Road Guardrail

The project-specification road product, not the standardised one

A road edge is often specified by the authority that owns it, and that detail rarely matches a published beam system. This product exists for exactly that case: barrier units for a roadside or a median, beam and rail sections, posts and fixings, all made to the project specification or to the standard the client follows. What is quoted is what the drawing shows, in the sections and lengths the drawing shows them.

It is important not to confuse it with the W-Beam Steel Road Guardrail. That product is the standardised corrugated-beam system published against JT/T 281—2007, with fixed panel, beam, plate, post and per-kilometre figures. This product cites no such standard and publishes no such figures: the two have separate specifications, separate drawings and separate quotations, and a beam from one is never supplied against the other's drawing. If your specification names JT/T 281—2007 or a corrugated beam with a stated panel length and post spacing, the W-beam page is the right one; if the drawing shows a municipal barrier, a median unit or a rail section to the authority's own detail, this is the page.

What the two share is the purpose. Both take a vehicle impact and guide it along the line rather than through it; the difference is where the geometry comes from. Where a pedestrian rather than a vehicle has to be separated from the carriageway, the zinc-steel perimeter railing is the rail for that job.

Road guardrail — specification by drawing

There are no published figures for this product, and that is the defining difference from the W-beam system. Section sizes, unit lengths, plate thickness, post section, post spacing and finish are all read from the drawing and stated on the quotation, so nothing on this page can be mistaken for a standard dimension.

What "to the project specification" covers

• Barrier units and rail sections. Roadside and median units, beam and rail sections, made in the profile the drawing shows rather than in a published one.
• Posts and fixings as part of the line. The post and its base detail are quoted with the units, against the ground the run stands on.
• A clean separation from the W-beam system. The two products are quoted, specified and drawn separately, and neither is supplied against the other's standard.
• No borrowed dimensions. Nothing on this page is presented as a standard figure, because the product is defined by the drawing.
• One reading of the same need. A vehicle is guided along the line rather than through it — the same purpose as a beam barrier, reached from a different specification.
• Works alongside the rest of the range. Median screens, railing and hoarding are quoted from the same workshop on one programme.

The drawing is the specification

Send the drawing or the standard the project follows, with the run length, the unit positions, the post detail and the finish. From those we confirm in writing the unit and section build, the post and fixing, the quantity and the packing. Nothing is taken from a catalogue, because there is no catalogue dimension set for this product — that is the point of it.

Two things need saying plainly, because they are where this page differs from the W-beam page. First, if the specification names JT/T 281—2007 or describes a corrugated beam with a stated panel length and post spacing, do not order from this page: we quote that as the W-beam product, from its published figures. Second, this page will not quote a dimension it has not been given. A municipal barrier detail that arrives as a drawing is quoted from the drawing; one that arrives as a description is returned with the questions that the drawing has to answer.

Bundled by type, loaded to a plan

Barrier units, beam and rail sections, posts and fixings are bundled by type for shipping, so a bundle can be identified on site from its marking rather than by opening it. Steel barrier is heavy for its volume, so the loading plan is built on the weights the drawing produces. The exact packing method and bundle layout are confirmed per specification with the loading plan.

Four questions, answered from this page

Is this the same as the W-beam steel road guardrail?

No. They are two separate products. The W-beam Steel Road Guardrail is the standardised corrugated-beam system published against JT/T 281—2007. This Road Guardrail is made to the project specification from barrier units, beam and rail sections, posts and fixings. Separate specifications, separate drawings, separate quotations.

Why are there no dimensions on this page?

Because none are published for this product. Section sizes, unit lengths, plate thickness, post section, post spacing and finish are read from the drawing and stated on the quotation.

Can you quote to JT/T 281—2007 from this page?

No — that standard belongs to the W-beam product. If your specification names it, tell us and we quote the W-beam Steel Road Guardrail from its published figures instead.

What do you need to quote?

The drawing or the standard the project follows, the run length, the unit positions, the post and base detail, the finish and the destination port. The build and the quantities are confirmed in writing from those.

Can it be supplied with railing or median screens?

Yes. Railing, median screens and hoarding are made in the same workshop and can be quoted as one programme with one loading plan.