In addition to the problem of building safety, scaffolding due to the wear and tear of the material, some hidden safety hazards are also the introduction of accidents, the following will give you a detailed explanation of the common safety hazards in scaffolding construction, it is necessary to collect!

Safety hazards (1) The
quality of the materials used in the construction of the frame does not meet the requirements of the specification

1.1 The quality of the steel pipe model is not standardized, and there are phenomena such as rust, deformation, and perforation

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

8.1.1 The inspection of new steel pipes shall comply with the following requirements:

1. There should be a product quality certificate;

2. There should be a quality inspection report, and the inspection method of steel pipe material should comply with the relevant provisions of the current national standard "Tensile Test Method for Metal Materials at Room Temperature" GB/T228, and its quality should comply with the provisions of Article 3.1.1 of this specification;

3. The surface of the steel pipe should be straight and smooth, and there should be no cracks, scars, delamination, dislocation, hard bending, burrs, indentations and deep markings;

4. The deviation of the outer diameter, wall thickness, end face, etc. of the steel pipe shall be in accordance with the provisions of Table 8.1.8 of this specification;

5 The steel pipe should be coated with anti-rust paint.

【Strong strip】9.0.4 It is strictly forbidden to punch holes in the steel pipe.

1.2 The quality of the fastener does not meet the requirements, and the bolt tightening torque of the fastener does not reach 65N•m, which is destroyed

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

8.1.3 The acceptance of fasteners shall comply with the following provisions: 1. Fasteners shall have a production license, a test report of a statutory testing unit and a product quality certificate. When there is doubt about the quality of fasteners, sampling and testing should be carried out in accordance with the provisions of the current national standard "Steel Pipe Scaffolding Fasteners" GB15831. 2. Both new and old fasteners should be treated with anti-rust. 3. The technical requirements of fasteners shall comply with the relevant provisions of the current national standard "Steel Pipe Scaffolding Fasteners" GB15831.

8.1.4 Fasteners entering the construction site should check the product certificate, and should be sampled for retest, and the technical performance should meet the provisions of the current national standard "Steel Pipe Scaffolding Fasteners" GB15831. Fasteners should be selected one by one before use, and it is strictly forbidden to use cracks, deformations, and slippery bolts.

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

3.2.2 The fastener shall not be damaged when the tightening torque of the bolt reaches 65N·m.

7.3.11 Article 2 The tightening torque of the bolt shall not be less than 40N·m and shall not be greater than 65N·m.

8.2.5 The tightening torque of fastener bolts after installation shall be checked by a torque wrench, and the sampling method shall be carried out according to the principle of random distribution. The number of sampling inspections and the quality judgment standard shall be determined in accordance with the provisions of Table 8.2.5. If it is unqualified, it should be re-tightened to qualification.

1.3 Use safety nets that do not meet the current standards, and the quality and impact strength do not meet the requirements

"Technical Code for Safety of Work at Height in Building Construction" JGJ80-2016

8.1.1 The selection of construction safety nets shall comply with the following provisions:

1. The material, specification, physical properties, fire resistance and flame retardancy of the safety net shall meet the provisions of the current national standard "Safety Net" GB5725;

2. The density of the dense mesh safety vertical net should be 10cmX10cm, and the area should be greater than or equal to 2000 mesh.

Safety hazards (2) The
structure of the frame does not meet the requirements of the specification
2.1 The bearing capacity of the foundation does not meet the requirements

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

5.5.3 For the scaffolding erected on the floor and other building structures, the bearing capacity of the building structure supporting the frame should be checked, and reliable reinforcement measures should be taken when the bearing capacity requirements cannot be met.

7.1.4 The debris of the erection site shall be removed, the erection site shall be leveled, and the drainage shall be smooth.

7.2.1 The construction of scaffolding foundation and foundation shall be carried out according to the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Building Foundation Engineering" GB50202 the load, erection height, and soil quality of the erection site.

2.2 The erection structure of the frame is wrong (the spacing between the vertical rods is too large, the vertical rods and the crossbars do not intersect, and the position of the vertical and horizontal rods is wrong)

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

6.2.3 A transverse horizontal rod must be set at the main node, which is fastened with a right-angle fastener and is strictly forbidden to be removed.

Chapter 8 Inspection and Acceptance Table 8.2.4 Paragraph 9 Fastener Installation: The distance between the center points of each fastener at the main node is 150mm a≤.

2.2 Frame erection structure error (high and low erection error)

The erection structure of the frame is wrong (the height of the parapet is wrong)

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

6.3.7 The railing at the top of the scaffolding pole should be 1m higher than the upper end of the parapet wall and 1.5m higher than the upper end of the cornice.

2.3 The connection and force of the frame rod do not meet the requirements

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

【Strength】 6.3.5 Single-row, double-row and full-hall scaffolding pole length, except for the top step, the rest of the steps must be connected by butt fasteners.

2.4 The structure of the sweeping rod does not meet the requirements

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

6.3.2 The scaffold must be provided with longitudinal and transverse sweeping rods. The longitudinal sweeping rod should be fixed on the vertical rod not more than 200mm away from the bottom end of the steel pipe by right-angle fasteners. The transverse sweeping rod should be fixed on the vertical rod immediately below the longitudinal sweeping rod with right-angle fasteners.

2.5 The end of the frame is open and there is no reinforcement measure

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

【Strong strip】6.6.5 Transverse diagonal braces must be provided at both ends of the open double-row scaffolding.

Explanation of provisions: 6.6.5 The ends of open scaffolding are weak links. The transverse diagonal braces at both ends of the scaffolding are arranged and connected with the main structure to provide strong overall stiffness to this type of scaffolding. The static simulation test shows that for the slotted scaffold, when there are transverse diagonal braces (zigzags) at both ends and scissor braces on the outside, the bearing capacity of the scaffold can be increased by about 20% compared with the non-set.

Potential safety hazards (3)
The structure of the scissor brace and the door opening of the frame body is wrong
3.1 The overlap of the steel pipe at the intersection of the scissor brace of the frame body is wrong

3.2 The scissors of the frame body cannot be supported on the top or bottom

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

【Strength】 6.6.3 Double-row scaffolding with a height of 24m or more shall be continuously provided with scissor braces on the outer façade; Single-row and double-row scaffolding with a height of less than 24m must be provided with a scissor brace at both ends of the outside, at the corner and at a distance of no more than 15m in the middle, and should be continuously set from bottom to top.

3.3 The discontinuous spacing or position of the scissor supports does not meet the requirements of the specification

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

【Strength】 6.6.3 Double-row scaffolding with a height of 24m or more shall be continuously provided with scissor braces on the outer façade; Single-row and double-row scaffolding with a height of less than 24m must be provided with a scissor brace at both ends of the outside, at the corner and at a distance of no more than 15m in the middle, and should be continuously set from bottom to top.

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

[Strong Regulations] 6.6.3 Double-row scaffolding with a height of 24m and above shall be continuously provided with scissor braces on the outer façade; Single-row and double-row scaffolding with a height of less than 24m must be provided with a scissor brace at both ends of the outside, at the corner and at a distance of no more than 15m in the middle, and should be continuously set from bottom to top.

Potential safety hazards (4) The
setting of the wall pieces of the frame body is not standardized
4.1 The number of wall pieces of the frame body does not meet the requirements of the specification or the wall pieces are not set

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

【Strong bar】9.0.13 During the use of scaffolding, it is strictly forbidden to dismantle the following rods: 1. Longitudinal and transverse horizontal rods at the main node, longitudinal and transverse sweeping rods; 2 wall pieces.

4.2 The frame wall parts were dismantled without authorization due to construction reasons and were not restored

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

【Strong bar】9.0.13 During the use of scaffolding, it is strictly forbidden to dismantle the following rods: 1. Longitudinal and transverse horizontal rods at the main node, longitudinal and transverse sweeping rods; 2 wall pieces.

4.3 The setting of the wall pieces of the frame body does not meet the requirements

Potential safety hazards (5)
The safety protection measures of the frame are not standardized
5.1 The setting of the safety net does not meet the requirements

5.2 The protective measures between the frame and the building are not in place

"Safety Technical Code for Fastener Steel Pipe Scaffolding for Building Construction" JGJ130-2011

7.3.13 Paragraph 1 The scaffold board shall be covered and stable, and the distance from the wall shall not be greater than 150mm;

7.3.6 Paragraph 2 The distance between the end of the horizontal rod against the wall and the decorative surface of the wall of the double-row scaffold shall not be greater than 100mm.

"Construction Safety Inspection Standard" JGJ59-2011

3.3.4 Paragraph 3 Article 2 The scaffolding or safety net shall be used to close the scaffolding body and the building on the working floor.

Safety hazards (6)
The scaffolding board of the frame body is not standardized
6.1 The structure of the scaffold board itself is not standardized

6.2 The scaffold board of the frame is not standardized

6.3 The lap joint of the scaffold board of the frame body is not standardized

Safety hazard 7).
Frame management safety hazards
8.1 The construction waste on the scaffold board of part of the frame body is not cleaned up in time

8.2 There are no fire prevention measures for welding operations on the building at the frame body