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.

AFP, a producer of lumber and engineered wood products, operates a Southern pine mill in Urbana (Union County) and an engineered wood laminating plant in El Dorado.

Kerlin Drake, vice president of marketing, said the company plans to release calculator applications for mobile devices in two weeks.

Drake said AFP’s website metrics showed that 2,700 people viewed the calculator in the first five days after it was launched on July 12.

The new design values, which Drake said reflect changes in the way timber is grown, went into effect June 1.

The calculator can be found on the AFP website at AnthonyForest.com/span-calculator.shtml.