When does plumber first fix

[Mgrant]

On a building with modern engineered joist that you knock out. When do you first fix usually after the floor and all stud walls have gone up?

 

[lame plumber]

preferably before the plasterers arrive and cover things up or the chippies board the floors

 

[gasmanrob]

Yeah then you drop your rad tails in the stud work, turn your domestics up in place for bathrooms. Then sparks do there bit then chippies add noggins for rads, dry liners in, mist coat, then free for all on second fix and finals

 

[Mgrant]

Thanks got one to start with no floor down upstairs or stud work yet. But work want me to start it explained there wasnt much can do yet.

 

[SimonG]

I like to have the floors down, studwork in and boarded on one side.

 

[Mgrant]

Suppose all I can do is get the pipes some were close to were I think the stud walls go up.

 

[jldplumb]

On a building with modern engineered joist that you knock out. When do you first fix usually after the floor and all stud walls have gone up?

yep,after the 1st floor is down and stud work is up. sometimes you'l have one side boarded.
PM me if you want the measurements we use for tail, rad heights etc.

 

[Mgrant]

The knock out holes on the engineering joist look a fair bit out of alignment has anyone had this before? Also can you knock the pre made holes out anywhere on the run?

 

[gasmanrob]

Knock out only ever line up for sparks and thier flexible cables. Better off to drill the plot out

 

[Mgrant]

Can you drill these joists ?

 

[Ch4 plumbing]

Check the MI's.

 

[Mgrant]

Should the site have these?

 

[Ch4 plumbing]

Yep every site I've worked on the site agent has a copy, if not then wait for confirmation but as a start do NOT drill/notch the top or bottom part, sounds obvious but some think it's okay!!

 

[Mgrant]

Thanks.

 

[Millsy 82]

Is it copper or plastic being used?

If it's copper you need to be before the floors and stud work go in find out the sizes of rooms then bring pipes up where needed, if it's plastic then after floor and stud work.

 

[gasmanrob]

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

 

[hammers4spanner]

Listen to the above^^^^^

 

[kris]

I would first fix once the upstair floors are down but no floor downstairs ( if solum ) . B4 any plasterboard and most important b4 the sparks lol

 

[drip-dry]

about 3 or 4 hours BEFORE the electrician does his first fix....

 

[Mgrant]

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

 

[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.