designing the catamaran bridgedeck

hi everybody

i am working on design and analaysing bridgedeck of an aluminium catamaran. i want to design the stucture of it and then analays it with ansys over slamming force that driven from rulls of classification societies such as DNV and ABS.
in the first step i want to know the types of bridgedeck that choosen in designing catamarans, and i have a question, in bottom structure we have single bottom or double bottom , is these types of structure uses in designing bridge deck ?
if yes , i want a source that i can find the parameters of the bridge deck structure to designing it and take this step forward .
or if no , help on it .

im very glad that you brothers and sisters help me in my project