Anthony Forest Releases Online Lumber Calculator by Jordan King Posted 7/22/2013 12:00 am Anthony Forest Products of El Dorado launched a lumber span calculator on its website to help craftsmen adjust to a recent industrywide change in design values for Southern pine dimension lumber. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 20 days. Purchase Now Already have archive access? Login to view this article.