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Block Loading vs. Angle of Deflection

Load on a block is a combination of the load on the line passing through the block, plus a block-loading factor, which is determined by the angle by which the block turns the sheet . For example, a footblock that turns a sheet 180° will see a load equal to twice the load on the sheet. A deck organizer, which turns a halyard only 30°, will see just 52% of the load on the halyard.

 

Angle of deflection Load factor   Angle of Deflection Load factor
30° 52%   120° 173%
     
45° 76%   135° 185%
     
60° 100%   150° 193%
     
75° 122%   160° 197%
     
90° 141%   180° 200%
     
105° 159%      



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