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  United States  10036
• Authors:
  • PILARSKI, L
• Publication Date: 1976-12

Media Info

• Features: Figures; References;
• Pagination: p. 41-42
• Serial:
  • Construction Methods and Equipment
  • Volume: 58
  • Issue Number: 12
  • Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

• TRT Terms: Box girders; Bridge members; Bridges; Curved bridges; Length; Scaffolds
• Uncontrolled Terms: Bridge spans; Curved box girders; Sliding
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

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