SLIDING SCAFFOLD SYSTEM CASTS BRIDGE'S CURVING BOX GIRDER

A 34 ft. - span highway bridge is being built using a 223 ft-long launching girder (Movable Seafold System, MSS) which slides from pier to pier, forming a 13 x 192/3-ft. concrete box girder that S-curves over 2,900-ft. radii. The MSS has advanced at one span every 3 weeks. A crew of 10 spends 3 days of the cycle advancing the MSS. Placing the box girder's bottom slab, and post-tensioning tendons. The rest of the cycle is spent casting the rest of the box girder in 2 stages. Two monorail hoists that ride the lower flanges of the MSS's top members carry precast units. To travel the typical 200-ft c-c distance between piers, the MSS hydraulically jacks itself forward in a 3-step cycle. This type of MSS becomes economical on bridges of 20 spans and span distance is not a limiting factor.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  USA  10036
  • Authors:
    • PILARSKI, L
  • Publication Date: 1976-12

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Filing Info

  • Accession Number: 00149201
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 30 1977 12:00AM