Marine Installation Manual 2022-03 3-10
3 Engine Installation
3.5 Engine foundation and seating
X62DF-S2.0
3.5 Engine foundation and seating
3.5.1 Engine load and force transmission
The engine seating foundation is a structural part of the ship integrated into the
double-bottom structure. It must be designed to absorb static and dynamic
forces, vibrations and torques from the engine, shaft and the propeller.
Figure 3-4 Force transmission to the engine foundation
The propulsion thrust is transmitted along the propulsion chain to the engine
structure through the thrust bearing. Thrust sleeves are required to absorb the
thrust force. In addition, the dynamic behaviour of engine forces requires a stiff
engine seating foundation (see the standard bolting in Figure 3-6,  3-12).
3.5.2 Engine foundation layouts
Depending on the owner’s requirements and on the ship design, a standard or a
narrow engine foundation layout are possible for the engine seating foundation.
The main difference between the two engine foundation layouts is the width of
the lube oil drain tank underneath the engine (see Figure 3-5).
Figure 3-5 A comparison of the standard and narrow engine foundation layout
SM-0825
Longitudinal
sÆŸÄ«eners
Lube oil drain tank
Lube oil drain tank
Rib
Rib
Standard engine foundaÆŸon layout*
Narrow engine foundaÆŸon layout*
(*Design aƩributes with diīerences are marked with colour)
Side girder
Side girder
Double-wall
structure
Coīerdam
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