Construction Grade or Standard Grade

[ghcaste]

Hello,

I am working with Canadian Standard CSA 086. I want to specify 4x2 joists but when I look at the table 531B for specified strengths for Light frame grades, I do not know what's the difference between Construction Grade and Standard Grade. Anyone who can help me?... Thanks!!!

 

[MiketheEngineer]

In the USA we have NDS which will give you specific info. You might want to use that or the Canadian equal. Also APAWOOD on the net might be helpful

 

[TLHS]

Are you asking what the difference is from a design standpoint (i.e. how strong they are), how you specify it, or what the physical differences are?