OSHA 10 vs. OSHA 30

Small contractors and construction workers often think or believe that OSHA 10 and OSHA 30 are two levels of the same certification. That leads to questions such as: Does every worker start with OSHA 10? Does a foreman legally need OSHA 30? Must someone complete OSHA 10 before taking OSHA 30? Does an OSHA 30…