+
/|
+ ________________/ o
|/ |
+----+----+ +--o-+-o--+
| | | |
+----+----+ +--o-+-o--+
| |
+ +--o-+-o--+
/ |
+----+ x +
| | |/
+----+ +
/
Main Section 1
+
/|
+ ________________/ o
|/ |
+----+----+ +--o-+-o--+
| | | |
+----+----+ +--o-+-o--+
| |
+ +--o-+-o--+
/ |
+----+ x +
| | |/
+----+ +
/
Main Section 1