For example, to handle three workers (250 lb. The longer the span between supports, the less weight the board can safely handle. Solid-sawn planks are available in lengths from 8 ft. This last step helps to prevent splitting if a plank is dropped on a corner. Manufacturers often take steps to extend the life of their planks: They seal the end grain against moisture, they insert rods through the ends of planks to prevent cupping and to keep them from splitting along their length, and they clip the corners. Though OSHA does not require it, scaffold-grade boards from reputable manufacturers also should carry a stamp that includes the grade, the moisture content (no more than 19%), the lumber-mill name and/or number, and the seal of an approved third-party inspection agency. For example, the West Coast Lumber Inspection Bureau grades scaffold planks, in descending order of strength, as “dense premium,” “premium,” “dense structural,” and “select structural.” No matter the species, scaffold planks should be labeled as such and clearly distinguished from construction-grade boards. Planks also can be made from Douglas fir and similar species, and these have their own grading nomenclature. DI stands for “dense industrial”-in contrast to construction-grade boards, which are graded “structural” or “dense structural”-and the number represents a strength ratio in which the higher the number, the smaller the knots and the straighter the grain. The most common wood used for solid-sawn scaffold planks is southern yellow pine, which the Southern Pine Inspection Bureau grades as DI-65 or, less commonly, DI-72.
Many of these problems can be prevented with proper care, but if a plank’s condition makes you question its strength, discard it. Splits, sawkerfs, mold and mildew, insect damage, and delamination (in the case of LVLs) are examples of conditions that could render a plank unsafe to use. If you work on scaffolding, be sure to inspect planks regularly for damage that could compromise their strength. Construction-grade boards are rated for their capacity to handle building loads, not the loads created by workers and their equipment. No matter how sturdy those extra 2x10s might appear, don’t be tempted to use them on scaffolding. Several options exist for wooden scaffold planks, but construction-grade lumber isn’t one of them. Having well-built, sturdy scaffolding won’t matter, however, if the board you’re standing on isn’t meant to support the load you’re putting on it. OSHA estimates that 4500 injuries could be prevented every year by following its regulations on scaffolding and by training all workers in safe practices. A 2009 survey by the Bureau of Labor Statistics found that 54 workers died in falls from scaffolding. 3 on OSHA’s list of most frequently cited violations, and for good reason. Q6: How is your factory production capacity? 65 containers (1200 tons) materials can be delivered per month.In 2013, scaffolding was no. Wedge clamps were test in SGS Shanghai and Element Houston USA as per Brand test plan. Ringlock system products welding and materials test in TUV Shanghai and Element/Test House from UK.
Q5: Have you test you products? We test mechanical property/welding penetration test for each batch. Golden manufacturer certified by Made-in-China website. Audited and certified by NASC and QSI with Grade A result from UK.
Scaffold plank iso#
We have ISO 9001:2008 by Sira Certification Company. Q4: Could you supply the certificate for us? Yes. Q3: How does your factory control quality? We have a strong technical and QC team with 7 members to guarantee our products design and quality control are locating in the leading position in scaffolding manufacturing industry in China. Q2: Are you maufacturer or trading company? We are really maufacturer factory with 12 years experience of Ringlock system and wedge clamps. 40 mins to Ningbo Beilun deep water port. We are located in Dongqiao town, Yingzhou District, Ningbo City, and 15 mins to Ningbo Airport , 30 minutes to Ningbo Railway Station. Company Information Q1: Who is Shengerjie Scaffold? Shengerjie Scaffold was established in 2008, specializing in Modular Ringlock System and wedge clamps manufacturing for 12 years.
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