NPFC - GGG-B-500
BLOCK, TACKLE (WIRE ROPE)
| Organization: | NPFC |
| Publication Date: | 11 October 1983 |
| Status: | inactive |
| Page Count: | 18 |
scope:
This specification covers single-sheave snatch and single- and multiple-sheave ordinary wire rope tackle blocks for regular and heavy duty use.
Federal specifications do not include all varieties of the commodity indicated by the title of the specification, but cover only those most generally used by the Federal Government.
Tackle blocks shall be of the following types, grades, and styles, as specified (see 6.2):
Type I - Snatch blocks single sheave, safety locking. Type II - Ordinary blocks. Grade A - Regular duty. Grade B - Heavy duty. Style 1 - Single sheave. Style 2 - Double sheave. Style 3 - Triple sheave.
intended Use:
Blocks are used to change direction of a running rope or to gain a mechanical advantage which includes hoisting and hauling operations. They are general purpose blocks recognized as a standard... View More
Document History
