(1) The establishment and construction management of fastener type steel pipe external scaffolding in construction reflects the unique image and standardized construction ability of the enterprise. This standard is formulated in accordance with relevant national and local safety technical specifications, and includes the "Internal Standards for the Establishment of External Scaffolding in Construction Projects".

(2) This standard provides specific statements on the facade image, structural requirements, erection and dismantling, inspection and acceptance, and management requirements of external scaffolding. It also refines the construction methods for some special parts, including balconies, bay windows, external elevator unloading platforms, elevator shafts and lighting shafts, and building corners.

(3) If the specific content of this standard does not comply with the requirements of relevant national and local safety technical specifications, the relevant national and local safety technical specifications shall prevail.

2、 Basic parameter requirements

(1) Material requirements for steel pipes: Q235 ordinary steel pipes specified in national standards GB/T13793 or GB/T3091 should be used for steel pipes, and the model should be Φ 48.3 × 3.6mm (calculated according to the scheme of Φ 48 × 3.0mm). The material should provide a product qualification certificate and undergo acceptance before being put into use.

(2) When fasteners enter the construction site, the product qualification certificate should be checked, and sampling retesting should be conducted. The technical performance should comply with the national standard "Steel Pipe Scaffold Fasteners". The appearance of the fasteners should be checked for cracks, and no damage should occur when the bolt tightening torque reaches 65N · m.

(3) The steel pipes of the external scaffolding must undergo rust prevention treatment, and after rust removal, apply one layer of rust proof paint and two layers of topcoat.

(4) The wooden scaffold board model is 3000 (6000) × 200 (250) × 50, and both ends are tied with Φ 1.6mm galvanized iron wire; The steel mesh scaffold is made of HPB235 Φ 6 steel bars with a section spacing of 40mm, and fixed on the small horizontal bar with Φ 1.6mm galvanized iron wire.

3 steel pipe colors

(1) Yellow paint: scaffold uprights, large and small crossbars, longitudinal and transverse sweeping rods.

(2) Red paint: wall connecting components.

(3) Yellow black dual color paint: protective railings on the outside of scaffolding, ramp, and unloading platform.

(4) Red and white two color paint: cross bracing, horizontal slant support, skirting board, stair edge protective railing, construction elevator unloading platform edge protective railing.

(5) If the color of the schematic diagram does not match the description in the text, the color described in the text shall prevail.

Example diagram of protective railing

4. Exterior facade image

(1) The outer protection of the scaffold must be enclosed with qualified dense mesh safety nets. The company logo ("Company" banner) and promotional slogans should be set up on the outer shelf. Ensure that the external frame is coordinated and aesthetically pleasing, reflecting the characteristics of the enterprise.

Example diagram of scaffolding

5-piece configuration

(1) Four upright poles should be installed at the corners of the frame, and the large horizontal bars should be connected and sealed.

(2) Vertical and horizontal bars must be installed at the main node.

(3) The upright pole must be butt jointed except for the top layer, and the large horizontal bar can be overlapped outside the corner of the frame. Scissor braces must be overlapped.

(4) Scissor braces and wall connecting components must be erected and removed synchronously with the external scaffolding. It is strictly prohibited to install or dismantle later.

6 Pole foundation

(1) The height of the floor standing scaffold should not exceed 35m. Unloading measures must be taken when the height is between 35-50m, and when the height is greater than 50m, unloading measures must be taken and expert verification of the special plan must be conducted.

(2) The foundation of the scaffold should be leveled, compacted, and hardened with concrete. The foundation should be hardened with 100mm thick C25 concrete, and a base or pad should be set at the bottom of the pole. The pad should be made of wooden pads with a length of no less than 2 spans, a thickness of no less than 50mm, and a width of no less than 200mm.

(3) Floor standing scaffolding must be equipped with vertical and horizontal sweeping rods, and the vertical sweeping rods should be directly fastened to the upright rods immediately below the vertical sweeping rods. When the foundation of the upright pole is not at the same height, the vertical sweeping pole at a higher height must be extended two spans to a lower position and fixed to the upright pole. The height difference should not exceed 1m, and the distance between the axis of the upright pole above the slope and the slope should not be less than 500mm.

(4) The scaffold foundation should consider the surrounding drainage measures, and the bottom elevation of the scaffold base should be 50mm higher than the outdoor natural floor. A drainage ditch with a cross-section of not less than 200mm × 200mm should be set on the outer side of the pole foundation to ensure that the scaffold foundation does not accumulate water.

Scaffold foundation drainage ditch diagram

Sectional drawing of scaffold foundation

Schematic diagram of steel base

7 Facade Protection

(1) The outer side of the scaffold is covered with a dense mesh safety net, with a mesh size of not less than 2000 mesh/100cm2. When the net is vertically connected, a mesh connection method is used, and each mesh is fixed with 16 # iron wire and steel pipe. When the net is horizontally connected, a lap joint method is used, with a lap length of not less than 200mm. Wooden beams should be installed as lining at the corners of the frame to ensure the aesthetic appearance of safety wire strips at the corners of the frame.

(2) Starting from the second step, a 180mm toe board shall be installed at the bottom of the outer side of the scaffold, and a protective railing of the same material shall be installed at a height of 600mm and 1200mm respectively. If the inner side of the scaffold forms a edge, follow the protective measures for the outer side of the scaffold.

(3) The surface of the scaffolding's outer row uprights and crossbars shall be painted with yellow paint, and the surface of the guardrail shall be painted with yellow black dual color paint. A 200mm high warning tape shall be set every 3 layers or 9m on the exterior facade, fixed on the outside of the uprights. The size of the warning tape is shown in the diagram, and the surface is painted with red and white warning colors.

Elevation drawing of toe board and protective railing

Schematic diagram of warning tape

8 levels of protection

(1) The homework layer must be fully covered with scaffolding boards, and the distance between the scaffolding boards and the building structure should not exceed 150mm.

(2) The second floor of the landing frame, the first floor of the cantilever frame (climbing frame), and the middle floor shall not exceed 10m and not exceed three floors, and shall be fully covered with a hard partition for protection. A horizontal mesh shall be hung in the middle of the two layers of hard protection, and the horizontal mesh must be hung to the building structure.

(3) The distance between the inner upright of the scaffold and the net distance of the body is generally not more than 200mm. If it is greater than 200mm, a flat and firm standing piece must be laid. When the gap between the scaffold board of the working layer and the building is greater than 150mm, it should be fully enclosed to prevent personnel and materials from falling.

9 wall connecting components

(1) The surface of the wall connecting components should be painted with red and eye-catching paint for easy inspection and warning.

(2) Scaffolding must use rigid wall connecting components.

(3) Wall connecting components should be installed starting from the first longitudinal horizontal bar on the ground floor. When there are difficulties at this location, reliable measures should be taken to fix them. Wall connecting components should preferably be arranged in diamond shapes, but can also be arranged in square or rectangular shapes.

(4) Wall connecting components should be placed close to the main node, and the distance from the main node should not exceed 300mm

(5) The spacing between wall connecting components should be calculated according to the design specifications and comply with the maximum spacing for wall connecting component layout in the table below.

(6) The two ends of the straight and open scaffolding must be equipped with wall connectors, and the vertical spacing between the wall connectors should not exceed the height of the building and should not exceed 4m (two steps).

10 Cross bracing and transverse slant support

(1) Scissor braces should be continuously set from the bottom corner of the scaffold from bottom to top, and the surface of the scissor braces should be painted with red and white warning colors.

(2) The number of diagonal braces crossing the upright pole should be determined according to the provisions in the table below. The width of each diagonal brace should not be less than 4 spans and should not be less than 6 meters. The inclination angle between the diagonal brace and the ground should be between 45 ° and 60 °.

(3) For floor standing external frames below 24 meters, vertical continuous diagonal braces shall be installed on the outer ends, corners, and elevations with a spacing of no more than 15 meters. For floor standing external frames and all cantilever frames over 24 meters, continuous diagonal braces shall be erected on the entire facade outside the frame.

(4) The extension of scissor strut components should be done by overlapping, with an overlap length of no less than 1m and no less than 3 sturdy fasteners.

(5) The diagonal brace should be fixed to the extended end or upright of the intersecting horizontal bar using a rotating fastener, and the distance from the centerline of the rotating fastener to the main node should not exceed 150mm.

(6) Horizontal slant support must be set at the two fractures of straight and open double bent frame, and a horizontal slant support shall be set at the corner of frame body and every six spans in the middle of frame body above 24m.

(7) The transverse slant support shall be arranged in a zigzag shape from bottom to top in the same section, and the slant support shall be connected to the top by crossing with the inner and outer crossbars.

11 ramp

(1) When the height of the sidewalk and high-quality material transportation ramp is not more than 6m, a straight line should be used, and when the height is greater than 6m, a zigzag line should be used.

(2) The width of the material transport ramp should not exceed 1.5m, with a slope of 1:6. The width of the pedestrian ramp should not be less than 1m, with a slope of 1:3.

(3) A platform should be set up at the turning point, with a width not less than the width of the ramp. Double protective railings with heights of 1.2m and 0.6m and 180mm toe boards should be installed on both sides of the ramp and the periphery of the platform. The surface of the protective railings should be painted with yellow and black warning colors, and the surface of the toe boards should be painted with red and white warning colors.

(4) The ramp should be attached to external scaffolding or buildings, and its various facades should be equipped with diagonal braces. A dense safety net should be hung on the outside of the ramp for closure.

(5) The foundation of the ramp is consistent with the foundation of the external scaffolding, and the connecting wall components of the ramp are set according to the requirements of the open scaffolding.

(6) The ramp should be fully covered with scaffold boards, and the material transport scaffold should use wooden boards with a thickness of not less than 40mm. Pedestrian ramps can be fully covered with wooden boards or bamboo strips. The ramp should also be equipped with anti slip strips with a thickness of 20-30mm and a spacing of not more than 0.3m. The scaffold boards and anti slip on the ramp should be stable and firm.

12 Security Protection

12.1 Staircase edge protection

(1) When there is no reliable protection at the edges of stairs and rest platforms, protective railings should be installed. Three protective railings should be installed at heights of 1.2m and 0.6m, as well as at the bottom. A dense mesh safety net should be hung on the inside of the poles

(2) Protective facilities should be standardized and tooled.

(3) The upright pole is fixed with embedded parts or M12 expansion bolts

12.2 Tower crane operation platform and pedestrian access protection

(1) The tower crane must be equipped with an operating platform for wall attachment at the attached location, and the area of the platform should meet the requirements for use. Steel pipes or standardized operating platforms should be used.

(2) The operating platform attached to the wall must be equipped with a 1.2m high protective railing and a safety net. A toe board should be installed on the inside of the railing, and the bottom should be fully covered with scaffolding.

(3) When setting up a pedestrian passage for tower cranes, the passage should be fully covered with scaffold boards and securely fixed. The protective railings on both sides should not be less than 1.2m, and safety nets should be hung on the inside of the railings. A 180mm high kickboard should be installed at the bottom and can only be erected at the attachment position.

(4) The pedestrian passage on the tower crane shall not be connected to the external scaffolding

12.3 Construction elevator platform protection

(1) Before setting up the unloading platform on the floor of the construction elevator, a special construction plan must be prepared. For those with a height exceeding 24m, measures should be taken for unloading. It is prohibited to set the vertical pole continuously from bottom to top.

(2) The floor unloading platform should be set up separately and is strictly prohibited from being connected to the external frame. The height of each layer should not be less than 2 meters, and 2 protective railings with a height of 1.2 meters should be installed on both sides of the platform. A 200mm high toe board should be installed at the bottom, and both the protective railings and toe boards should be painted with red and white warning paint. A safety mesh should be hung on the inside of the pole. The floor unloading platform board must be thick, firm, and tightly laid, using 5cm thick wooden boards or anti slip steel plates.

(3) Install a 1.8-meter-high vertical open normally closed inward opening metal protective door at the exit of the construction elevator platform, preferably using a tool type protective door.

(4) The middle of the two protective doors of the floor unloading platform should be sealed with a template, painted with blue paint and marked with floor markings.

12.4 Safety Passage Protective Shed

(1) The entrance and exit of buildings must be equipped with safety passage protective sheds, which have functions of anti smashing, rainproof, and impact resistance.

(2) Within the impact range of lifting and the radius of building falling, channels, material processing areas, material elevator feed ports, external elevator ground feed ports, and other areas that require prevention of falling objects from high altitude must be equipped with double-layer protective sheds to prevent penetration. The double-layer protective sheds (spaced 600mm apart) must be fully covered with materials that can withstand uniformly distributed static loads greater than 10KPa (50mm thick wooden boards or other materials that comply with regulations).

(3) The front facade of the safety passage shed should be equipped with safety slogans and warning signs.

(4) A safety education cultural wall or safety education propaganda comic should be set up in the safe passage, with a height of 1-2 meters, using outdoor spray painting.

(5) The height of the safety passage shed pole above the ceiling should not be less than 700mm. A dense safety net should be hung on both sides of the elevated part of the ceiling, and the safety net should be set on the inside of the pole.

(6) Both sides of the safety passage are enclosed with dense mesh safety nets.

(7) The width x height of the safe passage for vehicles should be greater than 4000mm x 4000mm.

(8) The pedestrian safety passage should have a width x height greater than 3500mm x 4000mm.

13 Suspension Frame

13.1 Basic provisions

(1) Before setting up the cantilever scaffold, a special construction plan must be prepared, which must include the layout plan of the cantilever beam positioning. The height of segmented installation should not exceed 20m, and if it exceeds 20m, experts should be organized to conduct a scheme demonstration.

(2) The cantilever beam of the cantilever scaffold must be made of I-beams not less than 16 gauge, and the anchorage end length of the cantilever beam should not be less than 1.25 times the length of the cantilever end. The cantilever length should not be too long.

(3) Two anchor rings (spaced 20cm apart) with a diameter of 16mm or more should be installed at the end of the cantilever beam anchor ring. Each steel beam end is equipped with a diagonal steel wire rope with a diameter of over 14mm, and the upper lifting ring is pre embedded with a diameter of 20mm round steel.

(4) The specific specifications and models of I-beams, anchoring screws, and diagonal steel wire ropes should be determined based on the plan and calculation sheet in addition to meeting the above requirements.

(5) The bottom of the scaffold should be equipped with sweeping rods along the longitudinal and transverse directions according to the specifications. Short steel bars should be welded on the surface of the cantilever beam to fix the upright rods. Wooden beams should be laid along the length direction of the scaffold above the horizontal bars, and full formwork should be laid for protection.

(6) All external frame uprights of the cantilever frame must be seated on the steel beam, and the cantilever beams at the external corners should be arranged in a fan-shaped (radial) manner. When the uprights near the corners cannot be directly installed on the cantilever steel beam, auxiliary steel connecting beams (flat support beams) should be laid along the longitudinal direction of the external frame on the cantilever beam, and the external frame uprights should be installed on the auxiliary steel beam without hanging legs (lower suspension).

(7) Continuous diagonal braces are erected along the entire surface of the facade.

(8) The wall connecting components of the cantilever frame should be set up in two steps (two spans per floor).

Fixing of 13.2 Type Steel Beam

(1) Fixation of steel beams: The fixation of steel beams to the main concrete structure can be achieved by using pre embedded bolts or anchoring with steel pull rings, and fasteners are not allowed for connection.

(2) When using steel reinforcement pull rings for anchoring, the pull rings should be anchored into the floor slab for 30d and pressed under the steel reinforcement in the lower layer of the floor slab. If the thickness of the concrete protective layer of the steel reinforcement cannot be guaranteed, the pull rings can also be pressed on top of the steel reinforcement in the lower layer of the floor slab. At the same time, two steel bars with a diameter of 14-16mm should be added on each side of the upper part of the pull rings, and firmly tied to the steel reinforcement in the floor slab to ensure that the pull rings will not be pulled out

(The use of threaded steel is prohibited for steel bar pull rings).

(3) The anchor ring is pre embedded before concrete pouring, and the screw threads are protected with tape. When the plate thickness at the anchor ring is less than 120mm, 2 Φ 12, 1m long steel bars are added at the anchor foot.

Pre embedded ring one

Pre embedded ring 2

13.3 Protection of Suspension Frame

(1) The outer side of the cantilever must be enclosed and sealed with a qualified dense mesh safety net. The safety net should be tightly hung with no less than 18 # lead wire, and should be hung on the inner side of the cantilever pole. It is not allowed to enclose the safety net on the outer side of each pole.

(2) When the distance between the scaffolding and the building is greater than 20cm, a pedestrian walkway should be installed. In addition to the 1.2m high protective railing and 180mm high kick bar on the outer side of the cantilever, corresponding protection should also be provided when encountering edges on the inner side of the cantilever (such as large open windows, door openings, etc.).

(3) The bottom of the cantilever external scaffold (at the cantilever beam) should be tightly sealed with hard protection (formwork), and the bottom surface of the hard protection (formwork) should be painted with yellow and black alternating paint.

(4) The lifting operation layer and bottom layer should be protected by qualified safety nets or other measures for segmented enclosed protection.

Example diagram of cantilever frame protection

13.4 Special parts of cantilever frame construction method

14 Basket Scaffolding

(1) The suspended scaffolding adopts standardized products produced by the manufacturer, and should have design standard books, product qualification certificates, installation, use, maintenance instructions and other materials.

(2) The hanging basket should be equipped with an upper travel limit device.

(3) Each lifting point of the suspended basket should be equipped with 2 steel wire ropes, and the safety steel wire ropes should be equipped with safety locks or independent safety devices for the same operation. During normal operation, the safety wire rope should smoothly pass through a safety lock or an independent safety device with the same function. The safety rope should be used within the effective standard period, which should not exceed one year.

(4) Under normal working conditions, the ratio of the anti overturning moment to the overturning moment of the suspension mechanism of the suspended basket shall not be less than 2.

(5) The beam should be securely riveted, and the upper part should meet the design requirements. The hanging basket should be installed according to the design or construction plan, and the lifting facilities should be sensitive and reliable, with automatic safety devices. The hanging basket can only be put into use after passing the load test after the first assembly.

15 Unloading Platform

15.1 Suspended unloading platform

(1) The cantilevered steel platform must be designed and calculated before production, and a special plan must be prepared and manufactured, installed, and used according to the special plan.

(2) The rated load capacity of the cantilever unloading platform should generally not exceed 1 ton, and the effective loading area should generally not be less than 7 square meters or exceed 9 square meters.

(3) The unloading platform should be welded with steel sections to form the main frame, and the model of the main cantilever beam should not be smaller than 18 # channel steel (or 16 # I-beam). The anchor end should be pre embedded with a ø 20 U-shaped ring, and should not be buried in the structural cantilever part

(4) The diameter of the steel wire rope should be determined based on calculation and not less than ø 21.5. Two independent diagonal steel wire ropes should be installed on both sides of the platform, connected to four tension points. The angle between the diagonal steel wire rope and the platform should be greater than 45 °, and the number and spacing of rope clamps should be set according to the specifications.

Schematic diagram of side elevation of cantilever platform 1

Schematic diagram of side elevation of cantilever platform 2

(5) The unloading platform should be independently set up, and the platform's support points and upper tension points must be firmly fixed to the building structure. It is strictly prohibited to set them on construction facilities such as scaffolding.

(6) The bottom of the unloading platform should be welded and fixed with patterned steel plates, and the gap between it and the outer frame should also be well sealed. The platform shall be covered with wooden boards or templates with a thickness of not less than 5cm and must be firmly fixed. The two sides and front of the platform shall be vertically enclosed with templates to prevent debris from falling.

(7) Fixed protective railings are installed on both sides of the unloading platform, and their uprights are welded and fixed to the main cantilever beam. The height of the protective railing should not be less than 1.5m, and a 180mm high toe board should be installed underneath. The platform should be enclosed with hard materials on both sides and in front.

(8) The surface of the protective railing is painted with yellow and black alternating paint, and the skirting board is painted with red and white warning paint, with a spacing of 300-400mm.

Node Details

(9) Loading limit signs should be hung on the unloading platform, and overloading is strictly prohibited. A protruding section with a length of no less than 1m can be installed at the front of the platform, and a safety net can be hung to transport longer steel pipes.

(10) The unloading platform should be inspected and recorded after each installation. After passing the acceptance inspection, hang the acceptance certificate and hang the load limit sign.

This is a gap in the scaffolding, and a safety net should be hung when in use. A special anti slip scaffold board should be laid on the net for use on the floor.

15.2 Floor standing unloading platform

(1) The foundation of the floor type unloading platform should be compacted or hardened in advance to meet the bearing capacity requirements. Wooden pads or steel bases should be set at the bottom of the uprights, and longitudinal and transverse sweeping rods should be added. Scissor braces should be fully installed along the circumference of the platform.

(2) The height of the floor type unloading platform should not exceed 20m.

(3) The spacing, step distance, and installation height requirements of the steel pipe fastener floor type unloading platform are determined through calculation and comply with the requirements of scaffolding specifications. It is strictly prohibited to connect it with the external frame and formwork support frame

(4) Set up protective railings near the edge and hang safety warning and load limit signs. The platform board is laid tightly without leaving any gaps.

(5) The floor type unloading platform should be inspected and recorded after each installation.

Schematic diagram of floor type unloading platform

16 Scaffolding construction

16.1 Construction

(1) The height of the scaffold pole should exceed the working layer by 1.2m.

(2) The top railing of the scaffold pole should be 1m higher than the upper end of the parapet wall and 1.5m higher than the upper end of the eaves

(3) The height of a single row scaffold shall not exceed 24m; The height of double row scaffolding should not exceed 50m. For double row scaffolding with a height exceeding 50m, measures such as double tube pole erection or segmented unloading should be taken.

(4) The height of each section of the cantilever scaffold shall not exceed 20m.

(5) When starting to set up scaffolding poles, a throwing brace should be set every 6 spans until the connecting wall components are installed stably, and then removed according to the situation.

(6) Scaffolding must be erected in accordance with the construction schedule, and the height of one erection should not exceed two steps above the adjacent wall connecting components. If it is not possible to set up connecting wall components beyond two adjacent steps, measures such as bracing and fixing should be taken to tie them to the building structure.

16.2 Scaffold Demolition

(1) During the process of dismantling scaffolding, the work area should be divided, surrounded by fences and warning signs, and directed by a dedicated person. Non scaffolding workers are prohibited from entering the safety alert area. If the safety officer or alert officer leaves midway, construction is not allowed.

(2) The dismantling of scaffolding must be carried out layer by layer from top to bottom, and simultaneous work from top to bottom is strictly prohibited; Wall connecting components must be dismantled layer by layer along with the scaffold, and it is strictly prohibited to dismantle the entire or several layers of wall connecting components before dismantling the scaffold; When the height difference during segmented demolition is greater than two steps, additional wall connecting components should be added for reinforcement.

(3) All dismantled rods and accessories must be tied with ropes and placed down as they are dismantled, or lifted down by vertical transport machinery. It is strictly prohibited to throw them down casually. The transported rods should be neatly stacked at all times.

17 Scaffold Inspection and Acceptance

(1) External scaffolding, tool scaffolding, unloading platforms, etc. are organized by the chief engineer and project manager, and the scheme preparer, technical director, safety officer, and construction team participate in the acceptance inspection. After passing the acceptance inspection, and hanging the acceptance certificate (including the installation location, installation person, acceptance person, acceptance date, and acceptance certificate), it can be used.

(2) Scaffolding tags come in two colors. Blue indicates that the scaffold has been inspected and meets the design requirements, and can be used. The red color indicates that the scaffold has not been fully erected or is unqualified and cannot be used; In addition, in special circumstances such as weather conditions, climbing is prohibited and this card is also used.

18 Scaffolding Management Requirements

(1) Before the erection of the framework, the project should prepare a special construction plan and submit it to the higher authorities for approval. The chief engineer of the project should organize scheme disclosure and keep disclosure records, and on-site operators should strictly follow the scheme.

(2) Subcontracting units engaged in the installation of steel pipe scaffolding on construction sites must possess the "Scaffolding Operation Subcontracting Enterprise Qualification" and "Safety Production License" issued by the competent construction administrative department. It is strictly prohibited to undertake business beyond the scope of the qualification license or engage in illegal activities such as qualification transfer or affiliation.

(3) The personnel responsible for installing and dismantling scaffolding must be professional scaffolders who have passed the assessment. Scaffolders should hold certificates before taking up their posts.

(4) Scaffolding personnel must wear safety helmets, fasten safety belts, and wear non slip shoes.

(5) Strictly control the construction load, and the scaffold board shall not be piled up in a concentrated manner. The construction load during the structural stage shall not exceed 3KN/㎡, and the construction load during the decoration stage shall not exceed 2KN/㎡.

(6) During the use of scaffolding, it is strictly prohibited to remove the longitudinal and transverse horizontal bars, longitudinal and transverse sweeping rods, and wall connecting components at the main nodes.

(7) It is strictly prohibited to use scaffolding as a load-bearing point for lifting heavy objects. It is strictly prohibited to fix cable wind ropes, concrete pumping pipes, cables and other facilities and equipment on construction scaffolding.

(8) Scaffolding installation and dismantling operations should be stopped when there are strong winds of level six or above, dense fog, rain or snow weather. After rain and snow, anti slip measures should be taken for shelving operations, and snow should be swept away.

(9) When the safety net needs to be temporarily removed during construction, it should be restored in a timely manner after the operation is completed and can only be used after inspection.