If you are referring to the OSHA Training institute Courses, the 500 Trainer Course in OSHA standards is for the construction industry. The course is designed for individuals in the private sector interested in teaching the 10 and 30 hour construction safety and health outreach program. to their employees and others interested groups. Course participants are briefed on effective instructional approaches and the effective use of visual aids and handouts. The course allows participants to become a trainer in the Outreach Program. If this is what your question is referring to you can contact me and I can supply you with more information.