Measuring the Radius of Rounded Corners: A Step-by-Step Guide

For a mattress to fit perfectly, especially in spaces like caravans or motorhomes where rounded corners are common, it’s crucial to measure the radius accurately. Here is a simple step-by-step guide to help you measure the radius of rounded corners on your bed base:

Step 1: Gather Materials

You will need a flexible tape measure, a large piece of paper (or cardboard), a pencil, and a ruler or straight edge.

Step 2Craft Your Corner Template

  1. Slide the cardboard or paper beneath the mattress corner you're sizing up.
  2. Gently guide your pencil along the corner's curve to sketch a clear outline.
  3. Snip along the sketched curve to cut out your corner template.

Step 3: Draw a Right-Angle 'Square' Corner

On a separate piece of paper, draw a perfect right-angle corner; this will assist you in identifying the points where the curves of the corner begin.

Step 4: Aligning the Template with the Square Corner

  • Position your curved template on top of the paper featuring the right-angle corner outline.
  • Locate the starting points of the curve on both the length and the width of the corner template.
  • Mark these starting points as point A (for the length) and point B (for the width).

Step 5: Determining the Radius

  • Measure the distance from point A, where the curve begins, to the corner of the right angle; this is the radius along the length.
  • Repeat the measurement for point B to the corner of the right angle; this is the radius along the width.

Step 6: Record and Double-Check

Note down your measurements accurately and and revisit step 5 to ensure accuracy in your initial readings.