Abstract
The II-type docks which consist of one or few pontoons and two towers and have the lifting from 300…400 tones to few tens of thousands are used for the repair of underwater hull and rudder-propeller complex, and as transporting structures, launching and transfer means during shipbuilding and ship repair on horizontal birth places. The composite floating docks which consist of composite pontoon and steel towers are the most popular on the global market. The pontoon hull is produced from steel-concrete as the one who satisfies the durability requirements most of all. The new materials for the floating steel-concrete docks based on the modified concrete which provide their durability and increase duration of exploitation in sea water have been developed. The structural line of composite floating docks with lifting forces from 8500 to 50000 tones from unified modular structures has been developed. The dock with the minimum length on which all functional rooms and mechanisms are located rationally has been determined. The dimensions (length and width) of the main dock can be enlarged for the building of floating docks with larger lifting force with the help of the additional pontoon-console which are jointed afloat and additional tower parts. The pontoon parts junction is made without the submerged-technical works.
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