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How to Read a Forklift Capacity Plate: Complete Guide with Examples

Quick Answer

A forklift capacity plate(or data plate, nameplates) tells you the maximum safe load the truck can carry under specific conditions. The three numbers that matter most are: (1) rated capacity in lbs or kg, (2) load center in inches or mm - the distance from the fork face to the load's center of gravity, and (3) maximum lift height. All three work together. Change any one of them and the rated capacity changes too. A 5,000 lb forklift does not always lift 5,000 lb - read every line of the plate before you load.

24 in

Standard load center

Most rated capacities are calculated at a 24-inch (600 mm) load center

30-50%

Capacity drop

Typical capacity reduction when lifting at full height vs. ground level

29 CFR

1910.178(a)(6)

OSHA regulation requiring a legible data plate on every forklift at all times

Deaths per year (US)

Annual forklift fatalities - overloading and tip-overs are leading causes

1. What Is a Forklift Capacity Plate?

The capacity plate - also called a data plate, nameplate, or weight plate - is a metal tag permanently mounted on every forklift, typically on the dashboard or front mast upright where the operator can see it from the seat. It is not a suggestion. Under OSHA 29 CFR 1910.178(a)(6), every forklift must carry a durable, corrosion-resistant nameplate that is legible at all times. Operating a forklift with a missing, damaged, or illegible plate is a citable OSHA violation.

The plate is installed by the manufacturer and verified by a nationally recognized testing laboratory (NRTL) such as UL or FM. Per ANSI/ITSDF B56.1, the capacity listed is the result of either a physical tilt-table test or an engineered calculation covering the truck's worst-case stability envelope. It is not an estimate - it is a tested, certified limit.

Operating rule: Never operate a forklift if the capacity plate is missing, unreadable, or has not been updated to reflect attachments or modifications. Contact your dealer or a qualified engineer for a replacement plate before putting the truck back in service.

2. Every Field on the Plate - and What It Actually Means

Capacity plates vary slightly by manufacturer and truck type, but OSHA and ANSI mandate a set of core fields that must always appear. Here is every field, what it means, and why it matters:

Sample Capacity Plate - Electric Counterbalance Forklift
TRUCK TYPE
E
MODEL
FB25X
RATED CAPACITY
5,511 LB / 2,500 KG
LOAD CENTER
24 IN / 600 MM
MAX LIFT HEIGHT
130 IN / 3,300 MM
TRUCK WEIGHT
9,260 LB / 4,200 KG
BATTERY WEIGHT (MIN/MAX)
1,540 / 1,760 LB
MAST TYPE
3-STAGE / FULL FREE LIFT
ATTACHMENT
SIDE-SHIFTER
CAPACITY WITH ATTACHMENT
4,850 LB / 2,200 KG

Field	What It Tells You	Common Mistake
Truck type designation e.g. E, G, LP, DS, EX	Power source and hazardous-area rating. E = electric; G = gasoline; LP = liquid propane; DS = diesel; EX = explosion-proof rated	Assuming any electric truck is safe in classified hazardous areas - only EX-rated trucks are approved
Rated capacity	The maximum load the truck can lift safely - but only at the stated load center and lift height. It is not an absolute ceiling independent of those conditions	Treating rated capacity as a fixed number regardless of load position or height
Load center	The horizontal distance from the front face of the forks to the center of gravity of the load. Standard is 24 in (600 mm). The rated capacity is only valid at this exact distance	Not accounting for loads wider than 48 in - their center of gravity sits beyond 24 in, reducing effective capacity
Maximum lift height	The height to which the stated capacity applies. As lift height increases, residual capacity decreases - a separate residual capacity chart on the mast shows this relationship	Assuming full rated capacity still applies when lifting to 4m+ in a high-rack warehouse
Truck weight (service weight)	The weight of the truck itself, including battery for electric models. Critical for floor load calculations and elevator capacity planning	Forgetting that a loaded forklift on an elevator = truck weight + load weight. Combined weight can exceed elevator ratings
Battery weight (min/max)	Electric trucks only. The counterweight function is partly performed by the battery - if a lighter battery is installed, rated capacity is invalidated and must be recalculated	Swapping to a smaller/lighter battery without updating the capacity plate
Mast type	2-stage, 3-stage, 4-stage, or full free lift. Determines how the truck lifts and at what height visibility is restricted. Capacity at full height depends on mast type	Replacing a mast without recertifying the capacity plate
Attachment (if installed)	Any non-factory attachment (side-shifter, clamp, drum handler) adds weight and shifts the load center forward, reducing capacity. A second line on the plate shows revised capacity with the attachment installed	Using base rated capacity when an attachment is fitted - the lower attachment capacity line applies
NRTL approval mark	Confirmation that a nationally recognized testing laboratory (UL, FM, CSA) has verified the specifications. Required by OSHA 29 CFR 1910.178(a)(3)	Accepting a replacement plate from an uncertified source

3. The Load Center: The Most Misunderstood Number on the Plate

Load center is the single most misunderstood concept in forklift operation. The rated capacity on the plate assumes the load's center of gravity sits exactly at the stated load center distance from the fork face - typically 24 inches (600 mm). This corresponds to a standard 48-inch-deep pallet with evenly distributed weight.

Move the load center further out - because the load is deeper, heavier on one side, or because an attachment pushes the load forward - and the truck becomes less stable. The effective safe capacity drops. The plate number does not change. Your margin of safety does.

How Load Center Affects Actual Capacity

The relationship is roughly proportional. Use this formula to estimate adjusted capacity when your load center differs from the plate value:

Capacity Adjustment Formula
Adjusted Capacity = Rated Capacity x (Rated Load Center / Actual Load Center)
Example: 5,000 lb truck rated at 24 in load center.
Your load has its center of gravity at 36 in from the fork face.
Adjusted Capacity = 5,000 x (24 / 36) = 3,333 lb
You have lost 33% of your rated capacity - without touching the plate.

Actual Load Center	5,000 lb truck (rated at 24 in)	Capacity Remaining	Typical Scenario
24 in (600 mm)	5,000 lb	100%	Standard 48 x 40 in pallet, even load
30 in (762 mm)	4,000 lb	80%	60-in deep pallet or front-heavy load
36 in (914 mm)	3,333 lb	67%	72-in deep load or attachment adding reach
48 in (1,219 mm)	2,500 lb	50%	96-in load or large drum clamp extended

The counterweight myth: Some operators believe adding weight to the rear of a forklift increases its lifting capacity. It does not. Adding counterweight changes the truck's center of gravity and handling characteristics - it does not change the certified rated capacity on the plate, and it creates new tip-over risks in different directions. Never modify counterbalance measures without manufacturer written approval and a new plate.

4. Lift Height and Residual Capacity

The rated capacity on the plate applies at a specific lift height - usually ground level or a low travel height. As the mast extends upward, two things happen that reduce safe capacity: the truck's center of gravity rises, and the forward leverage on the front axle increases. This is called residual capacity - the actual usable capacity at a given height.

Residual capacity is shown on a separate chart mounted on the mast, not on the capacity plate. In high-rack warehouses - the most common setting where this matters - operators who read only the capacity plate and ignore the residual chart are operating blind at their most dangerous moments.

Residual Capacity - 5,000 lb Forklift (Illustrative)

Ground (travel)

5,000 lb - 100%

6 ft (1.8 m)

4,400 lb - 88%

10 ft (3 m)

3,900 lb - 78%

15 ft (4.6 m)

3,200 lb - 64%

20 ft (6.1 m)

2,600 lb - 52%

Note: Values are illustrative. Always refer to the specific residual capacity chart mounted on your truck's mast. Actual figures vary by model, mast type, and attachment.

The practical implication: a 5,000 lb rated forklift placing pallets on a 20-foot rack may only safely handle 2,500-2,800 lb at that height. If your loads weigh 4,000 lb and you are stacking them at 20 feet, you are operating beyond safe limits every time - and the capacity plate gave you the right number. You just did not read the mast chart too.

5. Attachments: When the Plate Changes

Any non-factory attachment fitted to a forklift - side-shifter, rotator, clamp, drum handler, push-pull, single-double - has two effects on rated capacity:

The attachment itself weighs something - typically 200 to 1,000 lb depending on type. This is treated as a load the truck is already carrying, reducing what is left for the actual pallet
Attachments move the load center forward - adding mechanical reach shifts the load's center of gravity further from the front axle, reducing stability and therefore effective capacity

Under OSHA 29 CFR 1910.178(a)(5) and ANSI B56.1, every attachment requires written manufacturer approval before installation. Once approved, the capacity plate must be updated to show the combined weight of truck and attachment, and the revised capacity at maximum elevation with the attachment installed.

Attachment Type	Typical Weight	Typical Capacity Impact	Plate Update Required
Side-shifter	200-350 lb	-300 to -500 lb on rated capacity	Yes
Rotating clamp	500-900 lb	-800 to -1,500 lb	Yes
Single-double (fork spreader)	300-500 lb	-500 to -1,000 lb (plus load center change)	Yes
Drum handler	150-400 lb	-300 to -600 lb	Yes
Extended forks (beyond factory length)	Varies	Significant - load center shifts proportionally to fork extension	Yes

Attachments have their own data plates. Per OSHA and ANSI, every attachment must carry its own data plate showing the attachment's weight, the maximum capacity of the truck-and-attachment combination, and a warning to consult the truck's plate for the actual operative capacity. If a capacity is shown on the attachment plate that is higher than what the revised truck plate shows, the lower number always governs.

6. Truck Type Designations: The Letter Code Explained

The truck type designation on the capacity plate is not just a fuel identifier. It is a safety classification defined by OSHA and ANSI that determines where the truck is legally permitted to operate based on environmental hazards.

Code	Power Source	Hazardous Area Rating	Typical Use
E	Electric	General (non-classified) areas	Standard warehouses, finished goods storage
ES	Electric	Areas where flammable vapors may exist in minor quantities	Facilities with occasional solvent use
EE	Electric	Areas with moderate flammable vapor or dust risk	Grain handling, certain chemical storage
EX	Electric	Classified hazardous locations (NEC Class I/II Div. 1)	Pharmaceutical API areas, solvent storage, paint facilities
G	Gasoline	General (outdoor or well-ventilated areas)	Lumber yards, outdoor construction, loading docks
LP / LPS	Liquid propane	LP = general; LPS = some classified area protection	Food distribution, cold storage loading docks, outdoor yard
D / DS / DY	Diesel	D = general; DS / DY = additional safeguards	Heavy outdoor operations, ports, construction sites

7. When the Plate Must Be Updated

The capacity plate is a living document. Any change to the truck that affects capacity, weight distribution, or safe operation requires a plate update - and written manufacturer approval before that change is made. This is not optional under OSHA or ANSI.

Change	Plate Update Required	Manufacturer Approval Required
Adding a non-factory attachment (side-shifter, clamp, etc.)	Yes	Yes - written approval required first
Replacing the battery with a different weight	Yes	Yes if outside min/max range on plate
Replacing the mast with a different type or height	Yes	Yes
Extending or lengthening the forks	Yes	Yes
Modifying the counterweight	Yes	Yes - and rarely granted
Routine maintenance (oil, filters, tires of same spec)	No	No

If the original manufacturer is out of business or unresponsive, OSHA allows a Qualified Registered Professional Engineer to perform the safety analysis and approve the modification in writing. The plate must still be updated before the truck returns to service.

8. What to Do When the Plate Is Missing or Unreadable

A forklift without a legible capacity plate must be taken out of service immediately. This is not a judgment call - it is a direct OSHA requirement under 29 CFR 1910.178(a)(6).

Steps to follow:

Tag out the truck - attach a lockout/tagout notice preventing operation until the plate is replaced
Locate the model and serial number - usually stamped on the frame near the overhead guard mounting or under the hood. You need this to order a replacement
Contact the manufacturer or authorized dealer - provide model, serial number, and any known attachments. Most manufacturers can issue a certified replacement plate within a few business days
If the manufacturer is no longer operating - contact a Qualified Registered Professional Engineer to assess the truck and issue a certified replacement plate. Do not attempt to recreate the plate from memory or old records without engineering sign-off
Inspect the new plate for completeness - verify it includes all fields required by OSHA and ANSI, and reflects any attachments currently installed

Pre-shift check reminder: OSHA requires a pre-shift inspection of every forklift before each shift. Plate legibility is part of that inspection. If the plate is faded, scratched, or partially obscured, document it and initiate replacement - do not wait for a full inspection failure.

9. Operator Quick-Reference: Reading the Plate in 60 Seconds

Before every shift, operators should run through this sequence:

Is the plate present and fully legible? If no - tag out the truck, do not operate.

What is the truck type designation? Confirm it matches the area you will be operating in.

What is the rated capacity and at what load center? Write or remember the number. Standard 48-in pallets = 24-in load center. Wider or longer loads = load center moves out, capacity drops.

Is an attachment installed? If yes, use the lower capacity figure on the attachment line of the plate - not the base rated capacity.

Will you be lifting above 10 feet? If yes, locate and read the residual capacity chart on the mast before loading.

Does the load you are about to pick match these conditions? If the load weight, depth, or height requirement exceeds what the plate and mast chart permit - do not lift. Escalate to a supervisor.

Frequently Asked Questions

What happens if I exceed the rated capacity?

Exceeding rated capacity destabilizes the truck by shifting the combined center of gravity forward of the front axle - the tipping point. When this happens, the front wheels act as a fulcrum and the truck tips forward, crushing anything in front of it including the operator. Tip-overs are the leading cause of serious forklift fatalities. Even loads slightly over capacity increase tip-over risk because the stability margin is reduced before any dynamic factors (turning, braking, uneven floors) are added.

Can I increase capacity by adding counterweight?

No. Adding counterweight changes the truck's handling and center of gravity but does not increase its certified rated capacity. Both OSHA and ANSI prohibit modifying counterbalance measures without written manufacturer approval - and manufacturers rarely grant this approval because the change creates new instability risks in other directions. The rated capacity on the plate does not increase regardless of what is added to the rear of the truck.

Is the rated capacity in kilograms or pounds?

Most plates in the US show both. Many international manufacturers (including Hangcha) rate equipment in kilograms as the primary unit with pounds as a secondary figure. Always confirm which unit applies before using the number. A common error is reading a metric capacity plate (e.g. 2,500 kg = 5,511 lb) and treating 2,500 as a pound figure - this would lead to dramatically underutilizing the truck. Conversely, reading a pound figure as kilograms would mean catastrophic overloading.

Does a used forklift need a new capacity plate?

The original plate remains valid as long as it is legible and accurately reflects the current truck configuration. When buying a used forklift, inspect the plate immediately and verify it matches the actual truck - correct model, any attachments installed, and battery weight range for electric models. If a previous owner added attachments without updating the plate, that is a current compliance violation that must be corrected before the truck enters service at your facility.

What is the difference between the capacity plate and the residual capacity chart?

The capacity plate shows maximum rated capacity at the specified load center and a baseline lift height. The residual capacity chart - mounted separately on the mast - shows how that capacity changes as lift height increases. Both must be read together for any operation above a low travel height. The capacity plate alone is not sufficient for high-rack operations.