Full-service contract where we provided the technical purchase specifications, bid evaluations, structural design review, mechanical design review, electrical design review, construction QA/QC review, unique voyage fastening and voyage bracing design, and acceptance testing of a continuous ship unloader.
CP&A was retained by Massachusetts Port Authority to design a 20' raise for two low profile shuttle boom cranes with an erection procedure that permitted the cranes to go back in service when needed by MPA's shipping lines, so the Port did not have to take the cranes out of service. CP&A designed modifications for existing cranes, and crane jacking scheme to accomplish crane modifications with zero out-of-service time.
CP&A was retained by Boeing to provide field investigation; review of drawings to determine actual weight and dynamic performance of lifted load; evaluate fundamental response frequency of hoist system; report on condition of hoist system and provide recommendations regarding bridge crane modifications.
Four super post-panamax cranes for Georgia Port Authority where we provided technical specification review, structural design review, independent 3rd party quality assurance inspection of structural, mechanical, and electrical works. The cranes were fabricated in China by Kone. We also provided the construction QA/QC review works for the four option sister-cranes.
CP&A was retained by Cargotec to design the crane structure for a 5m raise of two cranes at Northport Malaysia. CP&A also reviewed the jacking system and the dock.
Two cranes were destroyed when a microburst wind blew one crane into another crane. The gantry rail brakes did not prevent the crane from moving along the rails so the concern was if the brake sizing met the specification. CP&A confirmed the gantry brakes were properly sized to meet the purchase specifications.
The original dock construction had small 20 ton cleats for mooring the vessels, which pulled out of the dock when two 1,000 foot long, C10 vessels tied up to a single cleat. CP&A designed a retrofit of the dock to permit 70 ton bollards to be installed in the place of the cleats. The photo shows two C10 vessels tied to a single bollard.
The blue crane was almost completely fabricated when it was struck by the green crane that was being moved. The Contractor requested assistance restoring the original geometry and other miscellaneous repairs. A CP&A engineer was on a plane overseas later that day.
Dan Dalton (www.daldaltoninc.com) performed the flame straightening work on the laterals and sway struts on Desmond Gerald Bridge. CP&A provided engineering supervision during the repairs.
The existing trolley girder hangers were cracking on the machinery-on-trolley crane. The support beam deformation was causing large stresses in the hanger flanges. CP&A solved the problem by adding a shear key and removing the hanger flanges so the hangers could accomodate the support beam deformation with very little stress.
In order to accommodate increased production rates on the new 787 Dreamliner, Boeing needed to modify their current 767 production line to exit the rear of the assembly building. A new hangar door 240' wide by 85' tall with supporting structure was needed. CP&A led a team of designers and provided complete structural design and support services for the hangar door support structure as well as the 8 hangar door leaves.
CP&A provided the structural engineering direction and services for the installation of three large paint booths capable of preparing and painting the tail fin on the 787 airliner. CP&A organized a structural team consisting of two other engineering firms to meet the aggressive design and construction schedule. As structural lead, we directed the team's efforts in designing new booths and modifying the existing building structure to support the associated exhaust fans, ductwork and new substation.
CP&A designed compete 350-ft long, 80 ton under-hung tri-bridge overhead crane system plus a new 40 ton, 4-hoist/rotate carrier trolley to facilitate production increase of the 777 line in the 40-25 building. Services included providing complete shop-level detail production drawings for all mechanical, structural and electrical components and assembly, as well as review of fabrication, assembly and installation.
The 2001 Nisqually Earthquake in Western Washington State caused significant structural damage to the Boeing Company's auditorium and cafeteria building located adjacent to Boeing Field in Seattle. The 3-story steel frame building was designed to the 1988 UBC and was constructed in 1991.
Our analysis showed that many of the foundation to column base connections were in tension due to the drag-down effect of the liquefied soil on the auger-cast piles. The resulting displacement pattern was significant enough to yield and buckle some of the chevron bracing elements, which severely impaired the building's lateral resistance.
CP&A developed a repair scheme to protect the building from the effects of a future seismic event. We detailed the installation of friction dampers in series with the existing chevron bracing. The damper slip distance accommodated the simultaneous effects of both seismic lateral displacements and differential vertical drag-down displacements. This scheme proved to be the most cost-effective and quickest method for repair.