[ramminjammin]

My mast is stepped on the deck, and there is a pole, about 4 by 3 inch, that goes from the cabin floor to the top of the cabin under where the mast is stepped. This pole is directly in the middle of where i want to put a removable bunk and also in the middle of the seating area and is a bit of a nuisance..

How can i find out the correct way to "jackpost" this load ?
I dont want to add any weight if possible.

The layout works well for the two new posts that will carry the load to the floor, to put one post up by the forward bulkhead and the other post back by the transition from gally to main cabin, a span of about 6 ft 6 inches. I would like to use an aluminmum beam or rectangular tube; across the cabin celing to take the mast load to the two jack posts ;as it would save weight.

There is no keel as this is a trimaran and in the bilge the supporting framework looks similar to where the load is now to where the two new places for the load will move.

Thanks for any help .