A.S.B.A. Guidelines for Tennis Court Construction

Section 2.I. – Hot Mix Asphalt Tennis Courts

1.0 Slope Requirement

All excavating, filling and grading requirements and compacting work of the subbase should be performed so that the finished subgrade is 4″-6″ above the surrounding ground and slopes not less than 0.83% (1:120) and not more than 1% (1:100). Each court must slope on a true plane, preferably from side to side (but from end to end or from corner to corner are also acceptable), or in the shortest direction for good drainage and water runoff. The court should never be sloped from the net line to the baseline, from the baseline to the netline, from the sides to the centerline or from the centerline to the sides.

2.0 Perimeter Edging
A. Curbing (for decorative purposes)
An optional edging of brick, concrete, steel or treated wood may be installed around the entire perimeter of the court area. Sections may be left open to allow trucks and other equipment to enter and leave the court area, until other work specified herein has been completed. Top elevation of the edging should be approximately 1/2” below the finished grade level and the court’s surface should be tapered out to meet it.
B. Apron
The overall dimensions of an individual court should be 61’ x 121’ to provide a 6” apron around the court or 62’ by 122’ to provide a 1’ apron around the court. This additional footage helps prevent vegetation intrusion from the perimeter, facilitates landscape maintenance and adds to the overall cosmetics. Fencing should remain 60’ by 120’ and should be installed after paving and prior to surfacing.
3.0 Aggregate Base Course
A. Material
A base course of bituminous concrete mixture; crushed aggregate; processed/recycled asphalt or processed/recycled concrete should be installed over the subgrade. The specified material should meet applicable ASTM specifications. Compacted thickness will depend on local soil and climatic conditions, but in no case should the thickness be less than the equivalent of 4” of thoroughly compacted crushed stone.
B. Spreading and Compacting
The material should be spread by methods and in a manner that produces a uniform density and thickness. The material thus spread should be compacted to 95% minimum Proctor Test with equipment that provides uniform density.
C. Tolerances
Surface of the base course as compacted should not vary more than 1/2” from the true plane of the court.
4.0 Intermediate Pavement Course

A leveling course of a hot plant mix having a maximum aggregate size of 3/8” to 3/4” in accordance with specifications of the state’s Department of Transportation and/or the Asphalt Institute should be constructed over the base course to a compacted thickness of not less than 1 1/2”.

This hot plant mix should be spread and compacted by methods and in a manner that produces a uniform density and thickness. The finished intermediate course should not vary more than 1/4” in 10’, when measured in any direction.

5.0 Modified Base Construction

A modified base course is sometimes used, particularly in areas not subject to freeze/thaw action. The modified base may consist of one course of suitable material as described above and may be installed to a uniform thickness of 2 1/2″ to 4″. The modified base should be compacted to provide a smooth, true plane surface, and should not vary more than 1/4″ in 10′, when measured in any direction.

6.0 Asphaltic Surface Course
A. General Description
A surface course of a hot plant mix having a maximum aggregate size of 3/8” and a minimum aggregate size of 1/4″ should be constructed over the hot mix intermediate course to a compacted thickness of not less than 1”.*
Suggested Mix Design:
Screen % Passing
1/2 100
3/8 90-100
#4 55-85
#8 32-67
#50 7-23
#200 2-10
*The proper type asphalt used for the surface course will vary from state to state if using the standard norm of the Department of Transportation (DOT) or State Highway Department standards. Local soil and climatic conditions also may impact the type of asphalt used.

Thickness: Not less than 1”.

Liquid Asphalt Bitumen: Minimum 5.5% by weight.

Aggregate Type: Crushed stone, gravel, shale, limestone, etc. Foreign materials, i.e., pyrite, clay, ferrous compounds, dirt and organic material are not acceptable.

Cure Time: Minimum 14 days before application of playing surface.

Voids Content: Minimum as specified by the Department of Transportation or State Highways Department, but in no case should void content exceed 7%.

B. Spreading and Compacting
This hot plant mix should be spread and compacted by methods and in a manner that produces a uniform density and thickness.
C. Surface Tolerance
The finished surface of the court should not vary more than 1/8″ in 10′ when measured in any direction.

Drawings:
Typical Asphalt Court Sections
Section Extended Apron at Asphalt Court Edge
Typical Asphalt Court Edging with Brick or Concrete Block

Note: Refer to Guidelines for:
1.A General Conditions for Construction
1.B Site Investigation
1.C Site Preparation, Earthwork, Drainage and Subbase Construction
1.D Vegetation Control or Vegetation Regrowth Prevention
1.E Subsurface and Surface Drainage for Recreational Areas
2.A Tennis Court Orientation
2.B Tennis Court Dimensions and Related Measurements

ASTM specifications are available from
American Society of Testing Materials (ASTM)
100 Barr Harbor Drive
West Conshohocken, PA 19428
610-832-950

NOTICE: These Construction Guidelines are for use by architects, engineers, contractors, tennis court and running track owners. Parties not experienced in tennis court or running track construction are advised to consult a qualified contractor, consultant and/or design professional. Experienced contractors, consultants and/or design professionals can be identified through the U. S. Tennis Court and Track Builders Association. Due to changing construction technology and techniques, only the most recent version of these Guidelines should be used. Variances in climate, soil conditions, topography and other factors may make these Guidelines unsuitable for certain projects.

Copyright © 1998 by U.S. Tennis Court and Track Builders Association. All Rights Reserved.