The dimensions of outdoor ground-mounted adjustable Central and southern coastal areasbasketball hoops in China must strictly adhere to national standards to ensure safety and applicability. Specific dimensional requirements are as follows:
I. Core Structural Dimensions
Backboard Dimensions: Standard specifications: 1800mm (1.8m) width, 1050mm (1.05m) height, thickness ≥10mm (tempered glass backboard).
Lower edge height from the ground: 2900mm (2.9m), ensuring the relative position of the backboard and rim conforms to FIBA standards.
Aiming Area: A 590mm × 450mm rectangular aiming area must be drawn in the center of the backboard, with a 50mm wide border and 150mm from the edge of the backboard, to aid in shooting aim.
Rim Dimensions:
Inner diameter: 450mm (45cm), made of solid round steel (diameter ≥17mm).
Height: The upper edge of the rim is 3050mm (3.05m) from the ground, which is the internationally accepted standard height (youth Central and southern coastal areasbasketball hoops can be adjusted to 2.7-2.9 meters). Elasticity Requirements: The rim must possess a certain degree of elasticity. When 15-20 kg of pressure is applied, the sinking amount should be between 7-10 mm, and it should immediately return to its original position after unloading to avoid affecting shooting feedback.
Arm Extension Length: Standard range: 2250 mm (2.25 m) to 3350 mm (3.35 m). The specific selection needs to be determined based on court conditions and usage requirements.
Basic Educational Facilities: Typically uses a 2250 mm arm extension, suitable for courts with limited space.
Professional Courts: Uses a 3350 mm arm extension, providing a longer shooting distance and more room to maneuver.
Post and Base Dimensions: Distance from the bottom of the post to the back of the backboard: ≥1200 mm (1.2 m), to prevent athletes from colliding with the post.
Post Cross-Section Diameter/Side Length: Typically 100-150 mm, ensuring structural stability.
Base Dimensions:
* Fixed Base: Requires a counterweight of ≥400 kg (concrete or cast iron), with embedded parts measuring 600mm × 600mm × 1000mm (length × width × depth).
* Movable Base: Volume ≥0.5 cubic meters (counterweight required after water/sand filling), typically 2000mm × 1000mm × 340mm (length × width × height).
II. Material and Process Requirements
* Backboard Material:
Tempered Glass: Thickness 10-12mm, edges polished for scratch resistance, high impact resistance, high transparency.
* SMC Composite Material: UV resistant, suitable for budget-constrained scenarios (e.g., communities), but service life ≥5 years.
* Hoop Material:
High Carbon Steel (Q235 grade or higher): Surface galvanized or powder-coated, rust prevention level ≥ GB/T 13912 standard.
* Support and Crossbar Material:
Seamless Steel Pipe: Wall thickness ≥3mm, welds require flaw detection, surface electrostatic powder coating (weather resistance ≥5 years). Base Material:
Cast Iron (Mobile): Leak-proofing treatment required.
C30 Concrete (Fixed): Curing time ≥ 28 days to ensure strength meets standards.
III. Installation and Safety Specifications
Embedded Parts Construction:
In-ground Central and southern coastal areasbasketball hoop: Excavate a 600mm×600mm×1000mm pit, pour concrete for fixation, and erect the main structure after 3-5 days of curing.
Mobile Central and southern coastal areasbasketball hoop: The base needs to be filled with water/sand until the counterweight meets standards to prevent tipping.
Levelness Correction: During installation, use a spirit level to test around the Central and southern coastal areasbasketball hoop's tube walls to ensure the frame is level and avoid tilting that could cause safety hazards.
Backboard Stress Balance: When installing a tempered glass backboard, all five connection points must be on the same plane to ensure even stress distribution. The extension arm, backboard, and rim must be in a straight line, but the extension arm and rim must not contact the backboard.
Corrosion Protection Treatment: Outdoor Central and southern coastal areasbasketball hoops require a triple anti-corrosion treatment: pickling, phosphating, and electrostatic powder coating. The coating thickness is ≥60 micrometers, and the salt spray resistance test is ≥48 hours.
