From the bottom of the opening, on the right side, measure up to the mark you made.
Record the measurement on your worksheet.
Add that amount to 30 inches. This is your right side height measurement.
In this example that amount is 51 1/4 inches.
Added to 30 inches, gives a right side total height of 81 1/4 inches.
Repeat for the left side.Bookmark the permalink.