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

[cheddarone]

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..

 

[big-all]

heeelllooo cheddarone and welcome

away from the ends or centre roughly 2and 4/5ths along span maximum 25% 43mm

 

[cheddarone]

thanks a lot for your help Big-all!
Cheers Lizzy

 

[ColJack]

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?

 

[big-all]

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"

 

[xerxes]

"Multi crick" = Multikwik?

 

[dextrous]

"Multi crick" = Multikwik?

It's a chinese import

 

[noseall]

It's a chinese import

Priceless.

 

[^woody^]

Notch it like this

Untitled

• ^woody^
• 16 Jun 2008
• 7

 

[r896neo]

that it terrifying!

 

[big-all]

Notch it like this

Untitled

• ^woody^
• 16 Jun 2008
• 7

oooops you misunderstood my post take a quarter out

it is frightening
though if its a short span of say 4ft like accross a bathroom al though still frightening it wont be quite as bad

 

[ratman123]

I found this on google

http://www.trada.co.uk/faq/viewAnswer/28F42B4A-B9EE-4ADB-B22D-8C11EC1434D0