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1. Anchor Trees & Structural Strength

Look for two healthy, mature hardwood trees (such as oak, pine, or maple) with a minimum trunk diameter of 12 inches (30 cm) at the cable attachment height. A typical backyard zip line generates between 800 lbs and 3,000 lbs of horizontal tension under rider weight, so never anchor into dead trees, fruit trees, or hollow trunks.

2. Course Clearance & Hazard Removal

Verify that the path between the two trees has at least 7 feet of vertical clearance beneath the rider's feet (at the lowest sag point) and 5 feet of horizontal clearance on both sides. Clear away low-hanging branches, shrubs, boulders, logs, and fences before tensioning the line.

3. Target Slope (3% to 6%)

Plan for an overall elevation drop between 3% and 6% (3 to 6 feet of drop for every 100 feet of distance). If your yard slopes downhill naturally, account for the ground drop when setting tree anchor heights so the cable maintains uniform clearance above ground.

4. Launch & Dismount Zones

Determine how riders will get on and off the line. If building a wooden launch platform, place it approximately 5 to 6 feet below the starting cable mount. Ensure the dismount area at the end tree is flat, free of obstacles, and equipped with a stainless steel spring brake.

Have questions about your yard layout or sizing? Contact CTSC customer support directly at support@iziplineinc.com. All CTSC products include our 1-year manufacturer warranty and 30-day money-back guarantee.