1x Structural Wood Members?
1x Structural Wood Members?
(OP)
I am working on a project that would like to use 1x material (ie. 1x2, 1x3 and 1x4 boards) in a structural application where there is primarily tension and compression with some combined bending. Table 4A along with its adjustment factors is for dimensional lumber with a min. thickness of 2" nominal. Table 4E and corresponding adjustment factors are for decking. What would be the appropriate reference design values and adjustment factors to use in this application?
RISA 3D will not me do any checks for lumber this size, I'm hoping there is a work around.
RISA 3D will not me do any checks for lumber this size, I'm hoping there is a work around.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com






RE: 1x Structural Wood Members?
RE: 1x Structural Wood Members?
RE: 1x Structural Wood Members?
RE: 1x Structural Wood Members?
I would tend to agree with that statement. Perhaps that is why the NDS restricts it mention of sawn lumber to 2x material. I agree also that this is not typical construction.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: 1x Structural Wood Members?
RE: 1x Structural Wood Members?
RE: 1x Structural Wood Members?
Given the way the 2",3" & 4" sizes are lumped together in the table and the same values for the different thicknesses at this depth the logical conclusion would be that the factor would be CF = 1.5 for 1x2, 1x3, and 1x4 boards.
I sent an email off to AWC support and they suggested I contact the grading agencies with my question.
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: 1x Structural Wood Members?
______________
MAP
RE: 1x Structural Wood Members?
I don't think there are any smart savings to be had here. If you can satisfy it with a 1x4, you're probably better off using a 2x4. no.1 no.2 SPF and move on.
RE: 1x Structural Wood Members?
A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com
RE: 1x Structural Wood Members?
RE: 1x Structural Wood Members?
I would proceed carefully when using 1X lumber in a structural application.
I have been involved with a recent project using P/T 1X material. The quality of the logs that these 1Xs were cut from was horrific. Some portions of some of the 1x4 & 1x6s actually had the grain pattern of a burl. Far too many loose knots as well.
If you can selectively find reasonably clear & straight grained 1X boards, you may be fine. I just have a real problem with the quality found in my region.
Ralph
Structures Consulting
Northeast USA
RE: 1x Structural Wood Members?