McLean Contracting Company needed a high-reach floating crane to install offshore power line supports in Baltimore. The highest lift was 400 feet above water. Liftech evaluated the feasibility of retrofitting their 400T Baltimore floating crane with a long jib to perform the lifts. Liftech developed the design criteria, assisted with developing a conceptual jib erection scheme, reviewed crane system strength…
Tag: Heavy Lift & Rigging
Port of Oakland Crane X437 Demolition Plan
Liftech provided engineering to demolish the articulated boom Crane X437 at Port of Oakland Berth 37, including review of the associated wharf loads Power Engineering Construction Co. used their DB Pacific floating crane, a Liebherr LR1300 crawler crane, and a hydraulic mobile crane. The crawler and mobile cranes imposed large, localized loads on the wharf structure. Liftech’s scope included wharf review…
8,000 t Floating Crane Design Review
ZPMC supplied an 8,000 t double boom shear leg floating crane to Samsung Heavy Industries Company Limited. The crane has 8 main hooks, each with a 1,000 t capacity. The crane is rated for 8,000 t at 82 m from boom heel. Liftech assisted ZPMC with developing the overall concept and layout, and designing various crane structural components.
1,700 t Floating Crane Design Review “Left Coast Lifter”
Liftech provided design assistance and review services to American Bridge/Fluor Enterprises (ABF) for procurement of a shear leg derrick. The derrick is used to erect the major components of the San Francisco-Oakland Bay Bridge self-anchored suspension span. The crane with a 100-m boom has 1,700 t capacity at 60 degrees. The crane has two auxiliary hooks with capacities of 100 t and 10 t. The boom is configured to lay down for transport within the USA river system.
AmClyde Floating Cranes
AmClyde supplied two semi-submersible vessels with twin revolving derricks of 6,000 t and 7,000 t capacity each. Liftech was part of the AmHoist design team and assisted in designing the crane booms. Reference: AmHoist St. Paul, Minnesota, USA
Staples Center Roof Erection
Staples Center, completed in 1999, is the home of the LA Lakers, Clippers, and Kings. Bickerton Iron Works was the rigging contractor selected to assemble, erect, and rig the roof structure. Liftech was retained by Bickerton as the structural engineer.
Jacking Frame for Raising Container Cranes
The existing jacking equipment for raising container cranes required a long time to set up and disassemble. Some equipment imposed unacceptable loads on the dock. Liftech designed a jacking frame that enables BIW to raise cranes in less than a week. The frame is capable of raising cranes 30 feet, can withstand up to 75 mph winds with the crane raised, and is supported on crane sill beams.
Giant Specialty Derrick Cranes
With a lifting capacity of 660 tons, the Columbia Giant meets the safety requirements for the Atomic Energy Commission heavy lifting projects. The derrick sits on a steel grillage on an existing dock so it can be slid out of the way when not in use. The pipe compression struts are above grade and can be disassembled. The boom and poles can be removed or reused for other derrick or gin pole applications.
4,000 t Floating Crane Design Review, Guangdong Salvage Bureau, China
Liftech provided structural design assistance and review services to ZPMC and assisted them in developing the overall concept and layout arrangement. Liftech also provided preliminary design of the boom tip and typical details of the boom structure, checked member sizes, reviewed design drawings of typical details, and provided suggestions for improvement.
Round Mountain Tunnel Relocation, Nevada
Global Rigging & Transport, LLC (GRT) was retained to relocate four concrete tunnel sections within the Round Mountain gold mine facility in Nevada. Each tunnel section, weighing up to 1,100 tons, was lifted using a special purpose transporter, moved along approximately 1.5 kilometers of the terrain with slopes of up to 5%, and set at the new location.