Dunstan
A contractor asked me to design a hanger Post Tension slab for a plane hanger of dimension 29.2m(approx.95.8ft)x 32.4m(approx. 106.3ft). I proposed a 150mm (6") thick slab with twin 1/2" mono-strands 270k at 0.85m (33.5") c/c, both ways.
I now have a request to allow for two drains with...