Tandem (Two-Crane) Lift Load Share
Each crane's share of a tandem lift from the CG, the derated allowable per crane, and a combined pass / fail. A designated lift director and an engineered plan govern.
Formula and source
share_c1 = W x (span - cg) / span; share_c2 = W x cg / span; allow = net_chart x derate / 100; pass when each share <= its derated allowable.
ASME B30.5 and OSHA 1926 Subpart CC by name; the cg-load-share statics plus a per-crane tandem derate.
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.