Single Shear Timber Connection. 1

[rcgrimsh]

I’m looking for help in evaluating the strength of a wood peg (dowel) connection in single shear.

I studied an old church building in which the rafter sill plate was attached to the ceiling joists with 1-inch diameter wood pegs. The pegs failed. I thought it would be a simple matter to calculate the amount of force required to cause the failure. I was wrong. I have found information for steel-doweled connections in single shear and wood pegs in double sheer, but *nothing* that discusses the strength of a wood peg (or dowel) in single shear.

Any help at all is appreciated.

 

[HeavyCivil]

If you have numbers you're comfortable with for wood pegs in double shear, just divide them by two.

Otherwise I'd imagine its as simple as:

Vn=Fc*A where Fc is the allowable stress of the HARDwood species in compression perpendicular to grain.

Maybe I'm missing something though..

 

[Splitrings]

Are you aware of American Wood Council, Technical Note #12? You may be able to make some assumptions and use this document.

http://www.awc.org/pdf/TR12.pdf

 

[MiketheEngineer]

If you know what type of lumber - you may get some values from the appropriate grading agencies??

 

[csellc1]

Try the Timber Frame Engineering Council (TFEC) Tech Bulletin 2009-01 and the TFEC Standard for Design of Timber Frame Structures and Commentary - (TFEC1-07)

I believe they have values for oak pegs