I have started building a straight buttress. Its dimensions are:
- Wide, along/facing the wall: 4 bricks, 4 x 102.5 = 410cm
- Long, across/away of the wall: 3 bricks, 3 x 215 = 645cm
With the mortar comes to 415 cm wide x 650 cm long.
Do you think it is strong enough?
Or else...