Roller / Skate / Jacking Push Force
Steady and breakaway push force to move a load on rollers or skates, the grade component.
Example
You enter
- Load on the skates (lb) 12000
- Rolling coefficient (skate ~0.02-0.05) 0.03
- Capacity of one skate (lb) 5000
You get
- Rolling force 360
- Steady push (grade + roll) 360 lb
- Breakaway push 540 lb
- Skates by capacity 3
Details, formula, and sources
Steady and breakaway push force to move a load on rollers or skates, the grade component, and the skate count by capacity. Verify the floor's own capacity.
roll_force = load x roll_coef x cos(incline); grade_force = load x sin(incline); push_steady = roll_force + grade_force; push_breakaway = push_steady x 1.5; skates = ceil(load / skate_cap).
Standard machinery-moving practice (rolling resistance + grade) by name; first-principles.
The rolling-resistance and grade statics are public physics. Skate capacities come from the manufacturer.
Estimate. Head rigger and manufacturer working-load-limit charts govern. Inspect every piece of hardware before the show.
Field names used by the API: load_lb, roll_coef, skate_cap_lb, roll_force_lb, push_steady_lb, push_breakaway_lb, skates_needed
- Rolling coefficient steel roller ~0.01, machinery skate ~0.02-0.05 (default 0.03)machinery-moving practice
- Breakaway factor 1.5x the steady push (startup / stiction)machinery-moving practice