Construction wall Elevation & Interior Design. Length of court between playing surfaces = 9750 mm Width of court between playing surfaces = 6400 mm Diagonal = 11665 mm Height above floor to lower edge of Front Wall Line = 4570 mm Height above floor to lower edge of Back Wall Line = 2130 mm Height above floor to lower edge of Service Line on Front Wall = 1780 mm Height above floor to upper edge of Board = 480 mm Distance to nearest edge of Short Line from Back Wall = 4260 mm Internal dimensions of Service Boxes = 1600 mm Width of all lines and the Board = 50 mm Minimum clear height above the floor of the court = 5640 mm NOTES 1. The Side Wall is angled between the Front Wall Line and the Back Wall Line. 2. The Service Box is a square formed by the Short Line, the Side Wall and two other lines marked on the floor. 3. The length, width and diagonal of the court are measured at a height of 1000 mm above the floor. 4. It is recommended that the Front Wall Line, Side Wall Line, Back Wall Line and Board are shaped so as to deflect any ball that strikes them. 5. The Board shall not project from the Front Wall by more than 45 mm. 6. It is recommended that the door to the court is in the centre of the Back Wall. 7. The general configuration of a Squash Court, its dimensions and its markings are illustrated on the diagram.