JLG Skytrak 3013, Operation & Safety Manual

Page: 77 / 136

Section 5 - Attachments and Hitches
5 - 5 31211476
5.4 EQUIVALENT LOAD
Load Centers Beyond 24 Inches
Carriage and fork capacity charts provided by JLG are validated based on load centers of
24 inches. When the load center for the application being performed exceeds 24 inches,
the Equivalent Load must be calculated to use with the carriage capacity chart.
Utilizing Equivalent Load Calculation is applicable for all carriage and fork arrangements.
The forks of the JLG carriage must support 2/3 of the load length for any load applied.
Equivalent Load Calculation
The Equivalent Load is determined with the calculation below. The Equivalent Load is the
value applied to the respective carriage capacity chart to determine the appropriate use
zone(s).
1
Center of Gravity (CG) Distance is measured horizontally from the front surface of the fork.
Example
• Weight of load = 1,100 pounds
• Center of gravity of load = 36 inches
The Equivalent Load for this example is:
This value is cross-checked to the capacity of the forks to ensure the forks are rated to
equally share this load. The user then utilizes the carriage capacity chart to determine
where 1,650 lb can be safely moved and placed within the machine operating limits.
Weight of Attachment Load (lb) CG Distance of Load (in)
1

24 in
----------------------------------------------------------------------------------------------------------------------------------------------------------------- Equivalent Load
=
1 100 , 36 
24
----------------------------- 1 650 pounds ,
=