Care is needed in detailing welded joints of the T and corner type, where restrained weld shrinkage forces are transmitted through the weld into a plate in the through-thickness direction. The tensile strength in the through-thickness direction of a relatively thick plate, say over 20 mm, is lower than the tensile strength in the plane of the plate. The reduction in strength has been attributed to non-metallic inclusions produced during the plate rolling process.