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Surfaced to Standard Rough Thickness

We have received a question from a flooring company in China, they attended the grading class two years ago. They ordered two containers of southern red oak, 1com grade, 15/16" surfaced tallying as 4/4", width is 6" and 7", when they received the containers, they found that about 50% of thickness is between 22-23mm, less than 15/16"(23.8mm) and the lumber has been surfaced in U.S.. The flooring company was not unable to produce flooring of 22mm thick. They wanted to claim to the supplier,... Read More
Posted by Dana Spessert at Wednesday, November 28, 2012 | 4 comments
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Selects and minimum width

 I would like to ask your advice on interpreting paragraph 68 in the rules for Selects grade - the first sentence. It says that pieces of 2' and 3' surface measure should yield 100% OR 11/12 clear. Which one is it? Or is it in between 100% and 11/12? The reason for the 100% clear or 11/12 is that the minimum size board width for a select is 4” and in some cases the board can be 100% clear and not meet the 11/12 requirement. Example a 4 inch wide by 8 foot long piece (surface measure... Read More
Posted by Dana Spessert at Thursday, November 15, 2012 | 0 comments
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Thickness variation for 4/4

I work with a small operation with bandsaws.  Sometimes the saw cuts thin ends, usually 1/16 off the 1 and 1/8 target.  Our market rejected the whole load as thin, I know for sure its not a thin load. I wanted to know what we can do about it, if anything.  I thought there was a 1/16 variance allowed. There may be some thin in there that slipped through but I am sure its a low percent. I figured they could subtract some bdft and that would be ok. Please advice. To answer your... Read More
Posted by Dana Spessert at Thursday, November 15, 2012 | 2 comments
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Minimum thickness for kiln dried lumber

What is the minimum thickness for 8/4 kiln dried lumber? The NHLA rules are written for the inspection of green/air dried lumber and then there is a section that lists the exceptions for shrinkage after kiln drying in the rules book, page 56. Under the heading of “Standard Kiln Dried Rule” it states the shrinkage allowances for the various dimensions of the lumber including the thickness “Rough kiln dried lumber specified 3/8" to 1-3/4" thick may be 1/16" scant of the nominal thickness; 2"... Read More
Posted by Dana Spessert at Thursday, November 15, 2012 | 0 comments
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