STA CRANE BARGE SOFTWARE • Stewart Technology AssociatesStewart Technology Associates



STA CRANEBARGE SOFTWARE  For Safe Lift Planning in Afloat Operations

STA CRANEBARGE calculates the allowable loads for specific crane and barge operations.  View list of STA software.

The barge loaded condition is defined and stored.  This includes ballast water in the ballast tanks, the barge lightship weight, the Gottwald AK 912 crane (which is welded in place on the forward end of the deck) and additional deck cargo.

The barge hydrostatics characteristics are pre-defined and re-computed every time any data item is edited.  The program provides the immediate values for the vessel total displacement, draft (and freeboard) heel, and trim.  Large angle properties are also available showing various stability margins.

The Gottwald crane characteristics are pre-defined.  Crane limits are pre-calculated (within STA CRANEBARGE).  Load charts are available and data for planned lifts are re-plotted plotted on the charts every time any data item is edited.

The program may simply be used for assessing and storing barge hydrostatics and stability for any load case.  However, it is intended to do this while simultaneously investigating lift case scenarios where the crane limits are also determined.

In order to assist with deck load and ballast planning, the program allows the user to store 34 discrete items of deck cargo.  These items are specified on the Deck Cargo Sheet.  Two additional items may be specified on the Operations Planning Control Sheets.

Two lift scenarios are provided.  In each case the user is informed of the barge hydrostatic characteristics before a load is lifted, when it is lifted and when it is set down in a new location.  The conditions with the load on the hook just before set down and the conditions with the hook load released are reported.

In the first lift scenario, the crane is used to lift one of the cargo items from the Deck Cargo Sheet off the Carolina M and set it either onto another vessel, or onto the seabed or dock.  Thus the lift conditions starts with a known load already on board at a known position and finishes with the load no longer on board.

In the second lift scenario a more general load sequence is analyzed that generally involves lifting a load from a location not on the Carolina and setting it onto another location that is not on the Carolina.  However, results are also given for the final hydrostatic conditions of the barge for the condition of the lifted item being set on the deck of the Carolina when the hook load is released.


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