I am designing a set of members using the equivalent member method in RF‑/STEEL EC3, but the calculation fails. The system is unstable, delivering the message "Non-designable - ER055) Zero value of the critical moment on the segment".
I am trying to design an open, unsymmetric aluminum cross-section in RF‑/ALUMINUM and I am get the warning "Non-designable - 1022) General cross-section — Check of stability is not available". What is the reason?
RF‑STEEL AISC add-module shows non-designable results for general cross-sections because of shear buckling checks according to Chapter G. How do I solve this?
I design an asymmetric cross-section and get the message: "Non-designable: ER051) Moment about z‑axis on asymmetric cross-section, taper or set of members." Why?
I am designing a tapered beam and I get the message "Non-designable: ER051 Moment about z-axis on asymmetric cross-section, taper, or set of members". Why?
After running the design in RF‑STEEL AISC, I receive error message 1002 - Invalid cross-section of type "Channel" according to F2. What does this error mean?
In RF‑CONCRETE Surfaces, I get non-designable situations with a note saying that the shear resistance cannot be checked (cross-section entirely cracked). What is the reason for this message?
I am designing a set of members with a uniform, double-symmetric cross-section and I get the warning "Non-designable: ER051 Moment about z-axis on asymmetric cross-section, taper, or set of members". Why?
I am designing a single-symmetric cross-section (T‑section) and get the message "Non-designable: ER056) The General Method is applicable only for I‑sections." Why?
In RF‑CONCRETE Surfaces, I get non-designable situations at some locations. Note 5 is displayed: "Allowable compressive stress of concrete in strut direction exceeded."
When calculating my model with a floor slab, I obtain very large shear forces displayed in the slab and very large, unrealistic support forces displayed on the support ends, which makes the slab non-designable. Why?