When does plumber first fix

[Millsy 82]

Why would you do copper before floors on a tji? You can't notch it so won't make an odds other then the bird cage being in your way as there's no floors in the plot

Sorry didn't read all the replies.

 

[AWheating]

Thanks can the pre knocked out holes be knocked out anywhere on the span or is it 0.25 to 0.4 of the span like on normal joists. And for drilling is it 0.25 to 0.4 of the span

no the 0.25-0.4 is for standard timber joists, most with the knockouts can be drilled almost anywhere apart from a small distance from wall/support (around 150mm) and a small distance from top and bottom flange (around 30mm) distance betwen holes is normally the same as standard joists (2X betweeen edge of holes)

 

[hammers4spanner]

Some of you guys are forgetting where you are in list of priority trades, i wouldn't worry about the sparks and their well groomed hair silly sunglasses and pathetic plastic boxes turning up on site with their boyfriend in tow.

You are PLUMBERS the top trade that all others wish they were cables in the way just get your snips and chop them out or rub all the markings off the cables.

Remember a property without water is nothing more than a shed.

SPARKS pfffft

 

[joni os]

Post 22 is excellent advice. If copper pipe you will install from below, through holes drilled by yourself. Manufacturer's instructions should be read, edge of hole 30mm from flange, if spec.
says 3mm its a misprint. 15mm pipe no problem, 22mm will require a bit of flexing.
The fact you have been called in early suggests site manager is unfamiliar with tji system.
Resist all instructions to notch flanges.