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I'd like to calculate how much pulpwood (logs/poles) it takes to make OSB. Let's use L-P's Grayling plant as an example again. RDD determined it produces 165,000 (165,235) tons per year (450 million sq ft at 1/4" basis). So how many tons of pulpwood will it take?

In the paper industry it takes approximately 1.4 tons of pulpwood or scrap paper to make 1 ton of paper. I haven't found the calculation / formula for wood products.

The answer might be at this site but I could sure use some help understanding it http://www.ruraltech.org/projects/conve ... mbined.pdf

As always thanks!

I did a little research and was quite surprised by what I found. Moisture content of fresh cut timber can range from 75% to 110% (oven - dried basis). In the case of Grayling, that would mean 165,000 tons x 2 = 330,000 tons of raw wood was hauled in for processing.

I wouldn't call it pulpwood That implies the timber was used to make pulp in the paper making process.

I also found they figure 8.5% of the weight of dried manufactured wood (plywood, OSB etc) is glues, resins, and additives.

Any more questions? I'll let Saturnalia check your math

Thanks again, RDD. I really appreciate your response.

I've been reading and came up with 1 ton of board to 1.5 ton of logs. But you've got better knowledge so I'm going with your answer .

Raildudes dad wrote:I did a little research and was quite surprised by what I found. Moisture content of fresh cut timber can range from 75% to 110% (oven - dried basis). In the case of Grayling, that would mean 165,000 tons x 2 = 330,000 tons of raw wood was hauled in for processing.

I wouldn't call it pulpwood That implies the timber was used to make pulp in the paper making process.

I also found they figure 8.5% of the weight of dried manufactured wood (plywood, OSB etc) is glues, resins, and additives.

Any more questions? I'll let Saturnalia check your math