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    Empirical investigation of the average deployment force of personal fall-arrest energy absorbers

    Access Status
    Fulltext not available
    Authors
    Goh, Yang Miang
    Date
    2015
    Type
    Journal Article
    
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    Citation
    Goh, Y.M. 2015. Empirical investigation of the average deployment force of personal fall-arrest energy absorbers. Journal of Construction Engineering and Management. 141 (1).
    Source Title
    Journal of Construction Engineering and Management
    DOI
    10.1061/(ASCE)CO.1943-7862.0000910
    ISSN
    0733-9364
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/10157
    Collection
    • Curtin Research Publications
    Abstract

    The personal energy absorber (PEA) is a critical component of a personal fall arrest system (PFAS), and it is meant to dissipate the energy generated during a fall to prevent injuries to the user. When designing PFASs, engineers need to estimate the fall distance of the user, and one of the parameters needed is the average deployment force (Fa) of a PEA. However, currently there is a lack of empirical information on Fa. The guidance for the estimation of Fa stipulated in the North American standards Z259.16 and Z359.6 did not provide supporting empirical data and appeared to be focused on lower-capacity PEAs (class E4 or Type 1) that are not common in regions like Australia, New Zealand, Europe, and Singapore. Thus, this study aims to provide empirical data for the estimation of Fa of higher-capacity PEAs (class E6 or Type 2) represented by AS/NZS 1891.1:2007 PEAs. Thirty-one force-time charts of drop tests conducted on AS/NZS 1891.1-certified PEAs were evaluated, and it was found that the Fa ranged from 3.2 to 4.7 kN with a mean of 3.9 kN. In contrast to the guidance in Z259.16 and Z359.6, the data does not support estimating Fa based on 80% of maximum arrest force. The study also provided empirical basis for approximating Fa using energy-balance calculation. This paper recommends that in the absence of manufacturer's information on Fa and other test data, a reasonable estimate of Fa of PEA certified to AS/NZS 1891.1:2007 is 3.4 kN (10th percentile) and a conservative estimate is 3.2 kN (minimum). In the absence of publicly available empirical data of PEA certified to other standards, the results in this paper can provide useful guidance for estimation of Fa certified to other similar standards.

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