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Accommodation ladder, span length 2596mm (Technical supply specification)


1. General Information (Operating Conditions)

The accommodation ladder ensures reliable operation in marine environments under the following conditions:

– Ambient air temperature in the vessel’s operating area: –12°C to +35°C

– Storage temperature during winter non-navigation periods: down to –45°C

– Vessel mooring in freezing water areas


2. Purpose

Passenger embarkation and disembarkation from the vessel to the water or berth.

Accommodation ladder span length 2596 mm general arrangement side view
Accommodation ladder span length 2596 mm general arrangement side view

About

The Role of Accommodation Ladders in Modern Vessel Infrastructure

The modern accommodation ladder is a sophisticated piece of engineering at the intersection of shipbuilding, hydromechanics, and ergonomics. This equipment is engineered to account for vessel dynamics, changing water levels, and the critical requirement for safe personnel transfer within confined spaces. Unlike basic stationary solutions, an accommodation ladder operates as a mobile system capable of adapting to the changing geometry between the vessel and the landing surface.

Design Principles and Engineering Logic

Structurally, an accommodation ladder integrates a load-bearing steel structure, a flight section, and a drive system to ensure coordinated movement of all components. Design priority is given to the kinematics of the steps and the landing platform, as these specific assemblies directly determine transfer comfort and predictability. The engineering logic of these systems centers on maintaining a horizontal step position regardless of the overall inclination angle of the structure, requiring precise calibration and balanced mechanical operation.

Accommodation Ladder Integration in Vessel Layout

In marine and inland waterway practice, the accommodation ladder is considered a fully integrated system within the vessel’s general arrangement rather than an auxiliary component. It must seamlessly fit into the layout without disrupting functional zones or creating additional operational constraints. Consequently, the manufacturer’s experience in marine systems and their understanding of real-world operational scenarios are critical during product development.

Manufacturing Approach and Industry Expertise

Izhora Hydrosystems LLC acts as an original equipment manufacturer (OEM) of accommodation ladders, utilizing an engineering approach based on field experience and industry standards. Throughout design and manufacturing, the company focuses on balancing technological efficiency, robust engineering design, and seamless integration into vessel projects. This approach ensures the production of accommodation ladders that function as a logical extension of the vessel’s infrastructure rather than an isolated add-on component.


3. Scope of Supply

3.1 Accommodation Ladder (Span Length: 2596 mm)

3.1.1 Bill of Materials

ComponentQuantity
U-frame portal1
Ladder flight section1
Telescopic (slewing) landing platform1
Folding landing platform1
Flight section frame1
Steps12
Mechanical step drive2
Folding hydraulic cylinder2
Removable handrail2
Hoisting hydraulic cylinder2
Hydraulic power unit1
Control panel1
Accommodation ladder span length 2596 mm general arrangement top view
Accommodation ladder span length 2596 mm general arrangement top view

3.1.2 Main Parameters

ParameterValue
Maximum inclination angle relative to horizontal55°
Ladder portal height (at 55°)2260 mm
External ladder width1000 mm
Internal ladder width (between handrails)800 mm
Span length2596 mm
System dimensions2887 × 1740 × 1605 mm
Step typeInvolute
Guardrail typeRemovable handrail
Folding platform drive typeHydraulic
Rated flow10 l/min
Nominal pressure12 MPa
Maximum pressure16 MPa
Hydraulic tank capacity25 l
Electric motor power3 kW
Nominal voltage3×380 V

3.1.3  Spare Parts, Tools and Accessories (SPTA) Kit

Manufacturer’s standard for one-year operation — 1 set.

3.1.4 Documentation

Document TitleQuantity
Technical Passport1
Installation, Commissioning and Adjustment Instructions1
Operating Manual1
Shipboard Testing Program and Procedure1
Factory Acceptance Test (FAT) Protocol1
SPTA List1

3.1.5 Certificates

RMRS Certificate (Form 6.5.30) — 1 copy.

The accommodation ladder is delivered with an RMRS Certificate (Form 6.5.30) and an extract from the registry of Russian industrial products in accordance with the requirements of the Decree of the Government of the Russian Federation No. 719 “On Confirmation of Production”.

Accommodation ladder span length 2596 mm general arrangement front view
Accommodation ladder span length 2596 mm general arrangement front view

4. Additional Requirements

  • All electrical equipment installed outdoors has an IP56 protection rating.
  • All materials are resistant to the operating temperature range of –12°C to +35°C.
  • The pivoting steps feature an anti-slip coating. An independent hydraulic drive maintains the step surfaces parallel to the deck regardless of the ladder inclination angle to the horizontal.
  • The folding platform at the ladder end and the ladder steps feature drives that position the surfaces horizontally relative to the deck regardless of the ladder position.
  • The primary material for the steel structure (excluding hydraulic cylinders) is 09G2S grade steel. Stainless steel for marine applications is available as an option upon Customer request.
  • Right-hand or left-hand execution is available as an option.
  • The slewing flight section consists of a single section hinged to the platform, pivoting relative to it in the vertical plane up to an angle of 55° downward from the horizontal. Extension, slewing, lowering, and hoisting of the ladder components are performed by the integrated OEM hydraulic drive.
  • Passenger embarkation and disembarkation are supported from the shore, another vessel, or a berth located at varying heights relative to the deck level (within the operating angles above or below the horizontal), as well as in a “hovering” ladder mode to the water surface. In this mode, the folding landing platform is positioned parallel to the water surface. The ladder also enables boarding the vessel from tenders and other watercraft.

5. Manufacturer

Izhora Hydrosystems LLC


6. Warranty Period

12 months from the shipment date, unless otherwise specified in the contract.


Contacts

Phone: +7 (812) 339-61-68

Email: contact@i-hydro.tech