Characteristics of wind loads on roof cladding and fixings

Analysis of pressures measured on the roof of the full-scale Texas Tech building and a 1/50rnscale model of a typical house showed that the pressure fluctuations on cladding fastener and cladding-trussrnconnection tributary areas have similar characteristics. The probability density functions of pressurernfluctuations on these areas are negatively skewed from Gaussian, with pressure peak factors less than -5.5. Thernfluctuating pressure energy is mostly contained at full-scale frequencies of up to about 0.6 Hz. Pressurerncoefficients, Cp and local pressure factors, Kl given in the Australian wind load standard AS1170.2 arerngenerally satisfactory, except for some small cladding fastener tributary areas near the edges.