CONSTRUCTION OF THE CONCRETE SAFETY BARRIER

The special construction features and problem areas are described and the costs associated with the barrier construction are reviewed. Construction flexibility is provided in that the barrier can be formed conventionally, slipformed or precast. It can be built in restricted work areas without hampering traffic flow. A variety of methods are available for obtaining lateral restraint to impact: footings cast separately or monolithic with the barrier, steel ties, keyways, longitudinal reinforcement either continuous or post-tensioned, etc. None of these methods require driven or buried posts. The details are outlined of site-cast or cast-in-place construction for formed barriers and slip-formed barriers. Areas requiring special attention are identified as the concrete slump and aggregate gradation, finishing and surface texture. States that have used the precast construction method are listed. Base restraints, jointing, reinforcement, differential roadway elevation, the incorporation of lighting and sign standards, end treatment, methods utilized the contrast color, texture, or outline of the barrier to delineate if form the adjacent roadway, curing and protective coatings are discussed. Special installations such as reflecting delineators (to outline location of the barrier) and glare screen (required in some states) are described. Several states have used the concrete barrier on shoulders as well as in the median.

Media Info

  • Pagination: p. 203-211
  • Serial:
    • Volume: 58

Subject/Index Terms

Filing Info

  • Accession Number: 00139358
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 16 1976 12:00AM