Expansion Joints – Although most asphalt tennis courts are constructed with no expansion joints, there are some engineers/designers who believe strongly that including saw-cut expansion joints help control the cracking that tennis courts inevitably experience. Contractor’s should have experience with whatever method the engineers/designers opt for.
cast over only one-half of the court , an expansion joint should be pro-vided in the slab under the net. If two or more courts are constru c t e d , expansion joints should be prov i d e d midway between court s. Slab re i n - f o r cement and joint details for this type of court are shown in Fi g u r e 3; a cross section and other typical
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Joints A non-extruded expansion joint filler material 3/4″ thick should be installed at the net line if the two halves of the court are cast separately, and between courts if there is more than one court. The bottom edge of the filler material should extend to or slightly below the bottom of the slab; the top edge should be held 7/8″ below the surface of the slab by a tack strip of wood, its top flush with the finished slab surface.
CrackMagic is a good solution for concrete expansion joints on tennis, basketball, and game courts. The product is packaged on one-gallon buckets and is available in green, red, and neutral. CrackMagic is especially good on cracks that exhibit movement, due to the strong and flexible nature of the acrylic resin and formuation.
Although the base of tennis courts can be of road base and asphalt or concrete, Recreational Surfacing Pty Ltd prefer to use a concrete slab. Concrete tennis courts technology has changed dramatically whereby the numerous expansion joints are not necessary. Depending on site conditions the normal slab is 100mm thick reinforced with F72 mesh.
Expansion Joint: 6 Expansion Joints divided evenly into 2 groups Running Perpendicular to each other; Locks: 32 Latch Locks: 2 Sides with 8 Female Parts Each and 2 Sides with 8 Male Parts Each; Support: 481 Gusseted Legs Support Upper Grid; Static Loading: 16,000 lbs./sq. ft. Fungus and Mildew Resistant
The expansion joints allow the tiles to be flexible and conform better to uneven sub-surfaces, providing more consistent ball bounces than any other outdoor tile on the market. The expansion joints also allow the court to be fastened to the subsurface around the perimeter of the court.
When courts get into the 20+ year range they are resurfaced even more often just to keep them in playing condition. Resurfacing includes pressure cleaning, crack repairing, birdbath removal and typically a 3-coat acrylic surfacing system and striping. Please realize that the cracks will typically re-appear the first time there is cooler weather. Cracks act like expansion joints, and they open up and close with the cooler weather.