Busbar

might check here http://cr4.globalspec.com/search/sitesearch?do=show&sort=textmatchrank&srch=busbar&srchobjs=t%2Cc&fs=12&order=asc

or here http://www.copperinfo.co.uk/busbars/pub22-copper-for-busbars/homepage.shtml

Insufficient information. If you know the density of the metal, the length, and the weight, you can use elementary arithmetic to calculate the cross-sectional area A = wt (width x thickness if rectangular), or πr² (if circular), or other formulas for other shapes.