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Jkt_node
There are two macros which can be used to generate an 8 pile jacket. The first generates the nodes needed for model based on the input parameters. The syntax of this macro is as follows: 

 
     JKT_NODE ELEV -BATTER BATTER \
                   -WPOINT WPOINT \
                   -YDIM   YDIM   \
                   -XDIM   OXDIM IXDIM
Here elev is a token list of the elevations beginning with the elevation above mean water level, ending with the elevation at the seafloor, and a space separating each elevation. The option -BATTER defines the batter measured in radians. The option -WPOINT defines the vertical distance between the top of the jacket and mean water level. The spacing between the main piles is defined by the options -YDIM, -OXDIM, and -IXDIM. The option -YDIM is the traverse spacing, the option -OXDIM is the longitudinal spacing of the outer legs, and the option -IXDIM is the longitudinal spacing of the inner legs. YDIM, OXDIM, and IXDIM are measured at the top elevation.

Naming convention of nodes consists of four digits followed by an alphabetic character. The elevations are named alphabetically with A starting at the top elevation. The first two numbers indicate the longitudinal location, measured from -(oxdim+ixdim)/2. The second two numbers indicate the transverse location, measured from -ydim/2.

JKT_ELEM:

The second macro generates the elements based on the nodes defined by jkt_node. They syntax of the command is: 

     jkt_elem elev -pildim pildim \
                  -horiz  horiz
Here elev is a token list of the elevations beginning with the elevation above mean water level, ending with the elevation at the seafloor, and a space separating each elevation. The option -pildim is the diameter of the piles, if the option is not used a default of 48 in will be used. The option -horiz defines the the type of bracing at each elevation. Here one specifies three tokens. The horizontal bracing token options are U, for no bracing, D, for diamond bracing, and X, for X-bracing. If the same bracing is desired for the three spacings only one token is needed. If the same bracing is desired for the first and third opening two tokens are necessary and the first token will indicated the first and third bracing. The default is no bracing.