Noggins (ed. Floor struts)

[Yorkblade]

Hello.

I am in the process of putting some floor joists in.
Noggins...is there anything structurally different between solid block noggins of 8x2 or using herimbone? Also, is there a general rule of thumb for how frequently you need them?

Thank you

 

[gonch69]

Herringbone is better for services and air flow where needed over solid nogs so no structural adv and rule of thumb spacing is every 2m max

 

[SFK]

As a DIYer... I typically tray and put one line of noggins down the middle of the floor from one side of the room to the other.
Was very effective in reducing floor movement.
Could not and cannot tell difference between solid or metal herringbone straps.
Use solid when tight on cash, and herringbone when have more time or utilities in way.
But had to slightly notch top and bottom of beam to put in metal herringbone to make flat surface for floor boards and plasterboard ceiling.
Toolstaion shows a good image that shows the issue.

Herringbone Joist Strut

• Galvanised steel• Prevents sideways movement• Prevents buckling of joists• Width: 32mmA superior alternative to timber strutting providing lateral support to floor joists. Position in the centre of the span where joists are 2.5m and over, and in two rows at one third and two thirds span for...

www.toolstation.com

 

[blup]

You will be grateful for herringbone when you have to put in or change services.

Blup

 

[Dereekoo]

Guidance according to TRADA tables is none at 2.5m span, 1 at centre on 2.5-4.5m span and over 4.5m one at at 1/3 and 2/3 span