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.
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<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.
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A |
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<length_A>::= <number> |
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B |
For brackets in syntax 5, the length of the side B is normally controlled by |
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BOV |
the profile overlap. |
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The following possibilities exist:
B is then always given perpendicular to the plate. |
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Consequently, a bracket can be generated without giving any dimensions as far as the rules specified for the bracket are accepted. |
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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> |
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M1 |
For brackets with lug: |
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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. |
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For brackets without lug: |
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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.) |
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Examples:
A GA-bracket connecting a sideweb to a longitudinal.
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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.
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BRA, EC, COR=4, SID=AFT, MAT=15, M1=300, BOV=1.7, L570/S1; |


