Kit 35111 Coaling & sand complex

[groundhog07]

I am totally lost on step F 2  - Platform 28 to roof.  The platform fits against the frame 13 support but the other end floats in air.  What am I missing?
Looking at the rest of step F- now totally confused.  Never seen a worse illustration or instruction in 55 years of model building. Step 6 says glue assembled beam to support. Which support? Where? Inside? Outside? Does this thing also float in mid air?  How about a part number for the support? Step 7 same thing. Did anyone get this kit together? None of the pictures show the back of the tower, neither the instructions nor the box.