Titanic's cargo capacity

Hi everybody. Can anyone tell me what Titanic's cargo capacity was, in tons? I've looked in my books and through ET's archives for the answer but can't seem to find it anywhere. Thanks!
Titanic's designed deadweight was 13,550 tons. That's the total weight of everything she carried, right down to the cat.
There was always at least 6,000 tons of coal, plus water, stores, etc. I'd guess at no more than 5,000 tons of cargo, even if it was crammed in.