Tower Safety Static Line with Trolley

Teaching Note

The flatter the static line becomes, the higher the tension becomes. Increasing span, reducing sag, increasing gross load, or moving the trolley closer to an anchor can increase resultant forces quickly.

Student view: Use Trolley Distance from Tower in feet. The simulator converts that field into a trolley position percentage behind the scenes so students can see both the real-world distance and the calculated span position.

ANSI/TIA-10.48 Warning: Straight tag lifts for lift systems attached to the structure with vertical load position angles exceeding 10 degrees, and/or horizontal tag angles exceeding 70 degrees regardless of the gross load shall be treated as requiring additional review.

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. This does not mean lifts can be, or shall be, conducted with wind speeds up to 30 mph as there are other factors including specific site conditions, load control parameters and the types of objects being lifted that shall be considered when making this evaluation. 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.