(Answered): What does the “horizontal distance from the windward edge”means? Roof Pressure Coefficients, Cp, ...

Roof Pressure Coefficients, Cp, for use with qhn Windward Angle, 0 (degrees) 20 Leeward Wind Angle, 0 (degrees Direction h/L 10 15 25 30 35 45 10 15 260 220 Normal 0.0 -0.7 -0.18 -0.5 0.0* -0.3 -0.2 0.3 -0.2 -0.3 -0.5 -0.6 0.2 0.3 0.4 0.4 0.010 S0.25 to 0.0 -0.3 -0.2 0.2 0.3 Ridge for e 2 -0.9 -0.18 -0.7 -0.4 -0.6 -0.5 -0.5 0.010 0.4 0.0* 0.2 -0.5 0.0 0.2 -0.18 0.5 -0.2 0.0* 0.3 -0.3 0.2 -1.3** -0.18 -1.0 -0.7 100 -0.6 -0.6 -0.7 0.010 0.2 -0.18 -0.18 Horizontal distance from windward edge O to h/2 h/2 to h h to 2 h >2h 210 Normal Cp *Value is provided for interpolation purposes to -0.9, -0.18 -0.9, -0.18 -0.5,-0.18 -0.3, -0.18 Ridge for 0 10° and Parallel to ridge for all **Value can be reduced linearly with area over which it is applicable as follows $0.5 Reduction Factor 1.0 Area (m2) 9.3 m 23.2 m 92.9 m -1.3*,-0.18 0 to h/2 0.9 21.0 0,8 0.7,-0.18 > h/2