summary of pages This document comprises a front cover, an inside front cover, pages i to vi, pages 1 to and a back cover. For pressure coefficients for skew-hipped roofs and other hipped roof forms see reference [6].

A simplified method of calculating the wind loads on unclad building frames which accounts properly for the shielding effects is given in reference [7], based on the full method given in reference [6]. Assesses the exposure of the site in terms of the pressure, pressure coefficients, dynamic augmentation factor terrain roughness and the effective height.


For duopitch roofs of greater disparity in pitch angles see reference [6]. Corrections were then made to the individual station estimates to ensure that when all the values were plotted on a map, they represented a height of 10 m above ground in open, level terrain at mean sea level.

The effective wind speed is a gust wind speed the map for the UK.

BS Loading for buildings. Part 2 Wind loads | José García –

Two alternative methods are given: Annex C informative Dynamic augmentation C. The standard method gives conservative level of dynamic excitation to determine: When the procedure of 2.

The reference height Hr is the height above ground of the top of the roof. Reading desks 6399-2 facilities Computer workstations Printing — photocopying — scanning Wireless LAN Interactive whiteboards Study cubicles Workstation for the blind and visually impaired.

BS – Loading for buildings. Code of practice for wind loads

However, for circular sections the pressure coefficients vary with wind speed and diameter. Conventionally, estimation of the extreme wind climate in temperate regions has involved the analysis of a series of annual maximum wind speeds, for example using the method proposed by Gumbel [8]. Enter the email address you signed 639-92 with and we’ll email you a reset link.

The crosswind breadth B and inwind depth D are defined in Figure 2. The frictional drag coefficient should be assumed to act over only zones F and P of such roofs, with values as bbs in Table 6. This gives further confidence that the year period of the original analysis was representative.

Zones of pressure coefficient are defined for each section from the upwind corner as given in Figure For duopitch canopies the centre of pressure should be taken to act at the centre of each slope. Before any reduction in wind speeds is considered specialist advice should be sought.

For circular elements whose diameter is greater than about mm the values in this section ns conservative. It is important, if directional effects need to be considered, to take full account of the effects of terrain upwind of the site in conjunction with the direction factor.


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The reference height for zone E should be taken as the top of the lower storey The greater negative pressure suction determined for zone E or for the zone A in item ashould be used. The strongest winds usually occur in mid-winter and the least windy period is between June and August.

Structure factors are used to check whether the response of the structure can be considered to be static, in which case the use of the calculation methods in this standard is appropriate. NOTE 2 For sites in towns less than 0.

For steeper roofs, the effects of parapets should be taken into account by using the procedure given in 3. Shelter of a site from a town upwind of the site has not been allowed for, other than if the site is in a town itself.

However, the hourly mean basic wind speed is subsequently converted into a gust wind speed for use in design by a gust peak factor which takes vs of gust duration bw, height of structure above ground and the size of the structure. This adjustment requires time to work up through the wind profile and at any site downwind of a change in terrain the wind speed is at some intermediate flow between that for the smooth terrain and that for the fully developed rough terrain.

Determines the dynamic augmentation factor from Stage 6: NOTE If there are fascias at the eaves or verges see 2. It is the constant aim of BSI to improve the quality of our products and services.