Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

Wire Rope Slings

Sling angle and influence on capacity

Sponsored Links

Slings angles affects ropes capacities.

If angle - alpha - is measured between

  • the vertical line (as with gravity force), and
  • the rope or wire

the relative capacity compared to a vertical straight lifting is reduced with rduction factor as indicated below.

f = cos(α)                           (1)

where

f = reduction factor

α = angle between vertical line and rope (degrees)

Angle
- α -
(degrees)
Reduction Factor
- f -
0 1.000
10 0.985
20 0.940
30 0.866
40 0.766
50 0.643
60 0.500
70 0.342

Example - Capacity of a Single Rope or Wire

The capacity of a single rope that follows a vertical line is 100% since the reduction factor is 1.

If the weight of a body is W - the load in the wire is

F = W                                     (2)

where

F = force in rope (N, lbf)

W = m g = weight of body (N, lbf)

m = mass of body (kg, slugs)

g = acceleration of gravity (9.81 m/s2, 32.17 ft/s2)

For a body with mass 100 kg the load in the rope can be calculated

F = (100 kg) (9.81 m/s2)

  = 981 N

  = 9.8 kN

Example - Capacity of Two Ropes (or Wires)

Two wires or ropes follows the vertical line

The capacity of two wires that follows the vertical line is 100% since the reduction factor is 1.

If the weight of a body is W - the load in each wire is

F = W / 2                                  (3)

For a body with weight 1000 N the load in each rope can be calculated as

F = (1000 N) / 2

   = 500 N

   = 0.5 kN

Two wires - or ropes - with angle 30o to the vertical line

The capacity of two wires with angle 30o to the vertical line is 86.6% since the reduction factor is 0.866.

If the weight of a body is W - the load in each wire is

F = (W / 2) / cos(30o)

   = (W / 2) / f

   = (W / 2) / 0.866

   = 0.577 W                                          (4)

For a body with weight 1000 N the loads in the ropes can be calculated

F = 0.577 (1000 N)

   = 577 N

   = 0.58 kN

Wire Rope Slings Calculator

The calculator below can be used to calculate the wire rope forces. Note that mass (kg) and not weight (N) is used as input.

Two Slings

mass (kg)

lenght - a (m)

height - h (m)


Load Calculator!

Three Slings

mass (kg)

lenght - a (m)

height - h (m)


Load Calculator!

Four Slings

mass (kg)

lenght - a (m)

lenght - b (m)

height - h (m)


Load Calculator!

Sponsored Links

Related Topics

Related Documents

Sponsored Links

Share

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.

Topics

Unit Converters

Temperature

oC
oF


Load Calculator!

Length

m
km
in
ft
yards
miles
naut miles


Load Calculator!

Area

m2
km2
in2
ft2
miles2
acres


Load Calculator!

Volume

m3
liters
in3
ft3
us gal


Load Calculator!

Weight

kgf
N
lbf


Load Calculator!

Velocity

m/s
km/h
ft/min
ft/s
mph
knots


Load Calculator!

Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


Load Calculator!

Flow

m3/s
m3/h
US gpm
cfm


Load Calculator!

8 23

This website use cookies. By continuing to browse you are agreeing to our use of cookies! Learn more