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method of reeving manila and wire rope blocks:

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HTO manila

METHOD OF REEVING TACKLE BLOCKS

vary with the application and purpose for which they are to be employed. Especially on Heavy Lift Cargo Booms, Cranes, etc. where Blocks, with 4 Sheves or more are required, in which case a number of Lead Blocks have to be considered. Our Engineering Department will be glad to consult with you on this matter.

METHOD OF FIGURING "PARTS OF LINE"
L = E
P
L = Load Lifted in pounds
P = Line Pull in pounds
E =
Efficiency Factor
To figure "Parts of Line" required when Load Lifted "L", and Line Pull "P" are known.

EXAMPLE:


32,000 lbs.
(Load Lifted "L")
= 5.3
6,000 lbs.
(Line Pull "P")

"E" factor of 5.3 in table indicates 6 "Parts of Line" required

Parts
of Lines
"E" Factor
Brass Sheave
"E" Factor
Better Bearing
1 0.96 0.96
2 1.05 1.9
3 2.0 2.9
4 3.6 3.5
5 4.4 4.7
6 5.2 5.8
7 5.9 6.5
8 6.6 7.3
9 7.3 8.2
10 7.9 9.0
11 8.5 9.8
12 9.1 10.6
HTO manila B
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