Articulating A-Frame to Save Time and Improve Safety21/12/2011
|To make A-frame adjusting and equipment-change faster, easier and safer, MacArtney (Denmark) has designed and developed a new A-frame system. This new system makes it possible to access the top of the A-frame from the deck of the ship. This clever hydraulic design, using just 2 rams, articulates the A-frame a full 149°, from the 20° angle for launching equipment over the side or the rear of the vessel to 11° over the deck of the vessel. It has a safe working load of 89 kN throughout the entire process.|
Equipment, for example a full ROV launch system, can be installed on the A-frame on deck by operators working at deck level and readied for launch. With all operators clear of the frame, the A-frame can be lifted up, past 90° and then onwards over the side or the rear of the vessel and lowered down to 20° for launch into the water. For retrieval, the process is reversed and the A-frame raised past the 90° point and lowered to 11° over the vessel deck, which makes a 149 degree range of movement. From here, operators can conveniently remove and replace equipment and make any necessary adjustments to the A-frame without having to be hoisted up the frame. Lowering the A-frame to 11° from the deck also makes any service and maintenance work easier and faster to perform.
Traditionally, A-frames installed along the side or at the rear of vessels are used for launching a wide range of equipment and often for several tasks during a voyage. Dismounting equipment, adjusting the A-frame for a new task and mounting new equipment can be a time consuming and often complex task. Equipment can be large and heavy and the A-frame often needs adjusting for different equipment, requiring a technician being raised up to the top bar of the A-frame. Operators often have to be hoisted up in a chair or a harness up to 3 to 4 metres to reach the top, making adjustments time-consuming - and because of the potential hazards in working at height on a moving vessel, such work involves a number of safety precaution procedures.
MacArtney's Articulating A-frame is designed with a safe working load of 89 kN and safety factor (Psi) of 2.5. Luffing is at 48.5 kN with docking head and 89 kN without docking head. It has a luffing range of 11 degrees inboard to 20 degrees outboard.
comments powered by Disqus
Read more about:
vessel Safety ROV
Supplier: MacArtney Group
More news from this supplier:
MacArtney Tech for d’ROP Survey System
Range of Hydrostatic Pressure Vessels
MacArtney and EMS Formalise Business Partnership
NEXUS MK VII multiplexer Launch at Ocean Business
Geomarine to Represent MacArtney
Winch and CTD Packages for Turkish Research Vessels
Okeanus to Represent MacArtney in Offshore Brazil
Connectivity Helps Land UFO in North Sea
MacArtney and Alakaluf Set Sail for Chilean Underwater Venture
Lou Dennis to Lead MacArtney's 5th US Location
R/V Aranda Turns into Next Generation Marine Research
World ECDIS Day
HELCOM Contributes to Report on Oceans and the Law of the Sea
Oceans of Colour
SA Instrumentation’s New Premises Include Specialist Test Facilities
Collaborative Seismic Acquisition Programme offshore Mexico
WHOI Names Mark Abbott as President and Director
Chilean Port Facilitates Oceanographic Data Reporting
ECDIS Kernel v5.20 Improving ECDIS Usability
XIXth International Hydrographic Conference Dates Proposed
How to Use QPS' Qimera to Validate Processed Point Files
QPS Qimera processing software has been released earlier this year. To demonstrate the capabilities, this video shows how to load processed point files into a Qimera Project. It explains what processed point files are; how to specify the coordinate system of the project and the source files; how to create a Dynamic Surface from processed point files and how to change the dynamic surface and adjust the colour map to aid data editing and validation.