The wiring pipe shall be fixed with direct head iron nails or direct head with ears
.
1.11 practice of reserved hole box in shear wall 1.12 the cable tray of distribution room is embedded in the hole, and the strong and weak current conduits entering the indoor distribution room are subject to secondary deepening design, arrangement and concealed laying in the electric shaft; Moreover, it shall be laid behind the corresponding bridge frame or distribution box and installed with crossing box or junction box to ensure that the pipeline installation will not be messy during the construction of weak current subcontractor in the later stage
.
4) Special personnel shall be assigned to take care of the concrete to ensure that the reserved and embedded holes shall be free of displacement, deviation and skew
.
Take over when the secondary masonry is
. 
At the same time, it is the decoration quality of the later pipe well, so as to ensure that the overall feeling after installation is good and meets the construction quality requirements
. 
The operation is simple and recyclable, so as to ensure that the box is embedded at one time
.
The sequence is correct, neat and the contact surface is seamless
.
For the fabricated PVC pipe joint with nails, nail the nails on the PVC pipe into the beam bottom formwork with the help of short reinforcement
.
Determine the distance from the wall of the drainage pipe and the position of the reserved PVC water stop joint according to the drawings
.
1.5 conduit embedding 1) the design and construction drawings for the embedded layout of conduit and junction box generally have no position and size
.
2.3 when the casing between pipes is embedded in the main construction, the secondary deepening arrangement of the pipeline shall be done first, and the one-time concrete pouring shall be used to reserve the casing construction, so as to ensure the pouring quality of the floor and save labor
.
6) The conduit extending upward or downward out of the structural surface shall be vertical, and the exposed length shall be 5cm (the welded connecting conduit can be extended appropriately), and the spacing of multiple extended conduits shall not be less than 15mm
.
1.3 the optimized design of the distribution room shall be comprehensively arranged
Purchase schedules shall be formulated according to the project progress nodes
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The process shall verify whether the goods enter the site in advance, formulate various goods entry checklist, and inspect the goods according to the schedule
.
2) The steel formwork box shall be cleaned and coated with release agent
.
1.3 in the early stage, the distribution box shell shall be expanded by 5cm according to the design, the mold shall be processed, the internal reinforcement shall be done, and the sealing shall be done to avoid mold expansion and slurry leakage
. 
8) Galvanized iron wire shall be used to bind and tie the pipeline every LM, and a fixed binding point shall be added at the center point of the arc and 300 ~ 500mm at both ends of the junction box and the turning part
.
The direct head shall be nailed at the position in the beam to be led down, the pipe head shall be inserted into the direct head, and the connection shall be firm and tight
.
According to the design requirements of plumbing, the reservation and embedding of plumbing main body shall ensure that it meets the construction specifications and standards, and optimize the layout of the reserved hole size and spacing for its actual function
.
When it is PVC and other non-metallic conduit, the protective opening shall be set at the place where the conduit enters the junction box
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Fill the water stop joint with yellow sand in plastic bags to prevent the inner wall of the water stop joint from being polluted during the pouring of cast-in-situ slab
.
It is required to determine the specific size according to various functions and specifications
. 
For the works in the public parts without ceiling, the lamps, smoke detectors and various crossing boxes shall be embedded in line, centered and symmetrical
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2) Before the main body embedding construction, the wall (if the wall is built in the middle of the beam or on the left or right of the beam) and the opening position must be identified according to the architectural construction drawing
.
5) When the conduit enters the junction box, the connector distributed by the manufacturer shall be used as required, and the set screw shall be tightened
.
2) When the hollow brick wall is built, the prefabricated parts of the distribution box are directly built into the wall to reduce the hollowing phenomenon
.
2、 Secondary piping for water and electricity installation 1
. 
The PVC line pipe is arranged by formwork opening and positioning, the pipe spacing is consistent, and the opening formwork is protected
.
3) Photos of prefabricated parts of distribution box and formal practices for later installation (directly pouring the box shell into fine aggregate concrete)
.
1.8 arrangement of junction boxes on the roof of common parts and installation of junction boxes on the roof of common parts of residential buildings
.
1.9 the lower drainage pipe of the embedded box on the floor and the single pipe are fixed and protected
.
2
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2.1 circular reserved holes shall be reserved in the floor slab, and shaped casing tools shall be used
. 
2) One galvanized flat steel-40 is usually laid in the distribution room vertically × 4 as the grounding bus, another 1-25 is horizontally laid along the shaft wall × 4 flat steel shall be connected with it, and the thickness shall not be less than 4mm ² The copper braided belts are connected with each other, and the bridge, support and distribution box must be connected with the grounding bus.
.
2) the PVC wire box is counted through the physical engineering quantity, the upper box is connected to the processing box, the metal lug is painted with anti-corrosion paint to dry, the upper pipe is blocked, and the plug filler is used to block the box mouth, which is classified as the upper shelf
. 
7) The inner wall of welded steel pipe must be provided with anti-corrosion measures
.
1.2 the distribution box shall be installed with complete fittings, lock head assembly, crimping and tinning of wire head, standard wiring color, neat wiring in the box, complete circuit identification and purpose identification, and neat shell
. 
1) the reserved hole position shall be correct, and the size of the hole shall meet the design and specification requirements
.
When reserving, pay attention to the displacement of the wall, properly adjust the position of the water stop joint according to the displacement, and control the verticality of the upper and lower water stop joints
.
2.2 embedding of water stop joint sleeve in toilet in order to reduce the leakage of toilet in the later stage, toilet and floor drain shall be embedded with water stop joint sleeve
.
1) the conduits of strong and weak current entering the room in the distribution room shall be subject to secondary deepening design, arrangement and concealed laying in the electric well; Moreover, it shall be laid behind the corresponding bridge frame or distribution box and installed with crossing box or junction box to ensure that the pipeline installation will not be messy during the construction of weak current subcontractor in the later stage
.
For residential works, especially the position of the socket at the head of the bed in the bedroom and the socket near the TV, the conduit shall be reasonably arranged according to the relevant positions
. 
1.6 the method of connecting the embedded box in the shear wall
.
2.4 reserved hole for roof vent pipe 1) there is overlap between roof vent pipe and hood, so it is necessary to optimize the layout in advance, and reserve and install water stop joint steel sleeve
.
1.4 the secondary optimization design is required for the pipeline room, the accurate positioning of the pipeline casing is carried out, and the finished casing is made in place at one time to reduce the workload of subsequent hole plugging
.
3) In the underground garage, attention shall be paid to avoiding the centralized corridor of large air ducts and pipelines
. 
Secondary piping for electrical installation 1.1 installation of hollow brick wall piping and distribution box sleeve 1) ensure the flatness of the wall, avoid wall slotting in the later stage, lay a good foundation for the measured quantity and ensure the overall quality
.
Source: if there is any infringement in the mechanical and electrical world, please contact the delete one, the water and electricity installation pre embedding project 1, the electrical line box main body reserved, bury 1.1 materials control 1) according to the geographical environment, examine the entity project, the electromechanical professional designer has the conflict with the national, the land, the line, the enterprise (development, the construction) standard and the construction standard, if has the advance adjustment change
.
Electrical engineering 1.1 installation of switch and socket panel 1) before the installation of switch and socket panel, the panel must be installed after the closure of the junction box is completed
.
5) Control the formwork drawing time (the formwork drawing time shall be subject to the civil engineering requirements), the cave in will occur too early, and the formwork will be given too late, which will cause difficulties and damage the integrity of the cave
.
2) Materials and equipment must be selected, identified, sealed, ordered, etc., and node schedules shall be formulated
.
The construction dimension drawing, such as the position of the lower water inlet of the toilet seat, shall consider the thickness of the brick on the decorative wall to ensure the reserved spacing
.
1.10 the wiring pipe in the beam body shall be laid through the beam bottom plate
.
1.2 processing of semi-finished products 1) the steel wire box is counted through the physical engineering quantity, and the connector distributed by the manufacturer is used to block the pipe and plug the box mouth, which is classified as the upper shelf
.
The box is reinforced with angle steel and adjustable screw to prevent deformation
.
Fixing PVC water stop joint: fix the water stop joint on the formwork with hammer and steel nail
.
3、 Water and electricity installation and decoration stage 1
.
When there is no ceiling on the roof of common parts of residential buildings, detailed positioning dimensions must be made for the arrangement of junction boxes to ensure that they are arranged in rows
.
4) Products that do not meet the design requirements and specifications, and “three noes” products are prohibited from use
. 
4) When the lamp junction box is embedded in transformer, high and low voltage distribution cabinet, bridge, large pipe row and other parts, the reserved junction box position shall be optimized
.
3) Materials prohibited by national and industrial standards are strictly prohibited
.
3) The casing shall be fixed firmly and reliably, and the three-point fixing method shall be adopted
.
Do not blindly measure the position with a ruler from the drawing
. 
