This is the second one of these I've gotten..on the front (door) and rear covers...the frame (pipe) is supposed to slide through an opening...much like a curtain on a curtain rod...on both of mine...the opening was sewn too small and the pipe would not fit through..so I couldn't complete assembly...On the first one I had to fight with them twice to try and get replacements sent out...which they agreed to do....but both times the "warehouse" refused to send out the replacement parts...saying I must be assembling it wrong!!....Returning shed #2 today...I've been patient but that's it...will not try another one!...Clean up your act!!!