Thrie-Beam Highway Guardrail

Gregory Highway Thrie-Beam guardrail is produced in standard AASHTO 12'-6" or 25'-0" lengths. Custom lengths and custom post-hole spacing are available on request. Our Thrie-Beam highway guardrail is offered in 10-gauge or 12-gauge steel, four types of finishes, and in pre-curved shapes as part of our commitment to value.

Thrie-Beam Barrier Galvanizing Process

We begin with prime steel that matches requirements for quality, physical properties, and chemistry. A multi-stage cleaning process prepares the metal for galvanizing on our own Modified Sendzimer Continuous Galvanizing Line. Production then pierces the steel with holes and/or slots (to either industry standards or project specifications) and then roll-forms it into the Thrie-Beam profile, creating new sections of guardrail, in one continuous process.

Gregory continuously galvanized steel assures a consistent finish while eliminating sharp points and uneven zinc build-up that is typically found in hot-dip galvanized products. While most Gregory guardrail is supplied in galvanized finish, it is also available in black, painted epoxy coatings, or weathered steel as alternative finishes for aesthetic applications.

 

Thrie-Beam Guardrail Meets AASHTO Specifications

Our guardrail is manufactured to AASHTO specifications in M180 Class A or B, and finish types 1, 2, 3, or 4. Every piece of Gregory Thrie-Beam guardrail is stamped with a brand registration that is repeated throughout the entire length of the rail.

Gregory Stamping Code:

1. Manufacturer: GH=Gregory highway
2. AASHTO Specifications
3. Mill Heat Number Code
4. Galvanized Lot
   • 09 = Week (9th week)
   • 07 = Year (2007)
5. Class
   • Class A = 12 gauge
   • Class B = 10 gauge
6. Type
   • Type 1 = Zinc coated 1.8 oz/sq. ft. (550 g/sq. m.) minimum single spot
   • Type 2 = Zinc coated 3.6 oz/sq. ft. (550 g/sq. m.) minimum single spot
   • Type 3 = Uncoated Steel
   • Type 4 = Weathering Steel