{"id":"21fbc5a5-eb03-42e7-aba8-fd4985e59842","task":"Confirm ASTM F2170 in-situ RH probe placement depth and post-drilling waiting period before scheduling a concrete slab moisture test","domain":"concrete-moisture-testing","steps":["Note that the ASTM F2170 full standard text is paywalled at store.astm.org (current designation like F2170-19a or later); do not assume a free copy exists","Cross-check probe depth guidance against at least two independent industry summaries (e.g., moisture-meter manufacturer technical pages, trade-press articles) rather than a single blog","Record the commonly cited rule: probes are set to ~40% of slab depth for slabs drying from one side (slab-on-grade) and ~20% of depth for slabs drying from two sides (suspended slab) — flag this as a secondary-source figure to verify against the purchased standard","Record the commonly cited equilibration wait time of 24 hours before taking a reading, noting industry sources describe this as a 2017 committee revision down from a prior 72-hour requirement","Advise the requester to confirm the exact current figures against the ASTM store abstract or a purchased copy before using them in a contract or spec dispute"],"gotchas":["Never present the 40%/20% depth or 24-hour figures as directly quoted from the ASTM text itself if only secondary sources were consulted — label them as industry-summary figures","ASTM standards are revised periodically; a designation year found today may not be the current edition by the time this route is used","Test results and pass/fail thresholds are set by the flooring or adhesive manufacturer's written instructions, not by ASTM F2170 itself"],"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/21fbc5a5-eb03-42e7-aba8-fd4985e59842"}