Chain / Lever Hoist Effort and Travel
Hand-pull effort, hand-chain travel for the lift, and a pass / fail against the rated WLL of a chain or lever hoist. ASME B30.16 / B30.21; the rated WLL is the ceiling.
Formula and source
hand_pull = load / (mech_adv x efficiency); hand_chain_travel = lift x mech_adv; pass = load <= rated_wll.
ASME B30.16 (Overhead Hoists) and ASME B30.21 (Lever Hoists) by name; first-principles mechanical advantage with a drivetrain efficiency.
Audience
This tile is built for trades and the adjacent professions in the Rigging and Heavy Lift group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
Related tiles
Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.