10/4 lumber?

[jonmnelson]

Here's a total newbie question --

I have some plans that refer to 10/4 x 3 and 5/4 x 6 lumber. What exactly does this mean? Is 10/4 another way of saying 2.5 inches, or is it something else?

Thanks for the info.

[Jeffrey Schronce]

Here's a total newbie question --

I have some plans that refer to 10/4 x 3 and 5/4 x 6 lumber. What exactly does this mean? Is 10/4 another way of saying 2.5 inches, or is it something else?

Thanks for the info.

Each 1/4 equals 1/4", so thus 10/4 = 2.5".

This system is used to differentiate between dimensional lumber (ie "2 by 4" really equals 1.5" x 3.5") and nominal lumber measurements (the "quarter" measurement you are questioning).

[mschrank]

The Wood Whisperer did a short podcast on buying wood...it talks about your question plus some other goodies:

http://thewoodwhisperer.com/?p=77

It's a bit silly, but a good one to watch before you head to the store.