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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Notch, Hole and Chase Sizes
Hi all
Reviewing Part P last night there is a reference to Part A for notch and hole sizes in joists and chases in walls. Looked through Part A and can't find any sign of this. Am I missing something here? I have found other reference on diydoctor but not "official" data. Phil |
#2
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Notch, Hole and Chase Sizes
"TheScullster" wrote in message ... Hi all Reviewing Part P last night there is a reference to Part A for notch and hole sizes in joists and chases in walls. Looked through Part A and can't find any sign of this. Am I missing something here? I have found other reference on diydoctor but not "official" data. Phil This is approved Document A-Structu of the Building Regulations. ..a. notches should be within the following limits: · no deeper than 0.125 the depth of the joist · not closer to the support than 0.07 of the span. · not further away from the support than 0.25 times the span. b. holes should be within the following limits: · no greater diameter than 0.25 times the depth of the joist. · made at the neutral axis (where the joist is under least tension, normally at the centreline of the joist depth). · not be less than 3 diameters (centre to centre) apart. · located between 0.25 and 0.4 times the span from the support. Note that notches and holes are not permitted in roof rafters, to prevent damage to the roof structure. Jaymack |
#3
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Notch, Hole and Chase Sizes
"John McLean" wrote This is approved Document A-Structu of the Building Regulations. .a. notches should be within the following limits: · no deeper than 0.125 the depth of the joist ............snip Thanks John But I looked through the on-line version of Part A - 2004 and couldn't find that stuff anywhere! Which year/edition did you get these from and page number? Are my glasses in need of replacement or something? TIA Phil |
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