rafter types

jdesbt

hi,,. does any one know what c16 means stamped on a rafter ... am i mistaken in thinking c16 means native timber and c21 is imported.. i asked my supplier for imported rafters for my house but just got enough for guide rafters first, but c16 is stamped on them

thanks

AckwelFoley

Its the strength grading of the timber, nothing to do with origin. although c24 is more likely to come from outside the UK or ireland and from mainland europe. I dont think there is a c21 timber

harry21

C16 is the grading....

See here;
http://shop.build-center.co.uk/build/choose_use_sheet/pdfs/12163%20TRAInSheetSheetTimberStghSpansA4Build_1.pdf

Edit: snyper beat me to it!!

jdesbt

so is there any way of knowing if its imported or native, or does it make a difference...(the imported was the roofers request)

heinbloed

There are usually various numbers and symbols printed on load bearing timber. Google for them.
Check the ends for saw mill seals, check if there is a FSC number on the side.