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Hull and Outfitting

Syntax 5

  • Last UpdatedDec 08, 2025
  • 4 minute read

The images below illustrate the type of connections which the bracket may be part of. (In the images, L denotes shell profiles and S stiffeners. A, B, D are bracket parameters according to the standards, H is the profile height.)

Any of the involved panels can be the current one. If the panel statement with L/S is current, then the keyword MIRR should be given to reflect the bracket.

<syntax_5>::= [,A= <length_A>

                [,(BOV= <overlap>) | (B= <length_B>)]

                [,D= <length_D>]

                [,M1= <dist>]

                [, <ext_prof_ref> (1 ... 25) [,REF]]

                [/ <int_prof_ref> (1 ... 25)]

<ext_prof_ref> and <int_prof_ref>, see General Layout of a Statement. However, a bracket cannot overlap a flange.

In general, the bracket parameters will be generated according to the rules specified in the Design Standards. (The special built-in bracket BVB has a quite different way of deriving parameters compared to the others with a very high degree of automation.) Normally, quite a number of different alternatives exist and they will be described in detail below.

A

  1. For brackets with a D-side (see the images above) this measure is defined by an intersecting stiffener or flange

    If not given by the user, the system will automatically search for the closest intersecting profile.

  2. For brackets with a toe, the measure can be defined in the same way. However, the stiffener may be on the opposite side of the plate and there will be a clearance between the bracket and the intersected profile. See the image below:

  3. If not given at all, the A-measure will be calculated from the condition regarding clearance at the end of the overlapped profile (1.5*H for built-in brackets) and angle between the plate surface and the free edge (< 75 degrees for built-in brackets). See the Design Standards for further information. (For externally defined brackets constants of the bracket set-up are used.)

  4. Finally, for brackets with a toe, A can be given explicitly.

<length_A>::= <number>

B

For brackets in syntax 5, the length of the side B is normally controlled by

BOV

the profile overlap.

The following possibilities exist:

  1. If neither BOV nor B is given, Hull Modelling uses the overlap as specified by bracket set-up.

  2. BOV is given explicitly.

    <overlap>::= <number>

    BOV < 5 is interpreted as a factor giving the actual overlap BOV * H. BOV >= 5 is the actual overlap.

    The overlap is measured along the profile, taking into account the end cutting.

  3. Finally, for certain types of toe/overlap the B-measure can be given explicitly by the user.

    <length_B>::= <number>

    B is then always given perpendicular to the plate.

    Consequently, a bracket can be generated without giving any dimensions as far as the rules specified for the bracket are accepted.

    D

    The length of edge D is calculated automatically for those brackets where relevant.

    However, the D-measure can be given explicitly, but the given length must be shorter than the automatically calculated value.

    <length_D>::= <number>

    M1

    For brackets with lug:

    If not given, the lug will end 50 mm before the end of the profile (along the trace of it).

    M1 defines the distance of a seam from the plate.

    <dist>::= <number>

    M1 > 0 for perpendicular distance. The lug will end 50 mm before the point defined by M1.

    M1 < 0 indicates the distance along the trace of the overlapped profile from its end to the beginning of the lug of the bracket.

    For brackets without lug:

    The distance from the "origin" corner of the bracket and the trace of the overlapped profile. The distance is measured in the direction of the A-arm of the bracket (dimensions above for built-in brackets.)

    Examples:

    A GA-bracket connecting a sideweb to a longitudinal.

    BRA, GA, SID=FOR, BOV=2.7, A=1175, MAT=12.5, L450;

    (BOV = 945 gives the same result.)

    If the default rules are used:

    BRA, GA, SID=FOR, MAT=12.5, L450;

    An EC-bracket connecting a sideweb with an intersecting profile to a longitudinal.

    BRA, EC, COR=4, SID=AFT, MAT=15, M1=300, BOV=1.7, L570/S1;

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