Block wall core fill problem.
Hi all,
Im building a 2.6m block retaining wall soon & will have a builder mate do the concreting but i have to
organise the digging, steel etc ready for the concrete.
Im a sparky so im fairly new to this.
I have engineering drawings done although hand drawn so i have a couple of questions.
1800mm high is the max i can go with 200mm blocks so i have to use 300mm blocks 4 blocks high (courses?)
The problem i face is when i core fill it the concrete will spill out the rear 100mm of the uncovered
300mm block.
Someone suggested i core fill the 300mm blocks first before the brickie starts laying the 200mm blocks
on top but to me this sounds like the wall won't be as strong as there is a join between the upper &
lower core fills. If this is correct the 200mm blocks will only be strengthened by the vertical reo
@400. Is this ok ?
Or i thought i could have the brickie cover the open section behind the wall with flat blocks & core
fill the whole wall at the same time.....to me this will be stronger.
Also what does B/U & B/O mean when written after say N16@400 ?
http://img.photobucket.com/albums/v298/Kev80/Wall.jpg
Cheers.