Challenge: The Berth 164 structural system was previously evaluated by POLA and their consultants as a "high risk" facility and was found to be inadequate considering MOTEMS requirements for berthing loads and Level 2 seismic loads. The purpose of this analysis is to...

challenge: A structural steel work platform is required for workers to better access the mooring lines and more easily guide them to the capstan when mooring ships. The platform must meet geometric challenges to accommodate the existing equipment, piping, and adjacent...

Challenge: The steel piles that are driven into the sea floor for the purpose of berthing and mooring ships at a shipbuilding facility in San Diego, have reached the end of their service life. HEA was tasked with helping the client create a pile replacement plan as...

Challenge: Our firm was tasked to design a 360 degree swivel adapter for use with an existing spreader beam that our firm designed many years ago. The required suspended load was significant: 180 tons. The adapter also had to be capable of swiveling 360 degrees and...

An AOE-10 rejection notice was written on shipboard bleed air and auxiliary steam piping systems because pipe supports did not comply with established Navy shock mounting requirements. HEA performed detailed dynamic shock analyses (DDAM) for both piping systems. These...

The admissible air draft for a ship passing beneath the bridges of the Carquinez Strait was not known. HEA established minimum air draft requirements for passing in and out of the Carquinez Strait during any one week. This information enabled the shipbuilder to add...

It was thought that waves generated by launching large vessels damaged a pier. HEA performed a detailed failure evaluation of the pier and demonstrated the damage was not attributable to launches. The damage was found to be caused by dry dock mooring loads during...

It was desired to extend the length of a carriage way to accommodate hauling larger barges. HEA designed an extension of the existing rail system, which integrated fully with the existing rail. HEA also designed an upgraded winch and pulley system to accommodate the...

Adjustable connections for several bolt sizes are required for mounting shipboard equipment in a vibratory environment. HEA designed adjustment plugs that allow for connection of bolt holes with poor alignment and provide slip resistant vibration mounting integrity....

Deck plate thickness wastage was observed in a shipyard floating dry dock. HEA evaluated the admissible floater deck plate wastage. Stress and buckling limits were established. The existing deck plate thickness wastage was deemed acceptable.