Wood bearing resistance around bolt hole 1

[gasma1975]

Hi,

I have a wood connection problem. If I have a [2x12] laying flat and I have a bolt with a washer. How do you calculate the bearing resistance of the wood under the washer. The force acting on the bolt is perpendicular to the wood. (see image below)

thank you

 

[ash060]

The bearing reistance would be the area under the washer (Area of washer minus area of hole) times the allowable compression prependicular to the grain. NDS section 3.10.4 specifies that lb used for the calculation of the bearing area factor for washers shall be equal to the diameter. One thing to remember is that Fc(prep) is one of the few cases where a load duration factor is not used.

 

[MiketheEngineer]

NDS

 

[woodman88]

If this is a connection then where is the force coming from and going to?
Say that you have a 2x12 bolted on top of a steel beam and you place a upward load at one end of it and calculate the force at the bolt/washer. In this case you have a high need IMHO to also check the 2x12 for cross bending at the washer.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.