Armstrong to Add Third Shift, 108 Workers in Warren by Arkansas Business Staff Posted 2/7/2013 04:22 pm Updated 5 years ago Armstrong Floor Products said Thursday that it will add a third shift to its plant in Warren, citing increasing demand for its hardwood flooring products. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access articles older than 15 days. Articles newer than 15 days are not included in this offer. Purchase Now Already have archive access? Login to view this article.