wire
the length of a strand to make one full revolution
What is rope lay length
15 to 1
boom sheaves
4 to 1
safety factor for chains
15'
50-200 kv
Structural Competence
What is above bold line
2 broken wire in 6 diameters or 4 broken wires in 30 diameters
broken wire removal criteria for rotation resistant
20 to 1
rule of thumb for sheaves
5 to 1
safety factor for slings, synthetic and manbasket
35'
500-750kv
RTFN
what is read the f#@# notes
wire rope, center wires, core, strand, wires
the 5 parts of wire rope
16 to 1
Hoist block and drums in the crane
3.0 to 1
2.5 to 1
safety factors for standing rope
talk to the utility owner
over 1000kv
stability
below the bold line
3 wires in one strand in one lay or 6 randomly broken wires in one strand in one lay
broken wire criteria removal for regular running wire
18 to 1
boom tip sheaves
working 3.5 to 1
erection 3.0 to 1
safety factors of running rope
10'
up to 50 kv
effective weight
what the crane feels
wires and strands fall in the same direction
lang lay
D/d
Diameter of the load to diameter of the wire rope
10 to 1
7 to 1
manbasket safety factor for regular wire and rotation resistant
45'
750-1000 kv
elevation, boom tip height, radius, boom angle
what can be found in a range diagram