Low-rise buildings - Wind Loading of Structures - page 209

Figure 8.12 Largest minimum pressure
coefficients, for houses with roofs of 20°
and 30° pitch (for any wind direction).
approach boundary-layer flow was representative of open country, and the wind direction
was varied at 10° intervals during the tests. The coefficients are all defined with respect
to the eaves height mean wind speed.
The highest magnitude coefficients occur on the roof. At the lowest pitch (10°), the
contours of highest negative pressures converge towards the corner of the roof; the effect
of increasing the roof pitch is to emphasize the gable end as the worst loaded region. The
worst local negative peak pressures occur on the 20° pitch roof in this area. The highest
magnitude minima on the walls occur near the corner.
Figure 8.13 Largest maximum and minimum
pressure coefficients, and for industrial
buildings with roofs of 5° pitch (for any wind
direction) (Davenport et al., 1977).