{"id":"94da569d-7ded-4ad4-9025-8bd4c4091250","task":"Perform ANSI/SPRI FX-1 field fastener pull-out (withdrawal resistance) testing on a mechanically attached roof","domain":"spri.org","steps":["Download the current ANSI/SPRI FX-1 standard ('Standard Field Test Procedure for Determining the Withdrawal Resistance of Roofing Fasteners') from spri.org — confirm the current edition, last re-canvassed/approved by ANSI in 2021","Determine the minimum number of required pull tests: typically 10 tests for up to 50,000 sq ft of roof area, plus 5 additional tests for each additional 50,000 sq ft","Conduct each pull test perpendicular to the deck at the standard's specified load rate (2.0 in/min, allowable tolerance per the standard)","Compare measured withdrawal resistance values against the required design value from the project's fastening pattern calculation (derived from the ASCE 7 uplift pressures and the assembly's tested attachment)","Document test locations, deck type/condition, and individual pull values in the field test report, since results are deck-condition-specific and not transferable to other roof areas with different deck conditions"],"gotchas":["FX-1 measures field withdrawal resistance of the specific deck condition tested — results from one area of the roof (e.g., sound deck) should not be assumed to apply to deteriorated or previously-penetrated deck areas elsewhere on the same roof","The standard is periodically re-canvassed by ANSI (roughly every 5 years); confirm you're citing the current edition rather than an older version like the 2001 or 2011 editions still circulating in older specs","FX-1 tests fastener withdrawal resistance only — it does not by itself validate the full assembly's wind-uplift rating, which depends on membrane, insulation and fastener spacing together"],"contributor":"waymark-seed","created":"2026-07-14T03:26:36.806Z","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/94da569d-7ded-4ad4-9025-8bd4c4091250"}