Cross nailing of roof trusses?

cookie_monster · Dec 06, 2011 2:27 pm

My building inspector reported that the roof trusses were not cross nailed.

The builders had the frame inspected by their inspector and it was apparently all passed.

We are currently at a stalemate.... I assume that cross nailing is part of the building standards\requirements ?

Bit out of my depth here, any help much appreciated.

Stewie D · Dec 16, 2011 9:11 am

By cross nailing , I assume you mean cross bracing?
Not only building requirements regarding bracing but probably the roof truss manufacturer as well.

Stewie

RocksInHead · Dec 16, 2011 12:43 pm

I too am a bit confused with 'cross nailing'. It could be that the trusses are not nailed from both sides where they join the top plate
(the horizontal timbers at the top of the walls) or it could as Stewie has indicated, cross bracing where there is (or should be) metal straps running in a big cross in a number of places over the trusses.

Talk to your inspector, explain the situation and get the details of the regulation clause that he has claimed in error. Try to use your inspector to sort this out. He would be seeing these type of situations every single day!

Also talk to your roof truss supplier as to installation requirements. Get them out to inspect it if things continue to stall.

Without either the clause in the regulations or a clear breach of the installation instructions then your builder is unlikely to move.

Regards

RiH

cookie_monster · Dec 16, 2011 12:44 pm

ok, have clarified this with my OH now, the cross bracing is done, but the skew nailing is not done.

Does that make more sense?

will try and take some photos today and contact the truss manufacturer........

room4acubby · Dec 16, 2011 1:35 pm

Just to clarify what skew nailing is. Here is an extract from AS1684 - Residential framed construction
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Stewie D · Dec 21, 2011 1:00 pm

I would have thought that the tie-downs and cross bracing would have been much more important than the skew nailing as room4acubby shows above.
http://i1212.photobucket.com/albums/cc455/stewiesno1/mc_ancillary_triplegrip_image_l.jpg

Stewie

Hitchy · Jan 03, 2012 1:55 am

Skew nailing/cross nailing.
I had a few trusses that needed skew nailing.
The major trusses were made as two identicals in 35mm and had to be nailed together on site to make one big truss.
Was all in the instructions from the truss company.
Specified spacings etc (300mm from memory).
As mentioned above, did skew nail each truss to the top plate but then went around with truss grips later as per instalation instructions.

Trojanshouse · May 22, 2012 8:09 pm

Hi all,

does this mean the trusses have to be skew nailed in any aplication? even with cross bracing?
I am interested as I am building a 3m wide shed (14m long)

Tro

Stewie D · May 23, 2012 10:08 am

Yes they should be and depending on where you are ( wind loadings ) and what the structural engineer comes up with, probably tie-downs every second one as well.

Stewie