中央ビルト工業 List of Products and Services

As a specialist in scaffold manufacturing, Chuo Built Industry, a temporary equipment manufacturer with over 70 years of establishment, publishes a monthly "Scaffold Column" to convey correct knowledge and information about scaffolding to contribute to safety and efficiency at construction sites. We are offering all 33 previously created materials for free! Please use them for reaffirming your knowledge of scaffolding, self-improvement, and in-house training. 【This material is recommended for the following individuals】 ◆ General contractor construction management ◆ Scaffold workers ◆ Scaffold leasing companies 【Column Titles (excerpt)】 ■ What is formwork support? Explaining the differences and types compared to scaffolding ■ What is an interlayer net for scaffolding? Explaining its features and installation standards ■ What is the future and potential of the scaffolding industry? Future prospects based on the current situation ■ What type of scaffolding is used for roofing work? Features and precautions when installing ■ What are the types of scaffolding at construction sites? Explaining the characteristics of external scaffolding, internal scaffolding, and ground scaffolding ■ What documents are needed for scaffold installation notification? Check the process before submission ■ Explaining how to write scaffold drawings in four steps! About scaffold design and how to create drawings ■ What is a circular scaffold? Explaining how to assemble it and precautions *You can view the contents of each material immediately via "PDF Download."

Some people may be considering repairs to their exterior walls but are troubled because they cannot set up scaffolding due to the close proximity of neighboring buildings. One scaffolding method that I would recommend in such cases is the no-scaffolding method. In this article, I will explain the situations in which the no-scaffolding method is used, as well as its advantages and disadvantages. By reading this article, you will be able to consider the no-scaffolding method as an option while being mindful of the impact on your neighbors. *For more details, please download the PDF document.

You may hear the term "long-span construction elevator" at construction sites, but do you know what roles it plays and what installation standards exist? By understanding the installation standards for long-span construction elevators, you can improve not only the work efficiency on site but also safety. In this article, we will explain the differences between long-span construction elevators and construction lifts, as well as the installation standards. By reading this article, you will gain an understanding of the installation rules for long-span construction elevators and aim to enhance work efficiency and safety on site. *For more information, please download the PDF document.*

Do you know what a safety factor is? The safety factor is important for the safe use of temporary equipment (scaffolding materials). In this article, we will explain the safety factor of temporary equipment (scaffolding materials), how to calculate it, and its legal basis. By reading this article, you will be able to understand the safety factor of temporary equipment (scaffolding materials), which will help reduce accidents and disasters when using temporary equipment. *For more details, please download the PDF document.

At construction sites, you may hear the term "negawami," but do you know what it refers to? Negawami is one of the important components for assembling scaffolding, and there are established standards for its installation. In this article, we will provide a detailed explanation of the installation standards and methods for negawami. By reading this article and gaining a thorough understanding of negawami, you can assemble scaffolding with high safety, achieving an accident-free environment on the site. *For more details, please download the PDF document.

When the shape of the outer wall is complex, it is necessary to add scaffold brackets to the scaffolding assembled from the base of the building. There are several types of scaffold brackets, and by using each appropriately, workability and safety can be improved. By reading this article, you will be able to consider the appropriate scaffold brackets. Let's enhance safety on site while keeping costs down for tasks such as reassembling the scaffolding. *For more information, please download the PDF document.*

The wire used for securing scaffolding materials at construction sites is commonly referred to as "ban-sen." Some may want to know the correct way to tighten it and important points to consider when securing it. The use of ban-sen to secure scaffolding boards and other materials plays a crucial role in safeguarding the lives of those working at heights on scaffolding. This article will provide a detailed explanation of how to properly tighten ban-sen for scaffolding. By understanding the appropriate tightening method, we can establish safe scaffolding and prevent accidents at construction sites. *For more information, please download the PDF document.*

One of the surface treatment methods for steel materials is plating. Some may wonder what kind of treatment method plating is and what effects it has. By understanding the effects of plating, you can consider the material of construction materials and reduce costs. This time, we will explain the differences between hot-dip galvanizing and pre-galvanizing, as well as the characteristics of each. By learning about plating in this article, you will be able to select construction materials with consideration for corrosion resistance and cost. *For more information, please download the PDF document.

To prevent accidents at construction sites, it is essential to have scaffolding with high safety standards, which is why many site managers may be concerned about the lifespan of scaffolding. By knowing the lifespan of scaffolding, it is possible to prevent accidents and disasters caused by deterioration. Therefore, this time, we will introduce the lifespan of scaffolding and the necessary knowledge to ensure safety. *For more details, please download the PDF document.*

In construction sites, scaffolding is essential for progressing work. There may be site managers who are curious about how much it costs to assemble such scaffolding. This time, we will introduce the market prices and unit costs for scaffolding assembly. By referring to this article and understanding the appropriate market price for scaffolding assembly costs, you can achieve unnecessary cost reductions. *For more details, please download the PDF document.*

There are various types of scaffolding used at construction sites. Scaffolding is installed to allow workers to safely perform tasks at heights. On the other hand, scaffolding must be easy to dismantle after the construction is completed. In other words, scaffolding needs to not only securely support workers during use but also be easy to assemble and disassemble. In this article, we will explain the types and size standards of scaffolding. *For more details, please download the PDF document.*

Scaffolding is necessary during construction work, but what types and precautions are there for roof work? According to the law, scaffolding is required when work is performed at a height of 2 meters or more. In roof construction, it is crucial to prioritize safety and consideration for neighboring residents by installing appropriate scaffolding. So, what kind of scaffolding should be installed for roof work? This time, we will explain the scaffolding used in roof construction. *For more details, please download the PDF document.*

Scaffolding, which is essential for construction work, is indispensable for the craftsmen involved in the project. Scaffolding is used in various locations from the initial stages of construction to the final stages. Moreover, scaffolding is not a one-time setup; it is adapted and reshaped according to the progress of the work. Scaffolding is necessary not only to ensure the safety of the craftsmen but also to allow them to focus on their tasks and perform quality work. Therefore, it is required to set up scaffolding that is easy for craftsmen to work with. In this article, we will explain the classification of scaffolding set up for different tasks. *For more details, please download the PDF document.*

If the type of scaffold is a frame scaffold, it can be assembled without using tools by preparing the specified materials. In the case of a wedge-type scaffold, the protrusions called "wedges" at both ends of the beam pipes are fitted into the "jacks" of the vertical posts and hammered in to secure the assembly. Both types of scaffolds are widely used on many construction sites because they can be easily assembled and disassembled. However, frame scaffolds and wedge-type scaffolds have standardized dimensions and are not suitable for use on complex-shaped land or in narrow spaces. When constructing a scaffold with high flexibility, a single-pipe scaffold is used. A single-pipe scaffold can be assembled with high flexibility by using a ratchet wrench or impact wrench in combination with single-pipe clamps and single-pipe pipes. Therefore, this time, we will explain the single-pipe clamps necessary for constructing a scaffold with high flexibility. *For more details, please download the PDF document.*

The development of EC (Electronic Commerce) has a significant impact on business and our lives. EC refers to "electronic transactions" and is used not only for selling products to general consumers but also for transactions between consumers and between businesses. The EC industry is supported by the IT industry, which operates websites, and the logistics industry, which delivers products to customers. The IT industry is innovating daily by utilizing AI technology and artificial intelligence. On the other hand, the logistics industry faces significant challenges, and its impact extends beyond the EC industry to manufacturing and construction industries as well. In this article, we will explain the impact of the challenges in the logistics industry on the construction industry. *For more details, please download the PDF document.*

The designs of buildings we usually see are mostly linear. In addition to being easier to construct, linear designs have the advantage of allowing for larger volumes. On the other hand, in structures that prioritize functionality, such as oil tanks and gas tanks, curved designs may be adopted. Oil and gas tanks are shaped round to evenly distribute the pressure, as the contents can expand due to changes in external temperature. Moreover, designs that utilize curves have become more common in hotels and commercial facilities. Even when constructing these circular structures, scaffolding is necessary. This time, I will explain the circular scaffolding used in the construction of these circular buildings. *For more details, please download the PDF document.*

In June 2018, a law related to work style reform was enacted, and the Labor Standards Act was amended. The major point of the amended Labor Standards Act, which was enforced from 2019, excluding certain industries like construction, is that the upper limit on overtime work hours has been clearly defined. A grace period was established for industries such as construction, transportation, and for doctors regarding the application of the law, but this will be lifted after April 2024, and compliance with the law will be mandatory. On the other hand, the novel coronavirus, which spread globally in 2020, had a significant impact on our lives. To prevent the spread of infection, the flow of people and goods was stagnated, greatly affecting economic activities. According to a survey by Teikoku Databank, as of September 2023, the cumulative number of companies that went bankrupt due to COVID-19 since February 2020 has exceeded 6,600. What will the environment surrounding the construction industry look like in the future? In this article, we will explain the current state of the construction industry, which is closely related to the future prospects of the scaffolding industry. *For more details, please download the PDF document.

The construction of condominiums in Japan has been concentrated in two major periods. The first is the period of rapid economic growth. Japan's period of rapid economic growth refers to the 19 years of economic expansion from 1955 to 1973. At that time, Japan had been ten years post-war, and industries, including automobiles and electrical machinery, rapidly developed by incorporating the latest technologies from abroad. The second is the bubble period. The bubble period refers to the era of economic prosperity from the late 1980s to the early 1990s. A significant factor behind the emergence of the bubble period was massive real estate investment. The selling prices of condominiums built during that time often exceeded hundreds of millions of yen, and they were referred to as "oku-shon" (hundred-million-yen condos). It was a time when even such high-priced condominiums sold like hotcakes. Currently, the aging of many large-scale buildings constructed during that time has become a problem. Therefore, this time, we will explain the current state of large-scale repair work on condominiums. *For more details, please download the PDF document.

Many Japanese buildings are constructed using linear materials such as columns and beams. When working at heights during the assembly of columns and beams, scaffolding is necessary. Historically, when constructing buildings, it was natural to set up scaffolding for the work. In this article, we will explain the history of scaffolding. *For more details, please download the PDF document.*

Recently, there is a term that has become less common, which is "3K." "3K" is a term that became popular around 1990, derived from the initials of "kutsui" (harsh), "kitanai" (dirty), and "kiken" (dangerous). Around 1990, Japan was at the peak of the bubble economy, and the job market was extremely favorable for job seekers. Because it was such a seller's market, jobs referred to as "3K" tended to be avoided. Even today, there are jobs still referred to as "3K," with the construction industry being a representative example. Within the construction industry, the work of craftsmen who first ascend to high places and assemble scaffolding to perform tasks safely is considered harsh and dangerous. This time, I will explain the job description of scaffolders and discuss the points that are considered tough. *For more details, please download the PDF document.

Architectural technology has existed for a long time, but in Japan, it has made remarkable progress since the end of the 19th century. One of the key factors behind this development was the production of cement in domestic factories. Until then, cement was imported from overseas, but once it became possible to supply cement domestically, many buildings using concrete began to be constructed. Concrete is a building material made by mixing cement with water, gravel, and sand, and it is used for foundations, columns, beams, and walls of buildings. Concrete is characterized by its high strength, but it has a weakness in that it is vulnerable to tensile stress. To address this weakness, "reinforced concrete," which incorporates steel bars into the concrete, has been adopted for large-scale buildings. To use this convenient building material, formwork for pouring concrete is necessary. In this article, we will explain the essential formwork support for concrete work. *For more details, please download the PDF document.*

You often hear the term "compliance" in many news articles and media. When translated into Japanese, it means "legal compliance," but it is important to note that it involves not only adhering to laws but also engaging in corporate behavior that reflects social conscience. The construction industry is no exception. Due to the high-risk nature of work in this field, "compliance" can be considered an important initiative in disaster prevention efforts. To engage in disaster prevention, it is necessary to adhere to laws and regulations, as these establish the rules for preventing disasters. If a disaster occurs while adhering to the rules, it may lead to the creation of new rules. However, if a disaster occurs while not following the rules, there is a possibility of facing severe administrative penalties. This time, I will explain the legal notifications required when carrying out large-scale scaffolding work. Failing to submit these notifications while conducting work will result in a "compliance violation," so it is essential to understand this thoroughly. *For more information, please download the PDF document.

In various industries, there are many terms that are used exclusively within that sector. These are known as "industry jargon." If you are not familiar with industry jargon, it can hinder communication within the industry. The construction industry also has its own jargon. There are many high-risk tasks in the construction industry, and if communication is impaired, it can lead to disasters or accidents. Among construction tasks, scaffold assembly work is particularly high-risk, and a lot of specialized terminology is used in scaffold assembly. A representative term is "tateji." "Tateji" is fundamental and plays an important role in scaffolding, so if you do not understand the term, you cannot perform the job. Therefore, this time, I will explain "tateji," which is the basis of scaffold work. *For more details, please download the PDF document.

In construction work, the installation of scaffolding that is safe, secure, and easy to work with is essential. When setting up scaffolding at a construction site, it is necessary to be well-versed in the structure and assembly methods of the scaffolding. This importance increases particularly when assembling scaffolding for high-rise buildings such as apartments and office towers. Workers who assemble scaffolding are required by law to undergo training and acquire the correct knowledge. Additionally, those who supervise scaffolding assembly work must also have qualifications mandated by law. This time, we will explain the qualification of "Scaffolding Assembly Supervisor," which is required for those who direct scaffolding work. *For more details, please download the PDF document.*

There are two main types of scaffolding at construction sites: "assembled scaffolding" and "suspended scaffolding." Assembled scaffolding is built from the ground up. Suspended scaffolding is used when scaffolding cannot be assembled from the ground, and it is constructed by suspending it from structures using chains or pipes. Assembled scaffolding includes wedge-type scaffolding, frame scaffolding, and single-pipe scaffolding. In this article, we will explain "wedge-type scaffolding," which is user-friendly and widely used at many construction sites. *For more details, please download the PDF document.*

To safely perform work at heights, it is important to use scaffolding correctly. Scaffolding at construction sites must comply with the standards set forth in the Occupational Safety and Health Act. The standards established by the Occupational Safety and Health Act include the structure of the scaffolding and fall prevention measures. One particularly important aspect is adhering to the maximum load capacity of the assembled scaffolding. Using scaffolding in a way that exceeds the maximum load capacity can lead to its collapse. Therefore, employers need to ensure that workers are aware of the maximum load capacity of the scaffolding. There are permissible load capacity and maximum load capacity for scaffolding. These loads have different meanings even if they are the same weight, so it is important to distinguish between them. In this article, we will explain the differences between permissible load capacity and maximum load capacity of scaffolding. *For more details, please download the PDF document.*

In high-altitude work at construction sites, an important aspect is fall prevention measures. It is essential to prevent not only the workers from falling but also the tools and materials. Therefore, fall prevention measures for scaffolding in high-altitude work are stipulated by national laws. (Refer to Article 537 and Article 563 of the Industrial Safety and Health Regulations.) This time, I will explain the interlayer net, which is a measure to prevent the falling of objects among fall prevention measures. *For more details, please download the PDF document.

The craftsmen known as "tobi" are active at construction sites. The history of tobi craftsmen is very old, and it is said that they already existed when Horyu-ji, the oldest wooden building in Japan, was established. At that time, to build tall structures, scaffolding was assembled, and various craftsmen worked on it. However, today, even among tobi craftsmen, they are classified into several types depending on their job responsibilities. In this article, we will explain the types of tobi work and the craftsmen often referred to as "ashiba-ya," who work alongside tobi craftsmen, for those aspiring to become tobi craftsmen. *For more details, please download the PDF document.

To safely perform work at heights, fall prevention measures for workers are crucial. But what about safety measures for those not involved in the work? If tools or materials used in high-altitude work fall, the energy upon hitting the ground can be very significant. If a falling object strikes a person, it can lead to a serious accident, which is why the installation of a board called a toe board at the edge of the working platform on scaffolding is mandatory. However, relying solely on toe boards to prevent falling object accidents is likely insufficient. Measures against potential falling objects are necessary. This time, we will explain the responses to prevent accidents caused by falling objects from temporary scaffolding. *For more details, please download the PDF document.*

To work at high places, scaffolding is necessary. Scaffolding comes in various types, ranging from large structures that enclose entire buildings used in construction work to those used only for repairing and maintaining equipment installed at high locations within a limited area. This time, I will explain the rolling tower used only within a limited range. *For more details, please download the PDF document.*

In construction sites, there are industry-specific technical terms. In high-risk environments such as working at heights, communication problems can lead to mistakes and accidents. That said, for those with less experience, it may take time to learn these technical terms. Therefore, this time, we will explain the technical terms used in the scaffolding industry. *For more details, please download the PDF document.*

In construction work, scaffolding is essential for performing tasks at height. Currently, scaffolding is used in various construction projects. At first glance, scaffolding may seem to be set up in a straightforward manner, but if it is not properly designed and assembled, it can hinder work. Therefore, this time, I will explain the design of scaffolding and how to create drawings for it. *For more details, please download the PDF document.*

In construction work, it is fundamentally necessary to secure scaffolding, which serves as the working platform. To prevent labor accidents caused by falls from scaffolding, workers must have knowledge about scaffolding, work methods, and labor accident prevention. In response to the frequent occurrence of labor accidents, a part of the Labor Safety and Health Regulations was revised in 2015, adding "Special Education for Scaffolding Assembly." Therefore, this time we will provide a detailed introduction to "Special Education for Scaffolding Assembly." We will also confirm the content of the training, the process for obtaining qualifications, and the differences from the "Scaffolding Assembly Work Supervisor Skills Training." *For more information, please download the PDF document.

During the period of rapid economic growth from the 1950s to the 1970s, the government and businesses invested a lot of funds to construct many buildings. These buildings, now around 50 to 60 years old, are showing signs of aging. Many structures are reaching the time for reconstruction or major repairs. In demolition and construction work, high-altitude work is almost always necessary. To carry out high-altitude work safely and efficiently, it is essential to set up temporary scaffolding. Even when simply referred to as scaffolding, it can range from a few meters to over several dozen meters in height. Therefore, this time, we will provide a detailed explanation of the rules for scaffolding installation. *For more details, please download the PDF document.*