Testing to ensure a strong fence post anchor
A simple and easy-to-use product is great. But FenceFins also proved they were a strong fence post anchor.
A variety of tests were commissioned to assess FenceFins strength and ability to keep a fence post firmly in place. FenceFins passed all the tests with ease!
Below are some of the tests that we ran. You can also see some videos (a bit less formal!) in the panel. Both the testing and the videos demonstrate FenceFins really are such a strong fence post anchor.
1. Load testing
Engineer-led tests compared FenceFins with various sizes of spike fixing. The testers applied load forces equivalent to Force 8 winds and then measured how well the posts held. Force 8 – that’s a gale. (See more on the Beaufort Scale at the Royal Meteorological Society).
Clay soils are more difficult to compact than other types of soil. So the testers chose a clay-rich soil as it would be the least favourable for FenceFins, immediately after installation. Clay soils are also the most favourable to spikes because these do not have the soil compacted back around them at installation.
So, if FenceFins could outperform spikes in these difficult conditions that would certainly prove their ability as a strong fence post anchor.
After installing the posts, the testers used a winch to apply load to each one. They applied the load as a horizontal force at a height which corresponded to the centre of a 6ft tall panel. This simulates the effect of wind on a fence panel.
The exact load was measured by a load cell attached to the post. A laser then measured the deflection of the post.
Some deflection under load is normal because the wood itself will have some ‘give’.
But the tests showed that with FenceFins there was 20% less deflection than in the posts held with spikes. At Force 8 equivalent loads the deflection with FenceFins was only 2º – an amount barely visible to the human eye.
2. Site testing – more great results
Several sites around the UK were selected by SteadyPost for testing in real gardens with real weather. Four years on (2017) and all the fences continue to hold really well.
The Land Trust also ran a successful trial of FenceFins at their windiest site, Portland Bill in Dorset. There, a fence they installed with FenceFins withstood the winds of the 2016 winter which included Storm Katie!
FenceFins get stronger over time
Over time the soil naturally settles.
As the ground settles the holding strength of FenceFins improves even further. The effects can be seen in just a few weeks and is true for all soil types.
Unlike FenceFins, other post anchors will never be stronger than the day of installation.