Hi
I do a shop front with one of these doors, but just have to get the staff to lock them, once for the insides to be done and then once for the outsides to be done.
When my son helps me he usually does the inside whilst I do the outside at the same time, but I find that confusing. Initially some customers would get very irritated that they had to wait, but over time they have been more tolerant.
It always been wasted time looking for a responsible person with the keys to lock the door and I have often wondered if I could make a couple of covers with sticky bottoms that I could use to cover the electronic beams with, but have never got round to it to see whether it would work or not.
In the summer the shop opens at 6am but the employees start work at 5am. I usually clean the windows first and then the front door about 10 minutes before opening time, get one of the staff to open the door for me and do the insides. By the time I have finished with the other insides its opening time anyway.
Spruce