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FAQ 005329 | I received an error message “Surface of incompatible type... (Surface in upper plane...
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I received an error message “Surface of incompatible type... (Surface in upper plane of building story must be of ‘Load transfer’ type)” when running the calculation. What is the reason?Answer
You have selected "Rigid diaphragm" as the story slab stiffness in the Building Stories (Image 02). The "Rigid Diaphragm" is used to rigidly connect all components of a story in the floor plane with a rigid link. By doing so, the floor can no longer be defined with its real stiffness.
Therefore, surfaces with the "Load Transfer" stiffness type must be used (Image 03). It is not possible to create internal rigid links for surfaces with the stiffness type "Standard".
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Dlubal FAQ Building model Load transfer Rigid diaphragm Error message Building story Incompatible Surface type Frequently Asked Question FAQ about Dlubal Software Question and Answer to Dlubal Software
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AISC 341-16 Moment Frame Member Design in RFEM 6
The three types of moment frames (Ordinary, Intermediate, Special) are available in the Steel Design add-on of RFEM 6. The seismic design result according to AISC 341-16 is categorized into two sections: member requirements and connection requirements.
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