These sign configurations exhibited an average reduction of 16% in mean force coefficients, with a range of 9% to 22% compared to single-faced sign force coefficients given by the preceding equation. These tests also showed that the eccentricity of 0.2 times the width of the structure is overly conservative. Eccentricities reported in the study ranged from 0.039 to 0.105 times the width of the structure, with an average of 0.061. Testing by Giannoulis et al. (2012) and Meyer et al. (2017) supports the findings in Mehta et al. (2012).

The 0.85 term in the denominator modifies the wind tunnel-derived force coefficients into a format where the gust-effect factor, as defined in Section 26.11, can be used.