☞ lack of logical thinking on the safety of this structure, you can imagine that once the load-bearing frame body has problems, it will inevitably have problems together with the outer frame, so that there is no access for personnel evacuation and rescue
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From the bottom to the top, the beam bottom cross bar and the outer frame safety channel share a row of cross bars to form a bearing body
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It is not allowed to fix the formwork support, cable wind rope, pumping concrete and mortar delivery pipe on the frame; it is strictly forbidden to hang the lifting equipment, and it is strictly forbidden to dismantle or move the safety protection facilities on the frame
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Why is there such illegal scaffold erection? ☞ the person in charge of the construction, technology and safety of scaffold erection is not familiar with the technical specifications of scaffold
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Each original article is my many years of work experience and insights, as well as my practical work thinking and skills, for reference only, share with you! (some of the pictures in this article are from the Internet and are only used for training
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Clause 9.0.5 is a mandatory provision to prevent the scaffold from affecting the safe construction due to overload
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Annual safety meeting notice: some technical leaders even “bearing frame can not be connected with the scaffold” such “strong” do not know
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☞ the person in charge of the construction site does not understand the regulation that “the outer frame cannot be connected with the bearing frame”
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Therefore, 9.0.5 of “technical code for safety of steel tubular scaffold with couplers in building construction” jgj130-2011, page 58 stipulates that the construction load on the working layer shall meet the design requirements and shall not be overloaded
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As long as we attach the same importance to giving birth to children, it is possible and necessary to carry out the compliance inspection and verification of the construction scheme (implementation stage) for each important construction project in accordance with the specification requirements, correct the deviation in time, and avoid the extremely serious safety and quality accidents
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This kind of harm is more serious, there is no set up outside the frame, directly set up the channel on the bearing frame
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From top to bottom, the cross bar of the outer frame is connected with the bearing frame
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First of all, what will happen if we violate this compulsory regulation? (example 1) the outer frame of the plant structure is connected with the bearing frame, the bearing frame collapses, and the outer frame collapses with it, causing casualties
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It is necessary to strengthen the training and the compliance inspection of the actual measurement test certificate of the construction scheme (implementation stage) to ensure the 100% implementation of the major construction scheme
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From the perspective of the proportion of collapse accidents of formwork support system, the accidents have been reduced, but the violations are far from being eliminated
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☞} it is easier for operators to connect the outer frame and the bearing frame together with a long cross bar
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☞ the person in charge of technical support, production implementation and safety supervision shall inspect the compliance on site and discuss measures to eliminate hidden dangers
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This kind of illegal operation is one of the main causes of scaffold collapse accidents in construction engineering, especially the important cause of casualties caused by scaffold collapse
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(example 2) the outer frame of the building structure is connected with the bearing frame, the bearing frame collapses, and the outer frame collapses with it, causing casualties
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☞ support (formwork) frame: it is used to support steel structure installation or pouring concrete (formwork) components and scaffold materials
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The cross bar of the outer frame of the scaffold is independent and not connected with the inner bearing scaffold
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☞ scaffold refers to the temporary structural frame erected for the construction of personnel passage, loading, stacking and construction operation, which can exist independently and is also a structure cooperating with the construction of auxiliary bearing frame
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Even if there is no strong regulation, the outer frame should not be connected with the bearing frame from the bottom line of ensuring safe construction
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☞ it is easy to set up the personnel diagram
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This is because many people who are engaged in engineering do not know or ignore the definition and regulation of scaffold erection specification
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The picture before the scaffold accident of (example 3)
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For details, please refer to “the only way to curb major accidents – construction scheme (Implementation) compliance inspection and verification” compiled and issued in March 2019
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It is the most convenient way to eliminate the hidden danger of the accident that the conformity inspection mechanism of the actual measurement experiment certificate of the construction scheme
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If the cross bar is set up separately, it needs to be set up separately
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Scaffold (outer frame) is a structure including bearing frame (formwork support frame) and outer scaffold (mainly safety channel)
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Our acceptance work should start from the first pole, the first cross bar, and the first support bar! Take a good step, and then build up, you won’t miss! Correct practice: the outer frame is independent, and the length of the cross bar is generally 1.5 meters, which can ensure the safe passage of at least 1 meter wide
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Examples of supporting the bearing frame on the outer frame or connecting the cross bar of the outer frame to the bearing frame in violation of regulations
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According to the Ministry of housing and urban rural development’s notice on production safety accidents of housing and municipal engineering in 2016, a total of 27 major accidents occurred in the whole year, including 8 formwork support system collapse accidents and 30 deaths, accounting for 29.63% and 31.91% of the total number of major accidents respectively; the Ministry of housing and urban rural rural development’s notice in 2019, formwork support system collapse accidents accounted for 4.35%
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☞} therefore, it is necessary to check and verify the compliance of the erection scheme (implementation phase) of the measured actual measurement test certificate at the erection site, which is correct when the first cross bar is laid
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The cross bar is staggered between the 6m and 4m frame pipes to save one process
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Once the pouring beam collapses, it will collapse together with the outer frame safety channel
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If there is any problem, please delete them).
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As the “technical support system”, the technical director organizes the inspection and verification of the actual measurement of the scaffold erection scheme to ensure that the erection scheme is 100% implemented
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From the top down, the outer frame is not connected with the load-bearing scaffold, which is in line with the standard
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(example 3) the outer frame of the plant is connected with the bearing frame, the bearing frame collapses, and the outer frame collapses with it, causing casualties
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What kind of structure is the standard external scaffold and bearing frame? How do you do it? It shall be clearly specified in the scheme that the external scaffold shall not be connected with the bearing frame
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If you want to learn more about the safety management methods and safety operation skills that have been proved to be compliant and applicable by practice, please listen to my “yiyiyilai” — welcome to pay attention to “yiyiyiyilai”
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After each pouring layer, the outer frame can be connected and reinforced with the poured column beam to ensure the stability of the outer frame
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In fact, in the implementation stage of the construction scheme, the compliance inspection and verification mechanism of the actual test certificate is the same as our process of getting married and having children
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☞ the design parameters, service load, structural requirements and actual working conditions of scaffold (outer frame) and support frame are different
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If the support rod of the bearing scaffold is connected to the outer scaffold, or the outer scaffold is connected to the bearing frame, once the bearing frame is unstable and overturned under the concrete pouring load, it will collapse together with the outer scaffold, which will cause major personal injury accidents
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The outer frame and the load-bearing frame share the cross bar to form a load-bearing body
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Therefore, it is necessary to check and verify the compliance of the erection scheme (implementation phase) of the measured actual measurement test certificate at the erection site
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Outer scaffold and bearing scaffold are two parallel systems, collectively referred to as “scaffold, a relatively independent system which is parallel but not parallel”
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