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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorEd Davies
    • CommentTimeAug 23rd 2016
    Today I took delivery of a piece of timber. It was the wrong size and they're replacing it but they left it with me for no particular reason (it's a bit of an odd size so understandable). After the driver went I noticed that though it's supposedly C24 there aren't actually any grading marks on it. They're a reputable chain of timber merchants so I really doubt there's anything fishy going on and it's a solid looking piece with no significant knots or anything so it seems likely it meets the grade and I have a delivery note saying it's C24.

    Still, if the replacement arrives unmarked as well, should I accept it, or is there too much risk the BCO will say nope, replace it? To put it another way, when you order graded timber is there an implicit contract to deliver properly marked stuff? I think so.

    If you're curious, it's the replacement for the cracked post mentioned here: https://edavies.me.uk/2016/06/frame_up/ and it arrived as 125 mm squared rather than 145 mm squared.
    I always bang on, when teaching, about all timber being marked, but having said that, the BCO neither looked nor asked with the last extension I built.

    I would ask them to bring their stamp and pad. I was delivered a load of C16 instead of C24. They told me it was good for either, got out a spray can and sprayed over the C16 mark and stamped a new C24 mark.... The invoice says C24.
    • CommentAuthortony
    • CommentTimeAug 23rd 2016
    visual inspection but often all larger sizes are ok to be graded as C24 -- no big knotts or shakes :)
    • CommentAuthorEd Davies
    • CommentTimeAug 23rd 2016
    Thanks Nick, what I thought: the stamp's important.
    • CommentTimeAug 25th 2016
    The only time I got a piece unmarked was when the yard had to make it from a larger piece of stock. They called and asked whether either I or the building inspector would be bothered, which fortunately he was not, given where it was coming from.
    • CommentAuthorEd Davies
    • CommentTimeAug 25th 2016
    AIUI, you can cut graded timber crossways and still maintain the grading but as soon as you rip it it needs regrading. Rip a piece of C24 down the middle and you don't get two bits of C24 (or even two bits of C12 :surprised:). So, yes, if they cut a long bit of graded in half and you happened to get the half without the stamp that'd be fine if the BCO accepts the story.

    Lots of my little stub posts at the edge of the A-frame are cut off from the longer posts and so don't show a grading mark but I'm not worried about that as it's obvious what I've done and that they're the same wood as the main posts. This new post, though, is obviously different (e.g. rough sawn rather than planed) and would definitely attract the BCO's attention.
    • CommentTimeAug 25th 2016
    My piece was made by planing the sides IIRC. But there was no stamp on the end either for some reason, I forget the details.
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