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Ensure the walls are vertical and the pit base flat. <strong>The</strong> mortar mix is made<br />
with 5li of Portland cement and 100li of pit sand (20:1). It works!<br />
Lay the bricks against the edge of the pit wall. <strong>The</strong> mortar is quite thin but<br />
sufficient to bond the bricks together. <strong>The</strong> internal diameter is 1.4m. Continue<br />
with this diameter for 1.4m<br />
A simple ladder can be made to enter and leave the pit. After 1.4m each brick<br />
course is stepped in (corbelled) by about 20mm per course. This corbelling<br />
continues till the brickwork is about 2 courses above ground level.<br />
10
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