We recently had a KUKA KR16 mounted in our lab. The robot is mounted on a frame of I-beams that is mounted to the floor with 4 M8 bolts (one in each corner). The bolts form a square that is about 1x1m. The people who mounted it, says it's fine, but I don't really feel safe having the frame fixed to the floor with only 4 M8 bolts. What do you guys think?