Grab, precast, pickling and cleanroom cranes — the four configurations that replace the standard hook with something that actually fits the job. Written for plant managers, project engineers and buyers sizing a special purpose crane for bulk handling, concrete production, acid lines or clean manufacturing.
Sizing a special crane comes down to one question first: what is the material, and what is the environment? Grab cranes cover 5-50 tons for coal, ore, grain, scrap and waste; precast cranes run 10-100 tons with spans of 10-40 m for concrete panels and beams; pickling cranes handle 5-30 tons over acid lines; cleanroom cranes serve 0.5-10 tons in ISO Class 5 environments. The global overhead crane market, worth USD 5.18 billion in 2023, is projected to reach USD 8.20 billion by 2030 at a 6.8% CAGR — and the special crane segment is where that growth concentrates, because standard hook cranes simply cannot do bulk grabbing, synchronized panel lifting, acid resistance or particle-free operation. This guide walks through each configuration with 2026 prices and closes with a specification template that gets you comparable quotes.
The first decision is not capacity — it is the application. All four types look similar from outside: an overhead crane with a trolley and hoist. The difference is the end effector and the environmental design, and choosing the wrong type means a crane that is either dangerous or useless in your process.
| Type | Capacity | What it handles | Typical plants |
|---|---|---|---|
| Grab crane | 5 - 50 t | Coal, ore, grain, scrap, waste, fertilizer | Ports, power plants, steel mills, waste-to-energy |
| Precast crane | 10 - 100 t | Concrete panels, beams, slabs, columns, pipe piles | Precast plants, PC component yards, bridge element production |
| Pickling crane | 5 - 30 t | Coils and baskets over acid tanks | Steel pickling lines, annealing & pickling, galvanizing |
| Cleanroom crane | 0.5 - 10 t | Wafer steppers, pharma materials, medical devices | Semiconductor fabs, pharma, medical device, lithium battery dry rooms |
One pattern we see in enquiries: buyers come with a capacity number before they describe the process. Start from the material and the environment, and the capacity follows. A scrap yard and a grain terminal both need a grab crane, but the duty class and bucket design are completely different — which is why the sizing detail below matters.
Grab cranes replace the hook with a clamshell bucket, and the sizing mistake that costs most is treating the bucket's rated tonnage as the crane's working capacity. The crane has to lift the bucket steel plus a fully loaded material volume every cycle — a 5 m³ coal bucket at roughly 0.8 t/m³ carries about 4 tons of material, but a scrap bucket of the same volume can weigh 2-3 times more when loaded. Size the crane for the heaviest fully loaded bucket, and keep normal cycles under 80% of rated capacity.
Bucket type follows the material. Double-rope mechanical grabs are the workhorse for coal, ore and grain — simple, durable, and cheap to maintain. Multi-rope or hydraulic grabs handle sticky or variable material like scrap and mixed waste, where the closing force needs to adapt. Electric grabs give precise discharge control for feeding hoppers or furnaces. Anti-sway control (mechanical or electronic) is worth specifying for ports and terminals where operators place the bucket into moving vessel holds.
| Material | Bucket type | Duty class | Typical capacity |
|---|---|---|---|
| Coal, ore, grain | Double-rope mechanical | A6 - A7 | 5 - 32 t |
| Scrap, mixed waste | Multi-rope / hydraulic | A7 - A8 | 10 - 50 t |
| Fertilizer, chemicals | Double-rope, sealed | A6 - A7 | 5 - 20 t |
Duty class matters more here than on any standard crane. Grab cranes run constant cycles — grab, lift, travel, discharge, repeat — so an A6 crane doing A8 work will fatigue its structure and bucket rigging years early. If the plant runs two or three shifts of continuous feeding, go straight to A7 or A8 and spec abrasion-resistant steel on all wear surfaces. Our special crane cost & TCO guide shows how much that duty class decision adds over a 10-year life.
Precast cranes are sized differently because the load is long, flat and heavy. A 12 m wall panel has to lift level — one end lifting before the other cracks the panel — so the crane needs either two synchronized hoists or a spreader beam, and the span must cover multiple casting beds so the crane can move panels from bed to storage without re-handling.
Span and lift height are set by the plant layout, not by the crane catalog. SIEC precast cranes run spans of 10-40 m with lift heights of 6-20 m, and the practical rule is: measure the widest casting bed arrangement, add maneuvering clearance on both sides, and that is your span. Lifting speed is deliberately slow — VFD-controlled 0.5-8 m/min — because the positioning accuracy matters more than speed when you are placing a 20-ton beam onto storage racks within centimeters. Multi-hoist synchronization is the feature to verify in the quotation: ask how many hoists, how they synchronize, and what attachment (vacuum lifter, tilting frame, spreader beam) is included for each load type.
| Typical load | Capacity | Configuration |
|---|---|---|
| Wall panels, floor slabs | 10 - 20 t | Single hoist + spreader beam |
| Beams, columns | 20 - 30 t | Dual-hoist synchronized |
| Segmental bridge girders | 30 - 50 t | Dual/triple-hoist + vacuum lifter |
| Pipe piles, large modules | 50 - 100 t | Triple-hoist + tilting frame |
Power supply is worth confirming early for export plants — 380V-690V, 3-phase, 50/60 Hz is common, and getting it wrong at order time means a transformer and re-wiring bill later. Also ask about the optional stack management system if the yard stores many panel types; inventory tracking pays for itself quickly in a busy PC component yard.
Pickling cranes work over open acid tanks, and the sizing decision here is less about capacity — 5-30 tons covers most coil and basket handling — and more about how much corrosion protection to specify. The acid fumes attack everything: structure, fasteners, electrical enclosures, wire ropes, pulleys and rail.
The protection package has layers, and they are all worth specifying explicitly in the quotation. Epoxy-coated structure is the baseline. Stainless steel internals (fasteners, hook block, rope fittings) remove the corrosion weak points. IP54 electrical enclosures handle light fume exposure; IP55 with a pressurized control panel is for continuous fume zones where acid vapor would otherwise creep into the cabinet. Corrosion-resistant rail covers protect the runway, and the pressurized cabin option keeps operators safe over the tank line.
| Exposure level | Protection spec | Typical capacity |
|---|---|---|
| Light / occasional fume | IP54, epoxy-coated, SS fasteners | 5 - 10 t |
| Continuous fume zone | IP55, full SS components, pressurized panel | 10 - 20 t |
| Severe / full-line exposure | IP65 critical, full corrosion package | 20 - 30 t |
The honest advice: skipping the protection upgrade to save 10-15% on the equipment price usually ends in a structural re-coat or component replacement within 3-5 years, and that bill is bigger than the upgrade was. If the plant runs continuous pickling, budget for the full stainless package from the start.
Cleanroom cranes are the mirror image of pickling cranes: instead of keeping acid out, they keep particles in. A standard industrial crane sheds paint flakes, grease and wear debris, which is why semiconductor fabs, pharma production and lithium battery dry rooms need a crane built to ISO Class 5 (Class 100) — no more than 3,520 particles per cubic meter at 0.5 microns and larger.
Materials and construction are the specification: 304/316 stainless steel or aluminum alloy, sealed bearings, crevice-free surfaces with no dirt accumulation points, anti-static chain or rope with grounding, cleanroom-grade particle-free grease, and low-noise VFD drives under 60 dB. Capacities run 0.5-10 tons with spans of 3-20 m. For semiconductor fabs handling wafer steppers, specify the anti-static package and touch-screen or automatic control; for pharma, the GMP-compliant material transfer in sterile production areas is the requirement that shapes the design.
A cleanroom crane costs 3-5 times more than a standard crane of the same capacity because of the materials and the validation — an independent contamination control expert measures particle emissions with a laser particle counter before delivery. If your facility is ISO Class 6 or 7 (less strict), a lighter cleanroom spec may pass; if it is Class 5 or better, do not compromise on the 316 stainless and sealed-bearing package. Our cleanroom crane guide for semiconductor & pharma goes deeper into ISO class definitions and validation requirements.
Duty class (FEM / ISO 4301: A3 through A8) tells you how many hours a day the crane can work and how often it lifts near rated load. Standard workshop cranes sit at A3-A5; special cranes skew heavy because the applications are continuous.
| Duty class | Typical special crane use |
|---|---|
| A3 - A4 | Occasional pickling or cleanroom maintenance lifts |
| A5 - A6 | Single-shift precast production, port grab cranes |
| A7 - A8 | Continuous scrap charging, multi-shift bulk handling |
If you do not know your operating hours, count them for a week before ordering. An A6 crane doing A8 work will fail structurally years early, and re-rating a crane after delivery is not possible — the structure and components are sized for the class at manufacture.
Prices below are 2026 FOB estimates for CE-certified Chinese special cranes, excluding freight, installation and building work. Expect installed cost to run roughly 1.3 to 1.8 times the equipment price once foundations, rails, electrification and installation labor are added. The global overhead crane market's 6.8% CAGR to 2030 is driven in part by exactly these specialized segments — ports, precast construction and clean manufacturing are all expanding.
| Type & capacity | Price range (FOB) | Key spec |
|---|---|---|
| Grab 5 t | USD 30,000 - 45,000 | Double-rope mechanical, A6 |
| Grab 20 t | USD 65,000 - 95,000 | Electric grab, A7 |
| Grab 50 t | USD 110,000 - 150,000 | Hydraulic, A8 |
| Precast 10 t / 15 m | USD 50,000 - 75,000 | Single hoist + spreader |
| Precast 50 t / 30 m | USD 160,000 - 240,000 | Triple-hoist + spreader beam |
| Precast 100 t / 35 m | USD 220,000 - 300,000 | Triple-hoist + tilting frame |
| Pickling 5 t | USD 40,000 - 55,000 | IP54, epoxy-coated |
| Pickling 30 t | USD 130,000 - 180,000 | IP65 critical, full corrosion |
| Cleanroom 0.5 t | USD 25,000 - 35,000 | ISO 5, aluminum, sealed bearings |
| Cleanroom 10 t | USD 90,000 - 120,000 | ISO 5, 316 SS, electropolished |
Two notes on comparing quotes. First, verify the duty class and protection spec are identical — an A8 grab crane costs far more than an A6 of the same tonnage, and comparing them as the same product misleads you. Second, ask what the price includes: bucket type, control mode, cabin, rail covers and anti-sway are all line items that change the total. Our special crane cost & 10-year TCO guide breaks down installed cost, maintenance by duty class and energy cost in detail.
A vague enquiry gets a vague quote, and for a custom crane that is how budget overruns start. Send every supplier the same items:
Add a sketch or layout drawing if you have one — for precast cranes especially, the bed arrangement determines the span, and a simple dimensioned drawing saves a round of clarification emails.
A special purpose crane replaces the standard hook with a purpose-built end effector or adds environmental protection. The four common types are grab cranes (5-50 tons, for coal, ore, grain, scrap and waste), precast cranes (10-100 tons, for concrete panels, beams and pipe piles), pickling cranes (5-30 tons, acid-fume resistant) and cleanroom cranes (0.5-10 tons, ISO Class 5). If your load is loose bulk material, a long flat panel, or your environment has acid fumes or particle limits, you need a special crane.
Size for the heaviest fully loaded bucket, not the bucket's rated tonnage, and keep normal cycles under 80% of rated capacity. Double-rope mechanical grabs suit coal, ore and grain; multi-rope or hydraulic grabs suit sticky scrap and waste; electric grabs give precise discharge. Match duty class A6-A8 to your actual operating hours.
Precast cranes commonly span 10-40 m with lift heights of 6-20 m, sized to cover casting beds and storage in one travel path. Long loads need two synchronized hoists or a spreader beam so they lift level. VFD-controlled speeds of 0.5-8 m/min give the precise placement concrete handling demands.
Epoxy-coated structure, stainless steel internals, IP54/IP55 sealed electrical enclosures, pressurized control panel, corrosion-resistant wire ropes and rail covers. IP54 for light exposure, IP55 with full stainless for continuous fume zones, and a pressurized cabin for operator safety over the tank line.
Cleanroom cranes are built to ISO Class 5 (Class 100) or better — no more than 3,520 particles per cubic meter at 0.5 microns. Construction is 304/316 stainless or aluminum with sealed bearings, anti-static chain/rope and low-noise drives under 60 dB. Specify the anti-static package for semiconductor fabs and GMP compliance for pharma.
CE-certified special cranes range from USD 25,000 to 300,000 FOB. Grab cranes: 5 t USD 30,000-45,000, 50 t USD 110,000-150,000. Precast cranes: 10 t USD 50,000-75,000, 100 t USD 220,000-300,000. Pickling cranes: 5 t IP54 USD 40,000-55,000, 30 t USD 130,000-180,000. Cleanroom cranes: 0.5 t USD 25,000-35,000, 10 t USD 90,000-120,000. Installed totals run 1.3 to 1.8 times the equipment price.
Send us your material, environment, capacities and plant layout — our engineering team will confirm the right crane type, capacity, duty class, protection package and control options before you commit. Quotes include a full specification sheet you can compare with other suppliers.
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