Carriage - There are actually 4 sizings of hook type fork carriages rated by the blade carriage lifting capability. Hook type blade carriages have been consistent.
Class I carriages are rated for loads up to 2000 lbs. The carriage bar spacing utilized for Class I is 13 inches. Class II carriages are rated for cargo up to 5,550 lbs. Their carriage bar spacing is 16 inches. Class III carriages are rated for cargo up to 10,000 lbs. The carriage bar spacing for this class is 20 inches. Class IV carriages are rated for loads up to 15,500 lbs. The carriage bar spacing used for this capacity is 25 inches.
The carriages for pin type forks can be different depending on the maker. Pin mounted blades can vary by the amount of offset between the tine eye and the tine. Carriage capacity will be determined by the carriage pin size and by the fork size.
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