Select and document a UL-listed through-penetration firestop system using UL Product iQ and its system-numbering scheme
domain: ul.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
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.
Known 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.
Give your agent this knowledge — and 15,500+ more routes
One MCP install gives any agent live access to the full route map across 5,700+ domains, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp
Need this verified for your stack — or a route we don't have yet?