4.1 Construction of Court Walls
4.2 Strength of Court Walls
4.3 Deflection of Court Walls
4.4 Player Impact
4.6 Wall Finishes
4.7 Color of Court Walls
4.8 Reflectance of Walls
4.9 Ball Rebound from the Court Walls
4.10 Joints in Playing Surfaces
4.11 Flank Wall Panels
4.12 Wall to Wall & Wall to Ceiling Junctions
4.13 Wall to Floor Junctions
4.1 Construction of Court Walls. Each wall of the court shall be
of the same construction over the whole of the playing area except
as allowed under Section 1.5 -- Camera Panels.
4.2 Strength of Court Walls. The walls of the court, and all
components in them, shall be capable of withstanding all the
stresses which may be placed upon them in normal play as a result
of the impact of balls, racquets and players, and shall not suffer
any permanent or temporary damage as a result of these impacts.
4.3 Deflection of Court Walls. The walls of the court shall not
deflect under the impact of the ball in normal play to such an
extent or in such a manner that the rebound of the ball is
4.4 Player Impact. The walls may deflect under the impact of
players if it is necessary for their structural integrity that they
should do so. The amount of any such deflection shall not exceed
the appropriate limit specified below following an impact
equivalent to that of a human body with a mass of 200 pounds and a
coefficient of absorption of 47%, traveling at the moment of impact
at a speed of 10 feet per second and striking the wall at right
angles to it over an area of not more than 5.4 square feet at a
height to the center of the impact area of 4.8 feet (plus or minus
2 inches) in the middle third of any panel on the wall or, in case
of a wall of homogenous construction over the whole of its area, in
the middle third of the wall: a. in the case of glass walls: 1¼
inch at the center of the impact area; b. in the case of all other
walls: ¼ inch at the center of the impact area.
4.5 Return. Any wall which deflects as allowed by section 4.4
shall return to its original static position within one second of
the initial impact and shall suffer no temporary or permanent
damage as a result of the deflection.
4.6 Wall Finishes. All playing walls of the court shall have a
hard smooth finish.
4.7 Color of Court Walls. All playing surfaces of the court are
recommended to be of the same color and reflectance unless glass is
used. If the back wall is a solid wall, it shall be of the same
color and reflectance as the front and side walls.
4.8 Reflectance of Walls. The average reflectance of the front
and side walls shall not be less than 80% at any point when in a
4.9 Ball Rebound from the Court Walls. The ball shall rebound
true on striking all parts of the playing walls. The ball rebound
shall be consistent over the whole area of each wall.
4.10 Joints in Playing Surfaces. Any open joint in the finish of
a wall for panel construction shall: a. not deflect the rebound of
the ball in any way; b. not be larger than 3/32 inch in the plane
of the wall surface; and c. be constructed in such a manner as to
ensure that adjacent areas of the finish cannot move relative to
one another at right angles to the plane of the wall following the
impact of the ball, a racquet, or a player, except in the case of
doors in glass walls as allowed by paragraph 37 of this
4.11 Flank Wall Panels (Optional). The plane of the side walls
of the court can be extended behind a glass back wall for a
distance of not less than 12 inches and to a height of not less
than 8 feet above finished floor level inside the court by means of
fixed or moveable panels of the same color and texture as the side
walls of the court.
4.12 Wall to Wall and Wall to Ceiling Junctions. There shall be
no protrusions of any kind into the court at the junction of one
wall with another, other than a caulking bead having the same color
as the court walls and ceiling for aesthetic appearance.
4.13 Wall to Floor Junctions. There shall be no protrusions of
any kind into the court at the junction of any wall of the court
with the floor. An expansion joint may be provided at the junction
of any wall of the court with the floor but is recommended not to
exceed 5/8 inch of any dimension or any point.