We are supposed to be sourcing the supplies for our builder. Our plans call for padstones in non-standard sizes. It reads....
R1: 225 x 225 x 100h mm padstone
(minimum padstone height if unreinforced: 86 mm)
Factored reaction = 53.52 x 1.50 = 80.28 kN
Masonry: 50N/mm2 brick, class (iv)...