? largest diameter hole that can be drilled in a joist?

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Hi I'm trying to fit a multi crick to a new toilet in my bathroom.
Question what is the largest diameter hole that can be drilled in a 175mm x 50mm joist? C16 grade timber..
 
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heeelllooo cheddarone and welcome :D :D :D

away from the ends or centre roughly 2and 4/5ths along span maximum 25% 43mm
 
I must not speak structural engineer..

all i got was the 25% of joist height or 43mm in this case..

what was all the 2and 4/5ths about?
 
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I must not speak structural engineer..

all i got was the 25% of joist height or 43mm in this case..

what was all the 2and 4/5ths about?

not in the first few inches not cenrte span cant remember exact distances ;)

ok not the first or last 25% off the span nor the centre 20%

or in a 10ft not the first 2ft6" the middle 2ft or last 2ft6"
 
It's a chinese import :LOL: :LOL:

Priceless. :LOL:
Mutley_laughing.gif
 

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