I can't answer the for USA but I assume it would be similar to us. We are required to check the equipment for safety every single day. We have a check list as to what to look for and it must be signed off before a class arrives for the day. We do this as we set up.
Coaches will usually also check equipment every time they use it. As yiu go to a piece of a equipment you set up drills, adjust heights and place mats and while you do this you are always checking equipment.