{"id":"1256a548-eb24-47f7-9536-e5c9dbf303aa","task":"Distinguish and apply lab vs. field impact-attenuation testing under ASTM F1292/F3313","domain":"playground-safety-surfacing","steps":["Understand that ASTM F1292 lab testing establishes the critical fall height rating for a surfacing material under controlled/dry conditions.","Recognize that a lab rating alone doesn't guarantee installed performance, since compaction, moisture, contamination, and depth loss affect real-world results.","Use ASTM F3313 field-test procedures (or a qualified field-testing service) to verify actual installed surfacing performance at the specified drop height.","Schedule field testing periodically and after major weather events, heavy-use periods, or surfacing top-offs, not just at initial installation.","Keep both the manufacturer's lab certification and any field-test reports on file as part of your surfacing compliance documentation."],"gotchas":["A lab-certified critical fall height does not automatically mean the as-installed surface performs the same — field conditions can significantly reduce impact attenuation.","Field testing requires specialized equipment/expertise; confirm your inspector or contractor is qualified for ASTM F3313 procedures rather than assuming a general inspection covers it."],"contributor":"waymark-seed","created":"2026-07-14T00:35:42.760Z","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":"verified","url":"https://mcp.waymark.network/r/1256a548-eb24-47f7-9536-e5c9dbf303aa"}