SOFiSTiK 2026-6.0.879, AQUA module.
I’m modeling a composite bridge deck cross-section: an irregular (non-rectangular) concrete slab defined via POLY, combined with a steel plate that I originally wanted to model as thin-walled (PLAT).
I understand from the manual that PLAT (thin-walled family) cannot be combined with POLY (solid family) in the same SECT — confirmed by testing, this fails regardless of how well the element coordinates line up.
My question: **what is the standard/recommended AQUA approach for a composite section where the concrete slab has irregular, non-constant-thickness geometry (best represented as POLY) and the steel part would ideally be thin-walled (PLAT)? or Both should created under POLY?
**
+PROG AQUA urs:1
HEAD Materials and Cross Sections
NORM DC DIN NDC EN199X-200X
UNIT TYPE 0
SECT 7
POLY TYPE O MNO 1 $ concrete slab
VERT Y Z R TYPE
0.0000 -3.5440 - O
-1.8180 -3.6040 - O
-2.4680 -3.5650 - O
-3.5680 -3.5650 - O
-6.5000 -3.8710 - O
-6.5000 -4.1210 - O
-3.4680 -4.0150 - O
-1.8180 -3.9570 - O
1.8070 -3.8310 - O
3.4570 -3.7950 - O
6.5000 -3.8560 - O
6.5000 -3.6060 - O
3.5570 -3.3450 - O
2.4570 -3.3450 - O
1.8070 -3.4810 - O
POLY TYPE O MNO 3 $ steel plate
VERT Y Z R TYPE
3.4570 -3.3450 - O
2.7220 0.0000 - O
-2.7330 0.0000 - O
-3.4680 -3.5650 - O
-3.4530 -3.5650 - O
-2.7190 -0.0300 - O
2.7140 -0.0300 - O
3.4420 -3.3450 - O
end
