Hi Knowledgable Ones.
I am close to fitting the first floor joists in my extension, and the BCO has suggested a Ledger board & Hangers to attach to the existing gable end wall, and then to build the other ends into the new wall.
I have 2 questions;
1 - The inner skin of the new wall is made of light weight Aerated blocks (3.6Kn), and the joists are going to be 220x38. Is it OK to sit the joists straight onto the blocks, or should I do a course of Concrete Blocks for them to sit on?
2 - I am going to 'Double up' on the 3 middle joists, just in case I ever decide to partition off the room above. If I double up the joists, do I use a wider hanger at the ledger board and fit 2 joists into it, or do I use a hanger for each, and just fit them as close together as possible ?
Cheers
Gary
I am close to fitting the first floor joists in my extension, and the BCO has suggested a Ledger board & Hangers to attach to the existing gable end wall, and then to build the other ends into the new wall.
I have 2 questions;
1 - The inner skin of the new wall is made of light weight Aerated blocks (3.6Kn), and the joists are going to be 220x38. Is it OK to sit the joists straight onto the blocks, or should I do a course of Concrete Blocks for them to sit on?
2 - I am going to 'Double up' on the 3 middle joists, just in case I ever decide to partition off the room above. If I double up the joists, do I use a wider hanger at the ledger board and fit 2 joists into it, or do I use a hanger for each, and just fit them as close together as possible ?
Cheers
Gary