Modular Form Travelers

The VSL form traveler system is an economical and efficient construction method for balanced cantilever concrete bridges and provides a rigid frame to minimize deflections during concrete placement.

Contact Us

Modular Form Travelers

The VSL form traveler system is an economical and efficient construction method for balanced cantilever concrete bridges and provides a rigid frame to minimize deflections during concrete placement.

Contact Us

Form Travelers for Segmental Bridge Construction

STRUCTURAL TECHNOLOGIES provides a custom engineered, highly flexible form traveler system for a variety of segment lengths, depths and structure configurations. The form traveler system is used for construction of balanced cantilever concrete bridges and is designed to provide a rigid frame to minimize deflections under load.

 

System Flexibility:

Designed for a variety of segment lengths, the form traveler system varies from 3m to 5.5m and can support concrete and formwork loading from 100t to 450t. The traveler system design can also accommodate wide variations in segment length, height, web thickness and deck width and geometry. Vertical deflections at the leading edge of the traveler assembly are less than 25mm at maximum loads.

 

System Operation:

The form traveler system is economical and efficient to use – designed with pinned connections for simplicity of erection and dismantling. Launching is accomplished by advancing the system forward on rails. The interior formwork remains within the previously poured section in order to facilitate the placing of the reinforcing steel in the bottom slab and webs of the new segment. The segment construction cycle can generally be carried out in 4-5 days. A typical segment cycle consists of:

  1. The System is launched on rails to the new segment location
  2. The external formwork is aligned, leveled and fixed into place.
  3. Reinforcing steel is placed in the bottom slab and web walls
  4. The interior formwork assembly is advanced, and the top deck slab soffit and wall forms are leveled and fixed into place.
  5. Reinforcing steel and post-tensioning tendons are placed in the deck slab.
  6. Placement in bottom slab, web wall and deck slab concrete.
  7. Stressing of post-tensioning tendons.
  8. The internal and external formwork is stripped from the cast and cured segment and the VSL Form Traveler is launched to the next segment.
     

STRUCTURAL TECHNOLOGIES' Services:

STRUCTURAL TECHNOLOGIES provides design, fabrication, materials, and installation services to the balanced cantilever construction process. Our engineering team supports the custom design of the traveler system to meet the needs of a specific project and bridge configuration. Complete system drawings and operation manuals detail all aspects of traveler operation for ease of assembly and safe operation. STRUCTURAL TECHNOLOGIES is ready to provide technical assistance and field supervision of traveler erection, launching, maintenance and dismantling. Our concrete construction forces can also provide an expanded scope of services to include the supply and installation of the reinforcing steel, formwork and post-tensioning systems.

 


 

About STRUCTURAL TECHNOLOGIES and VSL

STRUCTURAL TECHNOLOGIES, a Structural Group company, is the exclusive designer and manufacturer of VSL post-tensioning and  construction systems in the United States. VSL systems have a well-earned reputation for their quality, reliability, and durability - and have been used throughout the world since 1956 to build, repair, and strengthen bridges, buildings, tanks, and special structures. For information on VSL products outside of the United States, visit the VSL International website www.vsl.com.

With companies dating back to 1902, Structural Group is firmly committed to its ongoing mission of making new and existing structures stronger and last longer. Through its companies, Structural Group delivers turnkey solutions that integrate technology, engineering, and construction. Structural Group provides specialty contracting services through our construction companies and state-of-the-art proprietary products and engineering support services through STRUCTURAL TECHNOLOGIES.

Learn more about Structural Group and its member companies.

VSL is the registered trademark of VSL International Ltd.