4.1.7.9 — Full and Partial Wind Loading

(1) For the design of buildings with a height, H, that is less than or equal to 20 m and less than the smaller plan dimension, the values of the product of the pressure coefficient and gust factor, CpCg, provided in Sentences (2) to (9) are permitted to be used. (2) For the design of the main structural system of the building, which is affected by wind pressures on more than one surface, the values of CpCg are provided in Figure 4.1.7.6.A. (3) For the design of individual walls and wall cladding, the values of CpCg are provided in Figure 4.1.7.6.B. (4) For the design of roofs with a slope less than or equal to 7o, the values of CpCg are provided in Figure 4.1.7.6.C. (5) For the design of flat roofs with steps in elevation, the values of CpCg are provided in Figure 4.1.7.6.D. (6) For the design of gabled or hipped, single-ridge roofs with slope greater than 7o, the values of CpCg are provided in Figure 4.1.7.6.E. (7) For the design of gabled, multi-ridge roofs, the values of CpCg are provided in, (a) Figure 4.1.7.6.C. for roofs with slope less than or equal to 10o, and (b) Figure 4.1.7.6.F. for roofs with slope greater than 10o. (8) For monosloped roofs, the values of CpCg are provided in, (a) Figure 4.1.7.6.C. for roofs with a slope less than or equal to 3o, and (b) Figure 4.1.7.6.G. for roofs with a slope greater than 3o and less than or equal to 30o. (9) For sawtooth roofs, the values of CpCg are provided in, (a) Figure 4.1.7.6.C. for roofs with a slope less than or equal to 10o, and (b) Figure 4.1.7.6.H. for roofs with a slope greater than 10o.