Joists

[VMars]

We have ripped out the ensuite in a house we have owned for a few months and was checking the joists and was confused by this system?

Now worrying these aren’t standard joists and aren’t strong enough.

Can anyone advise if this looks ok?

It is like timber on the bottom and top and in the middle is like thinner stuff

 

[matlob]

Search for engineered timber I-beam joist.

 

[noseall]

We have ripped out the ensuite in a house we have owned for a few months and was checking the joists and was confused by this system?

Now worrying these aren’t standard joists and aren’t strong enough.

Can anyone advise if this looks ok?

It is like timber on the bottom and top and in the middle is like thinner stuff

As above - engineered joists. DO NOT CUT THEM!

 

[mrrusty]

As above - engineered joists. DO NOT CUT THEM!

What @noseall means is Do Not Cut the top and bottom timbers in any way. It is possible to make holes through the centre web for services, but refer to the detailed instructions from the i-joist suppliers e.g. https://elliotts.uk/ideas-and-advic...haE2vTFtQPmPOJmWlSG3N5dD2FwnrijTyeJy9Elbzj-7d

 

[blup]

They are find s d are designed for the loads the take. OSB is much stronger than it appears

 

[noseall]

They are find s d are designed for the loads the take. OSB is much stronger than it appears

Correct. They work in composite and in a certain direction. Torsion - not so clever, but that should never be an issue.

 

[stevie888]

Several types available reproducing the style of a steel beam where the top and bottom bits do most of the work.

Lighter than solid timber, should be straighter and available in deeper and longer sizes. The downside is that they need proper detailing and support at joints and need careful handling.

 

[VMars]

Ok thanks all

 

[VMars]

Hi,

Just to follow up, noticed my hisband accidently nicked the top fo the joist when he was removing the flooring

Is this a issue?

 

[mrrusty]

no. that's fine. not enough to be a problem

 

[VMars]

Just noticed this guessing this will be as bit more significant

Got someone coming to look shortly but if need to replace is it fairly straight forward to replace with a I joist

 

[stevie888]

The top flange is less critical than the bottom as the flooring stiffens it up