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It is convenient for fighting and evacuation, and a circular fire lane should be set up. With the accelerating pace of urbanization, urban land is increasingly tight, which promotes the construction of high-rise buildings. Many high-rise buildings, due to poor consideration of fire prevention design and other reasons, have many congenital hidden dangers, and fires occur from time to time, causing heavy losses. In order to create convenient conditions for fire fighting and rescue work and ensure the safety of buildings, circular fire lanes should be set up around high-rise buildings. However, regardless of the size of the building, it is indeed difficult to require the circular fire lanes. Lanes can be set up along the two long sides of the building. In order to prevent the collapse of building components in case of fire from affecting the normal operation of the fire lane, the distance between the fire lane and the outer wall should be 5m. There should be no trees, overhead pipelines, etc. that hinder the operation of climbing fire engines between fire lanes and high-rise buildings. If the total length of the building exceeds 220m, a fire lane shall be set up to pass through the building. There is no inner courtyard in the building, there are ring fire lanes around it, and fire engines crossing the building need to be set up. Q: An L-shaped high-rise building has a total length of about 170m, a length of 120m along the street, and a length of 50m along the inner street (residential road). Do you want to set up fire lanes crossing the building? A: The relevant provisions of the "Construction Regulations" and "High Regulations" consider that there is no restriction on the length of the two wings on the premise of meeting the requirements of fire fighting and evacuation. The building only needs to set up a pedestrian passageway connecting the street and the inner courtyard at the part over 80m along the street, and there is no need to set up a fire lane. In the planning of fire lanes, in addition to the relevant provisions of the "Construction Regulations" and "High Regulations", attention should also be paid to板栗纳闷道：你这么小，懂什么四大皆空？会不会想出去玩，想吃肉吃鱼，想……他没说下去，因为这孩子娶媳妇还得几年工夫。要是你，怎么活？白果听了撅嘴，放下筷子，无心再吃。故事是以原作为基础的原创剧情。在男子学校－藤森学园有个公开的“公主”制度，就是让外表长的漂亮的学生打扮成女孩子的样子，以给校园生活增添情趣。以被选作为“公主”的丰实琴、四方谷裕史郎、河野亨的3人为首，由有个性的成员展现的每一天在某一天发生了变化。转校生花园音也设立了新的学生会，并率领对抗公主的“黑公主”，向原来的公主发起了挑战。在这里，学生会和新学生会，公主和黑公主的美丽又激烈的战争就此开始……