Firstly, I’m sorry for late reply, last week I’m still business trip at Indonesia reference your design, the design was wrong an open frontage, must revise to 3 open frontage as the design is 4 open frontage. And the back wall must reduce to 3.5 m(H). as the design is 4 m(H). if you need to build the structure higher than 3.5m(H) must be set back from neighboring stand 1m. and I also attached regulation fitting, your stand area as attached.