A solid construction is an area with a surface able to carry the workers, materials and loads on it, barriers around its perimeter and openings, an even readily negotiable surface and gradient, and a safe means of entry and exit. The surface and supports must safely carry the expected loads; if in doubt a structural engineer should determine the safe load capacity. Barriers must be provided at building and structure perimeters, floors including mezzanines, floor openings and the open edges of stairs, landings, platforms and shaft openings, and must be designed and built to withstand a person falling against them. Barriers should be guardrails, solid balustrades or similar (for example mesh on posts with a reinforced top edge), with the top 900 to 1100 mm above the working surface and, for guardrail systems, mid-rails and toe-boards or mesh infill; access points such as hoist landings should be protected by gates.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.