Excellent stadium track is a systematic project. High quality rubber surface is attached to the qualified athletic track foundation and perfect drainage system. Only after the completion of the athletic track can it achieve the use effect. So foundation construction is very important for laying athletic track. 1. Sub-base requirement ;Concrete or AC asphalt are available .The compressive strength is more than 3000Psi, with good flatness (Take 2m aluminum magnetic level rule and wedge feeler measure ,the maximum tolerance is no more than 3mm).The drainage slope shall be 003--0.08%.The new concrete surface must maintenance at least 28 natural days. Foshan GRK Commercial Co ltd is one of the Chinese flooring solution supplier. 2. Precautions for construction of drainage ditch: 1 ) The structure of the drainage ditch complies with the relevant national " synthetic rubber track construction design standards" (including the size of the ditch bo...