Replace motors in Superyacht

1 Ing. Mariano Garijo Ortega www.theriggingpoint.com

Project to replace engines in Sailboat of 50 meters long

This project was carried out to replace five damaged engines in the Engine room of a Superyacht, which was located below of living room of the vessel.

The solution structural was the simulation an overhead girder with a cart, that moving across the joist channel. The metallic structure was supported in the bases of motor and outside was supported with the help of the mast.


Some drawings manufacturing project.


After the new engines were installed


The main difficulty was the limited space which should be occupied for the steelwork. The structure would had to be designed as a made-to-measure suit with bolted steel structure as well as its design would have to be thought to be erected by hand by workers, because it would have to be carried by workers inside of vessel without the use of a crane. Hence, the maximum weight of each section would have to be 100kg as limitation.

One difficulty added in the calculation of the structure was the decentering which I had between the motors and exit door, since it made complicated the design with Live Loads (this issue was where I spent much time looking for a solution, sizing several design models up to achieve finally the objective), because I would have to calculate a live load of 2 Tones in a structure without slenderness exerting an important effort of Torsion to the whole structure. This solution was the most reliable, safe and easy to manufacture using the design of a curved beam, even so, I still kept having limitations, and the depth section of the beam had to be up to 120mm as maximum. I would have to keep looking for a solution which could bear these actions. Compliance with these requirements, it would let to the engines to go through of Exit door, due to the height limit.

Replace motors in Superyacht

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