LGT Ø 76
Light and fast
- 0.8 to 3.5 m, 180 or 145 mm head plate
- With an electric screwing machine
- Garden sheds, terraces, fences, play equipment
Ground screws
Ground screws: foundations without concrete
A ground screw is a steel tube with a thread that is screwed into the ground. No digging, no concrete and ready to load at once. We work with ground screws from Weenk Schroef Funderingen (WSF) in the Netherlands, up to Ø 140 mm and extendable.
What is a ground screw?
A ground screw has a continuous thread at the bottom of the tube. The thread grips the ground and carries the load through friction and the tip. At the top a steel head plate takes beams, posts or a frame.
For light and medium structures it is the fastest foundation there is: a few minutes per screw, and you build on the same day.
What are ground screws used for?
- Timber terraces and decks
- Pergolas, canopies and carports
- Garden sheds, log cabins and stores
- Garden offices, pool houses and tiny houses
- Solar panels on a frame in a field or garden
- Fences, signs and light steel structures
WSF ground screws
Data from Weenk Schroef Funderingen's technical drawings. All ground screws are made of S235JR structural steel.
| Series | Tube | Length | Thread | Head plate | Typical use |
|---|---|---|---|---|---|
| LGT | Ø 76 × 3 mm | 0.8 to 3.5 m | Ø 135 mm | Ø 180 mm (short: Ø 145 mm) | Terraces, pergolas, sheds, carports |
| PRO 89 · PRO 114 | Ø 89 or 114 × 5 mm | 1 to 3 m | Ø 180 mm | Ø 220 mm, M24 connection | Garden offices, tiny houses, extensions, solar panels |
| PRO 140 | Ø 140 × 5 mm | 2 m | Ø 180 mm | Ø 200 mm | Heavier loads and lateral forces |
| V series (extendable) | Ø 76, 89, 114 or 140 mm | base 1.5 to 3 m + extensions 0.5 to 2.5 m | per diameter | 350 or 750 mm high head | Where the bearing ground is deeper |
Which type of ground screw?
Click a type: the animation shows the ground screw under a typical structure, the steps explain why.
PRO Ø 89/114
The all-rounder
- Ø 89 or 114 mm, 5 mm wall, 1 to 3 m
- 220 mm head plate with M24 bolt
- Carports, canopies, garden offices, solar panels
PRO Ø 140
For heavy structures
- Ø 140 mm, the heaviest from WSF
- With an excavator and drive head
- Modular homes, extensions, chalets, steel structures
V-series (extendable)
Extendable in soft ground
- Ø 76 to 140 mm, with extensions
- Reaches the bearing layer
- Tiny houses and structures on soft topsoil
Which machine?
How we install ground screws
- 01
Setting out
Positions are set out to your plan, and we check for utilities.
- 02
Screwing in
By hand-held machine, compact tracked machine or excavator with hydraulic drive head, depending on diameter and access. Even through a narrow passage.
- 03
To level
All head plates are set to the same height with a laser.
- 04
Build at once
No curing time: the structure can go on the same day.
How much does a ground screw carry?
That depends mainly on the soil, the diameter and the length. Our pile calculator gives an indication in one minute for terraces, sheds, carports, garden offices and tiny houses. For buildings we work from the soil data in consultation with your engineer. We record the installation torque of every screw.
Install them yourself?
You can also buy ground screws from us and install them yourself, with a machine you rent from us. We will gladly give you a short instruction.
On site
Frequently asked questions
How deep does a ground screw go?
For buildings and structures that must not move, at least below frost depth, in practice 1.2 m or more. Short 0.8 m screws are only used for light applications such as fences.
Can a ground screw be removed?
Yes. You simply unscrew it, and it can be reused. No concrete is left in your garden.
Does it work in clay or on a slope?
Yes. In soft ground we choose a longer or extendable screw. On a slope the adjustable head brings everything back to level.
Product data: technical drawings from Weenk Schroef Funderingen (schroeffundering.nl).