AUSTRALIAN LEGAL LIMITS AND RELATIONSHIP TO BRIDGE DESIGN LOADS . 15TH ARRB CONFERENCE, DARWIN, NORTHERN TERRITORY, 26-31 AUGUST 1990; PROCEEDINGS PARTS 1 TO 7

This paper reviews the current Australian legal limits from the standpoint of bridges. The effects induced in bridges by typical legal vehicles are considered for simply supported spans up to 50 m. It is observed that the legal limits permit significant variation in internal axle group spacing for a vehicle that complies with the Bridge Formulae. This leads to a demonstration that legal vehicles can induce larger effects in bridges than permit vehicles. The effects induced by the family of legal vehicles are compared with bridge design loadings and found to be inconsistent. It is suggested that an A123 configuration be investigated as a bridge design load with trailers added for specified routes where B Doubles and road trains are permitted. The Ontario equivalent base length concept is presented as an alternative approach which enables legal limits, permit vehicles and design vehicles to be related. This correlation is currently poor under the bridge formulae approach. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    ARRB

    Melbourne, Victoria  Australia 
  • Authors:
    • Heywood, R J
  • Publication Date: 1990

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00609321
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM