Forklift maximum height can refer to two distinct measurements: maximum fork height (how high the forks can lift) or maximum extended mast height (the total height of the mast when fully raised). Understanding both is essential for safe warehouse planning and equipment specification .
The Four Key Height Measurements
Lowered Mast Height (h1) is the distance from the floor to the top of the mast when fully collapsed. This determines clearance for doorways and low ceilings .
Example: Hyster H100FT has 108 inches collapsed height ; *EP EFLA251 has 82.5-91 inches* .
Maximum Fork Height (h3) is the maximum lifting height from the floor to the top of the fork face. This determines how high you can stack pallets .
Typical range: 4,000 mm (13 ft) to 8,000 mm (26 ft) or more .
Extended Mast Height (h4) is the total height of the mast when fully raised (not including forks). This matters for overhead clearance during lifting .
*Example: EP EFLA251 has 237-245 inches extended mast height* .
Free Lift Height is the distance the forks can rise before the mast starts to extend. This is crucial for low-clearance environments like trailers and containers .
Example: Hyster H100FT has a "3 Stage Mast, Full Free Lift" ; *EP EFLA251 has 34.5-40 inches free lift* .
Typical Height Ranges by Forklift Type
Standard Warehouse Forklift (3-5 ton) : Maximum fork height 189-220 inches (15-18 ft) ; lowered mast height 82-108 inches (6.8-9 ft) .
High-Capacity Reach (Telehandler) : Maximum fork height 3,000-11,000 mm (10-36 ft) ; unique reach-forward capability for placing loads on mezzanines .
Heavy Industrial (20+ ton) : Maximum fork height 8,000 mm (26 ft) ; extended mast height up to 5,800 mm (19 ft) .
Low-Profile (Railcar/Intermodal) : Maximum fork height 4,000 mm (13 ft) ; lowered mast under 2,000 mm for low-clearance railcars .
Mast Types and Height Capabilities
Mast Type Stages Typical Max Fork Height Typical Collapsed Height
Simplex (2-stage) 2 3,000 mm (10 ft) 1,800-2,000 mm
Duplex (3-stage) 3 4,500-5,500 mm (15-18 ft) 2,000-2,500 mm
Triplex (4-stage) 4 6,000-8,000 mm (20-26 ft) 2,200-2,800 mm
Telescopic Handler Boom 4,000-12,000 mm (13-40 ft) 2,000-3,000 mm
How to Find Your Forklift's Maximum Height
The maximum fork height and collapsed mast height are listed on the forklift's data plate (nameplate) and in the manufacturer's specification sheet . Always verify your forklift's specific capabilities:
Match collapsed mast height to facility doorway and overhead clearance
Select max fork height based on racking height (add 150-200 mm for clearance)
For container/trailer work, prioritize free lift height (1,200-2,000 mm+)
For high stacking (20+ ft), consider 4-stage triplex mast with lower collapsed height
The Bottom Line: A 3-stage mast forklift typically lifts 15-18 ft, 4-stage lifts 20-26 ft, and telehandlers reach up to 40 ft with extended boom . Always check both maximum fork height and collapsed mast height on your forklift's data plate before specifying any lift. For extreme heights, special masts and stability systems are required .