how much aluminium sheets would a - 86x12 meter and 4 meter draft - ship need ?

[Keganhirl]

Hello,

I am trying to figure how much aluminium sheets would a - 86x12 meter and 4 meter draft - ship need ? It would be a monohull as well.

Thank you,

[hmwadeseo]

Can you clarify what the price means? Also, a square meter of any material only covers a square meter.

[Keganhirl]

The price signifies that on a 5 year period aluminium 5000 (noted : A5000) is noted to cost $2,311 per tonne. However, I have calculated that it would cost, in theory, $85,507 . So, for that price you can cover a rectangle (dimensions : 84x12x4) of aluminium 5082.

This is how I've come to that conclusion :

calculating the surface area of each side, so
84x12 = 1,032m² for one side -> 2 sides = 2,064m²
12x4 = 48m² -> 2 sides = 96m²
86x4 = 344m² -> 2 sides = 688m²

Total surface area = 2,848 m², and again this is based on a rectangle so it stands as a theoretical value.
Then, I've noted that one single sheet of A5000 is equal to : 5,56m².
Therefore -> 2,848 / 5,56

So, in theory I would need approximately : 512,23 sheets of A5000. To add , one sheet (size 60"x144") = 71,39kg.
Thus making the total weight : 512,23 x 71,39 = 36,568 kg or approximately 37 tonnes.

Finally, as I mentioned earlier the price per tonne is -> 1t = $2,311. So, we can calculate : 37 tonnes x $2,311 = $85,507
So the theoretical price will be : $85,507.

[askaluadmin]

Even on a plain boat, the cost of the aluminum plating will be less than 5% of the total cost. Framing and welding supplies will be more. Aluminum can be recycled, but what you will sell the scrap for is not much. Trading vessels are heavy. They need to be for the abuse they get when working. Unless you have at least a preliminary design (not simply a drawing) , the calculations make no sense. The shape of the hull, the framing type, what class or other regulations to comply with, area of operation, etc. will determine and drive the design and cost.