What are Straightcurve steel raised beds?

Straightcurve® raised beds are modular steel raised garden beds supplied by F.H. Brundle. They come in two ranges, Flex and Rigid, in weathering steel or galvanised steel, and are used to build curved or straight flower beds, boundaries and stepped multi-level landscapes in residential and commercial spaces.

What is the difference between Straightcurve Flex and Rigid raised beds?

Straightcurve® Flex is a fully flexible system that bends by hand into sweeping curves and circular layouts. Straightcurve® Rigid gives crisp straight lines or subtle curves, and locks together with corner pieces and pre-attached connector plates to form square and rectangular beds. Both ranges offer the same adaptability and the same finishes.

What sizes do Straightcurve raised beds come in?

Straightcurve® Flex and Rigid raised bed panels are 2160mm long and available in 240mm, 400mm and 560mm heights (the 560mm panel is listed as 540mm x 2160mm). Corner sections measure 250mm x 250mm. Each size is available in weathered steel and galvanised steel.

What finishes are available: weathering steel or galvanised steel?

Straightcurve® is available in weathering steel (also called Corten steel) and hot-dip galvanised steel. Weathering steel forms a stable protective rust patina that removes the need for painting. Galvanised steel is protected by a zinc coating that corrodes in place of the base metal. Both are designed to last for decades without painting.

Can Straightcurve galvanised steel be painted or powder coated?

Yes. The galvanised steel finish of Straightcurve® is suitable for painting and powder coating, so an installation can be customised to a chosen colour.

Do Straightcurve raised beds need welding or specialist tools to install?

No. Straightcurve® installation needs no welding, no pre-rolling and no specialist tools. Anchoring spikes and internal stabilisation brackets drive into the sub-base, so concrete footings are not required, and one person can align, pin and fill a bed.

Do Straightcurve raised beds have a safe top edge?

Yes. Straightcurve® raised beds have a rolled-top safety edge of 5 to 7mm.

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Straightcurve® is the UK’s only high-end modular steel landscaping range.

Modular Steel Raised Garden Beds

Layer and raise with quality steel raised beds – curate a garden or outside living space with stunning curved or superbly straight lines. Create layered landscapes and stepped, multi-level spaces that will stand the test of time.

Order Straightcurve Flex Raised Beds

Fully flexible raised bed system ideal for creating big sweeping curve flower beds and multi-level landscapes.

Order Straightcurve Rigid Raised Beds

Rigid provides crisp, straight, or subtle curved, raised beds and boundaries with the same adaptability as Flex.

Order Straightcurve Flex Garden Edging

Fully flexible raised bed system ideal for creating big sweeping curve flower beds and multi-level landscapes.

Order Straightcurve Rigid Garden Edging

Rigid provides both crisp, straight, or subtle curved, edges and boarders with the same adaptability as Flex.

Range Available in…

Find out about these finishes

Straightcurve® is available in two finishes; Weathering Steel and Galvanised Steel

Weathering Steel

Weathering steel (sometimes referred to as Corten steel), is an intentionally oxidised steel alloy. It forms a stable, protective layer of rust when exposed to the elements, eliminating the need for painting while providing long-term structural durability.

Unlike standard carbon (mild) steel, which continues to rust until it degrades structurally, weathering steel creates a dense surface oxidation layer (a patina). This patina seals the underlying metal from moisture, oxygen, and atmospheric pollutants ensuring structural integrity for decades, even in damp environments. Refer to the Straightcurve® longevity guide for more information.

Galvanised Steel

Protected by a hot-dip zinc coating, galvanised steel offers superior weather resistance and long-term durability without ever requiring a coat of paint. Where standard carbon steel breaks down through destructive rusting, galvanised steel relies on sacrificial protection—the zinc shell corrodes in place of the base metal, continuously sealing it against dampness, air, and soil pollutants. The result is total structural integrity built to last for decades.

This finish is also suitable for painting and powder coating, allowing you to customise your Straightcurve® installation.

Straightcurve® Flex

straightcurve garden edging and raised beds

Order Flex Raised Beds

240mm Raised Beds

240mm x 2160mm Curveable Steel Edging – Weathered Steel & Galvanised Steel options

400mm Raised Beds

400mm x 2160mm Curveable Steel Edging – Weathered Steel & Galvanised Steel options

560mm Raised Beds

540mm x 2160mm Curveable Steel Edging – Weathered Steel & Galvanised Steel options

Corner Pieces

250mm x 250mm Corner Sections for 100mm & 150mm Variants Weathered Steel & Galvanised Steel options

Straightcurve® Rigid

straightcurve zero flex steel garden edging for landscaping

Order Rigid Garden Edging

240mm Raised Beds

240mm x 2160mm Straight Steel Edging – Weathered Steel & Galvanised Steel options

400mm Raised Beds

400mm x 2160mm Straight Steel Edging – Weathered Steel & Galvanised Steel options

560mm Raised Beds

540mm x 2160mm Straight Steel Edging – Weathered Steel & Galvanised Steel options

Corner Pieces

250mm x 250mm Corner Sections for 100mm & 150mm Variants Weathered Steel & Galvanised Steel options

View the entire edging range

Uniquely Simple Installation

We believe that Straightcurve is the simplest modular raised bed system available anywhere in the UK. This belief is backed by hundreds of satisfied Landscapers and Customers who come back to the system time and time again.

• No Welding

• No Pre-rolling

• No Specialist tools

Find out more

Straightcurve modular raised bed systems, expertly combining the dynamic Flex and structural Rigid ranges, completely redefine what is possible in modern garden design by bridging the gap between heavy commercial engineering and accessible DIY landscaping. Rather than relying on bulky timber sleepers that inevitably rot, warp, or require complex mitre cuts, this system utilizes a clever interlocking framework designed to withstand high soil pressures whilst maintaining razor-sharp architectural lines. Available in modular heights up to 560mm, the beds feature a signature 5 to 7mm rolled-top safety edge. Whether you choose pre-galvanised steel or heavy-gauge weathering steel that develops a stunning, self-healing russet patina over time, these beds are engineered to outlast traditional materials by decades without fading, cracking, or requiring chemical treatments.

The magic of the system is truly noticeable during installation, transforming what is typically a back-breaking weekend project into a swift, satisfying assembly. The Rigid panels lock seamlessly with precision-engineered corner pieces and pre-attached connector plates to create immaculate, plumb squares and rectangles, while the Flex panels bend smoothly by hand to form elegant, sweeping curves or organic circular layouts. Because the panels utilise heavy-duty anchoring spikes and internal stabilization brackets that drive firmly into the sub-base, there is no need for concrete footings, specialized masonry tools, or welding. A single person can easily align, pin, and fill a striking, professional-grade raised bed in a fraction of the time of conventional methods, delivering a pristine, high-end finish that looks as though it was installed by elite landscape architects (even when its not).