Chain Strike

Chain Strike is an offline-first parts-of-line workbench for shop millwrights, maintenance techs, riggers, and plant mechanics who must lock a real suspended load into falls count, mechanical advantage, and hand-chain pull before they lift. Cold start opens a fullscreen parts-line card—not a dispatch board, not an anchor planner. A schematic reeving diagram shows the load hook, upper and lower blocks, falls strands, and hand-chain path. Dial load (lb or kg) and parts of line (1–12), set your efficiency or friction-loss factor, and watch mechanical advantage and hand-chain pull update instantly. When pull or load crosses your WLL thresholds, overload and high-pull caution banners appear so you can rethink the reeving before the lift. Common shop presets (½ t, 1 t, 2 t, 3 t class) prefill capacity and default efficiency. Seed chain-grade and typical manual-hoist WLL reference cards give a quick floor cross-check. Save named hoist setups with load, falls, efficiency, and notes. Edit, duplicate, and reopen them anytime. Compare two saved setups side by side (falls vs pull) when you need to pick the reeving. A calculation breakdown sheet shows the MA formula, efficiency applied, pull per strand, and unit conversions—typed shop math with local persistence. Core loop stays offline: DataStore defaults for units, efficiency, and caution thresholds, plus a Room-backed history of setups. No sensors, no camera, no network required. FEATURES • Fullscreen parts-line card with live reeving diagram that redraws as falls change • Load input with lb/kg toggle and instant MA and hand-chain pull readout • Falls stepper (1–12) with adjustable efficiency/friction loss factor • Overload and high-pull caution banners against your WLL thresholds • Named hoist setup library: save, edit, duplicate, reopen • Side-by-side compare of two setups for pick-the-reeving decisions • Shop capacity presets and chain-grade / WLL seed reference cards • Calculation breakdown: MA formula, efficiency, pull per strand, units • Fully offline workbench built for the lift bay One glanceable parts-of-line card that turns load plus falls into honest hand-chain pull for real shop hoists—offline, fast, and built for the people who lift.