Nucor’s board of directors has approved a $290 million investment to modernize its sheet mill in Crawfordsville, Indiana, through the installation of a construction-grade continuous galvanizing line and pre-paint line, the US-based steelmaker said Feb. 1. The continuous galvanizing line will have a capacity of 300,000 st/year while the pre-paint line will have an annual capacity of 250,000 st/year, Nucor…