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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Building Regulations and Standards: Load requirements for a domestic roof

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  1.  
    • CommentAuthorha55an_a
    • CommentTimeFeb 22nd 2008
     
    Does anybody know what the minimum loading requirements are for; (1) domestic flat and pitched roofs and, (2) Commercial flat and pitched roofs?

    Thank you,

    H
    • CommentAuthortony
    • CommentTimeFeb 22nd 2008
     
    Sorry don't understand the question do you mean snow loads, wind loads, people sitting on them, weight of water? or what?
    • CommentAuthorjon
    • CommentTimeFeb 23rd 2008
     
    BS 6399
    • CommentAuthorha55an_a
    • CommentTimeFeb 23rd 2008
     
    Tony,

    Sorry I just realised my question was rather unclear! I was after the requirements for dead and imposed loads...
  5.  
    Get a copy of "structural engineer's pocket book " by fiona cobb ,isbn 0-7506-5638 has all the figures you need obviously the answer will depend on certian things such as snow zone etc. it is a very compact little book with loads of info and doesn't cost much. If you dont understand how to use this info though a usefull introduction is "structures for architects" by bryan jb gould, isbn 0-582 23658-4
    both were available on amazon when i bought them.
    • CommentAuthorchipedwood
    • CommentTimeFeb 29th 2008
     
    Well it very much depends on the roof. The building regs give some guideline that I have in front of me.

    A brief they give is 1.00kN/m2 for spans not exceeding 12m. - 1.50kN/m2 for spans not exceeding 6m (imposed)

    The book I have is Building regulations in brief - Ray Tricker
    Good book but because it is as the title says brief it says nothing about dead loads sorry.
    • CommentAuthorneilu
    • CommentTimeMar 2nd 2008
     
    Dead load is the weight of the roof structure itself so it depends upon the construction.

    I assume you are looking into this for a project of your own.

    If your roof is going to be a fairly simple construction, architects use (and building regulations part A refers to) a TRADA document called 'Span tables for solid timber members in dwellings' to specify timber joists sizes for flat roofs and rafters.
    I used to have it on my computer, don't know if I still do, but I'm sure it describes the load requirements.

    If the roof is not covered by this document then you ought to speak to a structural engineer.
    • CommentAuthorciderman
    • CommentTimeJan 7th 2009
     
    hi, i am interested as well. I am 18 years out f the industry but like to stay informed. And i am planning a roof job at home, so i want to get it right!
    • CommentAuthorTheDoctor
    • CommentTimeJan 8th 2009
     
    depends where you are too.

    wind / snow loads are a little different between Fraserburgh and Tetbury!

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