Structural Engineering & Statics
where the load goes
Generator

The weld-direction generator

Rendered here at the parameters it defaults to, with every essay that calls it — which is the same list as the blast radius of changing it.
A fillet weld is stronger across than alongCapacity of a 4 mm throat over 100 mm, against the angle between the weld's axis and the load. Loaded along its length it carries 116.83 kN; loaded across it, 143.09 kN. The ratio is 1.22, which is √3/√2 exactly, and it comes out of the failure criterion rather than out of a test.0102030405060708090020406080100120140160angle between the weld and the load, degreescapacity, kN0° · 116.83 kN45° · 127.98 kN90° · 143.09 kN×1.22along

2 essays call weld-direction. The drawing above is what it returns with no arguments at all; every call below passes it something, because a placement that passes nothing draws whichever member of the family the generator happens to default to rather than the one its essay argues about.

Where it is called

Changing this generator changes every one of these figures.

0102030405060708090020406080100120140160angle between the weld and the load, degreescapacity, kN0° · 116.83 kN45° · 127.98 kN90° · 143.09 kN×1.22along Connections

The weld that is stronger across than along

The same fillet weld, the same size, the same steel, carries twenty-two per cent more when the load runs across it than along it. The factor is exactly the square root of three over the square root of two, and it comes out of the yield criterion rather than out of a test.

 100 kNpeak 0.88Two points at maximum radiusthe radius rule finds the peak hereequal radius, stresses differ ×1 Connections

The corner that is not the worst point

Check the point furthest from the centroid. It is the standard rule for a weld group under an eccentric load, it is exactly right for some shapes, and for others it misses the peak by sixteen per cent — or picks one of four points it cannot tell apart whose stresses differ by two thirds.

The library, page 3 of 4 — where weld-direction sits