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Groundworks for Tray & Post sign
I have a 3000mm x 1260mm Tray sign on 100mm square posts with the base 280mm above the ground.
What sort of groundworks would be recomended for this?I have not erected such a large panel & post before and only ever done small free standing poles into a couple of bags of postcrete.
I am getting the sign from Ashby who say their software for the construction automatically works out that the sign itself is of sturdy enough construction for windloading at the heights stipulated but they do not give any advice as to the method of groundworks other than the recommended depth of the poles below ground based on 2/3 above ground and 1/3 below ground.
What & how do others calculate the specs and construction required ? -
4 Replies
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Stu
depends on ground structure but i would be looking @ 600mm to 900mm in ground with hole circumference of 450mm to 600mm but as i say depends on ground structure. I will say this is my thoughts on it and can say that in 15 years never had a sign fall overKev
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Here is an old UKSB tutorial on this type of thing… hope it helps you some.
https://www.uksignboards.com/topic17579.html -
Depending on the ground type, apx 900mm to 1000mm in the ground and apx 400mm square holes and at least 75% filled with a concrete (and/or rubble) mix. Avoid ‘trenching’ whenever possible as hundreds of kilos of concrete can quickly turn into thousands.
If you have the time, sink a couple of PVC pipes into the ground at the correct pitch and let it go off. Then erect the sign into the pipes and backfill with postcrete…make sure they fit and check, check and check again the pitch is right!!!
Dave
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Thanks for all the replies & suggestions.
It will be a great help
Stuart
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