Reader2580, there is a YouTube channel by the name of Dean Doherty.
The fella runs a tool repair business. He makes videos of all sorts of electric and air tools. Quite interesting to see the failure mode of various brands of tools.
Search it out and have a look. You might get some ideas on...
17W,
My best recommendation would be a phone call to the building inspector followed by a site visit. He can then advise based on building codes for your particular location.
Another consideration that might be asked of your engineering/architectural/contractor firms is the use of screw piles as part of your footer. Not sure what their availability is in your area or the costs associated with them. Something to think about!
I have the same sensors on my garage door. With items that get stored alongside the rails, they can sometimes knock the sensor out of alignment.
My goal is to built some protection around them. Maybe a 12 inch length of 8 inch pipe sliced vertically and then with a foot of some sort welded...