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ÇYTHYE 2018 steel beam — cross-section bending
Cross-section bending resistance for compact/non-compact sections (IPE, HEA, HEB) per ÇYTHYE 2018 §8.2: section class, φb·Mn.
Cross-section resistance only — LTB (lateral-torsional buckling) is NOT computed. This is the upper-bound capacity; if the member is not fully laterally restrained, the actual capacity may be lower. Verify lateral restraint or compute LTB separately.
Inputs
Results
ε = √(235/Fy)—
Flange c/tf → class—
Web c/tw → class—
Section class—
Mn [kN·m]—
φb·Mn [kN·m]—
Citations
§5.5ε=√(235/Fy); flange c=b/2−tw/2−r; web c=h−2tf−2r. Class per EN 1993-1-1 / ÇYTHYE Table 5.2.
§8.2φb=0.90; class 1,2: Mp=Wpl,y·Fy; class 3: Mel=Wel,y·Fy.
DB52 sections: IPE Wpl from published EN 10365 tables (eurocodeapplied.com, cross-verified via Wely=Iy/ymax). HEA/HEB Wpl from first-principles without fillets (~3-5% conservative).
VERIFYIPE300/S235→class 1, φMn=132.9 kNm. HEA300/S355→classF=3 (c/tf=8.48>9ε=7.32), elastic capacity.
Preliminary calculation tool. Results are for preliminary sizing and cross-check only. Final design, sealed responsibility, and permit submissions require the full official text of the referenced regulations and the review of a licensed engineer.