Equally important, instead of the old visual grade stamp of #2, the mechanically graded Framer Series Lumber is graded M-12, which for that same 2×8 ceiling joist increases the span from 15’3” (for ordinary #2) to 18’6”! This is simply a much better stick – stronger, more stable and consistent than ordinary lumber. Weyerhaeuser is so confident in this process (used in Carolina for 9 years with great success), they offer a 2-year limited warranty against warp, covering both material and labor. As you can tell from the photos, the wood looks great and is mostly FOHC (free of heart center), which contributes greatly to its stability. ![]() ![]() As a result, they can now identify lumber that is “warp stable” – less propensity to warp as it dries. The key is computerized grading at the sawmill that has identified a predictable pattern to the defects, densities and grain structure that cause warp. Weyerhaeuser is tackling these problems head-on with its Framer Series Lumber. For example, a 2×8 #2 SYP ceiling joist (16” o.c., 20 psf live load at L/240) used to span 17’5”, but under the new span charts it only spans 15’3”.įramer Series Solution. It was basically downgraded, and the span charts that engineers, architects, builders and framers use were revised and the allowable spans reduced. Such lumber moving in your home can bow walls, ripple roofs, bind up doors and windows, creak floors, crack drywall, and basically be a homeowner’s headache and builder’s warranty expense.Īnother issue with Southern Pine lumber is that effective June 2013, the species was re-evaluated for its engineering properties and design values. As it dries, some of that lumber will warp, bow or cup. New lumber is kiln-dried at the sawmill to 19% moisture content (MC), but it still takes about 120 days for the lumber to dry down to an “equilibrium MC” of 7-10%. The Problems. Southern Pine timber that is grown for volume, harvested early, and visually graded as sawn lumber has a tendency to warp. As you may know, Southern Yellow Pine lumber is valued for its strength (for floors, headers, ceilings and roof rafters), economical price, and close proximity from East Texas, Oklahoma, Arkansas and Louisiana forests. Last month the Davis-Hawn team traveled to Northern Louisiana for an introduction to their new Framer Series Lumber, along with a tour of the Dodson sawmill and surrounding pine timberlands. To Weyerhaeuser, one of the leading forest products companies in North America, such a scene is no laughing matter. and a beautiful woman walks up to them and says “Hey big studs, I’m looking for somewood who will be straight and true, for I am only interested in a long-term relationship.” Both studs look good, of course, from the outside, but how does she know what’s inside? Did they grow up in a nurturing environment? Do they have character flaws hidden beneath their surface? Do they have a heart? Do they come with a guarantee?
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