ABC Supply Co., the nation’s largest distributor of roofing, siding, windows and other exterior building products, has promoted 20 branch managers around the country to managing partners. They are Steve Colton of Neenah, Wis.; Ray Coxe of Delran, N.J.; Jamie Crawford of Salisbury, Md.; Gregg D’Angelo of Youngstown, Ohio; Dennis DeBolt of Santa Rosa, Calif.; Stephen Duggan of Conley, Ga.; Mark Forbes of Rockford, Ill.; Bob Gieseman of East Peoria, Ill.; Brian M.
