TRAFFIC RAIL POST FOOTINGS

Results of investigations at scenes of highway accidents in which safety barriers have received severe impacts have shown that where concrete is used for post footings, the footings are not always constructed to the correct standard dimensions. The British Department of Transport specification calls for the footing to be 350 mm diameter (or 310 mm square) by 950 mm deep; footings are frequently twice the correct diameter and half the required depth. The use of cylindrical forms has been studied, in field trials, as a means of controlling the construction of the footings. A satisfactory performance has been achieved using a prefabricated cylinder to the correct dimensions in very poor ground conditions, where concrete footings would normally be specified.

• Record URL:
  • https://onlinepubs.trb.org/Onlinepubs/trcircular/341/341-011.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00978515
• Supplemental Notes:
  • This paper appears in Transportation Research Circular No. 341, International Roadside Safety Hardware. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • MACDONALD, M D
• Publication Date: 1988-12

Media Info

• Media Type: Digital/other
• Features: Figures;
• Pagination: p. 84-88
• Serial:
  • Transportation Research Circular
  • Issue Number: 341
  • Publisher: Transportation Research Board
  • ISSN: 0097-8515

Subject/Index Terms

• TRT Terms: Construction management; Crash investigation; Field tests; Footings; Guardrails; Performance; Posts; Size; Specifications; Vertical supports
• Old TRIS Terms: Construction control; Cylindrical forms
• Subject Areas: Construction; Design; Highways; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure;

Filing Info

• Accession Number: 00479221
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jan 31 1989 12:00AM