A sheet piling (15) comprising a first flange (16), a second flange (18), a web (19), a junction (20) between the first flange and the web, the junction having a substantially concave inner surface (44), the inner surface comprising at least a first concave surface of first radius (23a) and a second concave surface of second radius (23b). The inner surface may further comprise a third concave surface of third radius (23c).