1. 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.

2. 2
Ing. Mariano Garijo Ortega www.theriggingpoint.com
Some drawings manufacturing project.

3. 3
Ing. Mariano Garijo Ortega www.theriggingpoint.com

4. 4
Ing. Mariano Garijo Ortega www.theriggingpoint.com
After the new engines were installed

5. 5
Ing. Mariano Garijo Ortega www.theriggingpoint.com
The main difficultywasthe limitedspace whichshould be occupied for the steelwork. The structure would had to
be designedasa made-to-measuresuitwithboltedsteelstructure aswell asitsdesignwouldhave tobe thoughtto
be erectedbyhand byworkers,because itwouldhave tobe carriedby workersinside of vessel withoutthe use of a
crane. Hence, the maximum weight of each section would have to be 100kg as limitation.
One difficultyadded in the calculation of the structure was the decentering which I had between the motors and
exitdoor,since itmade complicatedthe designwithLiveLoads(thisissue waswhereIspentmuch time looking for
a solution,sizingseveral designmodelsuptoachieve finallythe objective),because Iwouldhave to calculate a live
loadof 2 Tonesin a structure withoutslenderness exerting an important effort of Torsion to the whole structure.
Thissolutionwasthe mostreliable,safe andeasytomanufacture usingthe designof acurvedbeam,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
keeplookingforasolutionwhichcouldbearthese actions.Compliancewiththeserequirements,itwouldletto the
engines to go through of Exit door, due to the height limit.