Construction hanging basket (scientific name: hanging basket for work at height), which is active in almost every construction site, can be said to shine in front of people
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Behind the brilliance, there is a sad history
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Up to now, it is still unclear whether its positioning is special equipment, which brings many variables to the management of construction hanging baskets The first part, the relevant provisions Jgj202-2010 “technical code for safety of construction tool scaffold and hanging basket” first brings you familiar with the management standard of construction hanging basket Jgj202-2010 technical code for safety of construction tool scaffold and hanging basket p35 ~ P40, P60 ~ p61 JB / t11699-2013 “technical specification for installation, disassembly and use of hanging basket for work at height”, in which the latter is a recommended standard, so relatively speaking, the former is used more in site management
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Jgj202-2010, as the main standard and basis of the current hanging basket management, in fact, there are not many strong rules
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To a certain extent, the flexibility of the hanging basket management is relatively large
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5.2.11 is also a strong article
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I think this article is equivalent to vernacular, or common sense
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Anyone who knows Newton should know the necessity of this article! Perhaps it is because of the importance of the content described in this article, rather than the so-called common sense, that it is taken as the standard of compulsory provisions
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5.4.7 read through the whole code, it should be said that this article is the most intriguing, and it is also the most controversial mandatory provision at present
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Let’s take a look at the interpretation of the following provisions (below), which can be translated in Vernacular: because the parapet or the eaves of the building can not bear the load of the hanging basket, it can not be used as the support point of the hanging mechanism; Another way of saying is: if the parapet or building eaves can bear the load of the hanging basket, then it can be used as the support point of the hanging mechanism
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This specification（ Jgj202-2010) was issued on March 31, 2010, that is to say, the preparation time of the code was around 2009
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At that time, there were more parapets in multi-storey and even high-rise masonry structure than now, and the strength of masonry structure was difficult to bear the load of hanging basket suspension mechanism, so it was forbidden to use it as a support point
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It is still a past understanding
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But now it’s 2019, and the parapet of concrete structure has been widely used in multi-storey structures, especially in high-rise buildings
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The reinforced concrete structure is more than enough as the fulcrum of the hanging mechanism of the construction basket
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If we simply let this mandatory norm limit the flexibility of our management indiscriminately, then the norm will be reduced to “eight part essay”! 5.4.10 this article also means “judgment questions that can be done if you don’t look at them”
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However, now that I have come to this point, I would like to discuss something with you
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Maybe I really have little knowledge or poor understanding ability
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I sincerely ask for an answer: the figure below is two pictures cut from the instruction manual of different brands of hanging baskets (zlp630)
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We find that although the weight of the counterweight required by the two is different, But it’s not what we saw on site: the weight of the counterweight in the figure below is 25kg (see the enlarged figure below), the total weight of all 20 counterweights is 500kg, which is not a little different from the 1000kg required in the manual, which is very puzzling..
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20 counterweights! It seems that it has become the only standard for us to check that the counterweight is enough for a certain configuration
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When we enlarge the figure, we can see the key points
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What’s more, the weight of a piece of counterweight is less than 20kg, which is far from the weight required in the manual
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However, these baskets can be accepted and used normally
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Moreover, the weight of a piece of counterweight is less than 20kg, It’s safe to use! In other words, if 1000kg, i.e
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1t counterweight is configured according to the requirements of the manual, can the floor of about 10cm meet the load-bearing requirements? Interested partners can check it by themselves..
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5.4.13, casters? What the hell? I’ve never seen Xiaobian before! Hope friends can contact Xiaobian to send related pictures, thank you in advance! JB/T As for JB / t11699-2013 technical specification for installation, disassembly and use of hanging baskets for work at height, because there are not many daily references, in response to today’s “different” theme of pictures and texts, I will choose a few articles that change our habitual thinking and conventional understanding to share and discuss with you
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4.9, 6.2.3
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For the users, that is, the construction units and the units where most readers are employed, the users of hanging baskets are required to work with certificates! That is to say, those who use the hanging basket for external wall painting, thermal insulation, coating and other operations should work with certificates! But what does the operator’s license look like? At present, the relatively good practice in the market is to carry out simple training for their own projects, and use self-made certificates inside the projects, which is just a small card
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Is this kind of certificate the so-called “legal and valid certificate”? Can be legal, because the market want to test more legal certificate, really not easy! Not unwilling to test, but no place to test! So the competent authorities also acquiesced in this practice..
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It can also be illegal, after all, this kind of certificate is not recognized by “relevant departments”! Let’s look at other people’s practices
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Are some local competent departments ashamed? The most conventional operation certificate training for crane workers and external frame workers is still a mess, not to mention the following certificates..
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4.11
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Work responsibilities of general construction contractors..
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Review the qualification certificates of special operation personnel of users
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For the use of the hanging basket, the special operation certificate can only be understood as the legal and valid certificate of the hanging basket operator in article 4.9
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5.2.12 this specification makes me have a new understanding of the site
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Just look at the specifications
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If there is a problem with the hanging point of the working wire rope, the safety wire rope will not suffer
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How can we see that
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Expand the description of cantilever unloading platform in jgj80-2016 “technical code for safety of construction work at height”, and the principle is the same
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However, in the market, there are some manufacturers, leasing companies, or users who are so bold and reckless that the ignorant are fearless! If the design is not up to standard, there is no chance for you to hang it separately
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Of course, most of the units still have a sense of awe
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In order to meet the requirements of the specification (only for the above provisions), it can be like this..
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This..
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Looking horizontally..
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Or this..
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Or looking horizontally The second part is the unconventional erection of hanging basket support frame Before starting this chapter, let’s take a look at the standard of the conventional erection of the hanging basket, as shown in the figure below: the premise of the conventional erection is: there is a large enough platform, the height of the parapet is not high, the width of the cornice is within a certain range, etc., but the site construction conditions, working conditions and building structures are various, so it is difficult to have the above conditions at the same time, At this time, the flexible use of the unconventional method of hanging basket support is particularly useful..
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For the convenience of graphic editing, and for the readers to see the picture more clearly, the following uses the way of directly stacking pictures to explain.
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