Operating Instructions; General Informations; Calculation Of Loading Of A Snatch Blocks; Ø Wire Rope Strength Reduction - Tractel EPC1.6-8/9 Manual De Empleo

Installation examples
Carter geometry allows for a cable angle of 70° maximum.

General informations

§ Use safety gloves and usual PP equipment when operating
§ Attach the block to a fixed anchoring and ensure the block WLL and resistance of the anchoring
point correspond to conditions of us - refer table (A).
§ Use a suitable wire rope - Wire rope choice is the guarantee of security and good functioning of the
block – refer table (C) depending on model.

Calculation of loading of a snatch blocks

The maximum Working Load Limit (WLL) written on the side of the block is the maximum load that should
be exerted on the block and its connecting fitting.
This total load value F varies with the angle (α) between the incoming and departing lines to the block. The
following table (A) indicates the factor to be multiplied by the line pull to obtain the total load F on the block.
Ø Wire rope strength reduction
M 6120 M
rev 17 – 03/2019
GB

OPERATING INSTRUCTIONS

Angle α Effort applied on suspension F
0°
15°
30°
45°
60°
90°
120°
150°
180°
Always ensure :
F < pulley WLL And F < anchoring point resistance
Winch WLLx 2
Winch WLLx 1,98
Winch WLLx 1,95
Winch WLLx 1,85
Winch WLLx 1,73
Winch WLLx 1,41
Winch WLLx 1
Winch WLLx 0,52
Winch WLLx 0
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