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Diagrams <br /> ®1 ® J Q OL ®_ L©e <br /> I I I 1 <br /> I I I 1 <br /> I I I I <br /> I I I I A <br /> I I I I <br /> ©I O :(B©1 O IQ h <br /> I I I I <br /> I I I I <br /> I I I I I B <br /> I I 1 I r <br /> y I I I I ELEVATION <br /> PLAN <br /> cd Notation <br /> o a= 10%of least horizontal dimension or 0.4h,whichever is smaller,but not less than either 4%of least horizontal <br /> dimension or 3 ft(0.9 m).If an overhang exists,the edge distance shall be measured from the outside edge of the <br /> overhang.The horizontal dimensions used to compute the edge distance shall not include any overhang distances. <br /> B=Horizontal dimension of building measured normal to wind direction,in ft(m). <br /> ¢ h=Mean roof height,in ft(m). <br /> w9=Angle of plane of roof from horizontal,in degrees. <br /> ui <br /> External Pressure Coefficients <br /> -4.0 W 4s <br /> isI -38 <br /> -3.6 -Roof- -36 <br /> U -3.4 2 •3.4 <br /> -3.2 _U •32 <br /> 40 40 <br /> •2.8 -2.8 U <br /> o .16 i� •2.6 �6 <br /> o V -2.4 •2A <br /> o -1.200 LN -d -22 - <br /> - 100 <br /> 2.0 •2.0 ai <br /> °' 'o -L8 - •1.8 2-0 •11i <br /> o d -L6 0©0 -1.6 46 <br /> p U -1.4 U -1.4 - - <br /> 2 -12 <br /> a N -10 •lA -1.0 <br /> .03�- -0.6 -0.8 0 6 <br /> -0.4 -0.4 <br /> aEa 42 W •02 <br /> r +0.02 " +00 <br /> U <br /> +0.4 405 {0.4 <br /> +0.6 - 40.6 <br /> M Zones <br /> + 1 a 20 50 100 200 5001000 9 +1.01 10 20 50 too 200 5001000 <br /> (00 (09) (L9) (46)(93)(16) (465)(929) (00 (09) (19) (46)(93)(66) (465)(929) <br /> Effective Wind Area,ft 2(m2) Effective Wind Area,ft 2(m2) <br /> Q Notes <br /> 1.Vertical scale denotes(GCp) to be used with qh. <br /> 2.Horizontal scale denotes effective wind area,in ft2(m2). <br /> 3.Plus and minus signs signify pressures acting toward and away from the surfaces,respectively. <br /> 4.Each component shall be designed for maximum positive and negative pressures. <br /> 5.Values of(GCp)for roof overhangs include pressure contributions from both upper and lower surfaces. <br /> 6.If overhangs exist,the lesser horizontal dimension of the building shall not include any overhang dimension,but the <br /> edge distance,a,shall be measured from the outside edge of the overhang. <br /> FIGURE 30.3-2D Components and Cladding [h<60 ft(h< 18.3 m)]: External Pressure Coefficients, (GCp), for Enclosed and Partially <br /> Enclosed Buildings-Gable Roofs, 27°<9<45' <br /> Minimum Design Loads and Associated Criteria for Buildings and Other Structures 339 <br />