Attached are photos of a Fluor lift that Kent Goodman helped make in Yanbu, Saudi Arabia. I say helped because Kent reviewed and approved Van Seumeren’s development material and rigging drawings and was on site as the Supervising Rigging Engineer for all of the heavy lifts.Kent Goodman is retired now from active work, but still is active as rigging consultant.These Twin Ring cranes were designed and built by Huisman Equipment in Schiedam, The Netherlands
in close cooperation with van Seumeren. For more information contact The Heavy Lift Specialist.
1.People in the trade call the lift crane a platform twin ring crane. It does not have a twin ring but a twin boom in an A frame shape.
The twin boom does three important things:
1) there are two booms now lifting the load,
2) provides greater side stability,
3) the shape allows the boom foot carriers to be moved off center of the ring and moved around to the sides, thus distributing the load to the ring in a more effective way and allowing a much lower ground bearing pressure under the steel mats, ie, the GBP for this lift was about 34 Te/M^2.
2. Photo 1 above shows the vessel being upended utilizing an upending device mounted on SPMT’s. What is neat about the device is that at initial pick position (IPP), the part of the device mounted to the base ring pivots at the bottom of the base ring, thus carrying its share of the total load. At about 70 degrees, longer lugs mounted above the center of the vessel engage and the pivot point then became above the center line of the vessel, thus preventing the SPMT’s from carrying the full load of the vessel when it is vertical. Good engineering. You will have to study the photos to actually see what I am talking about.
3. Photo 6 above shows the lift crane jacked up and ready for the SPMT’s to be placed under it for moving to the next heavy lift. There really isn’t any comparison for moving say this crane as the SPMT’s are already on site therefore no extra move in expense, the cost of dis-assembling/assembling the crane would be in the neighborhood of $500,000, the area would be tied up at the old lift site and the new lift site for at least three weeks each which is costly for the units and causes a lot of non-production/interference time for their crews, and the list goes on.
4. Photo 10 below shows a number 6 axle lines of SPMT’s carrying the front of the crane, ie, the boom fully rigged and half of the ring.
5. Photo 11 shows two lines of SPMT’s carrying the back part of the ring and remaining counterweight. Note that only enough counterweight was left on the ring to balance the boom, hook, etc.
Three more photos of the lift and the details of the rigging hookup.
The first Twin Ring Crane was designed around an existing Demag CC4800 crane, back in 1996 by Huisman Equipment and is now located in Dubai, UAE. See some pictures and Videos below:The first van Seumeren Demag CC4800, was bought early 1992 in order to be used on the Pusri Fertilizer Plant in Palembang, Sumatra in co-operation with Jumbo Shipping.
A Total Transport contract was concluded by Jumbo Shipping, in which van Seumeren was responsible for the barging, inland haulage and erection of all major heavy lifts. Check it out on this video:In 1996, van Seumeren needed more lifting capacity and in a joint co-operation between Huisman and Van Seumeren the first twin Ring crane was designed and built.
The first Twin Ring CC4800 tested at the Van Seumeren yard in De Meern, The Netherlands in 1996
The Twin Ring CC4800 can be positioned in a central point of the plant under construction and can lift all major items in place
The CC4800 with 92 m main boom and super lift being used at the GPP-4 job site in Malaysia in 1995-1996 Check it out on this video : Lifting the Big ones at 54 min.
The Demag CC4800 used at the Kalundborg Project in Denmark to lift piperacks in position
From one central location the heavy lifts can be erected and placed on foundation
Richard L.Krabbendam, the Heavy Lift Specialist during the inauguration of the first CC4800 Twin Ring crane in 1996