1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Ceiling joists

Discussion in 'Wood / Woodwork / Carpentry' started by pred, 25 Feb 2019.

  1. pred

    pred

    Joined:
    2 Feb 2011
    Messages:
    4,611
    Thanks Received:
    36
    Location:
    Bristol
    Country:
    United Kingdom
    Hi, could someone advise me on the ceiling joists size please, Ive got the plans but can't get hold of the architect at the moment, from wall to wall is 2700mm, it's a single story extension so will just have plasterboard to support, the architect has 150x50 SC4 common rafters, what is SC4 please, and 100x47 ceiling joists, are they the correct size joists please, many thanks.
     
  2. foxhole

    foxhole

    Joined:
    14 Mar 2006
    Messages:
    14,207
    Thanks Received:
    1,531
    Location:
    Kent
    Country:
    United Kingdom
    SC4 are high strength timbers containing very few, if any, knots. These timbers if you have them in your property, will be stamped C24 by the timber yard that supplied them.
     
    • Thanks Thanks x 1
  3. pred

    pred

    Joined:
    2 Feb 2011
    Messages:
    4,611
    Thanks Received:
    36
    Location:
    Bristol
    Country:
    United Kingdom
    Thanks for that foxhole, I'm still waiting for the architect to come back to me,, something else I'm scratching my head about, he's written, 225x50 double trimmed hip rafter, could anyone enlighten me please, I'm guessing he might mean bolting two 225x50 rafters together but I could be wrong....
     
  4. chirpychippy

    chirpychippy

    Joined:
    13 Nov 2006
    Messages:
    598
    Thanks Received:
    27
    Location:
    Kent
    Country:
    United Kingdom
    Are you hoping to do the Carpentry on this extension yourself?
     
  5. chirpychippy

    chirpychippy

    Joined:
    13 Nov 2006
    Messages:
    598
    Thanks Received:
    27
    Location:
    Kent
    Country:
    United Kingdom
    Curiously, on a roof with a span of 2.7mtrs it seems rather excessive to spec a double hip rafter when the run is only 1.350mtrs.
     
  6. pred

    pred

    Joined:
    2 Feb 2011
    Messages:
    4,611
    Thanks Received:
    36
    Location:
    Bristol
    Country:
    United Kingdom
    Not this time chirpychippy, I've got a chippy lined up for it, i haven't asked him yet, he is Polish and I am not sure if he is conversant with the terminology.
    Meanwhile my architect hasn't come back to me, I wanted the sizes to order the timber, I've been phoning around, the sawmill I used last time here in Bristol came in £200 cheaper than Selco, I found a place across the bridge which is another £130 cheaper again, £530 so any DIYers well worth a few phone calls, so the distance from
    The roof is 3000mm plus the overhang, 2700mm is the internal distance between the walls, the run is at an angle down and to the right so will probably be about 3500mm and only about 20' incline, would this warrant a double hip rafter?
     
  7. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page