Calculating area of a Ballast Tank

How do I go about calculating area of a ballast tank on a vessel to determine the amount of paint required for coating? From which all plans available onboard can I get this information?

Thanks

Seems easy to figure out, the inside of a box has 6 sides. Length X width of each side of the box, add all six sides up, this should be a pretty good figure of how many square feet that needs to be covered. Depending upon the type of coating you plan on using and mil thickness and number of coats the manufacturer recommends for coverage, this should be your answer. The coating should state on the label the square footage it should cover, e.g. 300 sq ft, or 550 sq ft, etc.

[QUOTE=Scallywag;128456]Seems easy to figure out, the inside of a box has 6 sides. Length X width of each side of the box, add all six sides up, this should be a pretty good figure of how many square feet that needs to be covered. Depending upon the type of coating you plan on using and mil thickness and number of coats the manufacturer recommends for coverage, this should be your answer. The coating should state on the label the square footage it should cover, e.g. 300 sq ft, or 550 sq ft, etc.[/QUOTE]

Hi Scallywag,

I’m talking about an actual tank onboard a merchant vessel. These have more than 6 sides & there are transverse floors with lightening holes along the length of these tanks. So, wanted to know, if there is any plan which gives the details of the area of these ballast tanks, or any other way this can be calculated with plans available onboard a merchant vessel.

Do not forget the surface area of the internal structure. It can be considerable.

Get the coverage rates from paint makers website cut sheets.

Do not forget % for touch ups and stripe coats before application of final coat.

[QUOTE=+A465B;128652]Do not forget the surface area of the internal structure. It can be considerable.[/QUOTE]

True. A co-worker of mine was recently calculating the surface area of a ballast tank for painting. It turned out to be three times the area of the bulkheads.

[QUOTE=Tups;128655]True. A co-worker of mine was recently calculating the surface area of a ballast tank for painting. It turned out to be three times the area of the bulkheads.[/QUOTE]

Sounds like your co-worker only calculated for 2 sides of the inside of the box.

RE: ‘‘from which all plans available’’
??
your ships drawings will have a ‘directory’. you should be able to narrow it down to a 5 minute search. Otherwise, if you’re all ready in a tank get a buddy and a tape measure and do the math … is this a trick question?