Tower Safety Static Line with Top and Heel Pulley

Tower Safety Static Tag Line with Dedicated Top/Heel Pulley Simulator

Lift #5 | Learn • Lead • Live | Forces Are Not Hidden

Rigging Lab

Inputs

Gross Load (lb)500

Top Pulley Height above Ground (ft)100

Heel Pulley Height above Ground (ft)15

Load Height above Ground (ft)35

Hoist Distance from Tower (ft)60

Static Line Height at Tower (ft)95

Static Anchor Distance from Tower (ft)120

Trolley Distance from Tower (ft)45

Student input is distance in feet. The simulator calculates trolley position percentage automatically.

Optional / Advanced Inputs

Top Pulley Friction / System Loss (%)5

Heel Pulley Friction / System Loss (%)5

Wind Speed at Lift Elevation (mph)0

Dynamic Load Factor1

Prescribed Loaded Static-Line Sag (%)8

Teaching geometry only; not a full catenary, elasticity, pretension, temperature, or rope-self-weight calculation.

Equipment & Attachment Ratings

Load Line WLL (lb)2000

Top Pulley Rated Capacity / WLL (lb)4000

Heel Pulley Rated Capacity / WLL (lb)4000

Static Tag Line WLL (lb)5000

Top Pulley Attachment Sling WLL for Actual Hitch (lb)4000

Heel Pulley Attachment Sling WLL for Actual Hitch (lb)4000

Tower Static-Line Attachment Rated Capacity / WLL (lb)5000

Static-Line Anchor Rated Capacity / WLL (lb)5000

Trolley Connection Sling WLL for Actual Hitch (lb)4000

Load Hoist WLL (lb)2000

Load Hoist Anchorage Rated Capacity / WLL (lb)4000

Static tag line with dedicated top and heel pulley system

Results

Load-Line System

Load-Side Line Tension—

Top-to-Heel Line Tension—

Heel-to-Hoist Line Tension—

Top Pulley Reaction—

Top Pulley Fx / Fy—

Heel Pulley Reaction—

Heel Pulley Fx / Fy—

Force Transferred Into Trolley/Load Assembly—

Static-Line System

Equal Static Tag-Line Tension—

Left / Right Span Tension—

Static Tag-Line Multiplier—

Tower Static-Line Reaction—

Static Tower Fx / Fy—

Static Anchor Reaction—

Equilibrium Check—

Trolley Location—

Trolley Position—

Total Static Span—

Prescribed Loaded Sag—

Common-Attachment Reference

Combined Top/Static Resultant—

Combined Fx / Fy—

Use this combined vector only when the top pulley and static line act through the same attachment assembly or structural point. Otherwise evaluate them as separate structural loads.

Live Angles

Vertical Load-Position Angle—

Left Static Span Angle—

Right Static Span Angle—

Top-to-Trolley Line Angle—

Heel-to-Hoist Line Angle—

Top Pulley Included Angle—

Heel Pulley Included Angle—

Equipment Utilization

Load Line—

Top Pulley—

Heel Pulley—

Static Tag Line—

Top Pulley Attachment Sling—

Heel Pulley Attachment Sling—

Tower Static-Line Attachment—

Static-Line Anchor—

Trolley Connection Sling—

Load Hoist—

Load Hoist Anchorage—

Force Summary

Top PulleyNormal

Heel PulleyNormal

Static LineNormal

Tower TopNormal

Entered WLLsNormal

Live Warning — Normal

Adjust the inputs to evaluate the lift.

Math & Teaching Notes

Free-running equilibrium: load-side tension and equal left/right static tag-line tension are solved simultaneously from ΣFx = 0 and ΣFy = 0.
Sequential friction: top-pulley loss is applied from the load side to the top-to-heel segment; heel-pulley loss is then applied to the heel-to-hoist segment.
Dedicated trolley-tag review: static tag-line multipliers over 2.00x require Special Lift Review. The straight-tag 10°/70° triggers do not apply to this arrangement.
Prescribed sag: the sag input defines teaching geometry. It is not a full catenary, rope-elasticity, pretension, self-weight, or temperature model.
Separate structural loads: top-pulley and static-line tower reactions remain separate unless both act through one common attachment assembly or structural point.
Model boundary: a restrained, braked, clamped, or friction-controlled trolley requires another measured or engineered constraint.
Forces Are Not Hidden.

11.5.4 Wind Limitations: The nominal wind speed considered for standard load chart values is 30 mph at the elevation of the gin pole. Lifts in nominal wind speeds above 30 mph shall be considered as special engineered lifts in accordance with the ANSI/TIA-322-A standard with applicable evaluation and special lift parameter conditions applied.

Capacity: Manufacturer-rated capacities and sling WLLs for the actual hitch configuration are required. Utilization at 80% or greater is shown as a capacity review; utilization at 100% or greater is shown as Danger.