Slackline Webbing Tension, Sag & Anchor Force Modeler

This is a static walker standing still at the worst position. Bouncing, leash falls and dynamic movement multiply the tension several times over, and a leash fall on a highline is the design case rather than a standing walker — size anchors against that, not against this. Small-sag geometry is assumed, which holds while sag is well under a tenth of the span and overestimates tension beyond it. Webbing elasticity is not modelled, so the sag entered must be the sag under load, not the unloaded rigging sag. **This is a decision-support estimate only.** Anchor systems are life-safety rigging and must be designed, redundant and inspected by a competent person.