CRS ratings

[sapahesi]

Can anyone tell me what the new gradings are for CRS, as I gather the ratings changed a few years ago? I know they range from C16 - C24 but don't know how they relate to some old drawings I have.

The timbers are:

100 x 50mm at 350 CRS

175 x 50mm at 350 CRS

100 x 50mm at 500 CRS

Many thanks, if anyone knows!!

 

[TicklyT]

I thought Crs was an abbreviation for the distance between the centres of the timbers.

 

[gregers]

think op means C.L.S timber,take a looksie at the link.
http://www.woodforgood.com/pdf/Constructionfactsheet.pdf