BS CP3:CH5-2(1972) : AMD 7908

Foreword
1. Scope
2. Definitions
3. Symbols
4. Outline of procedure for calculating wind loads
      on structures
5. Design wind speed
6. Dynamic pressure of the wind
7. Pressure coefficients and force coefficients
8. Force coefficients for unclad structures
Appendices
A. Ground roughness, building size and height above
      ground: the basis of the S2 factors
B. Explanatory notes on gusts and the wind-speed
      averaging time
C. A statistical factor S3
D. Topography factors
E. The estimation of internal pressure coefficients
F. Ice formation on structures
G. Wind forces on circular sections
H. Addresses of advisory offices
J. Published sources for analysis of dynamic
      structures
K. Necessary provisions for wind tunnel testing
L. Basic wind speed adjustment by direction
Tables
1. Table deleted
2. Table deleted
3. Ground roughness, building size and height above
      ground, factor S2
4. Values of q in SI units [N/(m squared)]
5. Values of q in metric technical units
      [kgf/(m squared)]
6. Values of q in imperial units [lbf/(ft squared)]
7. Pressure coefficients Cpe for the walls of
      rectangular clad buildings
8. Pressure coefficients Cpe for pitch roofs of
      rectangular clad buildings
9. Pressure coefficients Cpe for monopitch roofs of
      rectangular clad buildings with h/w < 2
10. Force coefficients Cf for rectangular clad
      buildings with flat roofs (acting in the direction
      of the wind)
11. Pressure coefficients Cpe for pitch roofs of multi-
      span buildings (all spans equal with h>w'
12. Pressure coefficients Cpe for saw-tooth roofs of
      multi-span buildings (all spans equal) with h not
      greater than w'
13. Pressure coefficents Cp for canopy roofs with
      1/4 < h/w < 1 and 1 < L/w < 3
14. Force coefficients Cf for clad buildings of uniform
      section (acting in the direction of the wind)
15. Pressure distribution around cylindrical structures
16. Values of reduction factor K for members of finite
      length and slenderness
17. Force coefficients Cfn and Cft for individual
      structural members (flat sides) of infinite length
18. Force coefficients Cf for individual structural
      members of circular section and infinite length
19. Force coefficients Cf for wires and cables
      (l/D > 100)
20. Effective force coefficients Cf for single frames
21. Shielding factor eta
22. Overall force coefficient Cf for towers composed
      of flat-sided members
23. Overall force coefficient Cf for square towers
      composed of rounded members
24. Overall force coefficient Cf for equilateral
      triangular towers composed of rounded members
25. Values of Le and S1
26. Directional factor S4
Figures
1. Basic wind speed
2. A statistical factor S3
3. Conversion chart for wind speed and dynamic pressure
4. Definition of topographical dimensions
5. Factor s for cliff and escarpment
6. Factor s for ridge and hill
7. Internal pressure coefficient (1)
8. Internal pressure coefficient (2)
9. Wake in subcritical flow
10. Wake in supercritical flow
11. Variation of force coefficient Cf with DVs for
      infinitely long circular cylinders having various
      degrees of surface roughness

Provides methods for calculating the maximum gust wind loads that should be taken into account when designing buildings or components thereof. Excludes buildings that are of unusual geometric shape, or have unusual site locations warranting special consideration. Does not apply to buildings whose structural properties make then susceptible to dynamic excitation.