{"id":"9e1a3d7b-7e86-4594-beef-ddc65c74351b","task":"Select and document a UL-listed through-penetration firestop system using UL Product iQ and its system-numbering scheme","domain":"ul.com","steps":["Access UL Product iQ and search the through-penetration firestop system category using the relevant construction and penetrant parameters.","Understand the numbering convention: leading letters denote the penetrated construction type (e.g., C for floor-or-wall, F for floor-only, W for wall-only), followed by characters describing substrate and penetrant category.","Match the actual field condition — floor/wall thickness and type, penetrant material, and annular space — to a listed system's tested parameters without extrapolating beyond what was tested.","Note that some system-number series have migrated from 4-digit to 5-digit numbering as available numbers run out, so don't assume older charts are exhaustive.","Pull the full system documentation, including its F/T/L/W ratings, for the submittal package rather than citing the system number alone."],"gotchas":["UL Solutions has been transitioning some firestop system-number series from 4-digit to 5-digit formats as available numbers are exhausted — older reference charts may not reflect current numbering.","A system found in Product iQ is only valid if the field condition matches the tested parameters exactly; an approximate match calls for an engineering judgment, not a stretched interpretation of the listing.","Product iQ's search interface and categorization are updated periodically — confirm current navigation on ul.com rather than an older screenshot-based guide."],"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/9e1a3d7b-7e86-4594-beef-ddc65c74351b"}