Engineered I beam floor joists - costs

[dd2005]

All,

I am about to embark on an extension and was looking at using engineered floor joists (such as Steico) instead of solid wooden joists due to ease of installation of services. Does anyone know of the kind of costs before I specify these joists and blow my budget! Looking to use 200mm deep joists to match existing floor depth for a 3m span, probably Steico 200 SJ60 at 400 centres to prevent any bounce.

Thanks

 

[noseall]

Have a squint here.

 

[angelboy]

Consider contacting roof truss manufacturers as well as they often can make up these joists with calcs.

 

[tony1851]

Looking to use 200mm deep joists to match existing floor depth for a 3m span, probably Steico 200 SJ60 at 400 centres to prevent any bounce.

Thanks

You won't get any noticeable bounce with 200x50 timber joists on a 3m span, and they will be a lot cheaper than those bits of OSB with reject tile battens top and bottom.

 

[noseall]

You won't get any noticeable bounce with 200x50 timber joists on a 3m span, and they will be a lot cheaper than those bits of OSB with reject tile battens top and bottom.

The engineered joists we use are 'Easi-joists' with a metal web as supplied by Trussform. An absolute boon for electricians and plumbers.

 

[jeds]

Looking to use 200mm deep joists to match existing floor depth for a 3m span, probably Steico 200 SJ60 at 400 centres to prevent any bounce.

Thanks

You won't get any noticeable bounce with 200x50 timber joists on a 3m span, and they will be a lot cheaper than those bits of OSB with reject tile battens top and bottom.

Not a fan then Tony.

 

[tony1851]

Perhaps I'm just old-fashioned

 

[IJWS15]

We have them (OSB version)

Would not wish them on anyone.

 

[jeds]

We have them (OSB version)

Would not wish them on anyone.

Why's that then?

 

[IJWS15]

Easier to drill for services - the benefit.

How do you fit noggins . . . .

Floorboards are generally glued to them (ours are)

I get the feeling they flex more but difficult to quantify.

It is one of those things like chipboard flooring and steel studding- a benefit to the builder but not the owner.

 

[freddiemercurystwin]

If you're gonna use them then consider fitting either deeper beams or at closer centres to reduce the bounce, which can be bad. I've lived in new builds with them, very bouncy!

But totally agree the easi joists can be an absolute boon for getting a bog pipes and other services through.

 

[ban-all-sheds]

It is one of those things like chipboard flooring and steel studding- a benefit to the builder but not the owner.

And this sort of thing: