INFLUENCE OF BASEBOARD HEIGHT ON RESISTANCE TO WIND FORCE OF SCAFFOLDS AT WINDWARD SIDE OF BUILDINGS

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Hiroki Takahashi ◽  
Mizuki Aoki ◽  
Katsutoshi Ohdo ◽  
Kazuo Ohgaki
Keyword(s):  
Construction Industry ◽  
Wind Tunnel Test ◽  
Design Guidelines ◽  
Industrial Safety ◽  
Windward Side ◽  
Construction Sites ◽  
Wind Force ◽  
Force Coefficient ◽  
Safety And Health ◽  
The Relationship

The Japanese Industrial Safety and Health Law was revised in March 2009 to introduce new measures by which to prevent accidental falls in the construction industry. As part of this revision, regulations on the installation of guard rails, toe boards, mesh sheets, and other components in appropriate positions on scaffolds were established. When scaffolds are installed in construction sites, their resistance against wind force needs to be calculated. Japanese design guidelines stipulate a specific scaffold resistance against wind force, but such regulations are applicable to conventional scaffolds. The problem with outdated regulations is that scaffolds are used during building construction without practitioners knowing whether the existing guidelines are suitable for new-style scaffolds. Accordingly, this study was conducted a wind tunnel test to examine the wind force exerted on building scaffolds, with the parameters being baseboard height and distance between scaffolds and a building. The relationship between the wind force coefficient of the scaffolds and baseboard height was proportional only on the scaffolds. As the distance between the scaffolds and the building lengthened, however, the relationship between the parameters reflected a steeper curve as baseboard height increased. Whenever the scaffolds were set near the building, negative pressure acted on the scaffolds as a consequence of the downwind structure. This study was examined the correction factor of the wind force coefficient of the scaffolds.

WIND TUNNEL TEST OF SCAFFOLDS SET WITH WALL CONNECTERS WITH BASEBOARD HEIGHT AS A PARAMETER

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Hiroki Takahashi ◽  
Katsutoshi Ohdo
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Wind Load ◽  
Design Guidelines ◽  
Industrial Safety ◽  
Construction Sites ◽  
Wind Force ◽  
Force Coefficient ◽  
Safety And Health ◽  
Design Calculations

The Japanese Industrial Safety and Health Law were revised in March 2009 to introduce new measures by which to prevent accidental falls in the construction industry. As part of this revision, authorities established regulations on the provision of guard rails, toe boards, mesh sheets, and other components in appropriate positions on scaffolds. When scaffolds are set in construction sites, their strength against wind force needs to be calculated. Japanese design guidelines regulate the strength of scaffolds against wind force; however, the design guidelines were written with old-style scaffolds in mind. It is not known whether the design guidelines are appropriate for new-style scaffolds. At the construction sites, the scaffolds connect to structures through the use of wall connecter, to keep scaffolds from falling down. The wind load that acts on the scaffolds was supported by the wall connecter at the construction sites. On the other hand, in conventional designs, a baseboard is used on construction sites. In this study, to set scaffolds at construction sites while using baseboard height as a parameter, we performed a wind tunnel test to examine the wind load that acts on scaffolds that have been set with wall connecters. The wind tunnel device has a total length 74,900 mm, while the device interior is 2,300 mm wide and 2,000 mm high. The load sell to set the wall connecter was used to measure wind load. The models, each of which was 1/10 in size, were used on scaffolds at general construction sites. The scaffolds were three stories high and one span wide. A baseboard was situated on one side of the long face of the scaffolds. The wind speed was set at a uniform flow of 10 m/s, because the wind force coefficient of a cylinder is stable at this speed. The characteristic length was positioned 5 mm along the diameter of a leg member. The Reynolds number was approximately 3.5 × 103. From our results, the wind force coefficient was found to increase as the baseboard height increased. With regard to efficient scaffold design, calculations of the wind force coefficient should therefore consider baseboard height.

WIND TUNNEL TEST FOR CALCULATING WIND FORCES ON SCAFFOLDS WITH BASEBOARD HEIGHT AS A PARAMETER

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Hiroki Takahashi ◽  
Katsutoshi Ohdo ◽  
Seiji Takanashi
Keyword(s):  
Wind Tunnel ◽  
Construction Industry ◽  
Wind Tunnel Test ◽  
Industrial Safety ◽  
Design Codes ◽  
Health Law ◽  
Wind Force ◽  
Force Coefficient ◽  
Safety And Health ◽  
Current Design

The Japanese Industrial Safety and Health Law was revised in March 2009 to introduce new measures concerning accidental falls in the construction industry. This revision mandates the use of guard rails, handrails, and other scaffold components. The wind load criteria and structural specifications of scaffolds are regulated by current design codes. Nevertheless, these provisions do not necessarily comply with the newly incorporated legal requirements because they apply to old-style scaffolds. This study examined the wind force on scaffolds by wind tunnel test, with baseboard height used as a parameter. The wind force coefficient of one story of scaffolds was calculated. Wind force coefficient increased as baseboard height increased. The wind force on the scaffolds equipped with baseboards is 9.2 times that on the scaffolds without baseboards. The baseboard must be greater than or equal to 15 cm to satisfy regulation requirements. The wind force coefficient of scaffolds with a 15 cm baseboard is 1.5 times that of the scaffolds without a baseboard. In scaffold design, baseboard height should be considered to guarantee a suitable wind force coefficient.

INFLUENCE OF BASEBOARD HEIGHT ON WIND FORCE OF SCAFFOLDS AT BUILDING EDGE

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Hiroki Takahashi ◽  
Katsutoshi Ohdo ◽  
Kazuo Ohgaki
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Design Guidelines ◽  
Construction Sites ◽  
Wind Force ◽  
Force Coefficient ◽  
Building Components ◽  
Modern Building

When scaffolds are installed in construction sites, their resistance against wind force needs to be calculated. Japanese design guidelines require a specific scaffold resistance against wind force, but such rules and regulations are applicable solely to old-style scaffolds. A number of risks are inherent in the existing guidelines. First, new-style scaffolds are used in construction sites without practitioners knowing whether the design guidelines are appropriate for modern building components. Second, scaffolds are set near buildings, but workers are unaware of the effect of the wind force at the building edge. Finally, conventional designs feature the use of baseboards as scaffold components. While considering the aforementioned issues, a wind tunnel test was carried out as part of this study to examine the wind force exerted on scaffolds erected near a building edge. The parameters used in the test were baseboard height and the distance from the building edge. From the results, when the distances between the building’s center and the scaffold’s center are 180 mm, the wind force is high. Additionally, when the baseboard height is 130 mm, the wind force is high. This study examined the correction number for the wind force coefficient of scaffolds with baseboards that were positioned at building edge. Whenever the scaffolds were set near the building edge, we needed to revise the wind force coefficient of the scaffolds.

Well-Being in Practice and Policy

2020 ◽  
pp. 52-73
Keyword(s):  
Control Systems ◽  
Construction Industry ◽  
Well Being ◽  
Global Scale ◽  
Design Guidelines ◽  
The People ◽  
Ex Post ◽  
And Control ◽  
The Relationship

Recent research focuses on the concept of well-being, aiming to systematize it and obtain design guidelines. In latest years, various building certification systems have arisen, which, although used for ex post evaluations, contain, specularly, design guidelines. In a first phase the concept of well-being was intended on a global scale, linked to the pitfalls of pollution and consumption of resources, so design guidelines and control systems developed within the construction industry to ensure the conservation of the environment and therefore the “well-being” and “health” of human communities. Having therefore developed certification systems measuring and evaluating the performance of buildings in relation to their impact on the environment and its resources, we are now faced with a shift of attention on a smaller scale, linked to the performance that buildings offer not so much with respect to the environment as to the people who live in them. This chapter explores the concepts behind such systems and the relationship between building certification systems and people's well-being.

Relationship study between the student learning approach in the occupational safety and health field and acquired competencies

2019 ◽  
Vol 1 (95) ◽  
pp. 32-41
Author(s):  
O. Nanka ◽  
M. Lysychenko ◽  
M. Kiriyenko ◽  
V. Pavlykivskyi ◽  
T. Duyunova ◽  
...  
Keyword(s):  
Student Learning ◽  
Occupational Safety ◽  
Educational Process ◽  
Occupational Safety And Health ◽  
Industrial Safety ◽  
Learning Approach ◽  
Training Methods ◽  
Safety And Health ◽  
Relationship Study ◽  
The Relationship

Purpose: To search for training methods for specialists in industrial safety, environmental and occupational safety and health in conditions of insufficient (or absent) laboratory support and to study the relationship between the student learning approach and acquired competencies. Design/methodology/approach: To study modern advances in industrial safety, environmental and occupational safety and health and training methods for specialists a systematic literature review approach has been used. For publications from 2017, queries were asked through keywords and safety related topics. To relationship study between the student learning approach and acquired competencies a student survey on random sampling has been used. A total of 112 students of the 3rd and 4th year of study at the university were interviewed. Findings: The results of the survey showed that the students’ number who simultaneously successfully answered theoretical questions and completed practical tasks is 33.8% from the group with theoretical training and 75% from the group that was trained in the workplace. The relationship between the groups with a visit to the existing enterprise and acquired competencies was justified by the association coefficient and contingency coefficient that are 0.7 and 0.4 respectively. Research limitations/implications: A student’s survey was conducted at only one university. Questions were asked only according to the curriculum of the course “Labour Protection”. No survey for other training courses conducted. Practical implications: The research results are reasonable and can be applied at universities to improve the educational process of training specialists. Originality/value: It was proposed that students be trained using existing enterprises as a laboratory base and by the methods of statistics mathematical processing was substantiated the proposal feasibility.

Constructing Conflict: The Politics of Job Creation Policy, Precarious Work, and Citizenship in South Africa’s Construction Industry

2021 ◽  
pp. 089692052110355
Author(s):  
Ben Scully ◽  
Thabiso Moyo
Keyword(s):  
Construction Industry ◽  
Social Inclusion ◽  
Large Scale ◽  
Job Creation ◽  
Public Works ◽  
Construction Sites ◽  
Citizenship Rights ◽  
Wage Work ◽  
The One ◽  
The Relationship

The paper examines the politics of state job creation policy in South Africa. We focus on the construction industry, which is a major sector for job creation policy, especially through a large scale public works programme. We argue that, while the creation of jobs is framed by government as a path towards dignity and social inclusion for poor and unemployed citizens, the precarious reality of low-wage work in the construction industry undermines the potential pro-social effects of wage employment. Beneficiaries of job creation policy often experience frustration and alienation, and the construction sites on which they work are often marked by conflict and disruption. We describe two different forms that this conflict takes, on the one hand demanding wage work as a citizenship right, on the other eschewing generalized citizenship claims in favour of particularistic and exclusionary demands for jobs based on localized identities. These seemingly contradictory but intertwined types of conflict show the complexity of the relationship between state job creation and citizenship rights in an industry and an economy defined by precarious forms of employment.

scholarly journals Development of Scales to Measure and Analyse the Relationship of Safety Consciousness and Safety Citizenship Behaviour of Construction Workers: An Empirical Study in China

2019 ◽  
Vol 16 (8) ◽  
pp. 1411 ◽  
Author(s):  
Xiangcheng Meng ◽  
Huaiyuan Zhai ◽  
Alan H. S. Chan
Keyword(s):  
Construction Industry ◽  
Developed Countries ◽  
Influential Factors ◽  
Construction Workers ◽  
Construction Sites ◽  
Direct Role ◽  
Safety Issues ◽  
Long Period ◽  
Relationship Of ◽  
The Relationship

China’s construction industry has experienced a long period of development and reform but compared to developed countries, safety on construction sites in China continues to present serious problems. Safety consciousness and safety citizenship behaviour are influential factors related to safety issues in the construction industry and may play a direct role in improving the safety of personnel on construction sites. However, recently no research has been focused on the relationship between safety consciousness and safety citizenship behaviour. Therefore, this paper aimed to investigate the relationship between safety consciousness and safety citizenship behaviour for personnel working on construction sites in China by using a questionnaire survey and statistical analysis, so that correlation between safety consciousness and safety citizenship can be demonstrated and effective measures suggested to improve the safety of construction workers in China, and perhaps in other countries as well.

scholarly journals Construction supervision during capital construction, reconstruction and re-profiling

2019 ◽  
Vol 265 ◽  
pp. 07022 ◽  
Author(s):  
Dmitriy Topchiy ◽  
Alexey Yurgaytis ◽  
Evgeniy Babushkin ◽  
Diana Zueva
Keyword(s):  
Statistical Analysis ◽  
Construction Industry ◽  
Current Situation ◽  
Construction Process ◽  
Construction Sites ◽  
Supervision System ◽  
Construction Supervision ◽  
Capital Construction ◽  
The Relationship

This article raises problems related to the shortcomings in the existing field of construction supervision and the relationship between participants in the construction process. An article dedicated to the implementation of comprehensive and comprehensive construction supervision at capital construction sites, bringing the construction supervision system to a standard that minimized the customer’s risks and minimized the number of errors in the construction industry. The aim of the article is to find solutions and ways to resolve problems, because of which there are many qualities, as well as the timing of projects for investment and construction activities. On the basis of a statistical analysis of the current situation and world experience, the main proposals for the improvement of construction supervision systems are presented.

scholarly journals The Perception of Occupational Safety and Health (OSH) Regulation and Innovation Efficiency in the Construction Industry: Evidence from South Korea

2021 ◽  
Vol 18 (5) ◽  
pp. 2334
Author(s):  
Jaeho Shin ◽  
Yeongjun Kim ◽  
Changhee Kim
Keyword(s):  
Construction Industry ◽  
Occupational Safety ◽  
Occupational Safety And Health ◽  
Data Envelopment ◽  
Safety Issues ◽  
Safety And Health ◽  
Bootstrap Dea ◽  
Using Data ◽  
Interest In Research ◽  
The Relationship

Due to safety issues in the construction industry, interest in research on occupational safety and health (OSH) regulations remains high. Previous studies indicated that OSH regulations not only affect performance in and of themselves, but also indirectly by increasing awareness of such regulations. Studies also demonstrated that OSH regulation can affect innovation and corporate safety. However, the effect of OSH regulation on innovation remains unclear, as the relationship between the perception of OSH regulation and innovation is not fully understood. This study measures the innovation efficiency of companies in the Korean construction industry using data envelopment analysis (DEA), and investigates the relationship between innovation efficiency and companies’ perceptions of OSH regulations. Results indicate that companies that positively recognize OSH regulations tend to be more innovative than those that do not. This study also validates differences in innovation efficiency depending on the perception of OSH regulations by bootstrap DEA. The results of this study suggest appropriate strategies to promote innovation in the construction industry from the perspectives of both government and practitioners in firms.

scholarly journals A PRELIMINARY SURVEY ON SAFETY PRACTICES AT CONSTRUCTION SITE: TOWARDS SAFE ENVIRONMENT FOR PUBLIC

2021 ◽  
Vol 6 (26) ◽  
pp. 300-310
Author(s):  
Nurul Ain Shuhada Azil ◽  
Izatul Laili Jabar
Keyword(s):  
Construction Industry ◽  
Public Safety ◽  
Occupational Safety ◽  
Occupational Safety And Health ◽  
Preliminary Survey ◽  
Construction Site ◽  
Construction Sites ◽  
Safety Practices ◽  
The Public ◽  
Safety And Health

The construction industry is globally known as one of the most hazardous workplaces. Companies in the construction sector are undeniably often focused on completing projects on time, which results in tight work schedules and increases the risks of regular construction site activities, especially for the public who lives in the area. Inadequate rules and regulations in public safety and construction sites not practicing the safety practices to protect the public from harm are potential to cause public accidents to happen. Additionally, little improvement in safety practices at the construction sites and lack of awareness in implementing proper safety practices at a construction site could cause the increasing the rate of public accidents too. This study merely aims to explore the safety practices to be implemented at a construction site in a way to prevent public accidents from occurring. In order to achieve the aim, this study has two (2) objectives; 1: to determine the experience in handling accident cases involving the public at a construction site, and, objective 2: to explore the safety practices to be implemented at the construction site. For this preliminary survey, the qualitative research design was selected and the total number of five (5) professional individuals specialized in safety and health in construction sites were chosen as interviewees based on their experiences in handling public safety issues in construction sites. The results show the most recommended safety practices that need to be implemented which is barricade all entrances and exits of the construction site to prevent access from the public. This study provides good insights to the Department of Occupational Safety and Health (DOSH), National Institute of Occupational Safety and Health (NIOSH), and Construction Industry Development Board (CIDB) in identifying the need for safety practices to prevent public accidents at the construction site in congested urban areas.

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