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Calculate Rope Length for Square Posts — Cut Rope to Length

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How to Install a Rope Handrail Along a Stair Wall · Step 4 of 7

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To determine the required rope length for square posts where the rope will pass through drilled holes, first measure the total length of the run. Then, account for the desired sag between posts. To measure the sag, use a small rope, string, or a flexible tape measure. Pull it taut between two posts, then let it relax to achieve the desired sag, noting the extra length required. For the example project, about 3 extra inches of rope were needed per section for sag. If your railing includes corners, plan to end each run of rope at the corner post and start a new piece for the next section. If you are using natural fiber manila rope, add 10 to 15 percent to your calculated length to account for shrinkage when the rope gets wet. When ordering from Right Rope, they can cut each piece to your exact specifications.

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