Based on that floor plan, the Distance from the Freight Elevator to the Stairwell is LESS than 20 FEET. Generally speaking, You could Spit from the Freight Elevator to the Stairwell. No Way!
Based on all the controversy about Lovelady and plaid shirt and the resemblance with White. He was not on duty that day and the logical move was that from Dealey Plaza, he went to DPD to check if he can help out somehow. He was waiting in 327 office when Oswald brought in at 2PM and I believe he was sent to check Oswald rooming house which would explain how he had one of the BY photos.
I watched a film of the rifle being found on Youtube and in it was a shot from inside the elevator looking out. Not only did this help me further understand where the stairwell was and the orientation of the photographs it also showed the floor in front of it to be quite clear as in the photograph .
I have seen the Alyea Footage of Lt Day allegedly pulling the rifle from its' hiding slot for the very 1st time. That Alyea footage is Not filmed from the "elevator looking out".
Open space in front of elevator---------we see UP stairwell and the sign for the DOWN stairwell Incidentally, this area is where Mr Jack Dougherty said he was standing in when he heard a loud bang.