Featuring VSL® P-T

VSL® post-tensioning systems are technically advanced, industry proven and have a well-earned reputation for their quality, reliability, and durability

Progressive Collapse Protection

STRUCTURAL TECHNOLOGIES brings to its clients bonded post-tensioning (P-T) technology that can be designed to provide reinforcement continuity and redundancy to resist the spread of damage and minimize the risk of progressive collapse.

Versatility with External P-T

Post-tensioning is ideal for situations that require significant load capacity increases or deflection control. These versatile systems are often used to strengthen long-span beams and cantilevered members.

Adaptable Systems for Strengthening

Tstrata™ Enlargement Systems bond additional reinforced concrete to existing structures and may be customized for any application. These systems are ideal for situations that require improved strength and stiffness.

Featuring VSL® P-T

VSL Post Tensioning Products - the brand of choice worldwide for new and repair applications.

Solutions Integrating VSL® Post-Tensioning

Leveraging its high-strength properties and industry reputation for proven performance, STRUCTURAL TECHNOLOGIES has successfully incorporated VSL® technology into its strengthening-related products and systems including:

Exclusive Access to VSL® Technology

VSLVSL® post tensioning systems are available exclusively in the United States through  STRUCTURAL TECHNOLOGIES. VSL® products are technically advanced, industry proven and have a well-earned reputation for their quality, reliability, and durability.

VSL® branded products have been used throughout the world since 1956 to build, repair and strengthen bridges, buildings, tanks, and special structures. To learn more about VSL® products, specialized construction systems, and engineering support services - visit these websites:

VSL® is the registered trademark of VSL International Ltd.


State-of-the-Art Products. Engineered Solutions.

VSL® products are technically proven and have a well-earned reputation for their quality, reliability, and durability. To learn more about the systems below, visit www.vsl.net


Bonded Multistrand Systems

Bonded Multistrand Systems

A single multistrand tendon can hold up to fifty-five 0.5” or 0.6” strands encased in plastic or steel duct and is fully bonded using a high-performance grout. When bonded multistrand systems are used for large structural members such as beams and transfer girders, design advantages include increased span lengths and load-carrying capacity and reduced deflection.

VSLAB+® Bonded Slab Systems

VSLAB+ Bonded Slab Systems

VSLAB+® bonded tendons consist of prestressed strands contained in low profile ducts that are fully bonded to the surrounding concrete and used to provide continuous reinforcement in slabs. The corrugated ducts are filled with a high-performance cementitious grout that encapsulates the strands and achieve full bond with the surrounding concrete. For aggressive environments, fully encapsulated anchorage systems and ducts are available. Intermediate anchorages systems are used to provide continuity of prestress at construction joints.

Design advantages include the ability to limit loss of capacity to localized areas when post tension tendons are cut, increased span lengths and improved load-carrying capacities.


Unbonded Monostrand Systems

Unbonded Monostrand Systems

VSL Monostrand Systems are coated with grease as a permanent corrosion inhibitor and sheathed in extruded plastic to provide double corrosion protection, as well as prevent any bonding between the strands and the surrounding concrete. In aggressive environments, special sleeves are used to join the sheaths to the anchorages, and each anchorage includes a protective cap. Available in diameters of 0.5” (13mm) and 0.6" (15mm), these light, flexible monostrands can be easily and rapidly installed.
VSL® and VSLAB+® are the registered trademarks of VSL International Ltd.
Design & Engineering Support

Design & Engineering Support

Our skilled, dedicated professionals bring innovation to every project need. STRUCTURAL TECHNOLOGIES provides technical support during the planning and construction phases of projects. Our comprehensive range of services includes feasibility studies, cost estimates, preliminary designs, alternative proposals, detailing, project coordination, contractor consulting, and execution of the work utilizing VSL products and equipment.

Because each project presents a unique opportunity, STRUCTURAL TECHNOLOGIES teams with contractors, owners, and engineers to evaluate projects and determine optimal solutions. Our engineers have extensive experience in structural design and are active members of technical organizations such as the Post-Tensioning Institute (PTI), the American Segmental Bridge Institute (ASBI) and the American Concrete Institute (ACI).



Post-Tensioning Engineering Team Leader
John Crigler, P.E.

John Crigler, PE

With over 30 years of experience at VSL, Crigler is a recognized expert in post-tensioning. He is an active member of several industry associations including the American Segmental Bridge Institute (ASBI), Post-Tensioning Institute (PTI), American Society of Civil Engineers (ASCE) and American Concrete Institute (ACI).  In 2008, he received the ASBI Leadership Award given for outstanding leadership for the development of the segmental bridge industry. Crigler received his Bachelor of Civil Engineering from Virginia Polytechnic Institute and is a registered professional engineer in Virginia, as well as numerous other states.



STRUCTURAL TECHNOLOGIES' licensed engineering services are provided by Structural Technologies StrongPoint, LLC - A Structural Group Company, or through other licensed engineers.

Installation Support

Post-Tensioning Support

STRUCTURAL TECHNOLOGIES and VStructrual LLC, provide construction phase support services to ensure that VSL Post-Tensioning Systems are installed properly and will carry out their intended functions. We coordinate with builders to provide project-specific oversight, quality assurance and quality control.
Turnkey Investigate – Design – Build Solutions 

When paired with Structural Group's specialty contracting companies, including VStructural LLC, STRUCTURAL or PULLMAN - we provide our clients with a full range of design support, construction, and maintenance services from a single source of accountability. Together, we seamlessly deliver customized, cost-effective, and long-lasting solutions for structural challenges.





STRUCTURAL TECHNOLOGIES — A Structural Group Company

With member 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 member companies, Structural Group delivers turnkey solutions that integrate technology, engineering, and construction. Structural Group provides state-of-the-art products and engineering support services through STRUCTURAL TECHNOLOGIES and specialty contracting services through STRUCTURAL and PULLMAN

Learn more about Structural Group and its member companies.