# Pre-Climb Safety Check Part of the Climbing Merit Badge Digital Resource Guide: [Introduction & Overview](https://merit-badge.university/merit-badges/climbing/guide/index.md) *9. The CHECK System* > **9.** Identify the elements of the CHECK system and describe the meaning of each one to your counselor. A climber ties in, the belayer loads the rope into the device, and someone calls "Climbing!" Everything looks fine — but the belayer's carabiner gate is not locked. One wrong move and the rope unclips from the belay device. This near-miss happens more often than anyone wants to admit, and it is exactly what the CHECK system prevents. The CHECK system is a pre-climb safety inspection that both the climber and belayer perform before anyone leaves the ground. It takes thirty seconds and catches the mistakes that cause accidents. ## C — Carabiners Check every carabiner in the system. Is each one: - **Locked?** Screw-gate carabiners should be screwed shut. Auto-locking carabiners should click into the locked position. An unlocked carabiner can open under load and release the rope. - **Properly oriented?** The carabiner gate should face away from the rock and away from the direction of loading. A gate pressed against rock can be forced open. - **Loaded on the spine?** Carabiners are strongest when the load runs along the spine (the solid side opposite the gate). Cross-loading — where the force pulls across the gate — reduces strength by up to 70%. > **Did You Know?** > > A standard locking carabiner is rated to hold about 24 kN (roughly 5,400 pounds of force) along the spine. But when cross-loaded or loaded with the gate open, that drops to as low as 7 kN — barely enough to hold a moderate climbing fall. Gate orientation matters enormously. ## H — Harness Check both the climber's and belayer's harnesses: - **Waist belt above the hip bones?** A low belt can allow the climber to slip out during an inverted fall. - **Buckles doubled back?** (If the harness requires it.) Modern auto-locking buckles do not need doubling back, but many rental and older harnesses do. - **Leg loops snug?** Loose leg loops let the climber slide down in the harness during a fall. - **Belay loop intact?** No fraying, cuts, or visible wear. - **Gear loops clear?** Nothing is clipped to a gear loop that should be on the belay loop. ## E — Environment Look around you. Assess the immediate climbing environment: - **Is the ground clear?** Remove loose rocks, gear, water bottles, and anything else from the fall zone and the belayer's stance. - **Is the weather stable?** Any signs of incoming rain or lightning? - **Are other climbing parties nearby?** Could their activities (rappelling, knocking rocks) create hazards? - **Is there enough light?** Can you see the route clearly? ## C — Connections Check every point where the system connects: - **Climber's knot:** Is the figure eight follow-through tied correctly with a sufficient tail? Are the strands parallel through the knot? - **Rope through the harness:** Is the rope threaded through both tie-in points (not just the belay loop)? - **Belay device threaded correctly?** Is the rope loaded properly into the ATC, GriGri, or other device? - **Anchor connections (if applicable):** Is the top-rope anchor built correctly and equalized? > **Safety First!** > > The Connections check is where most errors are caught. A figure eight that looks "close enough" might have a twist that weakens it. A belay device loaded backward will not brake properly. Take the time to trace the rope from the climber's harness through the entire system to the belayer's device. Every connection point must be correct. ## K — Knots The final check focuses specifically on knots: - **Figure eight follow-through:** Parallel strands, dressed neatly, tail at least 6 inches - **Stopper knot on the rope end:** If the rope is shorter than twice the route height, tie a stopper knot in the free end so the belayer cannot accidentally feed all the rope through the device during a lower - **Any knots in the anchor system:** Properly tied, dressed, and loaded correctly ![Infographic showing the five elements of the CHECK system: Carabiners, Harness, Environment, Connections, and Knots](https://ik.imagekit.io/doulacoop/tr:w-800/mbu-assets/merit-badges/climbing/guide/check-system-diagram?v=56053b87) ## Make It a Habit The CHECK system is not a formality. It is a structured way to catch the mistakes that experience alone does not prevent. Even professional climbing guides run through a safety check before every pitch. Make it a habit from your very first climb, and it will protect you for the rest of your climbing life. > **Tip** > > Run the CHECK system out loud with your partner. "Carabiners — locked. Harness — buckled and snug. Environment — clear. Connections — knot looks good, device loaded. Knots — dressed, tail long enough." Speaking the checks aloud makes it a conversation, not a solo exercise, and catches things both people might miss alone. **CHECK Quick Reference** — Run through before every climb - [ ] **C**arabiners: Locked, properly oriented, loaded on the spine. - [ ] **H**arness: Waist belt above hips, buckles secure, leg loops snug. - [ ] **E**nvironment: Ground clear, weather stable, no overhead hazards. - [ ] **C**onnections: Knot to harness correct, belay device loaded properly, anchor solid. - [ ] **K**nots: Figure eight dressed, stopper knot on rope end if needed. [Petzl — Partner Check Before Climbing](https://www.petzl.com/US/en/Sport/Partner-check-before-climbing): Illustrated guide to pre-climb partner checks from Petzl, with detailed photos of what to inspect. --- - Previous: [Personal Protective Equipment](https://merit-badge.university/merit-badges/climbing/guide/req8/index.md) - Next: [Belaying Skills](https://merit-badge.university/merit-badges/climbing/guide/req10/index.md)