Joist shims

[Moonshine]

I am about to fit joists into built in wall hangers.

 

If my brickies have got the levels out is there anything I can use at a shim to jack the joist up a bit to get it level?

 

 I am thinking something like these

 

Edited February 16, 2022 by Moonshine

[SteamyTea]

Don't people use bits of roof slate?

[nod]

The joists will have to sit tight in the hangers Definitely don’t pack 

The blocks should be pretty neat if they are building hangers into the 

[Temp]

I believe you can notch the bottom of the joist so start with the lowest hanger.. or is this only to stop the hanger making the plasterboard dip at the edges?

 

https://nhbc-standards.co.uk/6-superstructure-excluding-roofs/6-4-timber-and-concrete-upper-floors/6-4-13-joists-into-hangers/

 

Edited February 16, 2022 by Temp

[redtop]

I had to pack some and just used plastic packers. Given the amount timber expands and shrinks i cant see a problem and it passed BC checks

[markc]

You shouldn’t shim but it often happens. If these are not ground floor then packing puts the tops level but makes boarding the underside a real P.I.T.A.

[redtop]

Just now, markc said:

You shouldn’t shim but it often happens. If these are not ground floor then packing puts the tops level but makes boarding the underside a real P.I.T.A.

I had to after we kicked Builders off site and took it on myself. I had to get tops level. Used plastic packers and nail through bottom hole to keep em in

[Dave Jones]

seen timber frame builds sole plates packed up with window packers. Timber isnt dimensionally stable like brick and block.

[ToughButterCup]

I had your problem @Moonshine, in spades. maximum error, in places,  somewhat over 20mm laterally, and a few mm vertically.  I talked to the joist manufacturers , Cheshire Roof Trusses,  Cullens and our SE: sent them all the gory photographic detail. BH advice was also a great help. 

 

Cullens  sent me back detailed drawings of what I could do, talked to me on the phone :  very reassuring indeed.  No charge.

Have a laugh about our joists on me  (FOC)

Edited February 17, 2022 by ToughButterCup

[FrankHouse]

I know this is probably sorted but my bc rejected the brick and slate packers that had been put in as he said the can crumble and we needed to use metal or timber shims.

 

May just be his opinion but what they say goes!

[saveasteading]

On 17/02/2022 at 09:26, ToughButterCup said:

Have a laugh about our joists on me  (FOC)

Yes read that now, thanks. a belated heart from me.