What are the three treasures of industry

China's traditional crafts, three treasures: Beijing's cloisonné and Dezhen porcelain and Fuzhou lacquer. 1, "three treasures" refers to the use of safety nets for building construction protection, personal protection wear helmets and safety belts. To adhere to the correct use of wear, can avoid the occurrence of operator casualties, so called "three treasures". 2, "four" refers to the construction of the stairway, elevator mouth, access to the mouth, the reserved holes.

①Stairway: staircase railings should be installed with the floor, if installed after the two steel pipe protection must be used. ② elevator entrance: 1.2 m high steel door or steel pipe protection, the first floor of the elevator shaft and the first floor above every four steps (two floors) and up to 10 meters apart a horizontal safety net.

3 reserved holes: holes for 25 to 50 centimeters, sealed with wire mesh or cover plate fixed. The hole is 50 to 150 centimeters, sealed with steel mesh. Hole for more than 150 centimeters, surrounded by protective railing, hanging in the middle of the flat mesh. 3, "five sides" refers to: not yet installed balcony railing around the perimeter of the level of protection of the perimeter of the outer frame, frame works around the perimeter of the floor, up and down the runway and ramps on both sides of the side of the edge, the side of the unloading platform.