It is crucial that a trigger does not encroach on another trigger. But most importantly when laying any object on a floor, be it table, bed, chair, sofa anything the green chassis must
NOT protrude through the floor. Doing so would create a weakness in the floor probably in a different and unconnected area of the floor.
NOTE: My nick and image are from a company. That company allows people to use them both as long as they get permission and a licence. I have that and a certificate to prove it.
"These are not the Druids you are looking for..."