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 2: Craft 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.