The load effect required for strength design shall be determined for the same mean recurrence interval as for the analytical method by using a rational analysis method, defined in the recognized literature, for combining the directional wind tunnel data with the directional meteorological data or probabilistic models based thereon. Response characteristics of the wind tunnel instrumentation are consistent with the required measurements.Reynolds number effects on pressures and forces are minimized.The longitudinal pressure gradient in the wind tunnel test section is accounted for.The projected area of the modeled building or other structure and surroundings is less than 8% of the test section cross-sectional area unless correction is made for blockage.The modeled building or other structure and surrounding structures and topography are geometrically similar to their full-scale counterparts, except that for low-rise buildings meeting the requirements of tests shall be permitted for the modeled building in a single exposure site as defined in.The relevant macro - (integral) length and micro -length scales of the longitudinal component of atmospheric turbulence are modeled to approximately the same scale as that used to model the building or structure.The natural atmospheric boundary layer has been modeled to account for the variation of wind speed with height.Tests for the determination of mean and fluctuating forces and pressures shall meet all of the following conditions: Wind tunnel tests, or similar tests employing fluids other than air, used for the determination of design wind loads for any building or other structure, shall be conducted in accordance with this section. Commentary is developed in accordance with the format and sections of ASCE 7-05. Pressures determined from Chapter 30 should be adjusted for the allowable stress design load factor of.

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Current language in ASCE 7-10: For typical door and window systems supported on three or more sides, the effective wind area is.

Simplified Language for Effective Wind Area (Chapter 26 Commentary). Chapter 30 Wind Loads-Components and Cladding (C&C) pp.

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