solid framing from top to bottom
ENGINEERED CEILING JOISTS
Longer, Stronger and Straighter. The design values for our structural finger-jointed products exceed national code standards making them a custom alternative to costly solid-sawn dimensional lumber. WWPA Span Tables
MCL LUMBER PRODUCTS AVAILABLE IN THESE SPECIES
Our Douglas Fir raw material comes from the highest quality Douglas Fir mills in the Pacific Northwest. Douglas Fir (DF) is often the standard against which all other framing species are measured. Its strength combined with a superior strength-to-weight ratio, high specific gravity (for excellent nail and metal truss plate-holding capability), excellent dimensional stability (giving “green” DF products the ability to season well in service), the moderate decay resistance of its heartwood, and documented excellent performance record against strong forces resulting from winds, storms and earthquakes, have given Douglas Fir its reputation. It is also tight knotted and close grained, adding the bonus of beauty to its structural capabilities.
Hem-Fir is a species combination of Western Hemlock and the true firs (Noble, California Red, Grand, Pacific Silver and White fir). With strength properties slightly below Douglas Fir-Larch, this is an extremely versatile species group.
SPF Spruce-Pine-Fir (South)
This species combination, classed as moderately strong, is cross-continental in origin. Because of similar design values, the combination includes Engelmann and Sitka spruces, and Lodgepole Pine from the West, along with Balsam Fir, Jack Pine, Red Pine and several eastern spruces from the U.S. Northeast. SPF-S grademarked products may originate from either region and be graded either by or according to grading rules published by WWPA, the West Coast Lumber Inspection Bureau (WCLIB), or the Northeastern Lumber Manufacturers’ Association (NELMA).
SPF-S design values make it appropriate for general framing applications. In the higher, structural light framing grades, dimension products are appropriate for light trusses and other engineered applications.