民用建筑设计统一标准GB50352-2019

6.7.3 阳台、外廊、室内回廊、内天井、上人屋面及室外楼梯等临空处应设置防护栏杆，并应符合下列规定：
2） 临空高度在24m以下时，栏杆或栏板高度不应低于1.05m，临空高度在24m及以上时，栏杆或栏板高度不应低于1.10m；学校、商业、医院、旅馆、交通等建筑的公共场所临中庭的栏杆或栏板高度不应小于1.20m。
3）栏杆或栏板高度应从所在楼地面或屋面至栏杆扶手顶面垂直高度计算，如底部有宽度大于或等于0.22m，且高度低于或等于0.45m的可踏部位，应从可踏部位顶面起计算。
4 ）栏杆离底面0.10m高度范围内不宜留空；

Uniform Standardsfor Design of Civil Buildings GB 50352—2019

6.7.3 Guard railshall be installed at air free sections such as veranda, lanai, indoor

corridor,interior patio, accessible roof and exterior stairway, and shall comply withthe

followingprovisions:

2) When air free height is lessthan 24m, railing height shall not be less than 1.05m;

when air freeheight is 25 m or more than 24m, railing

height shall notbe less than 1.10m; The railing height facing theatrium in public places such as schools, businesses, hospitals, hotels andtransportation buildings should not be less than 1.20m.

3) Railing heightshall be calculated according to vertical height from building ground or roof to top surface of handrail; if there is stepped place at railing bottom,its width is larger than or equal to 0.22mand height is less than or equal to 0.45m, then, railing height shall becalculated from the top ofstepped place.

4) It isinadvisable to leave a blank in height of 0.10m from railing to the bottomsurface;