5
Fleet Angle -
The angle between the wire rope’s position at the extreme end wrap on a drum, and a line drawn per-
pendicular to the axis of the drum, through the center of the nearest fixed sheave or load attachment point.
Wrap -
A single coil of wire rope wound on a drum.
Layer -
All wraps of wire rope on the same level between drum flanges.
Freeboard -
The amount of drum flange that is exposed radially past the last layer of wire rope. Minimum freeboard
varies with the regulatory organization. ASME B30.5 requires ½ in. minimum freeboard.
a
b
First sheave
or load
First sheave or load should be
centered between the drum
flanges, so that angle “a” and
angle “b” are equal.
Angles “a” and “b” should be a
minimum of ½ degree and a
maximum of 1½ degrees.
Summary of Contents for BRADEN BA3A
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