Hello, in light of the picture that provides according to you, do before should the brick of 800, range estimation width should be controlled in 4 meters, high estimation is between 2500-2600
The foundation is current and in light of popular trend of future, big board it is a right choice, 900*1800, or 900*2650, 1200*2400 is OK, norms is bigger, juncture is little, the most important is to be able to be accomplished OK also and Lian Wen, custom-built into design, compare traditional standards brick nevertheless for, big board cost is relative taller, and carry, installation should be bothered a few.
