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Re: Spruce and Fir Questions #7841 02/24/02 01:26 AM
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John Milburn Offline
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I thought a timber was a minimum of 5"x5" John.

Re: Spruce and Fir Questions #7842 02/27/02 09:05 PM
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Right. If both dimensions of the cross section are 5-inches or greater, then the classification of "beam and stringer" and "post and timbers" applies. You can use a "beam and stringer" in compression or tension if you want. Likewise you can use a "post and timber" in bending. The point is that the grader looks at the pieces differently (with respect to defect type, size, and location) and the individual pieces have different design values. A 4x8 falls under the "dimension lumber" classification -- yet another set of design values.

Re: Spruce and Fir Questions #7843 02/28/02 08:00 AM
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Ken Hume Offline
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Dick,

Is there a web site where I can check out the dimensioned lumber values or do you have the name of the full publication so that I can purchase it ?

Ken Hume http://www.clik.to/WorldofWood


Looking back to see the way ahead !
Re: Spruce and Fir Questions #7844 02/28/02 02:53 PM
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The specification of the categories and the design values for both dimension lumber (width < 5") and heavy timber (width >= 5") are in the National Design Specification (NDS) for Wood Construction supplement: Design Values for Wood Construction. It is published by the American Wood Council of the AF&PA. http://www.awc.org/ Click on Design Standards.



[This message has been edited by Dick Schmidt (edited 02-28-2002).]

Re: Spruce and Fir Questions [Re: Ken Hume] #20059 06/01/09 11:20 PM
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Testing posts


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