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Trus Joist MacMillan says that its new Parallam PSL structural timber virtually eliminates the use of steel or flitch beams as structural components in timber-framed buildings or within traditional roof construction.Parallam is a parallel strand laminated lumber and is available in lengths up to 20 m and sections up to 280 x 450 mm.The product is claimed to perform as well as steel, but has a greater strength to weight ratio. It can be cut, drilled, nailed and jointed with conventional ...

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