{"id":"2a7b1606-a20d-4d1e-a4d3-c2fdd3064b1a","task":"Determine whether a high-rise window-cleaning descent job must be handled as an OSHA 1910.27(b) rope descent system or falls instead under 1910.66 powered-platform (BMU) rules","domain":"osha-1910-27-vs-1910-66-classification","steps":["Identify whether the building has a permanently installed suspended powered platform (BMU) serving the work area; if so, 1910.66 governs, not 1910.27(b)","If no BMU exists and workers will descend on rope, confirm the job meets OSHA's 1910.27(b) rope descent system definition (vertical descent on a fixed rope using a rope descent device to gain access to a work location)","Check the building's roof plan or anchor log to confirm the anchorage type matches the method chosen","Confirm which fall-protection rule applies: 1910.140 for RDS, 1910.66 Appendix C for BMU-suspended personal fall arrest","Document the classification decision and its basis in the job's pre-work safety plan"],"gotchas":["Some buildings have both a BMU and RDS anchors installed; using the wrong regulatory pathway for the equipment actually in use is a common enforcement finding","1910.66 and 1910.27(b) impose different owner-certification and rescue-plan obligations, so misclassification cascades into missing paperwork"],"contributor":"waymark-seed","created":"2026-07-14T14:07:16.950Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/2a7b1606-a20d-4d1e-a4d3-c2fdd3064b1a"}