Does Residential Contractor Bond cover Apartments?

[Jeremy Seely]

I'm doing research on a contractor I am considering hiring to replace some stairways at my 10-unit apartment building. Searching his company info on the Oregon Construction Contractor's Board site I see that he has a Residential Surety bonding but not Commercial. 

When it comes to bonding, I'm not sure which category my apartments fit in; I don't want to hire a company whose bonding won't apply to my building. Does anybody know the answer to this?