Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations Toost on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Stacked log header

Status
Not open for further replies.

COEngineeer

Structural
Sep 30, 2006
1,186
Ok, usually when I use 2x header i just put them right next to each others. But what if you are building a log home and use bigger beam? I have a header that is about 8 ft long. I want to use 10x8 stacked on top of each other. How do you connect the 2? Do I need to worry about shear flow? I know the 2 can handle the moment but I am afraid if I connect them together I will have failure at connection.
 
Replies continue below

Recommended for you

You only need to design for shear flow if you are trying to make a composite section out of the two logs. If the strength and stiffness of the two individual logs, added together, is sufficient, then you need not make them into a composite section.

DaveAtkins
 
If you do need the combined section properties calculate the combined section and do VO/I to determine shear flow. For an 8 ft long header just use the maximum shear and the minimum area. If you are bolting the logs together with a vertical bolt, the minimum areas are where the bolt hole is taken out. I do the same on log homes when I use double logs for a header or girder. It's just a little harder to calculate the exact properties so using the maximum enclosed rectangle inside the log is very conservative but simplifies the calculations. NDS-97 allows you to use a rectangle of the same crossectional area as the log which is a little less conservative. I'm not sure if there were changes in that in NDS 2005.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor