VPA needed cranes for their Portsmouth Marine Terminal facilities. They purchased three new ZPMC cranes, knowing the PMT wharf had wheel load and other limitations. On the crane side, VPA retained Liftech to work with ZPMC to assist in designing a light-weight truss boom crane for reduced waterside wheel loads. On the wharf side, Liftech reviewed the wharf girders and designed new stowage hardware.
International-Matex Tank Terminals (IMTT) replaced portions of an existing wood wharf structure at their Richmond, California, facility to meet Marine Oil Terminal Engineering and Maintenance Standards (MOTEMS). Liftech worked with Manson Construction Company to develop the replacement design.
Liftech worked with Manson Construction Company as part of their design-build team to design a 426-foot-long wharf, two access bridges, a 955-foot-long sheet pile seawall, mooring platforms, walkways, and a longshoreman building. The moment frame and thin deck of the wharf structure limit the seismic forces and number of piles required.
A Halifax Port Authority tenant purchased new ship-to-shore container cranes. The wharf was extended several times between 1969 and 2010. The new crane wheel loads exceeded the allowable wheel loads on the existing girders. The port authority was faced with the possibility of reinforcing the majority of the girders. Liftech analyzed the girders and estimated the girder capacity for shear, flexure, concrete bearing, and pile bearing.
Global Rigging & Transport unloaded two Doosan cranes at the Port of New Orleans using a dolly system. Liftech reviewed the wharf structure to determine its adequacy to support the dolly loads and helped select the offload location. Reference: Global Rigging & Transport, LLC Virginia Beach, Virginia, USA
During a storm, a 100’ by 400’ barge broke its mooring and collided with the pier at McNears Beach Park, damaging about half of the pier structure. The original pier structure consisted of a precast concrete superstructure supported by slightly battered 18” octagonal precast, prestressed piles. Liftech designed a replacement pier structure with details to provide significantly better seismic performance.
The Port of Richmond wanted to know if their 60-plus year old wharf at Pt. Potrero Terminal could service break-bulk cargoes and support 40,000 lb double axle wheel loads. At Berth 7, the wharf surface and some of the wood piles had deteriorated from lack of maintenance. Conventional analysis could not justify supporting the desired wheel loads.
The Port of Oakland retained Liftech and Geomatrix to determine the crane girder capacity at all wharves at the port. Based on Geomatrix’s analysis, the piles at Berths 24 and 25 did not have adequate capacity for the current cranes. Liftech designed a load test that confirmed the piles were strong enough to carry the crane loads. An analysis of the test data was used to increase the calculated capacity at other wharves at the port.
Liftech worked with Manson Construction as part of their design-build team to design the wharf, access bridge, and mooring platform structures for a cement unloading facility for Cemex Inc. The 550-foot wharf supports a cement unloader and screw conveyor system to transfer cement from the vessel to storage structures on land. The moment frame design for the wharf structure limits…
The rated capacity of existing wharf structures was increased up to 35% after Liftech evaluated the strength of the structures at Portsmouth Marine Terminal. Increasing the rated load eliminated the need to strengthen the wharves or limit the operations of the larger, newly purchased cranes. Liftech’s assessment included state-of-the-art methods such as strut and tie.