Need 4x2 joists, can I use CLS Softwood Studding 100 x 50mm x 3m (4" x 2") NOM PEFC

[JP_]

https://www.selcobw.com/products/ti...twood-studding-100-x-50mm-x-3m-4-x-2-nom-pefc

Need some new joists for floor - cannot seem to find 100mm joists (maybe looking in the wrong place) but while looking at timber for the stud wall, spotted these. Are these strong enough for floors?

EDIT

just found these

https://www.selcobw.com/products/timber-mdf-sheet-materials/treated-timber?size=34675

 

[JP_]

oh, they only sell to trades

 

[Celeronmanuk]

100mm is small for a floor joist, whats the span?

 

[JP_]

2.9m. It's what is currently down - been there since 1934.

 

[Celeronmanuk]

The tables give you about 2m depending on spacing. I'd try and get c24 in something a bit wider, or failing that maybe double them up.

 

[SFK]

Jonbey,

oh, they only sell to trades

Many of these building companies will allow you to purchase (when you buy more than one item) even though you are not a Ltd business.
Look confident when you buy, and if any issues tell then you are a Sole Trader without VAT number (Jon & Bey, sole trader).
SFK

 

[Celeronmanuk]

I was just going to post

https://www.selcobw.com/products/ti...e-100mm-x-47mm-4-x-2-kiln-dried-c16-2-4m-fscr

but see you found it!

You want treated timber for joists anyway.

 

[JP_]

found this, might be easier ... https://www.uk-timber.co.uk/carcass...er-47mm-x-100mm.html#/size-3000_x_47_x_100_mm

 

[Celeronmanuk]

found this, might be easier ... https://www.uk-timber.co.uk/carcass...er-47mm-x-100mm.html#/size-3000_x_47_x_100_mm

Same thing?

Don't know where you live, and not where i would buy from but...

https://www.wickes.co.uk/Wickes-Treated-Kiln-Dried-C16-Timber---45-x-95-x-3000-mm/p/190166

I'd still try and get something wider, c24, and/or double up if you're pushing the span. Any timber place should have this.

 

[JP_]

The Wickes one is 95mm - I see a lot this size, but I am only replacing a few joists so need 100mm or it'll be on a slope!

 

[Celeronmanuk]

The Wickes one is 95mm - I see a lot this size, but I am only replacing a few joists so need 100mm or it'll be on a slope!

Some sellers quote the finished size after planing. Check the selco small print for the finished size, it's the same. You probably won't be able to exactly match the size off the shelf. You'll probably need to use packers to sit the joists at the correct height and fix a batten to the side to hold the ceiling.

 

[JP_]

Ah, might contact my local timber merchant then.

That UK Timber site just quoted me £160+vat to deliver. No thanks!

 

[Celeronmanuk]

Some sellers (diy places) quote the finished size after planing. Check the selco small print for the finished size, it's the same. You probably won't be able to exactly match the size off the shelf. You'll probably need to use packers to sit the joists at the correct height and fix a batten to the side to hold the ceiling.

 

[JP_]

Why dooesn't anybody sell 100mm joists? It's not like it's an odd size. If I wanted 97.2mm I'd understand...

 

[cdbe]

Something wrong there surely. Are you sure they're not 4x3, or on a sleeper wall?. You'd need something like 6x2 for 2.9m. If what you end up with is too tall just notch the bottom of the ends.
Most modern stuff is nominal (100mm) regularised (planed) hence actually smaller.