Gradient calculator6/12/2023 ![]() You might decide that your pipe needs to be 1 m down from this line. Step 6 – You can now use your tape measure or spirt level to set out the gradient from this line. ![]() Following this you should now have a string line set to the correct fall gradient. You will need a tape measure to measure down from the mark that you made on the peg in the previous step. Step 5 – Now, using your the fall distance you previously calculated, you will bring down the string line on one of the pegs. ![]() This calculator will then give you the vertical distance down / up. H ere you can plug in your distance between your stakes and the ratio of the pipe. You can now use the calculator above “How to Calculate Pipe Rise / Fall”. You should know the fall ratio of your pipe, this could be 1:40, 1:100 etc. Step 4 – You now need to calculate the fall (drop) of your gradient over that length. Step 3 – Using your 30m tape, measure the distance between of the string you have just placed. This may take some time! Once you have done this use your permanent marker to mark the height of the string line at each peg. Level the line all the way along as best you can and ensure it is taught. Take the string line to the other stake and using your spirit level try to get the line as level as possible. Step 2 – Using your string line, nail the string at the midway point on the first stake. Using your mallet, bang the rods into the ground so they are nice and vertical and solid in the ground. Step 1 – Start by placing your timber pegs at the start and end of your drainage run.
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