Our products

RADIX Ground Screws.

We install the UK's most trusted ground screw system. Every screw is hot-dip galvanised for a 25+ year design life and engineered to handle the loads your project demands.

Engineered for the ground beneath you

RADIX ground screws are manufactured from structural steel and hot-dip galvanised to EN ISO 1461 — giving them a design life of 25 years or more in most UK soil conditions. Each screw is sized and specified to match your ground conditions and structural load, so you get the right foundation first time.

The RADIX range

Four screw sizes to cover every project — from a garden room to a commercial solar array.

RADIX RS 76 light residential ground screw
Light residential

RADIX RS 76

Ø 76 mm800 mm – 2,000 mmUp to 15 kN

The RS 76 is our go-to screw for lighter residential structures. Compact enough for restricted access sites, it delivers reliable load capacity for garden rooms, decking, and fencing projects.

Typical applications

Garden roomsDeckingPergolasFencing
Material: S355 structural steelFinish: Hot-dip galvanised to EN ISO 1461
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RADIX RS 114 standard residential ground screw piles on pallet
Standard residential

RADIX RS 114

Ø 114 mm1,000 mm – 3,000 mmUp to 35 kN

The RS 114 is our most commonly installed screw — the workhorse of the RADIX range. It handles the majority of residential and light commercial projects with ease.

Typical applications

Home extensionsLog cabinsOutbuildingsLarger garden rooms
Material: S355 structural steelFinish: Hot-dip galvanised to EN ISO 1461
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RADIX RS 140 heavy duty commercial construction foundation
Heavy residential & commercial

RADIX RS 140

Ø 140 mm1,500 mm – 4,000 mmUp to 60 kN

For heavier loads and more demanding ground conditions, the RS 140 delivers the capacity needed for commercial projects, large solar arrays, and substantial structural builds.

Typical applications

Commercial buildingsLarge extensionsSolar rackingRaised structures
Material: S355 structural steelFinish: Hot-dip galvanised to EN ISO 1461
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RADIX RS 193 industrial piling foundation site
Commercial & industrial

RADIX RS 193

Ø 193 mm2,000 mm – 6,000 mmUp to 120 kN

The RS 193 is specified for the most demanding applications — large commercial builds, industrial structures, and utility-scale solar installations where maximum load capacity is required.

Typical applications

Large commercial buildsIndustrial structuresLarge solar farmsInfrastructure
Material: S355 structural steelFinish: Hot-dip galvanised to EN ISO 1461
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What every RADIX screw includes

Material

S355 structural steel

Finish

Hot-dip galvanised to EN ISO 1461

Design life

25+ years in typical UK soils

Installation method

Machine-driven, torque-controlled

Load testing

On-site torque verification

Documentation

Written specification report included

Not sure which screw you need?

Tell us about your project and we'll specify the right screw size, length, and spacing — included as part of your free quote.

Grand Screw Co.

Ground screw foundation installation for garden rooms, home extensions, log cabins, and solar arrays. No digging. No concrete. No mess.

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