GB 50189-2015 第3.5.1条
| **** | **Shading measures**: For hotel buildings in hot summer and cold winter, hot summer and warm winter, and cold (partial) regions, when the window-to-wall area ratio of east, west, and south facades is ≥0.20, external windows (including transparent curtain walls) shall be provided with external shading or between-glass shading, and the shading coefficient shall comply with the relevant requirements of Table 3.3.6. |