EN 1993-1-1 Steel Section · Section of HEM
HEM 340 — Section Properties & EN 1993-1-1 Classification
HEM 340 is a Class 1 — Plastic
section in S355 (fy = 355 MPa).
h = 377 mm
b = 308 mm
A = 16,720 mm²
Iy = 76,370 cm⁴
Wpl,y = 4868 cm³
EN / NL / DE annexes
No sign-up · Free forever
Cross-Section Classification (EN 1993-1-1 Table 5.2)
Steel Grade
γM0
Web (c/tw )
Flange (c/tf )
Class
S235
1.00
12.33 → 1
3.64 → 1
Class 1
S235
1.10
12.33 → 1
3.64 → 1
Class 1
S235
1.05
12.33 → 1
3.64 → 1
Class 1
S275
1.00
12.33 → 1
3.64 → 1
Class 1
S275
1.10
12.33 → 1
3.64 → 1
Class 1
S275
1.05
12.33 → 1
3.64 → 1
Class 1
S355
1.00
12.33 → 1
3.64 → 1
Class 1
S355
1.10
12.33 → 1
3.64 → 1
Class 1
S355
1.05
12.33 → 1
3.64 → 1
Class 1
S420
1.00
12.33 → 1
3.64 → 1
Class 1
S420
1.10
12.33 → 1
3.64 → 1
Class 1
S420
1.05
12.33 → 1
3.64 → 1
Class 1
S460
1.00
12.33 → 1
3.64 → 1
Class 1
S460
1.10
12.33 → 1
3.64 → 1
Class 1
S460
1.05
12.33 → 1
3.64 → 1
Class 1
Property Value
h (mm) 377 b (mm) 308 tw / tf (mm) 21 / 32 r (mm) 27 A (mm²) 16,720 Iy (cm⁴) 76,370 Iz (cm⁴) 20,340 Wel,y (cm³) 4052 Wpl,y (cm³) 4868 iy / iz (mm) 213.7 / 110.3
Design Resistances · γM0
Resistance Value
Npl,Rd 3,929.2 kN Vpl,Rd 1,134.3 kN Mpl,Rd 1,144 kNm Mel,Rd 952.2 kNm
Resistance Value
Npl,Rd 3,572 kN Vpl,Rd 1,031.1 kN Mpl,Rd 1,040 kNm Mel,Rd 865.7 kNm
Resistance Value
Npl,Rd 3,742.1 kN Vpl,Rd 1,080.2 kN Mpl,Rd 1,089.5 kNm Mel,Rd 906.9 kNm
Resistance Value
Npl,Rd 4,598 kN Vpl,Rd 1,327.3 kN Mpl,Rd 1,338.7 kNm Mel,Rd 1,114.3 kNm
Resistance Value
Npl,Rd 4,180 kN Vpl,Rd 1,206.7 kN Mpl,Rd 1,217 kNm Mel,Rd 1,013 kNm
Resistance Value
Npl,Rd 4,379 kN Vpl,Rd 1,264.1 kN Mpl,Rd 1,275 kNm Mel,Rd 1,061.2 kNm
Resistance Value
Npl,Rd 5,935.6 kN Vpl,Rd 1,713.5 kN Mpl,Rd 1,728.1 kNm Mel,Rd 1,438.5 kNm
Resistance Value
Npl,Rd 5,396 kN Vpl,Rd 1,557.7 kN Mpl,Rd 1,571 kNm Mel,Rd 1,307.7 kNm
Resistance Value
Npl,Rd 5,653 kN Vpl,Rd 1,631.9 kN Mpl,Rd 1,645.8 kNm Mel,Rd 1,370 kNm
Resistance Value
Npl,Rd 7,022.4 kN Vpl,Rd 2,027.2 kN Mpl,Rd 2,044.6 kNm Mel,Rd 1,701.8 kNm
Resistance Value
Npl,Rd 6,384 kN Vpl,Rd 1,842.9 kN Mpl,Rd 1,858.7 kNm Mel,Rd 1,547.1 kNm
Resistance Value
Npl,Rd 6,688 kN Vpl,Rd 1,930.7 kN Mpl,Rd 1,947.2 kNm Mel,Rd 1,620.8 kNm
Resistance Value
Npl,Rd 7,691.2 kN Vpl,Rd 2,220.3 kN Mpl,Rd 2,239.3 kNm Mel,Rd 1,863.9 kNm
Resistance Value
Npl,Rd 6,992 kN Vpl,Rd 2,018.4 kN Mpl,Rd 2,035.7 kNm Mel,Rd 1,694.5 kNm
Resistance Value
Npl,Rd 7,325 kN Vpl,Rd 2,114.5 kN Mpl,Rd 2,132.6 kNm Mel,Rd 1,775.2 kNm
Pro feature
Running a full portal frame with 50+ members?
FrameAI Pro processes your entire PDF drawing set — extracts all members, classifies every section, runs member buckling, connection design, and outputs a fabrication-ready drawing with DSTV NC1 files.
See Pro plans →
← ← Back to calculator
HEM 340 — Cross-Section Classification & Resistances
This page shows pre-computed EN 1993-1-1 design values for the HEM 340 HEM section. The governing cross-section class is 1 (Class 1 — Plastic), which determines whether the section may develop its full plastic moment capacity (Class 1–2) or is limited to the elastic moment (Class 3–4). Npl,Rd, Vpl,Rd, Mpl,Rd, and Mel,Rd are shown for all combinations of steel grade (S235 to S460) and national annex (EN γM0=1.00, NL γM0=1.10, DE γM0=1.05).