BRIDGE WATERPROOFING COMBINING FORM IN PLACE AND PREFORMED SHEET SYSTEMS

A post tensioned railway bridge was built in the Town of Timmins under M.T.C. Contract 76-430, for Ontario Northland Railway, by Looby Const. Ltd. of Dublin, Ontario. The bridge had to be constructed in two halves in order that rail traffic could be maintained at all times. The east half was constructed first while traffic was maintained on the existing subway and then traffic was switched to the new structure and the old bridge demolished. The second half was then built. The bridge was designed to be waterproofed with butyl membrane sheet under a railway specification in the special provisions of the contract, but when the first half of the bridge was ready for waterproofing in the middle of July '77, the specified material was unavailable. Looby Const. sought approval for an alternate method of waterproofing, proposed by the waterproofing subcontractor Bemac Protective Coatings of Downsview, Ontario, which was granted. This report covers the work performed under the approved alternative design, which uses a hot poured rubberized asphalt form in place system, as a bonding agent for a thinner than specified butyl sheet. (Author)

  • Corporate Authors:

    Ontario Ministry of Transportation & Communic, Can

    1201 Wilson Avenue
    Downsview, Ontario M3M 1J8,   Canada 
  • Authors:
    • Evers, R C
  • Publication Date: 1977

Media Info

  • Features: Photos;
  • Pagination: 16 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00335502
  • Record Type: Publication
  • Report/Paper Numbers: Rpt. EM-16
  • Files: TRIS
  • Created Date: Sep 16 1981 12:00AM