According to the latest national standards, those with friction coefficient lower than 0.5 belong to the low degree of safety and anti-skid. 0.5-0.6 is medium, 0.6-0.7 is medium and high, and above 0.7 is high security. If the gathering place wants to win, improve the safety and anti-skid level.

Therefore, the safety anti-skid grade of commercial places should be middle and high grade, that is, 0.6-0.7.

I hope the answer will help you.