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The QUICKLOCK™ Aluminium Handrail and Walkway System

One of the most time and cost consuming areas in any offshore structure in terms of design, fabrication and maintenance must be the walkways and handrailings. These are traditionally built in carbon steel, need intricate welding and detailing and then continual maintenance for their lifetime. Doesn’t have to be this way….

The QUICKLOCK™ Aluminium Handrail and Walkway System

Aluminium Offshore has designed and produced a series of extrusions and components which can be quickly bolted and locked together using fasteners and a patented locking system. This allows the modular building block system to achieve an infinite number of layouts. No welding or special tools are involved for its installation. The system can also be retrofitted in place of steel or GRP railings and walkways. There’s more. Because it is made of aluminium alloy, QUICKLOCK™ is light yet strong, durable and maintenance free. Complying with the latest international design standards, QUICKLOCK™ is also aesthetically pleasing.

Quicklock handrail on stair for COSL HYSY943 project

Quicklock handrail and decking system on COSL HYSY943 project


  • Maintenance free marine aluminium alloy material.
  • Lightweight – approximately one third the weight of equivalent steel sections.
  • Height of handrail can be from 1-1.5m or custom designed to comply with special requirements.
  • The system can be either surface mounted or side mounted on to the support structure which can be in any material.
  • 100% weld-free construction — eliminates hot work
  • Designed in full compliance with international design codes and approved for offshore applications
  • Durable
    • Entire system is constructed in 6082 T6 series, high strength marine aluminium alloy with marine grade casting alloys and all fasteners in SS316.
    • 20-year warranty against structural corrosion.
    • No cracking or resin issues as with composites.
  • Modular Design
    • Time and cost savings during installation
    • Quick and easy to install in a fraction of the time taken for steel counterparts.
  • Improved aesthetics — system can be anodized or powder coated in a variety of colours to achieve your desired look.
  • 200 colours available — specify any colour you like for different areas of the installation. For example, yellow for escape walkways, red for fire hazard areas

Powder coated


  • Flexible – custom extrusions and specially casted 360º rotatable elbow joints allow for different angles in both horizontal and vertical directions. Optimized design/shape unlike GRP and steel.
  • Better surface finish — extrusions provide unblemished surfaces for better feel and finish.
  • The Quicklock™ aluminium walkway system offers a wide range of applications for walkways, platforms, stairs and ladders for marine and industrial usage.
  • Top fixing systems, no underneath access required
  • Special insulated clamping system to steel stringers, no drilling required
  • Over ten different walkway decking profiles available to cater for any load combinations.
  • Decking grip is lifelong, not sandblasted or based on epoxy addons.

Round holes

Elongated holes

  • Decking can be perforated or without holes, any hole size can be accommodated.

Load Bearing and Spanning Capacity

A variety of decking planks are available in Aluminium Offshore to suit different applications and requirements, including light duty, medium duty, heavy duty and super heavy duty types. Thanks to the flexibility of the production of aluminium extrusions, new design can always be developed when required too. The graph beside shows the range of the design loads and spans of some typical planks.

More Detail


Unlike steel gratings which are available in standard formats, aluminium deckings and gratings are produced using a completely different process: a shape is designed and cut into a steel mould. The mould is placed in the mouth of an extrusion press and hot aluminium is extruded thru the mould. The resulting shape is then cooled and heat treated to create the decking. As you can imagine, this method allows us to create complex shapes and incorporate many functions into them.


Marine aluminium alloy AA6082T6/equal has a yield strength of 260N/mm²; and a ultimate tensile strength of 310N/mm². The decking is designed to counteract deflections as per Codes (usually L/200) and have an equal or superior performance in terms of loading compared to steel. Superior, because the factor of safety for aluminium decking is greater than steel (since deflection governs the design and the tensile strength is equal to mild steel). We have available deckings to handle almost any loading required (we have even installed road bridges using the same deckings).


Decking is interlocked for greater load carrying ability and better load distribution and clipped down to the steel stringers. Interlocking is designed to allow decking to be fixed from the top. Galvanic reactions are removed using a self-adhesive neoprene tape which is applied to the steel beam top flange. The clipping system is made of aluminium alloy and the clips are powder coated to prevent dissimilar metal contact. All fasteners are stainless steel 316.


This system has been extensively used for offshore and marine projects and has been approved by all Class bodies DNV, ABS, LRS, BV. There are no prohibitions against the use of marine aluminium alloys in fixed structures in any offshore installation.

Design Standards

The components of the system are designed and manufactured in accordance to the following codes and requirements:

  • BS EN 1999-1-1, ‘Design of Aluminium Structures’
  • BS EN 1090-3, ‘Execution of Steel Structures and Aluminium Structures’
  • BS EN 1991-1-1, ‘Actions on Structures’
  • Norsok C-002, ‘Architectural Components and Equipment’
  • ISO 14122-3, ‘Safety of Machinery – Permanent Means of Access to Machinery’
  • BS 4592, ‘Industrial type metal flooring, walkways and stair treads’
  • BS 5395, ‘Stairs, ladders and walkways’
  • AS 1657, ‘Fixed Platforms, Walkways, Stairways and Ladders – Design, Construction and Installation’
  • AS/NZS 1170, ‘Structural Design Actions’


Quicklock® aluminium alloy deckingis supplied in up to 12m lengths and requires support in one direction only. Since the decking is custom designed, any load or deflection requirement can be catered for. Using the usual steel grating as an example and with UDL set at 7.5KN/m²/deflection L/200:

  • Steel grating — 38mm high, 915 x 915mm square – requires steel supports in two directions at 915mm centres ( L/200 deflection)
  • Aluminium grating – 45mm high, 250mm W x 6000mm L requires steel supports at 2500mm centres.

Aluminium decking therefore reduces the extent of steel under support required.

Track Records

The Quicklock® modular system has been used on various projects to date and is also (more on the standards) approved by exacting Norsok standards for offshore applications. They have been used on the following projects to date:

  Project Customer
1. Gudrun Statoil Norway
2. Ekofisk 2/4L Philips Petroleum, Norway
3. Bulan-Bulan Brunei Shell Petroleum
4. H3031 — Cat D Drill semi-rig Statoil, Norway
5. H3032 — Cat D Drill semi-rig Statoil, Norway
6. Zawtika
7. West Linus North Atlantic Drilling Ltd, Norway
8. Songa Delta Songa Offshore, Norway
9. Balai Cluster BC Petroleum, Malaysia
10. Champion A2 Brunei Shell Petroleum
11. Champion B2-3 Brunei Shell Petroleum
12. B348 Keppel Fels
13. Edvard Grieg Lundin
14. ongoing Gina Krog Statoil Norway
15. ongoing IvarAasen Det Norske Oljeselskap
16. ongoing Martin Linge Total


Huge number of decking profiles available to suit almost any span and load combination. Perforated or unpunched. Maintenance free aluminium alloys.

Quicklock modular handrails and decking system on the Ekofisk project

Handrails on stairs are a breeze with the new modular quick-fit system

Quicklock system on Ekofisk project

Ekofisk underhelideck area

Quicklock system on helideck underneath walkway, under construction

Quicklock and Handrail system on COSL HYSY943 project

Quicklock system on COSL HYSY943 project

Quicklock handrail on stair for COSL HYSY943 project

Superb fit and finish make even architects, installation and maintenance crew love this system

Over 200 RAL colours available

Gudrun project for Statoil, perimeter walkway for helideck under construction

I was personally Impressed by the thinking behind the fire containment properties of the helideck to provide passive safety on its own

Bernard Valois, Chairman of the Rescue Fire Fighting Working Group

The fire demonstration was well-organized and very convincing. The design offers weight and maintainability advantages, as well as the very effective fire retardant system.

John Hannay, Area Director
United Technology Sikorsky

We are pleased to award you with a Special Recognition Award (Safety) Certificate for achievement in the field of HSE in the category “Aviation Fires Risk Downrated” for 2005.

Yousef Omair bin Yousef, CEO

…must say that I was impressed by the fire containment capabilities of the deck. The effectiveness of water in putting out the fire was clearly significant.

Jim Tuggey, Director
Bell Helicopter

The staff at AOPL were extremely professionall, very efficient and timely in all their dealings with us, from negotiations to design details and construction, and right through to certification.

Dr. John Gilmore, Project Director
Mater Health Services

All the pilots at our heliport have unanimously expressed praise for this new helideck, especially the fit and finish of this product, which replaces an old rust-pront deck. We trust the high standards of design and manufacture will be upheld…

Captain Raz Zoers, Head of Aircraft Services
Shell Brunei

I expect any potential improvements to what is already an excellent product will only emerge as a result of operating experience.

Simon Fraser-McKenzie, Senior Development Engineer
Shell UK
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