The span of supports for horizontal installation of the bridge is 1.5m~2m, and the span of supports for vertical installation is no more than 2m. The two ends of the non-galvanized bridge connecting plate shall be bonded to the copper core grounding wire. The grounding hole shall be cleaned of the insulation coating. For vibration sites, in the connection of the grounding part should be installed spring coil. The distance between strong and weak electric Bridges should not be less than 200mm. The linear segment of metal bridge frame shall leave expansion joints of 20-30mm at intervals of 50m. The supporting hanger is made of materials. It is better to use expansion bolts to fix the hanger of metal bridge. Supports for vertical metal Bridges must be mounted reliably.
Attention for horizontal installation of bridge frame
1. The metal bridge and its bracket and the metal cable conduit introduced or drawn out must be reliably grounded or zero-connected, and the whole length and its bracket shall be connected with the grounding or zero-connected main line at no less than 2 places;
2. The two ends of the connection plate between non-galvanized Bridges shall be bonded with the copper core grounding wire. The minimum allowable load area of the grounding wire shall not be less than 4mm;
3. When the design is not required, the spacing of the brackets for horizontal installation of the bridge is 1.5~3m; The spacing of vertically mounted supports shall not be greater than 2m. If from the ceiling construction with expansion screw fixed rebar fixed ~ from the wall construction to use the Angle frame fixed;
4. The two ends of the connecting plate between galvanized Bridges shall not be bonded to the ground wire, but the two ends of the connecting plate shall be no less than 2 connection fixing bolts with anti-loosening nuts or anti-loosening washers.