Hi guys,
I'm not sure if Drop edge beam needed on the fill part of slab. According to this http://www.anewhouse.com.au/2013/07/drop-edge-beams/ it's needed on the fill part. But my builder included drop edge beam on the garage side and porch step down area and told me that DEB is not needed on the master bed side where there is fill area. Instead they asked me to put retaining wall on the master bed side. But according to north-west elevation there is fill area in that part of the slab which needs to be supported by Drop Edge Beam? Any suggestion would be appreciated.
I have attached here the plan.