A sling is an assembly designed to connect a load to be lifted or turned to a lifting device such as the hook on a crane.
Wire rope sling weight calculation.
It lists the strength of improved plow steel ips wire rope that is uncoated and has a fibre core.
They have also offered an example of the strength of 3 8 wire rope that has a safe working load of 10 9 kn.
Resulting plotted points landing within a wire rope class band indicate uncertain stability for that rope class.
If the weight of a body is w the load in the wire is.
A wire rope sling is a safe tool when properly selected to meet the requirements of the lift and when used in a safe workmanlike manner.
This calculates the capacity of a wire rope sling based on the type of rope used in the sling and the angles at which the sling is used.
For example assume a 2000 pound load is to be supported by 2 legs of a sling.
F w 2 where.
To calculate the load on a particular sling leg proceed as follows.
Silver state wire rope 8740 south jones blvd.
Warrington fig 1 is a parallel lay construction with an outer layer.
Wire rope construction iwrc wire ropes are slightly 7 stronger that those with fabric or polymer fillers.
F force in rope n lb f w m g weight of body n lb f m mass of body kg slugs.
If the weight is too great the sling may break and.
Fell free to consult the sling angle factor chart.
To help demonstrate the breaking limit of wire rope the engineering toolbox have put together this handy table.
Resultant force force tension x angle factor.
The capacity of a single rope that follows a vertical line is 100 since the reduction factor is 1.
Take the total weight of the load and divide this by the number of legs supporting the load.
Length tolerances single part wire rope slings standard length tolerance is plus or minus two rope diameters or plus or minus 0 5 of the sling length whichever is greater.
Example capacity of a single rope or wire.
Wire rope figs 1 2 1x7 7x7 is a parallel lay construction with all filaments the same diameter and tends to be the stiffest of them all.
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See page 91 for reduced choker capacity when using these hook sizes.
They are also much more resistant to crushing and slightly stiffer.
