Here you go, Chris; your ShelterLogic greenhouse might well have some differences from what I have, but maybe this will give you some ideas about how you can do yours. There is also some good info about the door framing for a hoop house here: http://www.wyomingextension.or...
I hope this is helpful!
This is the entire frame when we first built it
The hip boards are fastened to the metal frame with pipe clamps
We used a separate board for each section between the hoops
The baseboards are also fastened to the frame with pipe clamps
Inside view of the end frame
A bracket fastens the wooden end frame to the top purlin, using the same bolt that holds the purlin to the hoop
The vertical and diagonal boards are outside the horizontal boards, but inside the baseboard
The baseboards are fastened together with "mending plates"
Wooden lath strips were used to fasten the plastic to the frame
The doors were made of 1x2's( sized to fit the opening) and then covered with the plastic film; hooks and eyes are used to hold them open,
Two of these brackets are attached to the top purlin, again using the same bolts that fasten the purlin to the hoops; the brackets are for attaching support posts in the winter