We've put together some of those questions we hear most frequently. Don't hesitate to call us or e-mail us for more information!

What is an HCB? 

A Hybrid-Composite Beam (HCB) is structural member akin to a prestressed concrete or steel beam.  The FRP (Fiberglass Reinforced Polymer) outer shell provides shear strength and encapsulates the tension and compression elements.  The compression element is a concrete arch.  The tension element is steel reinforcement that runs longitudinally the length of the beam and ties the two ends of the concrete arch together.  Essentially the HCB is a tied arch in a fiberglass box where 90% of the strength is provided by steel and concrete.  The encapsulating FRP shell provides maximum protection from the elements for the steel and concrete ensuring an extended service life and minimal maintenance.

How Much Does it Cost?

HCB’s use steel and concrete to provide the bulk of the strength and are therefore cost competitive on a first cost basis with traditional structural members. 

Where can I use an HCB? 

HCB’s can be used wherever steel or concrete beams are used.  Currently we are manufacturing beams in the 30 foot to 80 foot span range, however span lengths up to 120 feet are possible.  

What about Accelerated Bridge Construction and HCB’s? 

Due to their lightweight, HCB’s can easily be incorporated into prefabricated bridge elements and systems (PBES)  and actually be set with lighter equipment.  The lower weight also means that and existing steel bridge can be replaced with HCB prefabricated bridge modules without adding additional loads to the substructure. 

How do I specify an HCB? 

Specifying an HCB for a project can be as simple as providing a note on the contract plans that allows the use of alternate superstructure members for an existing design.  If the HCB is right for your project, then HC Bridge can supply a generic specification that can easily be adapted to your project.


What types of loading can HCB’s be designed for? 

HCB’s were originally developed for heavy freight railroad loading, therefore almost any loading conventional beams are designed for, HCB’s can be designed for as well.  Such as: 

·         Highway Loads (AASHTO HS-20 or HS-25, Permit Vehicles, etc.)

·         Railroad Loads (Cooper E-60 or E-80)

·         Pedestrian Loads
 
What about deflection criteria?

HCB’s are a unique composite in that so much of the strength is derived from high modulus materials that deflection criteria (such as L/800 or L/1000 for highway bridges) are met.

How will HC Bridge help me design a HCB’s into my superstructure?

HC Bridge was founded by structural engineers with design, on-site construction and precast concrete bridge experience.  We can assist you in the design of the bridge superstructure or providing engineering firms that are familiar with the design of the HCB’s.  We can assist with drawings and/or specifications for inclusion in the contract documents.  Furthermore, since our background is bridge construction, we can assist with erection procedures and formulation of precast bridge modules using the HCB’s.
 

I’m a bridge designer and I have a project, what do I do next?

Call us or e-mail us!  We’ll be happy to assess your needs and determine if the project is right for an HCB.  We’ll make sure you have the right drawings and the right specifications to include in your contract documents.

I’m a contractor and I have a project where HCB’s would be a good alternative, what do I do next?

Call us or e-mail us your plans. We’ll look at them and determine what HCB solution is right for your project.  Then we’ll provide you with a design, drawings, cost estimate and anticipated production schedule.  If you use the HCB’s we’ll work with you until the bridge is in place.

I’ve got other questions, where can I get more information?

Call us or e-mail us!