Laserfiche WebLink
L2/ <br /> Diagrams <br /> 144_04 -.7)li <br /> I iiirliOggilso <br /> gil <br /> 01 :ago o .�000! „MI I <br /> 0 <br /> Case A `O 4. <br /> v ./ � % <br /> © 'ter-3,. .\ <br /> I.�/C- <br /> 141.00 Case B <br /> Notation <br /> a 10%of least horizontal dimension or 0.4 h,whichever is smaller,but not less than either 4%of least horizontal dimension or 3 ft <br /> (0.9 m). <br /> EXCEPTION: For buildings with 0=0 to 7°and a least horizontal dimension greater than 300 ft(90 m),dimension a shall be <br /> limited to a maximum of 0.8 h. <br /> h Mean roof height, in ft (m),except that eave height shall be used for roof angles< 10°. <br /> 0 Angle of plane of roof from horizontal, in degrees. <br /> Notes <br /> 1. Pressures shown are applied to the horizontal and vertical projections,for Exposure B,at h=30 ft(h=9.1 m).Adjust to other <br /> exposures and heights with adjustment factor A. <br /> 2. The load patterns shown shall be applied to each corner of the building in turn as the reference corner(See Fig. 28.3-1). <br /> 3. For Case B, use 0=0°. <br /> 4. Load cases 1 and 2 must be checked for 25°<0<45°.Load case 2 at 25°is provided only for interpolation between 25°and 30°. <br /> 5. Plus and minus signs signify pressures acting toward and away from the projected surfaces, respectively. <br /> 6. For roof slopes other than those shown, linear interpolation is permitted. <br /> 7. The total horizontal load shall not be less than that determined by assuming p3=0 in Zones B and D. <br /> 8. Where Zone E or G falls on a roof overhang on the windward side of the building, use EoH and Goa for the pressure on the <br /> horizontal projection of the overhang. Overhangs on the leeward and side edges shall have the basic zone pressure applied. <br /> 9. Unit conversions for tables: <br /> Adjustment Factor for Building Height and Exposure, A <br /> Exposure <br /> • <br /> Mean root height(ft) B C 0 ( <br /> 15 1.00 1.21 1.47 • <br /> 20 1.00 1.29 1.55 1 <br /> 25 1.00 1.35 1.61 <br /> 30 1.00 1.40 1.66 <br /> 35 1.05 1.45 1.70 <br /> 40 1.09 1.49 1.74 <br /> 45 1.12 1.53 1.78 <br /> 50 1.16 1.56 1.81 <br /> 55 1.19 1.59 1.84 <br /> 60 1.22 1.62 1.87 <br /> Note:Unit conversions for tables: 1.0 h=0.3048 m; 1.0 lb/ft2=0.0479 kN/m2; I mph=1.6 km/h <br /> FIGURE 28.5-1 Main Wind Force Resisting System,Part 2[h<60 ft(h<18.3 m)J:Design Wind Pressures for <br /> Enclosed Buildings-Walls and Roofs <br /> 316 continues <br /> STANDARD ASCEISEI 7-16 <br />