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Incising Factor?

Incising Factor?

Incising Factor?

(OP)
Trying to design an exterior deck made out of PT wood. What types of wood need to be incised during the PT process? I am trying to figure out if I should apply the incising factor or not.

RE: Incising Factor?

It depends on whether the PT process requires it. I do not know of any that does not requires it, but, there could be some. I would assume that the incised factor would be required for any wood used for a exterior deck in my calculations.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

RE: Incising Factor?

Typically, Southern Pine isn't incised. Most other commonly used species are. Here is an bit from the wood handbook about incising.

"Incising is practiced primarily on Douglas-fir, western hemlock, and western larch ties and timbers for pressure treatment and on cedar and Douglas-fir poles. Incising can result in significant reductions in strength (Chap. 5)."

RE: Incising Factor?

Most southern pine is not incised. I rarely see incised lumber around the Midwest, however I think it varies by region.

EIT
www.HowToEngineer.com

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