Holes in floor joists for waste pipes

[gmartine]

I just don't agree that it is something you should completely avoid doing otherwise why issue guidelines in the first place if it can't be done safely? The calculations have been made and they're issued because it can just like many other aspects of our trade.

 

[gmartine]

isnt that the wrong way eg the tabs under the timber?

In hindsight not much in it strength/stiffness wise but it might be more representative as to how it might be used when access is limited or say it was a floor joist when you wouldn't want to uneven the top surface of the joist.

 

[Rob Foster]

There are a lot of the nearly flat shower trays without an upstand being installed now so I think a lot of plumbers must be running pipes through the joists.

Slightly off topic but when you put these flat floor level shower trays in after you have tested it pack as much cheap insulation underneath in between the joists, everywhere. The drumming sound of water from the shower can be awesome downstairs as we found out a few years ago, it drowned out there telly...we were lucky cause the customers were a partltbdeaf couple who let it go ! Rob Foster aka centralheatking