Guard Opening & Reach Distance (ISO 13857)

A mesh guard is only a guard if the openings are small enough for how close they sit to the hazard. This tool gives the ISO 13857 opening size limits by body part and distance, and the reach-over table for barrier height against hazard height, so fixed guarding is checked before it is fabricated.

Free, no login. Your inputs are saved in this browser. Values are engineering references — verify against manufacturer data and applicable codes before a final design.