The specifications and models of the cable bridge frame shall conform to the requirements of site construction environment design, and the inspection of the inside and outside of the bridge frame should be intact, seamless burr, can not appear bending, bending and other phenomena, Installation accessories using angle steel column, arm, support, frame, fastening bolts, screw, nuts and other installation workpieces should be hot-dip galvanized to strengthen life to prevent corrosion.
2. Tool preparation
Electric hammer, impact drill, polishing machine, cutting machine (hacksaw cutting, can not be cut by electric gas welding to avoid destroying galvanized layer), pencil, tape measure, wrench, even when installing ladder bridge frame need to use electric welding machine, these are necessary tools.
1. The maximum load and support spacing of the cable bridge shall be less than the allowable load and the allowable support spacing, and shall not be manned in the installation works. If the on-site environment is really necessary, safety and security facilities shall be required to carry the personnel. Unqualified non-professional personnel must not be allowed to operate.
2. The surface treated columns, braces, etc., are fixed on the wall by expansion bolts (which must be used in concrete structures and solid brick walls, but not in hollow brick walls), and the site welding places are well treated with anticorrosion and anticorrosive paint is applied on the spot. When the cable bridge is laid, the support point between the bridges is set at about 1 / 4 of the span as far as possible.
3. For the long-span bridge, it is best to place the butt joint on the support frame, where the bend or three links need to be increased separately, the vertical support arm should be set up a fixed point every 1.5 meters or so.
4. The cables in the bridge frame shall be fixed by a clip or metal cable clip, the cables installed horizontally shall be fixed at intervals of 2 m, and the cables installed vertically shall be fixed at intervals of 1-1.5 m.
5. Do not allow the bridge through the walls and floors with holes sealed together, if it is through the firewall and fire prevention floor, fire insulation measures should be taken.
6. When the construction environment in the outdoor vertical installation of the bridge, prevent passers-by can be more hands to open the bridge cover, customizing the bridge to respond to the supplier in time to strengthen the butterfly buckle.
7. When the power cable and the control cable are not many, the cable can be laid on the same bridge frame, and the separate type bridge frame can be used to lay the cables of different grades separately.
8. If the construction site is high corrosion environment requirements, you can use stainless steel, aluminum alloy material bridge.
III. Security concerns
1. It is necessary to wear a helmet during construction.
2. Check to see if the skid rope is secure. Use a high stool or ladder to prevent two people from operating on it at the same time.
3. If the construction needs to light fire, prepare fire equipment, and to obtain on-site fire proof, clean up the surrounding flammable materials, send personnel to watch the fire, such as flame spread timely use of appropriate measures.
4. Transport bridge installation, pay attention to safety and as far as possible to prevent the bridge fire coating and galvanized layer off.