This chapter covers foundations for refinery equipment@ for mechanical equipment@ and for various structures (including building structures); structures for supporting and giving access to refinery equipment; and building. It also covers ladders@ stairways@ walkways@ and platforms. This chapter is not intended to encompass requirements imposed by such regulatory agencies as OSHA*.Structural details pictured ordescribed herein may not be in full accordance with such requirements. * Occupational Safety and Health Administration@ 200 Constitution Avenue@ Washington@ D.C. 20210.