Rat board?

[Jameseric]

This is my first post so plaese explain the meaning and details of a "rat board." I saw it mentioned online as part of a wood floor in a barn. I am working on remodeling a very old barn. It sounds like it may work to slow down the mice but I'm not sure of the details.

Thanks,

James

 

[vanguard cycle]

rat board aka ledger strip is usually the 2" x 2" strip that attaches to inside bottom of the girder or rim joist, the joist then get notched and sit on the 'rat board'.
pretty much a thing of the past now as local codes require joist hangers to be used in almost all applications.

 

[Jameseric]

Thanks for the answer.