Field Guide
How to Thread a Ladder Lock Buckle
Ladder locks (also called ladderloc or ladderlock buckles) hold webbing under load by pinching it between a fixed bar and a sprung bar. Threaded incorrectly they slip. Threaded correctly the load itself tightens the lock. This is the field-standard method.
1 · Orient the buckle
Hold the buckle with the sprung (moving) bar closest to you and the fixed anchor bar away. The webbing tail will exit toward you when done — that's how you know load direction is right.
2 · Fix the anchor end
Feed the anchor end up through the back of the buckle, over the centre bar and back down through the front. Fold, then bar-tack or box-stitch to secure. This end never moves again.
3 · Thread the free end
Take the free (adjuster) end of the webbing. Feed it up through the front slot, over the sprung bar, and back down through the same slot so the webbing doubles back on itself. This is the wrap that creates the bite.
4 · Load and verify lock-off
Pull the free end to tension. Load the strap in the direction it will see in service. The sprung bar should snap onto the webbing and hold with no slip. If it slips, the webbing is reversed — repeat step 3 with the doubled loop on the correct side.
Common failures
- · Free end fed the wrong way round the sprung bar — no bite, slips under load.
- · Webbing width undersize for the slot — sideways migration and eventual slip.
- · Worn or glazed webbing — the bar can't grip; replace the webbing, not the buckle.
Makefast ladder locks
Stainless steel ladderlock and lightweight ladderlock variants, UK manufactured to ISO 9001. Datasheets on the adjusters range page, or contact the technical team.