GRIDFORM™ Concrete Bridge Deck Reinforcements
GRIDFORM™ is a prefabricated fiber reinforced polymer (FRP) double-layer grating, concrete-reinforcing system with integral stay-in-place (SIP) form for vehicular bridge decks.
The system consists of FRP plates bonded to the bottom grating of FRP double-layer grating panels, creating a bidirectional, lightweight panel for the grid construction of corrosion-free concrete bridge decks.
The lightweight GRIDFORM™ panel, which weighs only 4.7 pounds per square foot, is shop-fabricated in very large units that are limited only by shipping constraints to approximately 50 ft. by 8 ft.
When the GRIDFORM™ arrives on site, it is lifted with a single pick of a crane and placed directly in the bridge girders. The GRIDFORM™ panel is pre-engineered and detailed to enable rapid attachment to the bridge girders and subsequent concrete placement and forming. The anticipated lifespan of a GRIDFORM™ bridge deck is several times that of steel reinforced concrete bridge decks since FRP provides a corrosion-free reinforcement system for the concrete.
GRIDFORM™ Design Guide
The GRIDFORM™ Design Guide is provided as a service to structural engineers to determine if GRIDFORM™ can be used as an alternative to steel rebar as the internal reinforcement system for reinforced concrete bridge decks. The use of GRIDFORM™ by an engineering firm or installation contractor is governed by Strongwell's Terms and Conditions. Please review these terms and conditions prior to using the GRIDFORM™ Design Guide.
The GRIDFORM™ Design Guide requires Microsoft® Excel® version 2003 or 2007.
SAFSTRIP® Strengthening Strip
SAFSTRIP® is a pultruded composite strip that improves the strength of an existing structural member when mechanically fastened to the structure. The reinforcing strip has high bearing and longitudinal properties and is designed to strengthen the flexural capacity on the tension face of concrete girders, slabs and decks. Installation on bridges can occur without any interruption of service.
Low-Cost Rehabilitation with FRP Strips written by MARK D. WHITTEMORE, P.E., and ROBERT H. DURFEE, P.E., SECB DuBois & King, Inc., Bedford, New Hampshire as presented at the 2011 International Bridge Conference.
SAFSTRIP® is supplied in rolls and may be pre-drilled with holes at the required fastener spacing to receive fasteners. SAFSTRIP® measures 4" wide x 1/8" thick and is shipped in rolls up to 100 ft. long. SAFSTRIP® is designed to be easily field cut by the customer into shorter lengths using standard carpenter tools.
- Easy to install, no skilled labor necessary
- Minimal surface preparation is needed for installation
- Structure is usable immediately after installation
- Cost effective system for increasing load capacity of bridges
- Will not split or delaminate when drilled
SAFSTRIP® Design Software
The SAFSTRIP® design software is provided as a service to structural engineers to determine if SAFSTRIP® is a product that can be used to economically rehabilitate deteriorated concrete structures. The use of SAFSTRIP® by an engineering firm or installation contractor is governed by Strongwell's Terms and Conditions. Please review these terms and conditions prior to using the SAFSTRIP® design software.
SAFSTRIP® design software requires Microsoft® Excel® version 2003 or 2007.
SAFSTRIP® Carbon is a unidirectional, carbon fiber reinforced polymer (CFRP) comprised of high tensile strength and high modulus carbon fibers encapsulated in a thermoset resin through the pultrusion process. SAFSTRIP® Carbon is designed to be used as an externally applied reinforcement for strengthening concrete, timber, and masonry structures. A peelply fabric is adhered to the plate that, when removed, leaves a prepared bonding surface for adhesion to a prepared substrate.
- Structural Strengthening
- Seismic Strengthening
- Damage to Structural Parts
- Change in Structural System
- Design or Construction Defects
- Load Increases
- Serviceability Improvements