Hello,
for the terrace design, a granite curb stone 30cm high (12 inches) will be installed as an edging, and granite pillars will be placed as a privacy screen. Between them, there will be wooden privacy panels.
Now my main question.
The columns are 3m long (10 feet). I want them to extend 2.20m (7 feet 3 inches) above the terrace surface. So, I want to set them 80cm (31 inches) deep in a foundation. How deep should the entire foundation be? Can I build the foundation in two parts so that I have the exact height for the base, place the columns on it, and then concrete around them? Since the columns are extremely heavy and not easy to lift for height adjustment.
for the terrace design, a granite curb stone 30cm high (12 inches) will be installed as an edging, and granite pillars will be placed as a privacy screen. Between them, there will be wooden privacy panels.
Now my main question.
The columns are 3m long (10 feet). I want them to extend 2.20m (7 feet 3 inches) above the terrace surface. So, I want to set them 80cm (31 inches) deep in a foundation. How deep should the entire foundation be? Can I build the foundation in two parts so that I have the exact height for the base, place the columns on it, and then concrete around them? Since the columns are extremely heavy and not easy to lift for height adjustment.
Hello Framkos
Of course, you can pour the foundation in two parts. Consider the base layer as a "cleaning layer."
80cm (31.5 inches) deep is definitely enough. That puts you below the frost line. Make the cleaning layer 5-10cm (2-4 inches) thick, let it cure for a few days, place the columns on it, align them, and fill with lean concrete. That will hold.
Steven
Of course, you can pour the foundation in two parts. Consider the base layer as a "cleaning layer."
80cm (31.5 inches) deep is definitely enough. That puts you below the frost line. Make the cleaning layer 5-10cm (2-4 inches) thick, let it cure for a few days, place the columns on it, align them, and fill with lean concrete. That will hold.
Steven
K
Knallkörper13 Mar 2017 12:24Maybe you can include some reinforcement in the blinding layer that sticks out upwards. Ideally, a few stainless steel wires, cavity wall ties, or something similar.
Thanks for your answers. Placing the reinforcement so it extends upwards will be difficult; let's see how I handle it.
Can I use gravel as drainage under the blinding layer, or is that unnecessary? Also, how should I mix the concrete—more like rammed concrete or flowing concrete?
Can I use gravel as drainage under the blinding layer, or is that unnecessary? Also, how should I mix the concrete—more like rammed concrete or flowing concrete?
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