CAT CLASS: HQ-10159

35-60 ton Rough Terrain Crane

The 35-60 ton rough terrain crane is the dominant size in commercial construction, handling the majority of steel erection and mechanical equipment picks on job sites. With lifting capacities spanning 31.8–54.4 tons and reach extending to 53.9 feet, this class balances substantial capacity with site maneuverability. It sits squarely in the middle of the rough terrain ladder, between compact sub-35-ton units and heavy 60-100 ton machines.

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Pick a size class — capacity and reach differ across the range.

Key specifications

Specification	Typical range	What it means
Lifting capacity	32–54 tons	Covers packaged rooftop units, structural steel bundles, and most prefabricated mechanical assemblies.
Max reach	5–54 feet	Horizontal reach varies widely by boom configuration; full extension supports placement over roof parapets and set-backs.
Machine count	27 models	Deep bench from Grove, XCMG, Tadano, Terex, and Sany reflects strong industry demand for this size.

How to choose

This size is the default specification for commercial steel erection, HVAC rooftop unit placement, and mechanical equipment installation where picks exceed 15 tons but remain under 50 tons at typical radii. Step down to the Up to 35 ton Rough Terrain Crane for residential framing, lighter precast panels, or congested sites where a smaller footprint is essential. Step up to the 60-100 ton Rough Terrain Crane when pick weights approach or exceed 50 tons, when reach beyond 50 feet is critical, or when lifting at extended radii demands greater chart capacity.

What this size handles

Setting 20–40 ton packaged HVAC units on commercial rooftops
Erecting structural steel for mid-rise office and retail buildings
Placing precast concrete columns and beams for parking structures
Installing large industrial compressors and process equipment
Positioning electrical transformers and switchgear at substations
Handling ductwork bundles and mechanical assemblies during plant expansions

Safety & operation

Load charts vary significantly by boom length, angle, and outrigger configuration; operator must verify capacity at actual working radius
Outrigger deployment on stable, level ground is mandatory; pads or cribbing required to distribute loads on soft or uneven surfaces
Swing radius and tailswing clearance demand exclusion zones; spotter communication is standard for blind lifts and congested areas
Ground conditions, wind speed, and dynamic loading affect safe working load; site-specific lift plans are industry practice for critical picks

Transport & logistics

Typically self-transports to regional job sites under own power; road-legal in most jurisdictions with appropriate permits
Long-distance mobilization often uses lowboy or RGN trailers; combined machine weight requires Class 8 tractor
Boom and counterweight configurations may require partial disassembly for over-the-road compliance depending on state regulations

Power & supply

Diesel-powered with onboard fuel tanks supporting full-shift operation; typical consumption ranges from 5–10 gallons per hour under load
No external power required; engine drives hydraulic systems for hoisting, boom extension, and swing functions
Refueling access needed for multi-day projects; some models include auxiliary generator outputs for site power

Frequently asked

What differentiates a 40-ton from a 55-ton model in this class?

Rated capacity at minimum radius; the 55-ton model offers greater chart capacity at extended boom lengths and higher radii, allowing heavier picks farther from the machine centerline.

Can this size handle typical rooftop unit replacements?

Yes, the 35-60 ton class is the industry standard for commercial RTU placement; most 15–35 ton rooftop packages fall well within chart capacity at typical building set-backs.

When does a project require the 60-100 ton class instead?

When individual pick weights exceed 45–50 tons, when reach beyond 50 feet at load is necessary, or when chart capacity at extended radius becomes the limiting factor rather than maximum rated capacity.

Compare popular models

Find by spec →

Normalised to the same units. A dash means the figure was not published.

Model	Lifting capacity	Max reach
Grove GRT655	110,231 lb (50 t)	34.9 ft (10.6 m)
Grove GRT655L	110,231 lb (50 t)	35.3 ft (10.8 m)
Grove RT540E	79,366 lb (36 t)	32 ft (9.8 m)
Sany SRA550A	99,208 lb (45 t)	53.9 ft (16.4 m)
Tadano AC 2.040-1	79,366 lb (36 t)	34.3 ft (10.5 m)
Tadano AC 3.045-1 City	99,208 lb (45 t)	25.5 ft (7.8 m)