What are the specific dimensions of the safe passage protective shed?

What are the specific dimensions of the safe passage protective shed? Below Zhongda Consulting brings you an introduction to relevant content for your reference.

Technical Specifications for Safety in Construction at Heights (JGJ80-91)

Chapter 1 General Provisions

Article 1.0.1 In order to During the operation, we must implement the policy of safe production, ensure clear protection requirements, and ensure that the technology is reasonable and economically applicable. This specification is formulated.

Article 1.0.2 This specification is applicable to edge, opening, climbing, suspended, operating platform and intersection operations during the construction of industrial and civil housing buildings and general structures at high altitudes.

Article 1.0.3 The work at heights referred to in this specification shall comply with the national standard "Classification of Work at Heights" GB3608-83 "Any fall height above 2m (including 2m) above the reference plane ) work at heights where there is a possibility of falling”.

Article 1.0.4 When working at heights, in addition to implementing this specification, it should also comply with the current national regulations on working at heights and safety technical standards.

Chapter 2 Basic Provisions

Article 2.0.1 Safety technical measures for high-altitude operations and the materials required must be included in the construction organization design of the project.

Article 2.0.2 The person in charge of unit project construction shall be responsible for the safety technology of high-altitude operations of the project and establish a corresponding responsibility system.

Before construction, safety technical education and briefings should be carried out step by step, and all safety technical measures and personal protective equipment should be implemented. Construction shall not proceed without implementation.

Article 2.0.3 Safety signs, tools, instruments, electrical facilities and various equipment used in high-altitude operations must be inspected before construction to confirm that they are in good condition before they can be put into use.

Article 2.0.4 Climbing and suspended high-altitude workers and personnel who set up safety facilities for high-altitude operations must undergo professional technical training and pass professional examinations, hold a certificate to work, and must undergo regular physical examinations examine.

Article 2.0.5 During construction, when defects and hidden dangers are found in safety technical facilities for high-altitude operations, they must be resolved promptly; when personal safety is endangered, operations must be stopped.

Article 2.0.6 All objects that may fall in the construction workplace should be removed or fixed first.

Materials used in high-altitude operations should be stacked smoothly and not hinder passage, loading and unloading. Tools should be placed in the tool bag; walkways, passage boards and climbing equipment during operation should be cleaned at all times; disassembled objects and remaining materials and waste materials should be cleaned and transported away in time, and should not be randomly littered or discarded downwards. Throwing of passing objects is prohibited.

Article 2.0.7 When working at heights in rainy or snowy days, reliable anti-skid, cold-proof and anti-freeze measures must be taken. All water, ice, frost and snow should be removed promptly.

For high-rise buildings where high-altitude operations are carried out, lightning protection facilities should be installed in advance. In the event of severe weather such as strong winds below Level 6, dense fog, etc., open-air climbing and suspended operations at high altitudes are not allowed. After snowstorms and typhoons, safety facilities for working at heights should be inspected one by one. If any looseness, deformation, damage or falling off are found, they should be repaired and improved immediately.

Article 2.0.8 When the safety protection facilities are temporarily dismantled or changed due to the necessity of the operation, the consent of the person in charge of the construction must be obtained, and corresponding reliable measures must be taken, and the operation should be restored immediately.

Article 2.0.9 When erecting and dismantling the protective shed, a warning area should be set up and a dedicated person should be assigned to monitor it. It is strictly prohibited to dismantle the top and bottom at the same time.

Article 2.0.10 For the main stress-bearing members of safety facilities for high-altitude operations, the mechanical calculation shall be based on the general structural mechanics formula, and the strength and deflection calculation shall be based on the current relevant specifications. However, the steel bending members The strength calculation does not consider plastic effects, and the structure should comply with the requirements of the current corresponding specifications.

Chapter 3 Safety Protection for Edge and Opening Operations

Section 1 Edge Operations

Article 3.1.1 For High Edge Positions During the operation, protective measures must be set up and comply with the following regulations:

1. Around the foundation pit, around balconies, material tables and canopies that have not yet installed railings or railings, as well as around awnings and overhangs, no external Protective railings must be installed around scaffolding roofs and floors, as well as around water tanks and water towers.

2. A safety net must be erected around the perimeter of the second floor where the first floor wall height exceeds 3.2m, and the perimeter of the floor where the height without external scaffolding exceeds 3.2m.

3. Temporary guardrails must be installed at stairwells and ladder sections in layered construction. Formal protective railings should be installed at top stairwells as the structure progresses.

4. Protective railings must be installed on both sides of the derrick, construction elevator, scaffolding, etc., and the passage to the building. A safety protective shed should be installed on the upper part of the ground passage. The middle of the double-cage derrick passage should be separated and closed.

5. For various vertical transportation and material receiving platforms, in addition to protective railings on both sides, safety doors or movable protective railings should also be installed at the platform entrance.

Article 3.1.2 The specifications and connection requirements of edge protection railings shall comply with the following provisions:

1. The effective diameter of the small head of the moso bamboo crossbar shall not be less than 70mm, the diameter of the small head of the railing post should not be less than 80mm, and it must be tied with galvanized steel wire no less than No. 16, with no less than 3 turns and no slippage.

2. The diameter of the upper rod tip of the log crossbar should not be less than 70mm, the diameter of the lower rod should not be less than 60mm, and the diameter of the railing post should not be less than 75mm. It must be nailed with round nails of corresponding length, or tied with galvanized steel wire no less than No. 12, and the surface must be smooth, stable and unshakable.

3. The diameter of the upper rod of the steel crossbar should not be less than 16mm, and the diameter of the lower rod should not be less than 14mm. The diameter of steel pipe crossbars and railing posts should not be less than 18mm, and they should be fixed with welded or galvanized steel wire binding holes.

4. Steel pipe railings and railings are made of φ48×(2.75~3.5) mm pipes and fixed with fasteners or electric welding.

5. When using other steel materials such as angle steel as protective railing members, specifications of comparable strength should be used and fixed by electric welding.

Article 3.1.3 When erecting edge protective railings, the following requirements must be met:

1. The protective railings should be composed of upper and lower horizontal bars and railing posts. , the height of the upper pole from the ground is 1.0~1.2m, and the height of the lower pole from the ground is 0.5~0.6m. For levels with a slope greater than 1:2.2, the protective railings should be 1.5m high and a safety net should be hung. In addition to design calculations, when the length of the crossbar is greater than 2m, railings must be added.

2. The fixing of railing posts should meet the following requirements:

1. When fixing around the foundation pit, steel pipes can be used and driven into the ground to a depth of 50~70cm. The distance between the steel pipe and the edge should not be less than 50cm. When sheet piles are used around the foundation pit, steel pipes can be driven outside the sheet piles.

2． When fixed on concrete floors, roofs or walls, embedded parts can be welded to steel pipes or steel bars. When using bamboo or wooden railings, you can weld 30cm long ∟50×5 angle steel on the embedded parts, drill a hole on the top and bottom of it, and then use 10mm bolts to fasten it to the bamboo or wooden poles.

3． When fixing on masonry such as bricks or blocks, 80×6 bent flat steel with appropriate specifications can be built in advance as concrete blocks with embedded iron, and then fixed using the above method.

3. The overall structure of the fixation of the railing posts and their connection with the horizontal correlation should be such that the protective railings can withstand an external force of 1000N in any direction at any point on the upper pole. When the railing is located at a location where there is a possibility of crowding, vehicle impact or object collision, the cross-bar section should be enlarged or the column spacing should be enlarged.

4. The protective railing must be closed with a safety net from top to bottom, or a tightly fixed foot-blocking board with a height of not less than 18cm or a foot-blocking fence of 40cm must be set under the railing. If there are holes on the toe boards and toe rails, they should not be larger than 25mm. The gap between the bottom edge of the board and the fence should not be greater than 10mm.

The railings on both sides of the material receiving platform must be hung with safety nets or bamboo fences from top to bottom.

5. When the outside of the edge faces the street, in addition to protective railings, the open facade must be fully enclosed with a full safety net or other reliable measures.

Article 3.1.4 The mechanical calculation and structural type of edge protection railings are shown in Appendix 2.

Section 2: Opening Operations

Article 3.2.1: Performing opening operations and other situations that are caused by engineering and process requirements that may cause people and objects to fall or endanger personal life. When working at heights in other safe openings, protective facilities must be installed in accordance with the following regulations:

1. The openings between boards and walls must be equipped with solid covers, protective railings, safety nets or other fall prevention devices. Protective facilities.

2. Protective railings or fixed gates must be installed at the entrance of the elevator shaft; a safety net should be installed every two floors and at most 10m apart in the elevator shaft.

3. The upper openings of pile holes such as steel pipe piles and bored piles, the upper openings of cup-shaped and strip-shaped foundations, unfilled trenches, as well as manholes, skylights, floor doors, etc., are all A stable cover should be installed to protect the opening.

4. In addition to protective facilities and safety signs, red light warning lights should also be set up at night at various openings and pits near passages at the construction site.

Article 3.2.2 When taking measures such as installing protective railings, adding covers, hanging safety nets and installing gates according to specific circumstances, the opening must meet the following requirements:

1. Openings on floors, roofs, platforms, etc. whose short side dimension is less than 25cm but greater than 2.5cm must be covered with solid cover plates. The cover should be prevented from moving.

2. Bamboo, wood, etc. can be used as cover boards to cover the openings with a side length of 25~50cm in the floor surface, etc., the openings when installing prefabricated components, and the openings temporarily formed by missing parts. The cover must be able to maintain a balanced position around it and have measures to fix its position.

3. The opening with a side length of 50~150cm must be equipped with a grid made of steel pipes fastened with fasteners, and covered with bamboo fences or scaffolding boards. The protective net can also be formed by steel bars that penetrate the concrete slab, and the spacing between the steel grids should not be greater than 20cm.

4. For holes with a side length of more than 150cm, protective railings should be set up around them, and a safety net should be stretched under the hole.

5. The openings for garbage shafts and flues should be eliminated as the floors are laid or installed, or the openings should be reserved for protection. During the construction of pipe wells, in addition to handling the above, obvious signs should also be added. If there is temporary demolition, it must be approved by the person in charge of construction, and protective facilities must be restored after the work is completed.

6. For openings, deep trenches, pipe pits and troughs located next to the vehicle driving lane, the cover plates should be able to withstand a load of no less than twice the effective bearing capacity of the local rated truck rear wheels.

7. For vertical openings in walls, etc., all openings that are floor-to-ceiling should be equipped with switch-type, tool-type or fixed protective doors. The spacing between the door grids should not be greater than 15cm. It can also be Use protective railings with foot guards (fences) underneath.

8. From the lower edge to the floor or window sill and other vertical openings whose bottom surface is less than 80cm, if the side drop is greater than 2m, a 1.2m high temporary guardrail should be added.

9. Other vertical holes and openings that pose a risk of falling to nearby people and objects should be covered or protected, and measures should be taken to fix their positions.

Article 3.2.3 The rods and erection of the opening protective railings shall comply with the provisions of Articles 3.1.2 and 3.1.3 of this specification. The mechanical calculation of the protective railings is shown in Appendix 2(1), and the structural type of the protective facilities is shown in Appendix 3.

Chapter 4 Safety Protection for Climbing and Suspended Operations

Section 1 Climbing Operations

Article 4.1.1 should be determined in the construction organization design Aerial and climbing facilities for on-site construction. On-site climbing should use climbing facilities on the building structure or scaffolding, or manned vertical transportation equipment can be used. Ladders or other climbing facilities can be used when performing climbing operations.

Article 4.1.2 The straight ladders and other climbing devices required for hoisting components such as columns, beams and driving beams shall be specified in the construction drawings or instructions of the components.

Article 4.1.3 Climbing equipment must be solid and reliable in structure. The load of the pedal for people to get up and down should not be greater than 1100N. When there are special operations on the ladder surface and the weight exceeds the above load, it should be checked according to the actual situation.

Article 4.1.4 The quality of mobile ladders shall be inspected in accordance with current national standards.

Article 4.1.5 The bottom of the ladder feet should be solid and should not be used elevated. The upper end of the ladder should be secured. The appropriate working angle of the vertical ladder is 75°±5°, the appropriate distance between the upper and lower pedals is 30cm, and there must be no missing gears.

Article 4.1.6 If the ladder needs to be extended for use, reliable connection measures must be provided, and the joints must not exceed one. The strength of the connected ladder beams should not be lower than that of a single ladder beam.

Article 4.1.7 When using a folding ladder, the upper angle should be 35°~45°, the hinge must be firm, and there should be reliable tensioning measures.

Article 4.1.8 Fixed straight ladders shall be made of metal materials. The width of the ladder should not be greater than 50cm, the support should be angle steel not less than ∟70×6, and the embedding and welding must be firm. The rung at the top of the ladder should be flush with the top surface of the ladder, and a 1 to 1.5m high handrail should be added.

When using a straight ladder for climbing operations, the climbing height should be 5m. When it exceeds 2m, a protective cage should be installed. When it exceeds 8m, a ladder platform must be installed.

Article 4.1.9 Operators should go up and down through the prescribed passages, and are not allowed to climb in non-prescribed passages such as between balconies, nor to use crane booms and other construction equipment to climb.

When going up or down a ladder, you must face the ladder and do not hold objects in your hands.

Article 4.1.10 When installing steel columns for climbing, steel hanging ladders or ladders set on steel columns should be used. The structure of the hanging ladder is shown in Appendix 4, Figure 4.1.

Ladders or operating platforms should be used to connect steel columns. Height of operating platform crossbar. When there is no windproof requirement for electric welding, its height should not be less than 1m. When there is a requirement for electric welding windproof, its height should not be less than 1.8m. See Appendix 4, Figure 4.2.

Article 4.1.11 When installing steel beams at height, ladders or steel pipe scaffolding should be set up at both ends depending on the height of the steel beam. For the structure, see Appendix 4, Figure 4.3.

When walking is required on the beam surface, the temporary guardrail crossbar on one side can be made of steel cables. When handrail ropes are used instead, the natural sag of the ropes should not be greater than 1/20 and should be controlled within Within 10cm, see Appendix 4, Figure 4.4. l is the length of the rope.

Article 4.1.12 The installation of steel shelves should comply with the following regulations:

1. When operating the upper and lower strings of the shelf, the triangular roof trusses should be at the ridge , Ladder-shaped shelves should be set at both ends for up and down ladders when climbing. The material can be moso bamboo or logs, the step spacing should not be greater than 40cm, and the moso bamboo tip diameter should not be less than 70mm.

2. Before hoisting the roof truss, protective railings should be installed on the upper chord.

3. Before hoisting the roof truss, a safety net should be hung on the bottom string in advance; after the hoisting is completed, the safety net should be laid and fixed.

Section 2 Suspended Operations

Article 4.2.1 Suspended operations should have a firm footing, and must be equipped with protective fences, railings or other equipment depending on the specific circumstances. Safety features.

Article 4.2.2 Riggings, scaffolding boards, hanging baskets, hanging cages, platforms and other equipment used for suspended operations must undergo technical appraisal or inspection before they can be used.

Article 4.2.3 Suspension operations during component hoisting and pipeline installation must comply with the following regulations:

1. When hoisting steel structures, components should be assembled on the ground as much as possible , and high-altitude safety facilities for temporary fixing, electric welding, high-strength bolt connection and other processes should be erected, and the components should be hoisted into place at the same time. Safety measures during disassembly should also be considered and implemented. Before hoisting large components such as prestressed reinforced concrete shelves and trusses at high altitude, safety facilities required for suspended operations should also be erected.

2. When installing large formwork in the air, hoisting the first prefabricated component, or hoisting individual large and medium-sized prefabricated components, you must stand on the operating platform. It is strictly prohibited to stand or walk on large formwork and prefabricated components during hoisting, as well as roof panels such as asbestos cement boards.

3. When installing pipelines, there must be a completed structure or operating platform as a foothold. It is strictly prohibited to stand or walk on the pipeline being installed.

Article 4.2.4 Suspension operations during formwork support and disassembly must comply with the following regulations:

1. Formwork support should be carried out in accordance with the prescribed operating procedures. The formwork is not fixed. Do not proceed to the next process before. It is strictly prohibited to climb up and down on the connectors and supports, and it is strictly prohibited to install or remove the formwork on the same vertical surface above and below. For formwork with complex structure, installation and disassembly should be carried out strictly in accordance with the measures of construction organization design.

2. When supporting column formwork with a height of more than 3m, diagonal braces should be installed around it and an operating platform should be set up. If the height is less than 3m, a horse stool can be used for operation.

3. When erecting cantilevered formwork, there should be a solid footing. When erecting formwork for airborne structures, brackets or scaffolding should be erected. If there are reserved holes in the formwork, they should be covered after installation. The edges or openings formed after the formwork is removed from the concrete slab shall be protected in accordance with the relevant sections of this specification.

For high-altitude operations such as formwork disassembly, climbing equipment or brackets should be installed.

Article 4.2.5 The following regulations must be followed when tying steel bars in the air:

1. Scaffolding and horse trails must be erected when tying steel bars and installing steel frame frames.

2. When tying steel bars such as ring beams, cantilever beams, overhangs, exterior walls and side columns, an operating platform and safety net should be set up.

The binding of steel bars of suspended girders must be performed on a support or operating platform covered with scaffolding boards.

3. When tying columns and wall steel bars, you are not allowed to stand on the steel frame or climb up or down the frame. Column reinforcement within 3m. It can be tied on the ground or floor and erected as a whole. To tie column steel bars above 3m, an operating platform must be set up.

Article 4.2.6 Suspended operations during concrete pouring must comply with the following regulations:

1. Pouring frames, lintels, awnings and small platforms more than 2m above the ground When working, an operating platform should be set up, and it is not allowed to operate directly on the formwork or supports.

2. The pouring of the arch structure should be carried out symmetrically from the arch feet on both sides. When pouring the silo, the lower opening should be closed first and scaffolding should be erected to prevent people from falling.

3. Under special circumstances, if there are no reliable safety facilities, you must fasten your seat belt and buckle the safety hook, or set up a safety net.

Article 4.2.7 When performing suspended operations of prestressed tensioning, the following regulations must be observed:

1. When performing prestressed tensioning, standing operators should be provided and a strong and reliable scaffolding or operating platform for setting up tensioning equipment.

When tensioning in rainy days, a rainproof shed should also be erected.

2. The prestressed tensioning area is marked with obvious safety signs and non-operators are prohibited from entering. Baffles must be provided at both ends of the tension steel bars. The baffle should be 1.5~2m away from the end of the tensioned steel bar, and should be 0.5m higher than the uppermost group of tensioned steel bars. Its width should be no less than 1m from the outside sides of the tensioned steel bars.

3. Tunnel grouting should be carried out in accordance with the relevant regulations of prestressed tensioning safety facilities.

Article 4.2.8 When operating doors and windows in the air, the following regulations must be observed:

1. When installing doors, windows, painting and installing glass, operators are strictly prohibited from standing on Operate on the rafters and balcony railings. Doors and windows are temporarily fixed, the sealing material has not reached the strength, and when welding, it is strictly prohibited to climb the door or window by hand.

2. When installing doors and windows on high exterior walls without external scaffolding, safety nets should be hung. When there is no safety net, the operator should fasten the safety belt, and its safety hook should be hung on a reliable object above the operator.

3. When performing various window operations, the operator's center of gravity should be indoors and they are not allowed to stand on the window sill. If necessary, they should fasten their seat belts for operation.

Chapter 5 Safety Protection of Operating Platforms and Cross-Working Operations

Section 1 Operating Platforms

Article 5.1.1 Mobile operating platforms must Comply with the following regulations:

1. The operating platform should be designed by professional technicians in accordance with the current corresponding specifications, and the calculation sheets and drawings should be incorporated into the construction organization design.

2. The area of ??the operating platform should not exceed 10m2, and the height should not exceed 5m. Stability checks should also be carried out and measures should be taken to reduce the slenderness ratio of the columns.

3. For a mobile operating platform equipped with wheels, the joint between the wheels and the platform should be firm and reliable, and the bottom of the column should not be more than 80mm from the ground.

4. The operating platform can be connected with φ (48~51) × 3.5mm steel pipes with fasteners. It can also be assembled with gantry-type or socket-type steel pipe scaffolding components according to product usage requirements. The distance between the secondary beams of the platform should not be less than 40cm; the countertop should be covered with 3cm thick wooden boards or bamboo fences.

5. Protective railings must be installed around the operating platform in accordance with the requirements for edge operations, and climbing escalators should be arranged.

Article 5.1.2 The cantilevered steel platform must comply with the following regulations:

1. The cantilevered steel platform should be designed according to the current corresponding specifications, and its structure The structure should be able to prevent left and right shaking, and calculations and drawings should be incorporated into the construction organization design.

2. The supporting points and upper tie points of the cantilevered steel platform must be located on the building and shall not be set on construction equipment such as scaffolding.

3. The diagonal tie rod or steel wire rope should be structurally provided with two front and rear lanes on each side, and each of the two lanes should be calculated as a single lane.

4. Four verified lifting rings should be set up. Snap rings should be used when lifting the platform, and the hook should not be directly hooked on the lifting ring. The lifting rings shall be made of Class A No. 3 boiling steel.

5. When installing the steel platform, the steel wire rope should be hung firmly with a special hook. When other methods are used, the number of clamps on the head should not be less than 3. The steel ropes surrounding the sharp corners of the building should be lined with soft cushions, and the outer opening of the steel platform should be slightly higher than the inner opening.

6. Fixed protective railings must be installed on the left and right sides of the steel platform.

7. When hoisting the steel platform, the support points of the beam need to be welded and fixed, the wire ropes have been connected, and the adjustment has been completed. After inspection and acceptance, the lifting hook can be loosened and operated up and down.

8. When the steel platform is in use, a dedicated person should be inspected. If the steel wire rope is found to be rusty and damaged, it should be replaced in time, and the welding seam desoldering should be repaired in time.

Article 5.1.3 The allowable load value should be clearly marked on the operating platform. The total weight of personnel and materials on the operating platform is strictly prohibited from exceeding the design allowable load. Special personnel should be assigned to supervise.

Article 5.1.4 The mechanical calculation and structural type of the operating platform are shown in Appendix 5 (1) and (2).

Section 2 Crossing Operations

Article 5.2.1 When various types of work such as formwork, painting, and wall building are performing upper and lower three-dimensional crossing operations, they must not operate in the same vertical direction. . The location of the lower level work must be outside the radius of the possible fall range determined by the height of the upper level. When the above conditions are not met, a safety protection layer should be installed.

Article 5.2.2 When dismantling steel formwork, scaffolding, etc., no other operators are allowed below.

Article 5.2.3 After the steel formwork components are removed, the temporary storage location shall not be less than 1m from the edge of the floor, and the stacking height shall not exceed 1m. It is strictly prohibited to stack any dismantled objects at floor edges, passageways, scaffolding edges, etc.

Article 5.2.4 Starting from the second floor of structural construction, safety protection sheds should be erected at all access points for personnel entry and exit (including derricks and entrances and exits of construction elevators). Cross-cutting operations on levels exceeding 24m in height should be provided with double-layer protection.

Article 5.2.5 For passages where objects may fall due to construction above or are within the swing range of the crane handle, a double layer with a top that can prevent penetration must be erected within the affected range. Protective profile.

See Appendix 6 for the structural type of cross working channel protection in Article 5.2.6.

Chapter 6 Acceptance of Safety Protection Facilities for High-Height Operations

Article 6.0.1 Before carrying out construction work at heights, safety protection facilities shall be inspected and inspected item by item. acceptance. Only after passing the inspection can work at heights be carried out. Acceptance can also be carried out in layers, or in stages.

Article 6.0.2 Safety protection facilities shall be inspected and accepted by the person in charge of the project of the unit, and relevant personnel shall be organized to participate.

Article 6.0.3 The acceptance of safety protection facilities shall have the following information:

1. Construction organization design and relevant verification data;

2 , Safety protection facility acceptance record;

3. Safety protection facility change record and visa.

Article 6.0.4 The acceptance of safety protection facilities mainly includes the following contents:

1. The installation status of all technical measures such as edges and openings;

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2. Specifications and materials of accessories, materials and tools used in technical measures;

3. Node structure of technical measures and their fixation with the building;

4. The tightness of fasteners and connectors;

5. Verification of the performance and quality of supplies and equipment for safety protection facilities.

Article 6.0.5 The acceptance of safety protection facilities shall be inspected item by category and acceptance records shall be made. Anyone who does not meet the requirements must be revised and qualified again for inspection. Spot checks should also be carried out regularly during the construction period.

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