"Four ports" refers to: stairs, elevator ports, reserved holes and access ports; (Some also include cage mouth and wellhead).
"Five realms" refers to:
1, ditches, pits, grooves and the periphery of deep foundation.
2. On the floor.
3. The side of the stairs.
4, platform or balcony edge.
5. Near the roof.
Extended data:
Protection measures for one or four ports
1, the reserved hole on the floor is larger than 1.5m, surrounded by double steel pipe guardrails, with a safety net in the middle pocket, and the hole smaller than 1.5m can also be tightly closed with wooden boards.
2. Ladder mouth is protected by double-layer steel pipe, preferably by structural guardrail.
3. Self-made welded steel bar automatic door (up-and-down opening type) should be adopted at the elevator wellhead, which can be opened and closed and fixed firmly.
4. Safety protection shed shall be erected above the hole on the construction site.
Secondly, five border control measures.
1, the edge of deep foundation, the edge of stairs, the periphery of roof, the periphery of lighting well, the periphery of transfer platform, the edge of balcony, both sides of pedestrian passage and unloading platform must be protected by two steel pipes, and the steel pipes should be painted with red and white signs.
2. Two protective railings must be erected on the outer side of the temporary shelf used for binding and strengthening side beams and columns.
3, tic-tac-toe crane and cargo elevator unloading platform must be installed on the side of the protective door. The protective door must be a switch door welded with steel bars, and bent steel bars are not allowed to be used as protective doors.
4, limb operations, must set up safety warning signs.
5. When the outside of limb operation is close to the street, in addition to setting protective railings, scaffolding and safety nets, hard sealing measures such as static bar should be taken on the facade to prevent falling objects from hurting people during construction.
Baidu Encyclopedia-Three Treasures (Three Treasures of Architecture)
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