Roof joist

GT60

Hi roof for the extenson has gone up and the roof/celling joists that run wall to wall 3.5 MTR's and you put the triangle bit of the roof on top of them.
Well the building insepector say's it should have a piece of wood running down the middle joining all the joist's together.
Well the builder say's it doesnot need it as the roof is small.

The roof is about 5 foot high and 3.5 mtr's x 4.5 mtr's
The hight measurement is from the window lintel standing on the scaffolding.

Who is right??
I hope this makes sence
Thanks Niall

frogga

I would do wot inspector says he is the one who signs it off, plus you are only talking about a few quid and little effort and belt and braces gives peace of mind.

duncan303

Did the inspector ask what the roof covering is?

what grade of nonloadbearing joists are you using and most importantly;

what crossection joists and spacing?.

then look up in the building regs the correct table.

HTH

by the way I would go with the DS every time..


..

leveller2911

Hi OP think the timber your referring to is called a "Binder".It sits on top of the Joist from end to end ,nailed into each joist.Then generally speaking there is also one half way up the rafter (each side) called Purlins.Then you have a "strut" (timber) nailed on the underside of the purlin one end and sitting on the binder running through the middle of the joists.

In my opinion if the joists are 3.5 mtres long then yes you should have a binder.The binder will take any "spring" out of the joists.What size ceiling joists are specified? 150x50? 175x50? 200x50? 225x50?

GT60

leveller2911 wrote: »

Hi OP think the timber your referring to is called a "Binder".It sits on top of the Joist from end to end ,nailed into each joist.Then generally speaking there is also one half way up the rafter (each side) called Purlins.Then you have a "strut" (timber) nailed on the underside of the purlin one end and sitting on the binder running through the middle of the joists.

In my opinion if the joists are 3.5 mtres long then yes you should have a binder.The binder will take any "spring" out of the joists.What size ceiling joists are specified? 150x50? 175x50? 200x50? 225x50?

Thats it!!a binder the joist's look like the same size as the floor joist's but i will measure them tomorrow.
Just looked at the plans and it say's
" Pitch 21deg tile finish to match existing on 18x 35 battens"???????

Hope this helps will report back tomorrow with measurements.

Does the builder need the plan specification notes the writing that tells him all the techy stuff?
Thanks Niall

leveller2911

Hi Niall,

The plans may well state the dimensions of the binder so if its there then yes show him.TBH he should have a copy of them from the start.
The building control officer will need to "sign off" the job as being completed so the builder should keep him happy.Its no big deal putting the binder in......... Its a small job

The spec notes tell the builder what should be used.Generally speaking when an unforseen problem arises BC officers are there to advise on what solutions are acceptable.Many small roofs look like a forest of timber when finished,almost over engineered but generally its all done for a reason

FilthyLuka

it'll be a big binder running 4.5m, good thing the inspector spotted it or you would have a bent ceiling

keystone

The builder should take notice of the BCO irrespective and if he wants to argue he shouldn't inolve you as piggy in the middle.

Cheers

GT60

HI the wood joists are 150 x 50mm and the binder thingy will be in place because i have just told the Building inspector what has been said.

Thanks everyone Niall