Joist Hangers - Nailed or Screwed?

[wozza]

Hi All,

 

Couple of questions about Joist hangers, (joists butted up to steel beam with timber infill)

 

1. Joist hangers, nailed or screwed (or both) - I have got twisted nails at the ready but I have always favoured screws over nails.

2. I have been advised to fit noggins between the joists to stop twist - how close to the hangers should they be and should they be the same depth as the joists and can I stagger them so they are easy to fix.

 

Thank Wozza.

 

[ProDave]

Twisted nails, it's what they are designed for.

[Oz07]

At least 50mm away to allow for the metal work and potentially any services

[ToughButterCup]

29 minutes ago, wozza said:

[...]

Joist hangers, nailed or screwed (or both)

[...]

 

Nailed.

And, to lighten your evening, have a laugh at my ineptitude while doing the same job ..... ?.

[Russell griffiths]

You can screw them but MUST use the screws supplied by the joist hanger manufacturer, you cannot use your normal wood screw. 

[PeterW]

Guide from Simpson here - it’s the US one but the screw sizes and fixtures are the same

 

https://www.strongtie.com/products/connectors/wood-construction-connectors/technical-notes/fastener-types-and-sizes

[ProDave]

18 minutes ago, AnonymousBosch said:

 

Nailed.

And, to lighten your evening, have a laugh at my ineptitude while doing the same job ..... ?.

That's just as funny reading it a second time nearly a year later.

 

Especially as I have now seen "the gap" 

[Crofter]

Nail them.

Nails for shear loads, screws for tensile.

And dwangs/noggins should either be full depth or criss-crossed.

But if you are gluing and screwing the flooring down, that will stiffen everything up a lot too.

[ToughButterCup]

12 hours ago, ProDave said:

That's just as funny reading it a second time nearly a year later.

 

Especially as I have now seen "the gap" 

 

You've also seen the trousers Dave. ?

[Construction Channel]

2 hours ago, AnonymousBosch said:

 

You've also seen the trousers Dave. ?

 

I take it Debbie was at home at the time then

 

[Adrian Walker]

I'm working on a new build and the Building Inspected told me to nail every hole on the hanger that I still have access to. Crazy  

[Russell griffiths]

2 hours ago, Adrian Walker said:

I'm working on a new build and the Building Inspected told me to nail every hole on the hanger that I still have access to. Crazy  

No, why?

thats what there designed for. 

[Adrian Walker]

17 minutes ago, Russell griffiths said:

No, why?

thats what there designed for. 

 

50+ nails per end?

[Russell griffiths]

6 minutes ago, Adrian Walker said:

 

50+ nails per end?

Why don’t you check with manufacturer, that does seem a lot. Every hole, that’s what they designed them for, that’s how they will be load tested. 

 

Are you using a jiffy hanger, the bendy ones, if so nail the full height of the joist and bend the top over and chop off with snips. 

Edited October 27, 2019 by Russell griffiths

[ProDave]

5 minutes ago, Adrian Walker said:

 

50+ nails per end?

Never seen that many. Do you have a link to the hangers you are using?

[Ed Davies]

https://www.strongtie.co.uk/products/detail/joist-hanger-with-adjustable-height-strap/769

 

Number of nails needed is quite a lot less than the number of holes. E.g., JHA270/47 has 38 header holes and 6 joist holes but, with sufficient wrap over, needs only 12 header fasteners (8 on the face and 4 on the top) and 4 in the joist.