Journal of Failure Analysis and Prevention

, Volume 11, Issue 1, pp 71–76 | Cite as

Failure of a Sliding Metal Gate Due to Single-Impact Bending Fracture and Poor Installation Practice

  • J. K. L. Lai
  • K. H. Lo
  • K. W. Wong
Technical Article---Peer-Reviewed


This work looks into the failure of a sliding metal gate and the current practice for installing such sliding gates. The root cause of the failure was fracture of an L-shaped stopper that is very commonly used in sliding metal gates. Although fatigue associated with repeated impacts due to gate opening and closing operations are often blamed for failure of L-shaped stoppers, single-impact bending fracture was implicated in the present case. Besides L-shaped stoppers, it is a common practice to install a small metal stopper in the floor track to prevent gate overrunning. The suitability of installing such stoppers in floor track is questioned in the present study.


Sliding metal gates Fatigue Single-impact bending fracture 


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Copyright information

© ASM International 2010

Authors and Affiliations

  1. 1.Department of Physics and Materials ScienceCity University of Hong KongHong KongChina
  2. 2.Department of Electromechanical EngineeringUniversity of MacauMacauChina

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