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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Building Regulations and Standards: Joist floor and chimney stack

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    • CommentAuthormarsaday
    • CommentTimeNov 19th 2009
     
    Do i attach joist hangers into the chimney stack or do i trim and go around them?

    i will be spanning the joists into the party wall and off a spine wall. Span is about 4m's. i have a chimney breast in the way and it is 135cm wide. Can i hang 3 joist hangers off here or do i double up the joists at both sides of the chimney breast and run joists between these 2 doubled up joists ? if i do this should the joists between the doubled up joists be also doubled up themselves?
    • CommentAuthortony
    • CommentTimeNov 19th 2009
     
    Trim round it
    • CommentAuthortony
    • CommentTimeNov 19th 2009
     
    Double each side rest singles
    •  
      CommentAuthorjoe90
    • CommentTimeNov 19th 2009
     
    A question,

    does this trimming round also apply to new builds where flue liners made of pumice or similar are required by regs?

    Ta
    • CommentAuthortony
    • CommentTimeNov 19th 2009
     
    I think so. Once had a fabulous arguement with a BI about why I had not built my joist end into a chimney breast

    He went red in the face when :shamed: I said that I would be concerned about it catching fire !
    • CommentAuthorsune
    • CommentTimeNov 20th 2009
     
    Doc J 2.18 b) You need a min 40mm gap between the masonry chimney and structural timbers. Non structural timbers like skirting can touch provided this is OK from the manufacturer.
    It is worth having a look at diagram 21..

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