Cutouts

The cutouts.dat file defines how NAPA Steel parametric shape identifiers for cutouts are converted to CADMATIC Hull cutouts. Lugs for the cutouts can be included if so desired.

These settings can be made in System Management > Import/Export > NAPA Steel > Connection Settings > Cutout Conversion.

Syntax for file content:

NAPA identifier	CADMATIC Hull profile type	profile height range	profile flange range	CADMATIC Hull cutout type number	L-var	value¹	R-var	value¹
¹ Numerical expressions in NAPA Steel connection settings can be used.

Description:

A mapping definition is needed for each imported NAPA Steel shape identifier for cutouts to CADMATIC Hull cutout. Mapping for each cutout is defined on its own line, followed by the CADMATIC Hull profile type the cutout is placed around. Next follows the profile height range and the profile flange range. The ranges are expressed as <minimum value>-<maximum value>. If a certain cutout matches the NAPA Steel parametric shape and the profile it is placed around matches the profile type and its height and flange are within the ranges, the cutout is converted according to that line.

For T-stiffeners converted to a plate with girder, the CADMATIC Hull profile type is set to TW. The cutout for this type has to be a girder cutout. For girder cutouts, the R5 to R8 variables are automatically calculated by the conversion program.

Next follows the CADMATIC Hull cutout type number, (optionally) followed by the R-variables and their values. See Numerical expressions in NAPA Steel connection settings.

Lugs can be included with L variables (optional). Additional R variables R9...RG can be used for lug dimensions.

Example:

A NAPA Steel cutout COA*140*7 placed around a HP104X7.

This will match the following line:

COA HP 119-176.99 * 106 L1 701 R1 30 R2 0 R3 60 R4 35-30 R9 20 RD 85

In CADMATIC Hull this will create a cutout of type 106 with R1 = 30, R2 = 0, R3 = 60 and R4 = 5. Lug type 701 is applied on the cutout with R9 = 20 and RD = 85.

Defining Non-Default Positions for the Height and Flange Parameters

It is possible that for certain profiles the height and flange dimension parameters are located in non-default positions in the mapping. For example the cutout properties of NAPA angle bars differ from those of HP profiles and flat bars so a non-default mapping is needed.

Non-default mapping can be done by using the Hidx and Fidx parameters (profile height index and profile flange index, respectively) which correspond to the dimension parameters in the NAPA cutout profile (cutout ID). The syntax is as follows:

<NapaID> <HullProfName> Hidx <profile_height_index> Fidx <profile_flange_index>

The default mappings, which the system uses if Hidx and Fidx are not defined explicitly, are as follows:

• If the NAPA cutout has only 2 dimension parameters in its cutout profile, for example COA*100*8¹, then

  • Hidx = 1 (corresponding to 100 here)

  • Fidx = 2 (corresponding to 8 here)

• If the NAPA cutout has 4 dimension parameters in its cutout profile, for example DFLT*0*9*0*90¹, then

  • Hidx = 4 (corresponding to 90 here)

  • Fidx = 2 (corresponding to 9 here)

  ¹ The * character is a delimiter separating the parameters.

These parameters are defined on a separate line for a specific NAPA profile type and Hull profile type combination (<napa shape identifier> <hull bracket main type>). For example, a mapping line COA HO Hidx 1 Fidx 3 means that the 1st parameter in the cutout profile is used for the height, and the 3rd one is used for the flange for mapping the cutouts of all COA HO profiles. The line can be placed anywhere in the mapping file.

Note: You must use either both parameters or neither (using either Hidx or Fidx alone is not allowed).

Below is a valid example for mapping the NAPA COA profile to Hull HO profile.

COA HO Hidx 1 Fidx 3
COA HO 80-99.99 * 105 R1 %1 R2 10
COA HO 100-119.99 * 105 R1 %1 R2 15
COA HO 120-150 * 105 R1 %1 R2 20