Boning rods are the quickest and easiest way to create a fall for pipe work or drainage, here I have used boning rods to create a falling base for an aggi drainage pipe beside a retaining wall.
1. First I made 3 boning rods by making a large "T" shape out of timber,(can pretty much be made out of any scrap timber laying around) ensuring they were all the same length.
2. 1 boning rod is driven into the ground at one end of trench, 1 boning rod held by a "spotter" at the other end of trench, the last boning rod held is moved along trench to find the ever reducing/increasing heights.
3. Making my way along the trench I made a series of height pads which will be used to screed a continuous sloping bed for the aggi pipe to lie on.
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