Calc line length block & tackle
Calc line length block & tackle
(OP)
Where can I find a formula or calculator that will calculate the length of line needed for a 6:1 block & tackle system? For example, a 70-foot tower is lying prone and needs to be raised to the vertical. The tower pick-point is at 50-feet, the vertical pick point is at 45-feet. If, Line-1 = 67-feet, what overall length of line is required across the entire pull? *Assume line stretch = 0 and Line-6 terminates at the sheave block. Thanks ahead for the help.
Tomcad
Tomcad





RE: Calc line length block & tackle
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Is the attached sketch what you've got?
Think it's just a matter of laying it out for your 6:1 ratio (ignoring the initial 45' portion), count the strands
for that ratio, multiply x 67', and then add the 45' plus whatever additional length you may need at the ground.
RE: Calc line length block & tackle