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A boat jib crane is a marine-grade lifting solution designed specifically for docks, marinas, shipyards, and offshore platforms — where saltwater corrosion, confined space, and dynamic loads demand equipment built to a different standard. HaiTai Crane’s boat jib cranes deliver 0.5 to 20 tons lifting capacity, 180° to 360° rotation, and full C4–C5 marine corrosion protection from structural steel to electrical enclosures.

Quick Reference: Boat Jib Crane Specifications

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What Is a Boat Jib Crane

Structure and Operating Principle

A boat jib crane consists of four core components: a vertical mast (column), a horizontal jib arm (boom), a rotation mechanism, and a hoisting unit. The mast is anchored to a concrete dock foundation or structural wall; the jib arm extends horizontally over the water or work area and rotates through a defined arc — 180°, 270°, or a full 360° depending on the mounting configuration and site geometry.

The hoist — either an electric chain hoist or wire rope hoist — travels along the jib arm, allowing the operator to position the hook precisely over the load before lifting. This combination of rotation and trolley travel gives a boat jib crane full coverage of its working radius without requiring the crane to move along a track or rail, which makes it particularly effective in space-restricted dock and marina environments.

How It Differs From a Boat Lift Gantry Crane

Boat jib cranes and boat lift gantry cranes serve different operational profiles. A gantry crane straddles the vessel on two portal legs and requires significant apron width and a prepared rail or runway surface. A jib crane occupies a single column footprint and needs no ground-level rail infrastructure — making it substantially lower in both civil works cost and installation time.

For marinas, yacht clubs, and small shipyards handling vessels up to 20 t, a jib crane typically offers the better cost-to-capability ratio. For commercial shipyards handling vessels above 50 t with multi-point lifting requirements, a gantry configuration is generally more appropriate.

Key Features of HaiTai Boat Jib Cranes

Защита от коррозии морского класса

Salt spray is the primary structural threat in any coastal installation. HaiTai boat jib cranes are finished to C4–C5 corrosion category per ISO 12944, using a three-layer system: hot-dip galvanizing on structural steel, epoxy intermediate coat, and marine-grade topcoat. Electrical enclosures are rated IP65 minimum to prevent moisture ingress. Core mechanical components — bearings, gearboxes, hoist motors — are specified for marine environmental exposure, not adapted from standard industrial product lines.

This is the specification difference that determines whether a crane lasts 3 years or 15 years on a working dock.

360° Rotation with VFD Control

All motorized rotation models are equipped with variable frequency drive (VFD) control on both the slewing mechanism and hoist. VFD control eliminates the mechanical shock loads that occur with direct-on-line motor starting — a critical feature when handling boats, where sudden load movement can cause vessel damage or operator safety incidents. Rotation speed is adjustable; load positioning is smooth and controllable from full-radius swing down to fine-increment adjustment.

Multiple Mounting Configurations

HaiTai boat jib cranes are available in four mounting configurations to match different site conditions:

• Column-mounted (floor-anchored): standard configuration for solid concrete docks; requires foundation anchor bolt embedment to structural engineer’s specification
• Wall-mounted: fixed to a structural quay wall or building column; reduces footprint but requires wall structural capacity verification
• Dock-embedded: mast integrated into the dock structure during construction; maximum stability for permanent installations
• Floating dock: available with reinforced base plate and ballast provisions; requires dock structural engineering sign-off

Системы безопасности

Every HaiTai boat jib crane is supplied with a standard safety package compliant with EN 15011 и FEM 1.001:

• Overload protection limiter (cuts power at 110% SWL)
• Upper and lower hook travel limit switches
• Emergency stop on pendant and remote control
• Anti-sway control (available on electric models)
• Fail-safe brake on hoist motor
• Storm anchor provisions for outdoor installations

Сценарии применения

Marinas and Yacht Clubs

For facilities handling recreational vessels in the 0.5–10 t range, a column-mounted boat jib crane with 180°–270° rotation covers the standard dock-side lifting requirement: boat launching, retrieval, mast removal, and outboard engine servicing. A 5 t unit with a 6 m jib covers most vessels up to 40 ft LOA. Radio remote control allows single-operator handling, reducing labor cost on every launch cycle.

Shipyards and Dry Docks

Shipyard applications demand heavier capacity and higher duty cycles. A 10–20 t boat jib crane positioned at a dry dock entrance handles small vessel placement and removal, equipment transfer, and component lifting during repair cycles. For shipyards processing multiple vessels per day, HaiTai recommends FEM 3m duty class specification and wire rope hoist over chain hoist for extended service life under high-frequency operation.

Ports and Commercial Docks

Port installations handling workboats, patrol vessels, and small cargo craft benefit from 360° rotation — allowing the crane to serve both the waterside and landside of a dock without repositioning. A 15–20 t unit with a 8–10 m boom covers most workboat handling requirements and can be equipped with an optional boat lifting frame and sling set for vessels without dedicated lifting points.

Onboard Vessel Applications

Deck-mounted boat jib cranes serve offshore vessels, naval platforms, and large yachts for handling tenders, rescue craft, and deck cargo. These installations require compliance with class society certification — CCS, ABS, BV, DNV, or LR depending on vessel flag state — and are supplied with classification society survey documentation on request.

How to Choose the Right Boat Jib Crane

Step 1 — Confirm Your Maximum Vessel Weight

Apply a minimum 25% margin above the heaviest vessel you will handle. A 4 t vessel requires a 5 t crane. This margin absorbs dynamic load factors during water-to-land transfer — the load does not lift clean in marine conditions; wind, wave action, and water drainage all add momentary overload. Specifying at exactly your vessel weight is an underspecification.

Step 2 — Determine Required Jib Length

Jib length must clear the dock edge and reach the centerline of the vessel’s lifting point — typically the keel or dedicated lifting eyes. Measure from the column centerline to the vessel’s furthest lifting point, add 0.5–1 m clearance, and that is your minimum jib length. For dock edges with fender systems or safety rails, add fender projection to this measurement.

Step 3 — Select Rotation Angle

If the crane serves only one side of a dock (waterside lifting only), 180° rotation is sufficient and mechanically simpler. If the crane needs to transfer loads from water to a land-side staging area, 270° or 360° rotation is required. Confirm this against your site plan before specifying — adding rotation range after manufacture is not feasible.

Step 4 — Specify Duty Class

Step 5 — Confirm Installation Environment

Coastal saltwater environments require C4–C5 corrosion specification as a minimum. Tropical or offshore environments with continuous salt spray exposure should specify C5-M (marine) per ISO 12944. Confirm also the available power supply (voltage, frequency, available amperage) before equipment order — HaiTai supports global voltage standards but needs confirmed site supply data for motor specification.

Почему стоит выбрать HaiTai Crane?

Компания HaiTai Crane, обладающая более чем 20-летним опытом производства и экспортом в более чем 80 стран, поставляет сертифицированные по стандартам CE и ISO 9001:2015 подъемные решения для портов, верфей и яхтенных пристаней по всему миру. От стандартных конфигураций до полностью разработанных по индивидуальному заказу конструкций, наша техническая команда адаптирует каждый кран к условиям вашей площадки и эксплуатационным требованиям.

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Специалист по крановым решениям · HT Crane

Специализируемся на экспортных решениях в области козловых кранов, портовых кранов, контейнерных кранов, морских судоподъемников и мостовых кранов. Более 10 лет помогаем глобальным клиентам с предпродажными консультациями, подбором грузоподъемности и конфигурацией оборудования с учетом специфики объекта.

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