Advanced Steel Construction

Vol. 13, No. 4, pp. 318-342 (2017)


STABILITY OF INDEPENDENT HEAVY-DUTY SCAFFOLDS:

AN EXPERIMENTAL STUDY

 

Peng, Jui-Lin1,*, Wang, Chung-Sheng2, Lin, Chen-Chung3 and Lin, Shu-Ken4

1Professor, Department of Civil and Construction Engineering, National Yunlin University of Science and Technology, Taiwan, ROC

2 Ph.D. Student, Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology, Taiwan, ROC

3Associate Researcher, Institute of Labor, Occupational Safety and Health, Ministry of Labor,Executive Yuan, Taiwan, ROC

4Lecturer, Department of Civil Engineering, National Chung Hsing University, Taiwan, ROC

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 7 June 2016; Revised: 27 August 2016; Accepted: 26 October 2016

 

DOI:10.18057/IJASC.2017.13.4.1

 

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ABSTRACT

This study explores the stability of independent heavy-duty scaffolds by means of loading tests. The study results show that 3-story and 2-story independent heavy-duty scaffolds have very similar load capacities. The top and base screw jacks provide extra bending moment stiffness for independent heavy-duty scaffolds, which enhances the load capacity of the structural system. Horizontal braces also enhance the load capacity and the stable of independent heavy-duty scaffolds and should not be neglected. Extension of the top and base screw jacks has unobvious effect on the load capacity of independent heavy-duty scaffolds. The constructors may take advantage of this feature to adjust the height of top and base screw jacks in order to suit internal clearances and landforms of buildings. Given a similar height, as long as the number of joints is constant, the load capacities of different setups of independent heavy-duty scaffolds do not significantly vary. The eccentric load has obvious effect on the load capacity of independent heavy-duty scaffolds, which should be noted in the structure design. The age-old scaffolds treated with the red lead rust resistant paint and the used rust scaffolds have a great effect on the load capacity of the independent heavy-duty scaffolds. Therefore, they should be avoided on construction sites as much as possible. The lower limit value of the strength of reusable materials can be accurately simulated by means of the second loading in this study. Designers can choose proper strength reduction factors for reusable scaffolds based on safety requirements to conduct the structural design for independent heavy-duty scaffolds.

 

KEYWORDS

Buckling, critical load, falsework, independent heavy-duty scaffold, stability


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