HIGHWAY GUARDRAILS
Thrie-Beam Guardrail
A three-corrugation steel beam for highway guardrail systems. Review the square-post assembly and panel models, then add your project requirements to an enquiry.
Installed Thrie-Beam · application reference
Hot-dip galvanized · Thrie-Beam Guardrail
Square-post assembly reference. Confirm the finish and connections by project drawing.
The photo is an application reference. The assembly below illustrates a square-post arrangement; quoted connections follow the confirmed project drawing.
BUILD YOUR REQUEST
Configure your Thrie-Beam guardrail
01 Surface finish or OEM
02 Panel thickness square-post reference
03 Steel grade confirm by drawing
04 Post section
Your choices are added to the enquiry page automatically. Attach your project drawing there to confirm the panel, blockout and hole pattern.
Product overview
THREE-CORRUGATION PROFILE
A taller panel profile for the specified system.
Thrie-Beam guardrails use a three-wave steel panel, posts, blockouts and fasteners as one installed system. This page illustrates the square hollow post arrangement. Panel model, post spacing, foundation, connection and end treatment must be selected together from approved project documents.
Reference: GB/T 31439.2—2025 supplied in the guardrail knowledge base. The assembled system determines performance.
How the guardrail system works
CONTACT / LOAD TRANSFER / REDIRECTION
How force passes through the system
On contact, the three-wave beam and its connections transfer load toward the posts and foundation. The approved complete system may deform and help guide the vehicle along the barrier.
Concept diagram only; it is not a crash-test result or a stated containment level. Check the tested system and installation conditions for project performance.
Open full-size diagram ↗Installation & assembly reference
THRIE-BEAM / SQUARE POST / BLOCKOUT
See how the main parts connect.
The three-wave panel overlaps at a bolted splice. A matching blockout separates the beam from each square steel post, with project-specified post fasteners and caps.
- Confirm the selected P-RTB panel model, hole pattern and post layout.
- Set square hollow posts to the approved spacing and foundation detail.
- Install the specified square-post blockouts and align the three-wave panels.
- Complete splice and post connections; check end treatment against the project drawing.
PST square post is listed as 130 × 130 × 6 mm in the supplied standard. Exact BF-series blockout type, bolts, holes and installation sequence require the approved drawing.
Thrie-Beam models & specifications
All nine RTB panel entries in GB/T 31439.2—2025 are listed separately below. P-RTB is our display code for the corresponding RTB standard model. The first five entries suit square posts; the remaining four suit steel pipe or H-section posts. Dimensions are millimetres; confirm the exact drawing before quotation.
| PIPESD model | Panel length | Width | Wave height | Thickness | Post / use |
|---|---|---|---|---|---|
| P-RTB00-1 | 8,320 | 506 | 85 | 4 | Square post · extended |
| P-RTB01-1 | 4,320 | 506 | 85 | 4 | Square post · standard |
| P-RTB02-1 | 3,320 | 506 | 85 | 4 | Square post · standard |
| P-RTB03-1 | 2,320 | 506 | 85 | 4 | Square post · adjustment |
| P-RTB04-1 | Under 2,320* | 506 | 85 | 4 | Square post · adjustment |
| P-RTB00-2 | 8,320 | 506 | 85 | 3 / 4 | Pipe / H post · standard |
| P-RTB01-2 | 4,320 | 506 | 85 | 3 / 4 | Pipe / H post · standard |
| P-RTB03-2 | 2,320 | 506 | 85 | 3 / 4 | Pipe / H post · adjustment |
| P-RTB04-2 | Under 2,320* | 506 | 85 | 3 / 4 | Pipe / H post · adjustment |
* Adjustment-panel length follows project design. “-2” rows are alternative pipe/H-post models, not the square-post assembly illustrated above. Model codes do not imply stock availability.
Square postPST, 130 × 130 × 6 mm in the supplied standard; matching blockout and connection by project drawing.
Base steelCarbon structural steel meeting at least Q235 requirements; Q345 when specified for the project.
Surface finishGalvanized / powder-coated / galvanized + powder-coated; confirm coating requirements by project drawing.
Components & supply details
PANELS / SQUARE POSTS / CONNECTIONS
Specify the matched parts.
A Thrie-Beam order may include three-wave panels, square hollow posts, compatible blockouts, splice and connecting bolts, caps and end treatments. Hole and connection details depend on the selected model and approved system drawing.
- P-RTB panel model, length and thickness
- PST square post section and layout
- Matching blockout, bolts and end treatment
- Galvanizing, coating or drawing-based finish
Standard composition sketch for reference. Some numbered alternatives apply to other post systems; supply scope follows the agreed drawing.