Lifting Lug Calculator guide

The Lifting Lug Calculator verifies a single-plate lifting lug / padeye from geometry to weld: net-section tension, pin bearing, shear tear-out, pin shear, and an angle-aware fillet-weld group analysis, with a live dimensioned schematic and one governing result. Everything updates as you type, and the full state lives in the URL so a design can be shared as a link.

Methodology routes

Pick a methodology route and it becomes the primary utilisation basis; the other families are still computed and shown as cross-checks:

• Mechanics-of-materials — raw stresses from public-domain identities, judged against allowable stresses you supply. No code factors are applied for you.
• ASME BTH-1-2020 — design-category factors (Nd), effective width, single-plane fracture, double-plane shear-out, bearing, and the §3-3.4.3 fillet-weld allowable.
• EN 1993-1-8:2005 §3.13 — pin-connection geometry (Type A/B), pin shear, plate bearing, pin bending from the Figure 3.11 fork geometry, combined checks, and §4 fillet-weld methods with partial factors ${\gamma }_M$ you control.
• DNV-ST-N001 §16 — DAF from the Table 16-1 environment column, skew-load factor, and lift-point consequence factor applied on the demand side, with resistance from the mechanics checks.

Weld design

The weld module decomposes the (angle-adjusted) pin load into an axial component, a transverse shear, and an in-plane moment via the lever arm between pin centre and weld-group centroid — then checks throat stresses for parallel or all-around fillet topologies. The derived section properties and force decomposition are shown live under the weld inputs and in the report.

The report

The report contains the inputs summary, schematic, governing result, every check with demand / capacity / utilisation, the weld breakdown, warnings, assumptions, and the source registry behind each computed value. Preview it for free (watermarked); a Xarpis subscription unlocks clean print and PDF download for every calculator on the platform.

What it will not do

This is a preliminary design and verification tool — not a substitute for FEA or independent engineering review. Out-of-plane loading, fatigue design, and cheek-plate lugs are out of scope, and the calculator flags geometries and angles where FEA is recommended.