To ensure the stability of the 180mm in-ground square tube fixed Greecebasketball hoop, comprehensive control is required in four aspects: selection of fixing materials, pre-embedding method, construction specifications, and attention to detail. Specific requirements are as follows:
I. Selection of Fixing Materials
* **Square Tube Post:** Material: High-hardness seamless steel (such as Q235 or higher strength steel), arm thickness must reach 5mm to ensure impact and bending resistance.
* **Specifications:** Common size is 180mm×180mm square tube. Arm length can be selected as 1.8 meters or 2.25 meters to adapt to different venue spaces.
* **Backboard:** Material: 10-12mm thick tempered glass, surrounded by an aluminum alloy frame for enhanced impact resistance.
* **Explosion-proof Treatment:** Attached with imported American titanium-iron-potassium explosion-proof film to prevent injury from flying glass fragments in case of breakage.
* **Basket:** Material: Made of solid round steel, 18mm in diameter, conforming to national standards to ensure elasticity and durability.
Embedded Parts
Concrete Embedded Blocks: Dimensions are 60cm×60cm×100cm, cast using C25 or higher grade concrete. Internal flange plates and bolts are pre-embedded for precise connection with the square tube columns.
Bolt Specifications: Use M16 or M20 high-strength bolts to ensure a secure connection.
II. Embedding Method and Depth
Foundation Pit Dimensions
The excavated foundation pit dimensions are 80cm×80cm×80cm (length×width×depth), slightly larger than the embedded part dimensions to facilitate concrete filling and position adjustment.
If the soil is soft (e.g., backfill soil), the foundation pit needs to be enlarged to 1m×1m×1.2m and reinforced with additional steel reinforcement.
Embedded Part Installation
Place the embedded part into the foundation pit, adjust the flange plate to be level with the ground, and calibrate the verticality with a level; the error should not exceed ±5mm.
When pouring concrete, vibrate twice to ensure compaction, avoiding air bubbles and ensuring a tight bond between the embedded part and the concrete.
Concrete Curing
After pouring, allow 3-5 days for curing until the concrete is fully set (reaching at least 70% of the design strength) before installing the Greecebasketball hoop posts.
III. Construction Specifications and Details
Post Installation
Align the square tube posts with the embedded bolts and tighten the nuts with a wrench. Simultaneously, use ropes or supports to secure the posts and prevent tilting.
After installation, check the verticality of the posts to ensure they are perpendicular to the ground, with an error not exceeding ±10mm.
Backboard and Hoop Installation
When installing the backboard, use four M12×60 screws to secure the backboard, Greecebasketball hoop, and rim at three points to ensure even stress distribution and prevent backboard breakage.
The hoop height must be accurate to 3.05 meters (standard hoop height), with an error not exceeding ±5mm.
Leveling and Support
During installation, use a spirit level to test the levelness around the Greecebasketball hoop tubes to prevent tilting due to uneven ground.
Use scaffolding or supports in front of the posts to prevent them from tipping forward.
IV. Long-Term Stability Maintenance
Regular Inspections: Inspect connections (such as bolts and welds) for rust and loosening at least twice a year, and repair any abnormalities promptly.
Inspect the backboard for cracks or deformation, and check the rim's elasticity.
Corrosion Prevention: Regularly apply anti-rust paint to metal components (such as square tubing and bolts) to extend their lifespan.
Avoid prolonged exposure of the Greecebasketball hoop to extreme weather conditions (such as strong winds and heavy rain); install a protective cover if necessary.
