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Roof. <br />For Load Case A, Clear Wind Flow <br />(NW 1.2 (from 0 to 0.5L from windward edge)Fig. 6-18A <br />NL =0.3 (from 0.5L to L from windward edge) <br />PNW =6.0 psf (from 0 to 0.5L from windward edge) <br />PNL =1.5 psf (from 0.5Lto L from windward edge) <br />For Load Case A, Obstructed Wind Flow <br />(NW =-0.5 (from 0 to 0.5L from windward edge)Fig. 6-18A <br />CNIL -1.2 (from 0.5L to L from windward edge) <br />PNW --2.5 psf (from 0 to 0.5L from windward edge) <br />PNL =-6.0 psf (from 0.5L to L from windward edge) <br />For Load Case B, Clear Wind Flow <br />(NW =-1.1 (from 0 to 0.5L from windward edge)Fig. 6-18A <br />(NL =-0.1 (from 0.5L to L from windward edge) <br />PNW =-5.5 psf (from 0 to 0.5L from windward edge) <br />PNL =-0.5 psf (from 0.5L to L from windward edge) <br />For Load Case B, Obstructed Wind Flow <br />(NW =-1.1 - ---(from 0 to 0.5L from windward edge)Fig. 6-18A <br />CNL ='-0.6 (from 0.5[ to L from windward edge) <br />PNW =-5.5 psf (from 0 to 0.5L from windward edge) <br />PNL --3.0 psf (from 0.5L to L from windward edge) <br />For towers... <br />F = q,GQAf <br />qz =5.9 psf <br />G=0.85 <br />A.1 = 12 in/12 ft2 perfoot of height <br />E=0.3 (Approximate solid to gross area ratio) <br />Q.4E2-5.9E + ·2.59 <br />F'=12:9 pif along tower trusses <br />-1,1 <br />4