_雪荷载的基准压力,一般按当地空旷平坦地面上积雪自重的观测数据，经概率统计得出50年一遇最大值确定。屋面水平投影面上的雪荷载标准值，应按下式计算：Sk=μrxSo式中sk—雪荷载标准值(kN/㎡)；μr—屋面积雪分布系数；S0—基本雪压(kN/m2)。全国各城市的雪压和风压值全国各城市的50年一遇雪压和风压附表D.4省市名城市名海拔高度(m)风压(kN/m2)雪压(kN/m2)雪荷载准永久值系数分区n=10n=50n=100n=10n=50n=100北京54.00.300.450.500.250.400.45Ⅱ天津天津市3.30.300.500.600.250.400.45Ⅱ塘沽3.20.400.550.600.200.350.40Ⅱ上海2.80.400.550.600.100.200.25Ⅲ重庆259.10.250.400.45河北石家庄市80.50.250.350.400.200.300.35Ⅱ蔚县909.50.200.300.350.200.300.35Ⅱ_邢台市76.80.200.300.350.250.350.40Ⅱ丰宁659.70.300.400.450.150.250.30Ⅱ围场842.80.350.450.500.200.300.35Ⅱ张家口市724.20.350.550.600.150.250.30Ⅱ怀来536.80.250.350.400.150.200.25Ⅱ承德市377.20.300.400.450.200.300.35Ⅱ遵化54.90.300.400.450.250.400.50Ⅱ青龙227.20.250.300.350.250.400.45Ⅱ秦皇岛市2.10.350.450.500.150.250.30Ⅱ霸县9.00.250.400.450.200.300.35Ⅱ唐山市27.80.300.400.450.200.350.40Ⅱ乐亭10.50.300.400.450.250.400.45Ⅱ保定市17.20.300.400.450.200.350.40Ⅱ饶阳18.90.300.350.400.200.300.35Ⅱ沧州市9.60.300.400.450.200.300.35Ⅱ黄骅6.60.300.400.450.200.300.35Ⅱ南宫市27.40.250.350.400.150.250.30Ⅱ山西太原市778.30.300.400.450.250.350.40Ⅱ右玉1345.80.200.300.35Ⅱ大同市1067.20.350.550.650.150.250.30Ⅱ_河曲861.50.300.500.600.200.300.35Ⅱ五寨1401.00.300.400.450.200.250.30Ⅱ兴县1012.60.250.450.550.200.250.30Ⅱ原平828.20.300.500.600.200.300.35Ⅱ离石950.80.300.450.500.200.300.35Ⅱ阳泉市741.90.300.400.450.200.350.40Ⅱ榆社1041.40.200.300.350.200.300.35Ⅱ隰县1052.70.250.350.400.200.300.35Ⅱ介休743.90.250.400.450.200.300.35Ⅱ临汾市449.50.250.400.450.150.250.30Ⅱ长冶县991.80.300.500.60运城市376.00.300.400.450.150.250.30Ⅱ阳城659.50.300.450.150.250.300.35Ⅱ内蒙古呼和浩特1063.00.350.550.600.250.400.45Ⅱ额右旗拉布达林581.40.350.500.600.350.450.50Ⅰ牙克石市图里河732.60.300.400.450.400.600.70Ⅰ满洲里市661.70.500.650.700.200.300.35Ⅰ海拉尔市610.20.450.650.750.350.450.50Ⅰ鄂伦春小二沟286.10.300.400.450.350.500.55Ⅰ新巴尔虎右旗554.20.450.600.650.250.400.45Ⅰ_新巴尔虎左旗阿木古郎642.00.400.550.600.250.350.40Ⅰ牙克石市博克图739.70.400.550.600.350.550.65Ⅰ扎兰屯市306.50.300.400.450.350.550.65Ⅰ科右翼前旗阿尔山1027.40.350.500.550.450.600.70Ⅰ科右翼前旗索伦501.80.450.550.600.250.350.40Ⅰ乌兰浩特市274.70.400.550.600.200.300.35Ⅰ东乌珠穆沁旗838.70.350.550.650.200.300.35Ⅰ额济纳旗940.500.400.600.700.050.100.15Ⅱ额济纳旗拐子湖960.00.450.550.600.050.100.10Ⅱ阿左旗巴彦毛道1328.10.400.550.600.050.100.15Ⅱ阿拉善右旗1510.10.450.550.600.050.100.10Ⅱ二连浩特市964.70.550.650.700.150.250.30Ⅱ那仁宝力格1181.60.400.550.600.200.300.35Ⅰ达茂旗满都拉1225.20.500.750.850.150.200.25Ⅱ阿巴嘎旗1126.10.350.500.550.250.350.40Ⅰ苏尼特左旗1111.40.400.500.550.250.350.40Ⅰ乌拉特后旗海力素1509.60.450.500.550.100.150.20Ⅱ乌拉特中旗海流图1288.00.450.600.650.200.300.35Ⅱ百灵庙1376.60.500.750.850.250.350.40Ⅱ四子王旗1490.10.400.600.700.300.450.55Ⅱ化德1482.70.450.750.850.150.250.30Ⅱ杭锦后旗陕坝1056.70.300.450.500.150.200.25Ⅱ_包头市1067.20.350.550.600.150.250.30Ⅱ集宁市1419.30.400.600.700.250.350.40Ⅱ阿拉善左旗吉兰泰1031.80.350.500.550.50.100.15Ⅱ临河市1039.30.300.500.600.150.250.30Ⅱ鄂托克旗1380.30.350.550.650.150.200.20Ⅱ东胜市1460.40.300.500.600.250.350.40Ⅱ阿腾席连1329.30.400.500.550.200.300.35Ⅱ巴彦浩特1561.40.400.600.700....
