Triplex, duplex, or freelift: here's how to choose the right mast when renting a forklift
Most rental inquiries are about “2.5 tons or 3 tons,” but in practice, the mast if the work runs smoothly: Did you go through the door, do you get the Gantry height and remains the drive-through height safe? Below you will find a clear decision aid (without jargon) including a checklist for your application.
1) Mast basics: lifting height, overhead clearance and why this can go wrong
A forklift can be “strong enough” and still be unsuitable due to the wrong mast. The 3 measurements you always need:
- Stack height How high should the load *really* be placed? (shelf, mezzanine, dock, truck)
- Clearance height Maximum forklift height in “retracted” position (doors, roller doors, sprinklers, light lines)
- Free lift how much you can lift without the mast extending (crucial indoors)
Practice Problem #1: the forklift reaches the rack height, but Does not fit through the roller door.With the right mast choice, you'll avoid detours, waiting, and unsafe situations.
2) Duplex mast: simple, robust, and often perfect for standard work
One Duplex mast consists roughly of 2 mast sections. It is a popular choice when you standard lifting heights is needed and the drive-through height is not extremely low.
When duplex is a smart choice
- loading/unloading at ground level or dock height
- stacking to “normal” shelving heights
- exterior work or mix of interior/exterior
- You want maximum simplicity and stability
I'll follow up on this with duplex.
- Clearance height can be higher than with plywood
- with low doors freelift sometimes needed
- View can differ per mast type (working at heights = point of attention)
3) Triplex mast: higher lift height and often lower overhead clearance
One triplex mast usually has 3 mast sections. This often allows you to lift higher, while the mast in retracted position exactly more compact can remain. This is a popular choice for warehouses with racking and limited passage heights.
When triplex is the best choice
- You work with higher-level statements or multiple levels
- You have low rolling doors, light lines, or sprinklers
- You want extra flexibility (especially with changing locations)
Tip combine triplex often with freelift if you are working indoors and have to go under low obstacles.
4) Freelift: the gamechanger for indoors, docks, and low doorways
Freelift means you can move the forks (and load) up without the mast extending. This is especially important with:
- working in containers, trailers, or under overhead structures
- loading/unloading at docks with low clearance
- warehouses with sprinklers, light lines, or low mezzanines
- situations where visibility and safety are especially important
VA-certificate: all our machines come standard with VA-certified (safe and ready for use on-site).
5) Quick Guide: Which mast suits your situation?
Use this as a quick route to the correct mast. If you are unsure, it is smarter to your drive-through height en Required lifting height by passing and letting us match on a secure setup.
| Mast type | Ideal for | Pros | Pay attention |
|---|---|---|---|
| Duplex | Standard loading/unloading, “normal” stevedoring, mix of indoor/outdoor | Robust, simple, often sharply available for rent | Clearance height may be higher than plywood; check doors/route |
| Triplex | Higher shelves, warehouses with limited headroom | Higher lift with often more compact retracted mast | Specify lifting height + insertion (visibility/safety/route) |
| Freelift Option | Inside, docks, trailers/containers, low obstacles | Lifting without mast extension = safer and more practical | Provide free height (sprinklers/light lines/passages) |
Checklist for your application (copy/paste)
- Stack height ... meter (mounting level / placement)
- Clearance height … meter (lowest point: door, sprinkler, light line)
- Bet indoor/outdoor, floor/ground, hours per day, number of shifts
- Last: max weight + type pallet/crate
- Preference duplex / triplex / triplex + freelift (of “advice needed”)
- Location + date: Where and when does the forklift need to be there?
Frequently Asked Questions about Triplex, Duplex, and Freelift (Rental)
What is the biggest difference between duplex and triplex?
When is freeloading really necessary?
How do I determine the correct lifting height?
Do you also have electric forklifts with triplex/freelift?
Have the forklifts been inspected?
Do you want to choose the right forklift directly? Go to forklift rental contact us via contact.
