Development of staking considerations for K-rail

Full-scale crash testing was conducted on various staking configurations for pre-cast concrete barrier (California K-rail). The staking configurations tested were developed in effort to optimize cost and worker safety. Testing was conducted in accordance with NCHRP Report 350. The tested barriers consisted of twelve or thirteen concrete segments, each 6045 mm (20 ft) in length. The segments were placed on 125-mm (5-in) AC pavement and connected together with 31.8 x 660 - mm (1.25 x-26 in) pins. Each segment was secured to the ground using 25 x 610-mm (24-in) stakes either uncapped or capped. The tests were performed at the Caltrans Dynamic Test Facility in West Sacramento, California. A total of six crash tests were conducted under Report 350 Test Level 3-11. Two testing groups were established: K-rail as a median barrier and K-rail adjacent to an excavation. Each group was tested under three staking configurations. One test from the median barrier group and two tests from the excavation group were within the limits of Report 350 Test Level 3-11. It is recommended that staked K-rail be approved for use on California State highways when the following conditions are present: 1. When K-rail is placed as a semi-permanent median barrier with less than 610 mm (2 ft) from the edge of travel way in both directions, use four capped stakes per section every other section. 2. When K-rail is placed less than 610 mm (2 ft) from the edge of an excavation, use two capped stakes per section along the traffic side. The distance between the K-rail and excavation must be a minimum of 75 mm (3 in).


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Media Info

  • Media Type: Digital/other
  • Edition: Final
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 131p

Subject/Index Terms

Filing Info

  • Accession Number: 01747109
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Report/Paper Numbers: FHWA/CA/MI-2006/21, 65-680928
  • Created Date: Jun 20 2016 6:39PM