1200/150=8 courses
At which point us considered acceptable to decrease thickness?
4x215 thick = 860 max height
860/150=5.7 courses
So therefore would 5 courses at 215 and 3 at 440 be suffice?
Im looking to build a 11.2m long x 1.2m high retaining wall.
Of which the top 700 is soil and 500 limestone
Does this sound about right?
Recommended from a 'skilled friend'
6inch/140mm 7n dence block
10mm mortar
8 courses all laid flat
6 courses 440 deep
2 courses 215 deep
Pillars 2 meters...