Berson Rizhao City, Shandong Province Building Materials Technology Co., Ltd. (www.cnbsfs.com) is located in Rizhao City, Shandong Rizhao Rizhao City, a new urban Jinan City Garden Road 17-A, Contact: Su Lin Dong natural soil: compaction density greater than 90% moisture content 8-12%. After the eradication of turf and humus with about 12 tons rolling machine rolling longitudinally from both sides toward the middle to 5-8 times. · Gravel cushion: thickness of about 200mm, (diameter 30-50mm), with more than 12 tons of gravel rolling machine rolling to not loose the athletics track prices, no surface ripples far, compaction density of 2.2 t / cubic meters. Thickness tolerance of 8% athletics track, but not greater than ± 20mm. This width of not less than the design width. · Asphalt concrete layer: Xianpu rough asphalt layer, the thickness of 50mm, the maximum aggregate ≤ 35mm, with more than 12 tons rolling machine shop after rolling thin asphalt layer, the thickness of 30mm, the maximum aggregate ≤ 15mm, with more than 12 tons rolling machine rolling. * Note: (1) the temperature of the asphalt paving should athletics track standard sizes above 100 ℃, survived temperatures should be above 60 ℃. (2) rolling machine drum is appropriate water clean, avoid using diesel or other heavy scrubbing to ensure adhesion of the asphalt layer and plastic. Volleyball venue is rectangular, its length is 18 m, a width of 9 meters. Four weeks at least three meters wide barrier zone. From the ground, measured from at least seven meters barrier-free space. At least 5 meters barrier-free zone FIVB world venue sidelines, at least eight meters outside the end line, accessible venues over the space of at least 12.5 meters high. All boundary width of 5 cm, the color line drawing with the ground and venues other projects are different. The long side of the rectangular venue for the sideline athletics track construction, the short side of the end line. Sideline and end line width are included in the area of ??the venue area. Midline under the net, is the midpoint of the two edges of the connection, the game is divided into two equal than the field area. Each field area each draw a center line three meters from the offensive line (including its width). Between the middle and the offensive line for the first field area.