JD on Facebook

How to Measure Round Rail Size

This trick will show you how to accurately measure tubular railing O.D. if you don't happen to have a pair of calipers handy.

measuring tool

Step 1

Using a ruler on heavy paper, card stock or the bottom of an envelope, accurately measure and mark parallel dots to the size of rail you think you have as shown. If you think you have 1.0 inch railing, mark the dots exactly 1.0 inch apart.

build grid for measuring tool

Step 2

Using a ruler, accurately draw lines between the dots as shown.

cut notch for measuring tool

Step 3

With a razor or scissors, carefully cut along the lines, fold back the cut area and insert on your railing. If the fit is incorrect, repeat from step 1, adjusting either up or down until you get the correct rail size.

TotalBoat Blogs Live Tech Support