Hello,
I need a small foundation, about 1.30 x 1.10 m (4.3 x 3.6 ft).
A device (weighing approximately 400 kg (880 lbs)) will be placed on it and fixed to the ground with four bolts. That’s why the foundation is necessary.
Both the device and the foundation will be exposed to weather conditions, and the device may get completely wet.
My current plan is to excavate the area, lay about 10 cm (4 inches) of gravel, and then pour around 15 cm (6 inches) of concrete. I was planning to skip the steel reinforcement mesh.
The whole thing would be formed with wooden shuttering, using a release agent for the formwork.
Are 10 cm (4 inches) of gravel and 15 cm (6 inches) of concrete sufficient? Or is that too much for the intended use?
Do I need to compact the gravel layer? I don’t really have access to a plate compactor.
For the concrete, I was going to use a 40 kg (88 lbs) bag of ready-mix concrete screed from a hardware store.
What are your thoughts on this plan?
Best regards
I need a small foundation, about 1.30 x 1.10 m (4.3 x 3.6 ft).
A device (weighing approximately 400 kg (880 lbs)) will be placed on it and fixed to the ground with four bolts. That’s why the foundation is necessary.
Both the device and the foundation will be exposed to weather conditions, and the device may get completely wet.
My current plan is to excavate the area, lay about 10 cm (4 inches) of gravel, and then pour around 15 cm (6 inches) of concrete. I was planning to skip the steel reinforcement mesh.
The whole thing would be formed with wooden shuttering, using a release agent for the formwork.
Are 10 cm (4 inches) of gravel and 15 cm (6 inches) of concrete sufficient? Or is that too much for the intended use?
Do I need to compact the gravel layer? I don’t really have access to a plate compactor.
For the concrete, I was going to use a 40 kg (88 lbs) bag of ready-mix concrete screed from a hardware store.
What are your thoughts on this plan?
Best regards
B
Bausparfuchs5 Feb 2023 13:32Don’t make it so complicated.
Use an earth auger to drill 4 holes. Then buy sewer pipe (KG pipe) and insert it into the holes. 80 cm (31.5 inches) deep, then fill the pipe with screed concrete and add some rebar inside. Done.
Of course, choose the holes according to the mounting points. But don’t expect too much from the earth auger.
Use an earth auger to drill 4 holes. Then buy sewer pipe (KG pipe) and insert it into the holes. 80 cm (31.5 inches) deep, then fill the pipe with screed concrete and add some rebar inside. Done.
Of course, choose the holes according to the mounting points. But don’t expect too much from the earth auger.
H
hanghaus20235 Feb 2023 14:03Bausparfuchs schrieb:
Don’t make it so complicated.
Use an earth auger to drill 4 holes. Then get some KG pipe and insert it into the holes.
80cm (32 inches) deep, then fill the pipe with screed concrete and add some rebar inside. Done.
Of course, choose the holes according to the fixing points. But don’t expect too much from the earth auger..For about 4 small foundations, even a spade will do. The KG pipes are only necessary in the upper part if the soil is not stable (mainly to prevent skin friction). The foundations should be only as big as the spade fits in.
W
WilderSueden5 Feb 2023 23:00I would have simply drilled 4 holes and poured in concrete. Then, shake it for a few minutes with an old batten inside and you’re done. The next day, secure the device with a sturdy angle iron.
I think that is too much effort. There are concrete block steps measuring 100 x 35 x 16 cm (39 x 14 x 6 inches), weighing 128 kg (282 lbs) each. Using three side by side, with the automation system on top, you get almost 800 kg (1,764 lbs) of weight, and the center of gravity is nicely low. I would say it won’t simply tip over.
H
hanghaus20236 Feb 2023 10:28Tolentino schrieb:
I think even that is too much effort. There are concrete block steps measuring 100 x 35 x 16 cm (39 x 14 x 6 inches), each weighing 128 kg (282 lbs). Place three side by side, put the automatic device on top, and you have almost 800 kg (1,764 lbs) of weight with a low center of gravity. I would say it won’t just tip over easily.What are you doing about the missing 10 cm (4 inches) / 25 cm (10 inches)?Similar topics