adding a 40 gal tank for gasoline

I have a 25 feet boat, and I find that it construction is based on ribs each at about 36 inches .

I purchased a TODD plastic fuel tank * v bottom belly type that is 52 inches long, x 26 inch wide, and 10 inch hight, which I plan to install about in the middle toward the rear of boat

My question is :

Can I cut one rib to tank shape to fit it, as distance from existing ribs are 36 inches.
Each rib is wood solid that has about t 12 inch high at V center, and are about 1 inch thick.

Is there any dange about weekening the structure and put in dange the boat???

Can someone advise me for a proper methodology to solve this problem.

please email to: apinzon@vibran.com.co

 

It would be necessary to see the boat or the blueprints to answer you question. I assume that you have insuficient headroom to install the tank. Frames 36" on center and 12" deep sound odd. What is the material and dimensions of the hull?

 

I have made a posible design, inwhich I decide to add a new flow (in blue color, and placing the new tank (gray color) below driver seat and driving console as in picture
yellow is piping for control and hydraulic steering.

I will move an existing 15 galon tank (red), and place it yust below the wind shield plane, cutting floor to size of tank, in this way I don't harm any structural beam.


In this way I think, now I have a better stability of weight , as boat is today, is light, and in rough waters it jumps quite hard.

boat is in Fiberglass, local design.

I was initiaslly planning to place tank, yust in front of driving console under the floor, but I send you my new design, as I think placing it below the floor is risky, as a main rib must be cut, do you see any problem with my new design, as in drawing.
Dimensions are very close.

 

What drawing? Did you mean to post an attachment?

 

This is drawing pasted on a word page