Fork frames, carriages, pallet fork sets, pipe forks, coil rams — the terminology alone confuses a lot of operators. Here's what each system actually is and when the distinction matters.
Most operators buy their first set of pallet forks without thinking much about the frame — they just want something to pick up pallets. That works fine for general material handling. But when the loads get unusual — long pipe, steel coil, round bale — the fork frame choice starts to matter. And when operators are running a skid steer in a warehouse, yard, or industrial setting, the difference between a carriage with interchangeable tines and a fixed pallet fork set becomes a real productivity factor.
Let's start with the terminology, because it's not consistent across the industry.
The "fork frame" is the structural assembly that attaches to the skid steer's quick attach and holds the fork tines. It's the backbone of any fork-based lifting attachment. The frame provides the mounting points for the tines, the structural capacity rating, and (in more sophisticated designs) the mechanism for adjusting tine spacing.
Forks, technically speaking, include both the frame and the tines together as a system. But in common usage, "pallet forks" often means the whole assembly — frame plus tines — while "fork frame" sometimes refers specifically to the frame without tines, or to a higher-capability frame designed for interchangeable use.
The confusion also comes from ISO standardization: ISO 2328 defines a standard fork carriage for industrial forklifts, and some skid steer fork frames use ITA (Industrial Truck Association) hook-style mounts that let users swap tines on and off — a genuinely different system from the standard pallet fork set where the tines are fixed or pinned directly to the frame.
In skid steer terminology, a "carriage" often refers to a fork frame that uses ITA-style hook tines — tines that slide onto the carriage bar and are locked by a pin or latch. This is the forklift-standard method, and it offers a genuine advantage: you can swap tines off and on without tools, changing from standard 48-inch tines to 60-inch tines, or swapping pallet forks out for pipe forks or coil tines, in a few minutes.
Carriages come in ITA carriage classes (Class 1 through Class 4) that correspond to capacity and bar size. For skid steers, Class 2 and Class 3 are most common. Class 2 handles up to approximately 5,500 lbs; Class 3 handles up to 10,000 lbs. The skid steer machine's rated operating capacity (ROC) ultimately limits how much you can actually pick up — the carriage class just needs to match or exceed the machine's capacity.
The carriage system is the more expensive option. A quality ITA-style fork carriage for a skid steer runs $1,800–$3,500 CAD new. The benefit is flexibility: one frame, multiple tine configurations.
The standard pallet fork set — what most people buy — is a frame with two tines that are bolted, welded, or pinned to the frame at the factory. The tines may be adjustable in spacing (sliding in channels on the frame) or fixed. The whole assembly quick-attaches to the skid steer as a unit.
This is simpler and cheaper than a carriage system. A solid pallet fork set for a 65–80 HP skid steer — 5,000–6,000 lb capacity, 48-inch tines, adjustable spacing — runs $600–$1,400 CAD new. Used sets in decent condition appear regularly on Kijiji and Facebook Marketplace for $300–$700.
The tradeoff: you can't swap tines. If you need pipe handling capability, you buy a separate pipe fork attachment. If you need longer tines, you buy a different pallet fork set. The carriage system avoids this by letting the same frame handle multiple tine types.
For most acreage owners, construction contractors, and farmers who primarily handle palletized loads and occasional round bales — the standard pallet fork set is entirely adequate. The carriage system earns its premium in higher-use, specialized material handling environments.
Whether you're running a carriage or a standard pallet fork set, adjustable tine spacing is worth having. Standard pallets are 40" × 48" — but you'll also encounter EUR pallets (31.5" × 47.2"), custom industrial pallets, and non-standard loads that need tine spacing optimized for the pickup.
Adjustable tines also matter for safety: tines that are too close together on a wide pallet create a tipping moment. Tines that are too far apart miss the pallet notches. Getting the spacing right reduces the chance of load drop and makes the pickup point distribution better.
On standard pallet fork sets, tines typically adjust in 4–6 inch increments by repositioning in slotted channels and re-pinning. It takes about 2 minutes per tine. On ITA carriage systems, the adjustment is continuous — slide the hook tine to the right position and lock it. Faster and more precise.
This section matters more than most operators think it does. Fork attachments have two capacity numbers that need to be respected: the attachment's rated capacity, and the skid steer machine's rated operating capacity (ROC) at the specific load center.
Load center is critical. Fork capacity ratings assume the load's center of gravity is a specific distance from the face of the carriage — typically 24 inches for standard ITA forks. If you're lifting a load with a center of gravity farther out (a long pipe with its center at 36" or 48" from the carriage face, for example), the effective capacity drops. The manufacturer's capacity chart shows this reduction.
Skid steer manufacturers publish ROC curves for their machines at different lift heights. A machine rated for 3,000 lbs at ground level carries that load at lower heights and a reduced figure at full height. This matters for overhead work and for loading trailers — you're sometimes lifting at extended arm with reduced capacity.
Standard pallet tines are flat on the top surface and work fine for pallets and even square bales. But round pipe, conduit, and lumber tend to roll off flat tines — particularly if the tines are angled slightly or the load shifts. Pipe forks (also called pipe tines) have a shallow V-groove along the upper surface that cradles round material and prevents rolling.
For a skid steer used in pipeline work, well servicing, electrical construction, or utility installation in Canada — where moving pipe, conduit, and wire drums is part of the daily work — pipe tines are a meaningful upgrade over standard tines. You can run pipe tines on standard pallet work; the groove doesn't affect normal pallet handling. So if you know you'll handle pipe regularly, pipe tines make sense as your primary set.
Pipe fork tines are available as: replacement tines for ITA carriage systems (where you swap them in), or as a complete fork set assembly. The ITA route is cleaner if you use both pipe and standard pallet configurations.
In the oil and gas service sector in Alberta and Saskatchewan, pipe forks on skid steers are standard equipment. Wellsite contractors doing tubular handling use them daily. If you're working in that sector and still using flat pallet forks, you're creating unnecessary risk.
Steel coil — the large wound rolls of sheet steel used in manufacturing and construction — is a specialized material handling challenge. Coils are heavy (often 2,000–8,000 lbs), round, and have a center hole. They roll if placed on a flat surface and can't be grabbed by standard forks without risk of damage or slipping.
A coil ram is an entirely different tool from pallet forks. It's a horizontal mandrel (a horizontal round bar or conical ram) that inserts through the coil's center hole. The ram bears the load through the coil's ID (inner diameter), allowing safe horizontal pick and carry. This is forklift handling 101 for steel service centers and metal fabrication shops.
For skid steers used in metal fabrication yards, steel warehouses, or construction sites receiving steel coil, a coil ram is the right tool. You can't safely handle coil with pallet forks — the coil will roll off or damage the fork tines trying to support it from below without a proper cradle.
Coil cradles (two curved saddles on a fork frame that support the coil without piercing it) are an alternative to the ram for situations where the coil's core shouldn't be contacted. These are common in aluminum and stainless handling where scratching the core matters.
Beyond pipe forks and coil rams, specialty fork configurations include:
The ITA carriage system supports all of these via tine swap — one frame, multiple configurations. The standard fixed-tine pallet fork set means buying a separate specialized attachment for each application.
| Machine ROC | Recommended Fork Capacity | ITA Carriage Class | Typical Tine Size |
|---|---|---|---|
| Up to 2,000 lbs (small compact) | 2,500–3,000 lbs | Class 1 | 42"–48" tines |
| 2,000–3,500 lbs (mid skid steer) | 4,000–5,000 lbs | Class 2 | 48"–54" tines |
| 3,500–5,000 lbs (full-size skid steer) | 5,500–7,000 lbs | Class 2–3 | 48"–60" tines |
| 5,000+ lbs (large CTL) | 7,000–10,000 lbs | Class 3 | 54"–72" tines |
Matching fork capacity to the machine's ROC isn't just about not overloading the forks — it's about making sure the machine's hydraulic and structural limits are the limiting factor, not the attachment. An undersized fork frame on a large machine is a liability; the machine can exert forces the frame wasn't designed for, particularly in rough terrain or when hitting obstacles during travel.
Don't overlook tine length. Standard 48-inch tines are the go-to for pallets. But if your work involves handling loads that don't have pockets — loose material, sheet goods, awkward shapes — longer tines provide more support surface and better load stability, at the cost of more pronounced load center shift and reduced effective capacity.
Buy a quality adjustable-tine pallet fork set matched to your machine's capacity. Don't buy cheap — tine welds on budget forks crack under dynamic loading, and the safety consequences are serious. Brands like Bobcat, Paladin, and Worksaver make solid sets. Upgrade to a carriage system only when you have a clear need for tine swapping. Most operators never need it.