Masonry walls or sections may not be allowed to fall onto floors in masses that exceed the floors' safe carrying capacity. A wall section more than one story high may not stand alone without lateral bracing unless it was designed to be free-standing and is in a condition safe for self-support, and all walls must be left stable at the end of each shift. Nobody may work on top of a wall when weather makes it hazardous. Structural or load-supporting members on a floor may not be cut out or taken away until every story above has been demolished and removed, although floor beams may be cut for material disposal or equipment installation if 1926.853 and 1926.855 are followed. Floor openings within 10 feet of a wall being demolished must be planked solid unless employees are kept away from the area underneath. In skeleton-steel buildings the steel frame may stay during masonry demolition, but beams, girders and similar supports must be cleared of loose material as the masonry work moves down. Walkways or ladders must be provided so employees can get onto and off any wall or scaffold safely. Walls acting as retaining walls for earth or adjoining structures may not be demolished until the earth is braced or the adjoining structures underpinned, and walls intended to hold piled debris may be used that way only if they can safely carry the load.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.