BS7671/ drilling joists.

[Peter Pryor]

Hi all, my name is Pete and I’m new to this site.

Could anyone clarify the following question for me please.

Does BS7671 cover rules on acceptable locations to drill holes in joists in commercial properties. If so could anyone state the page number where I could find this. I’ve been working on a site and the question was raised.

Thank you in advance.

Pete.

 

[loz2754]

Only insofar as BS7671 instructs that we follow any applicable building regulations. The requirements for drilling joists are in Part A of the building regulations.

 

[Peter Pryor]

Only insofar as BS7671 instructs that we follow any applicable building regulations. The requirements for drilling joists are in Part A of the building regulations.

Thank you, would you know the location in 7671 where it refers to building regulations ?

Thank you.

 

[nicebutdim]

Thank you, would you know the location in 7671 where it refers to building regulations ?

Thank you.

522.8.14

Also section 1.2 of On Site Guide

 

[loz2754]

Also 114.1 in conjunction with appendix 2.

The On Site Guide has a brief summary and diagram on page 91 of the current edition.

 

[Peter Pryor]

Thanks very much for all your help.

 

[telectrix]

basically, it's between 0.25 and 0.4 of the span of the joist. minimum of 2" below/above top or bottom. holes to be separated by 1.5 x the holesize.

 

[loz2754]

1.5 x the holesize.

Holes to be separated by 3 X the diameter.