Paravane Superstructure backing plates
The backing plates in the pilothouse are the same size as the exterior pads and are aluminum 3/8" plating.
For the stern feet of the superstructure they are much larger, since these feet take the majority of the load.
All the bolts are tapped through the fiberglass, which has a minimum thickness of 1/2 inch then backed with the aluminum plates and bolts.
The back plate bolts are 1" bolts on the exterior and 1/2" bolts on the interior side. The forward feet in the pilothouse are all 1/2" bolts.
The back feet are positioned directly over the salon wall where it intersects with a 2nd wall. 1/2 the bolts are on the outside of the house, and 1/2 the bolts go to the inside of the salon. The inside bolts are hidden.
Here is a picture of the rear feet exterior backing / chain plate.
I hope this helps. It's not a very good picture with the sun this morning, plus it came out sideways! I think it's shown in better detail in the video.
Jim
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