Masonry Magazine December 2016 Page. 24
process in which to pull Scaffold Grade. MSR, or Machine Stress Rated Scaffold Plank, is produced by mills visually inspecting boards to b e run through the MSR machine, which can qualify each plank for density and other characteristics defined by the SPIB grade rule. This process is also known as non�destructive proof testing, which results in more consistent flatwise bending strength in each piece compared to only visual grading for DI 65 scaffold plank. Both MSR and DI 65 are interchangeable and can be used as scaffold plank.
Visually speaking, both products appear the same. Both have a mill/grade stamp that certifies that they meet OSHA/ANSI require�ments for scaffold plank. They are both rodded, ;:;cl:.:.ii ;;.i;;.;:e:.::d;....________________________,, and embossed on the edge with the customer's name and the words "MEETS OSHA STAN�DARDS."
MSR scaffold plank takes the grade a step further with its advanced qualification and improved efficiency of pulling a higher grade. Readers should note the published letter from Bob Browder, director of the Lumber Division of Southern Pine Inspection Bureau, regarding machine and visually graded scaffold plank.
You should ask the following questions regarding suppliers and manufacturers ofDI 65 or MSR solid sawn scaffold plank:
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Does the manufacturer carry liability insurance, and do they list you as one oftheir "names insured"?
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Does the manufacturer provide a warranty?
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Is there a third-party inspection agency that oversees the grading process? (SPIB, WCLB)
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Does the manufacturer guarantee 100 percent scaffold plank in writing?
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Does each scaffold plank have a mill/grade stamp?
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Can the manufacturer supply a certificate of grade upon request?
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Are the boards identified as "SCAFFOLD PLANK" as their intended use?
No matter what grade you choose, it's important to know what you are buying andwhat is behind the grade stamp. lMAS
Jared Kennison is vice president and general � manager of Kennison Forest Products, Inc. He
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can be reached atjared@kennisonforest.com.
Know what you are buying. These photos depict MSR Scaffold Plank.
www.masonrymagazine.com December 2016 � MASONRY I 21