GYMAX External-Net 12FT

GYMAX 12FT Outdoor Recreational Trampoline User Manual

Model: External-Net 12FT

Introduction

Thank you for choosing the GYMAX 12FT Outdoor Recreational Trampoline. This manual provides essential information for the safe assembly, operation, and maintenance of your trampoline. Please read all instructions carefully before assembly and use to ensure safety and product longevity. Retain this manual for future reference.

1. Important Safety Information

Your safety is paramount. This trampoline is designed and manufactured to meet ASTM F381-16 and ASTM F2225-15 standards for recreational trampolines. Adherence to these safety guidelines is crucial to prevent injuries.

  • Adult Supervision Required: Always ensure an adult supervises trampoline use.
  • One Jumper at a Time: To prevent collisions, only one person should jump on the trampoline at any given time.
  • Weight Limit: Do not exceed the maximum weight recommendation of 149.69 kg (330 lbs).
  • Safety Enclosure Net: Always use the 360-degree enclosure net. Ensure the buckle and zipper double lock system is securely fastened before use.
  • Padded Mat: All springs are covered with a protective padded mat to prevent contact with springs and frame. Ensure it is always in place and in good condition.
  • No Somersaults or Flips: Attempting somersaults or flips can lead to serious injury.
  • Clearance: Ensure adequate overhead and surrounding clearance from structures, trees, and other obstacles.
  • Weather Conditions: Do not use the trampoline in wet, windy, or icy conditions.
  • Footwear: Jump barefoot or in appropriate trampoline socks. Do not wear shoes.
Child jumping on a trampoline with ASTM International Standards Worldwide logo

Image: The trampoline meets ASTM International safety standards, ensuring a safe jumping experience.

Close-up of the waterproof safety pad covering the trampoline springs

Image: Detail of the waterproof safety pad designed to cover the springs, enhancing user protection.

2. Product Components

Before assembly, verify that all components listed in the packaging diagram are present and undamaged. Refer to the included manual for a complete parts list.

Diagram showing trampoline components divided into three boxes for shipping

Image: Illustration of how the trampoline components are packaged across three boxes, detailing contents like vertical tubes, springs, jumping mat, and enclosure.

Key Features:

  • Durable PP Jumping Mat: Waterproof and wear-resistant for extended use.
  • Soft & All-covered Foam: Protective foam padding on poles for safety.
  • High-density PE Enclosure Net: UV, fade, and tear-resistant for long-lasting protection.
  • Zipper & Buckle: Double lock system on the enclosure net for enhanced safety.
  • Sturdy Ladder: A 2-step ladder is included for easy access to the trampoline.
  • Galvanized Steel Frame: Dual-side hot-dip galvanizing provides superior rust resistance.
  • W-shaped Legs: Provide strong and steady support for overall stability.
  • Solid T-shaped Connection: Ensures secure frame assembly.
Diagram highlighting trampoline features like durable jumping mat, foam padding, enclosure net, zipper, and ladder

Image: Visual representation of the trampoline's user-friendly details, including the jumping mat, foam-covered poles, enclosure net, and ladder.

3. Assembly Instructions (Setup)

Assembly requires at least two adults. Follow the step-by-step instructions provided in the separate assembly manual included with your purchase. Ensure all connections are secure before proceeding to the next step.

  1. Prepare the Area: Choose a flat, level outdoor surface with adequate clearance (at least 2 meters / 6.5 feet) around and above the trampoline.
  2. Assemble the Frame: Connect the galvanized steel frame sections using the T-shaped connectors and W-shaped legs.
  3. Attach the Jumping Mat: Secure the jumping mat to the frame using the high-extension springs. Use the provided spring tool for easier and safer attachment.
  4. Install the Safety Pad: Place the protective padded mat over the springs and frame.
  5. Erect the Enclosure Poles: Attach the foam-covered enclosure poles to the trampoline frame.
  6. Install the Enclosure Net: Secure the high-density PE enclosure net to the poles and the jumping mat.
  7. Attach the Ladder: Hook the 2-step ladder securely to the trampoline frame.
  8. Final Check: Before first use, double-check all bolts, nuts, springs, and connections to ensure they are tight and secure.
Diagram showing sturdy and safe construction details of the trampoline frame, including W-shaped legs and galvanized steel

Image: Details of the trampoline's robust construction, featuring W-shaped legs for stability and dual-side hot-dip galvanizing for rust resistance.

4. Operation Guidelines

Proper use of the trampoline ensures a fun and safe experience.

  • Always enter and exit the trampoline using the provided ladder.
  • Ensure the enclosure net zipper and buckle are securely closed before jumping.
  • Jump in the center of the mat.
  • Avoid jumping too high or attempting dangerous maneuvers.
  • Do not bounce off the enclosure net.
  • Remove all jewelry, watches, and sharp objects before jumping.
  • Do not use the trampoline as a springboard to other objects.
Two children jumping safely on the GYMAX trampoline with enclosure net

Image: Two children enjoying the trampoline, demonstrating proper use within the safety enclosure.

5. Maintenance and Care

Regular maintenance will extend the life of your trampoline and ensure continued safety.

  • Inspect Regularly: Before each use, check the trampoline for loose or damaged parts, including the frame, springs, jumping mat, safety pad, enclosure net, and poles.
  • Tighten Connections: Periodically check and tighten all nuts and bolts.
  • Clean Components: Clean the jumping mat and safety pad with mild soap and water. Avoid harsh chemicals.
  • Weather Protection: In extreme weather conditions (heavy snow, strong winds), consider disassembling the trampoline or securing it to prevent damage.
  • Replace Damaged Parts: Do not use the trampoline if any part is damaged or missing. Contact customer support for replacement parts.
  • UV Protection: The enclosure net is UV-resistant, but prolonged exposure to intense sunlight can still cause wear over many years.
Detailed view of trampoline features including sun protection, sturdy frame, protective foam, zipper, and ladder

Image: Features like sun protection for the jumping mat, protective foam on poles, and the safety buckle on the zipper, all contributing to durability and safety.

6. Troubleshooting

This section addresses common issues you might encounter.

  • Squeaking Noise: Check all frame connections and springs. Apply a silicone-based lubricant if necessary.
  • Loose Enclosure Net: Ensure the net is properly attached to all poles and the bottom of the jumping mat. Check the zipper and buckle for proper function.
  • Uneven Jumping Surface: Verify that the trampoline is placed on a completely flat and level surface. Check for any bent frame parts.
  • Missing or Damaged Parts: Refer to the parts list in your assembly manual. Do not attempt to use the trampoline with missing or damaged components. Contact customer support for replacements.

7. Product Specifications

Feature Detail
Brand GYMAX
Model Name Backyard Trampoline (External-Net 12FT)
Frame Size 12 feet (3.66 meters)
Product Dimensions (L x W x H) 2.44L x 2.44W x 2.7H meters (approx. 8FT L x 8FT W x 8.8FT H)
Material Polypropylene (PP) jumping mat, Alloy Steel frame
Shape Round
Maximum Weight Recommendation 149.69 kg (330 lbs)
Number of Springs 72
Pad Type Foam Pad
Color Blue
Certifications ASTM F381-16, ASTM F2225-15
Diagram showing the dimensions of the 12FT trampoline, including overall diameter, net height, and frame height

Image: Visual representation of the trampoline's key dimensions and features like safety protection, strong springs, and stable construction.

Close-up of trampoline springs, indicating the number of springs for various trampoline sizes

Image: Detail of the high-quality springs, showing the quantity used for different trampoline sizes (72 springs for 12FT model).

8. Warranty and Support

Warranty Description: This GYMAX trampoline comes with a 90-day warranty from the date of purchase, covering manufacturing defects. Please retain your proof of purchase for warranty claims.

Customer Support: For any questions regarding assembly, operation, maintenance, or warranty claims, please contact GYMAX customer service. Refer to the contact information provided in your product packaging or visit the official GYMAX website.

Manufacturer Contact Information: GYMAX

© 2026 GYMAX. All rights reserved.

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