Radius Measurement Instructions
Using a carpenter's square:
The Radius of your hot tub is the distance from the place where the square touches the hot tub before it starts curbing.
Note: You may want to consider a slightly smaller radius, with a smaller radius due to the change in the curve it may extend the cover of the spa out further past the corner of your hot tub. For example: 1/2" less radius extends the hot tub cover 1/4" further.
If you don't you don't have a carpenter's square handy:
Using pieces of wood, cardboard or essentially anything with a straight edge, measure the distance for your hot tub's radius with a ruler or a tape measure.
You can also print our our Corner Radius Measurement Guide here: Corner Radius Measurement Guide