我们一定要保证我们所设计的桥架要有一定的安全性，其中就需要要求桥架的防火区段，一定要采用钢制材料，或者是不燃、阻燃的材料。桥架系统中应该具有十分可靠的电气连接性，并且对于金属桥架而言，一定要接地。当允许利用桥架的系统构成接地干线回路的时候，要严格的符合标准规范的要求，也就是说在桥架的端部之间连接的电阻应小于或者等于0.00033欧姆，并且接地孔要清除绝缘涂层。在1KV或者以下的中性点的直接接地系统中，受电设备的接地要与系统中性线接地相连，在安装有处动切断供电装轩时，桥架的级长方向金属横截面积不低于规定值。对于振动场所，在接地部位的连接处应设有弹簧圈，沿桥架全长另敷设接地干线时，每段桥架都应该至少有一点与接地干线进行可靠性的连接。
We must ensure that the bridge we designed must have a certain degree of safety, which requires the fire-proof section of the bridge, must use steel materials, or non-flammable, flame-retardant materials. Bridge system should have very reliable electrical connectivity, and for metal bridge, must be grounded. When the bridge system is allowed to form a grounding trunk circuit, it must strictly comply with the dianzugui.37ix.com.cnmuzhisuxw.37ix.com.cnbianyaqi.37ix.com.cn shidiaogyp.37ix.com.cnhaibaiyu.37ix.com.cnshengtaim.37ix.com.cnrequirements of the standard specifications, that is to say, the resistance between the ends of the bridge should be less than or equal to 0.00033 ohms, and the grounding holes should be cleared of insulation coating. In the direct grounding system of neutral point below 1KV, the grounding of the receiving equipment should be connected with the grounding of the neutral line in the system. When the power supply installation is cut off dynamically somewhere, the metal cross-sectional area of the bridge's stage-length direction is not less than the prescribed value. For vibration site, spring coils should be installed at the connection of grounding part. When grounding trunk lines are laid separately along the whole length of the bridge frame, at least one point of each bridge frame should be connected with the grounding trunk reliably.