Jib Crane Steel Construction Calculation Basis (Sample Calculation):

Capacity: 1500 Kg
Lifting Height : 6 m.
Arm Length: 6 m.
Slewing Angle: 270° (max)

Hoist and Travel Units Basic Design Principles

When design an electrolift, four main factors are taken in to account with the aid of the formulas and diagrams. These are;

   1. Lifting capacity.
   2. Operating time.
   3. Loading spectrum.
   4. Daily operating time.

In this selection the subsquent factors are assumed fixed, These are;

Pulley Diameter Calculation

The rope pulley diameter is calculated as following;

Pulley Calculation

Cast iron wire rope pulleys are selected according to nominal wire rope diameter (d). A sample drawing and formulas for a pulley is below;

Strength Calculation of Wire Ropes

The strength calculation of steel wire ropes are performed according to tensile stress. In this calculation, breaking off force is expressed as in different forms.  Theoretical breaking off force of the wire rope is F_t ;

Drum Diameter Calculation

The drum diameter is calculated as the following;

Wire Rope Diameter Calculation

When the other stresses are ignored, wire rope is considered to be only subjected to tensile stress. According to this condition, diameter of wire rope;

Crane Rail Dimesions DIN 536

A Section					S Section