Legal load restrictions on individual axles and groups of axles are discussed in relation to bridge structures. A comparison is made of the different types of axle spacing/mass schedules used to restrict group axle loads. Structural implications are outlined, and a theoretical method for comparing schedules is presented. A systematic procedure is described which determines the most adverse effects on bridge structures arising from the enforcement of a given set of legal restrictions on a number of trucks of specified geometry. The theoretical considerations behind the axle spacing/mass schedule proposed by the NAASRA economics of road vehicle limits study are discussed. Results obtained by use of a computer program for a number of studies on the proposed load limits and possible exemptions are presented. The paper concludes with a summary of the main points and the conclusions reached in deriving a new axle spacing/mass schedule for the Australian situation. /Author/TRRL/

  • Record URL:
  • Supplemental Notes:
    • Proceedings of 8th Conference, University of Western Australia, Perth.
  • Corporate Authors:

    ARRB Group Ltd.

    Vermont South, Victoria  Australia 

    Australian Road Research Board

    P.O. Box 156
    Nunawading, Victoria 3131,   Australia 
  • Authors:
    • Charett, D E
    • WEBBER, J R
  • Conference:
  • Publication Date: 1976


  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 33-43
  • Serial:
    • Volume: 8
    • Issue Number: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00164212
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS, ATRI
  • Created Date: May 18 1978 12:00AM