Our ground screws vary in both length and diameter, with our “everyday” range starting at 76mm diameter and fixed lengths of 1050mm, 1250mm, 1550mm and 2050mm.
We also have 89mm, 114mm and 140mm diameter screws in fixed lengths, and we have a range of extensions available for our 89mm and 114mm ground screws, allowing installation to any depth required to reach a load-bearing ground.
To determine what length and depth of ground screws are needed for a project, ground conditions and the load-bearing capacity need to be considered. Ground levels also need to be taken into account, where we will often use a variety of lengths in an installation to bring up ground that is uneven or sloping, ensuring each screw has an equal or greater load-bearing capacity than required.
The surrounding area may also come into consideration when selecting the right ground screw for your project. For example, if the site is subject to potential flooding or if there are trees with underlying roots nearby.
Finally, it is essential to install ground screw foundations to a depth that will not be subject to ground heave – the upward movement of the ground usually associated with the expansion and contraction of soils when wet and drying out.
When required, we can complete a pre-installation site survey, checking the ground conditions for suitability and ensuring the correct size of ground screws are specified for your project.
If you have a project you’d like to get off the ground, get in touch for some free advice.
Download our brochure
Learn more about our ground screw foundations and their many time-saving and environmentally-friendly benefits.