Hiya Folks
I'm planning on chasing a channel in a wall for cables for a 'lounge plate' e.g. TV, FM, SAT, network, phone.
I'd like to put these in in conduit, it will probably have to be 25mm round.
What is the maximum depth I can chase the wall out vertically?
I've read that the maximum vertical chase depth is 33%.
My house has three layers of bricks in the walls. Normal outside red bricks, a cavity wall with breeze block, then an internal cinder or clinker type block at 50mm wide with plaster on top(12-15mm).
Is chasing out this internal wall(leaf?) limited by the building regulations Part A 33% limit also?
If so does the limit include the finishing plaster?
e.g. 0.33 x 65mm = 21.5mm?
or 0.33 x 50mm = 16.5mm?
Or does the regulation not apply to this inner leaf of blocks and I can merrily chase a channel deep enough for 25mm conduit?
It is hard to tell if these internal cinder blocks are taking any load from above. I suspect not as in places there is plaster board between the cinder block and the joists. I think the entire load of the joists is taken by the middle row of breeze block where the joists sit on metal plates on top of the breeze blocks, not by the cinder block internal wall.
Here is a photo of the joist end. The cinder blocks are under the narrow strip of plaster board, so probably not load baring.
//www.diynot.com/diy/attachments/joistnotchresize-jpg.107292/
I'm planning on chasing a channel in a wall for cables for a 'lounge plate' e.g. TV, FM, SAT, network, phone.
I'd like to put these in in conduit, it will probably have to be 25mm round.
What is the maximum depth I can chase the wall out vertically?
I've read that the maximum vertical chase depth is 33%.
My house has three layers of bricks in the walls. Normal outside red bricks, a cavity wall with breeze block, then an internal cinder or clinker type block at 50mm wide with plaster on top(12-15mm).
Is chasing out this internal wall(leaf?) limited by the building regulations Part A 33% limit also?
If so does the limit include the finishing plaster?
e.g. 0.33 x 65mm = 21.5mm?
or 0.33 x 50mm = 16.5mm?
Or does the regulation not apply to this inner leaf of blocks and I can merrily chase a channel deep enough for 25mm conduit?
It is hard to tell if these internal cinder blocks are taking any load from above. I suspect not as in places there is plaster board between the cinder block and the joists. I think the entire load of the joists is taken by the middle row of breeze block where the joists sit on metal plates on top of the breeze blocks, not by the cinder block internal wall.
Here is a photo of the joist end. The cinder blocks are under the narrow strip of plaster board, so probably not load baring.
//www.diynot.com/diy/attachments/joistnotchresize-jpg.107292/