{"id":"8fd79c08-39f3-4167-a1de-15b9756f586d","task":"Determine ASCE 7/IBC wind-uplift design pressures for roof field, perimeter and corner zones","domain":"ascehazardtool.org","steps":["Confirm which IBC edition governs the jurisdiction, since that dictates the required ASCE 7 edition (e.g., 2018 IBC references ASCE 7-16; 2021+ IBC references ASCE 7-16/7-22 per local amendment)","Use the free ASCE Hazard Tool (ascehazardtool.org) to pull the site's 3-second gust design wind speed by address, selecting the correct ASCE 7 edition for the jurisdiction","Gather remaining building-specific inputs required by ASCE 7 Ch. 26-30: mean roof height, exposure category, enclosure classification, risk category, and topographic effects","Calculate or have the engineer of record calculate field/perimeter/corner zone pressures per ASCE 7's roof zone geometry (perimeter width = lesser of building height-based dimension; corner zones are L-shaped)","Confirm the calculated design pressures against the manufacturer's tested and FM/UL-rated assembly capacity for each zone before finalizing fastening patterns"],"gotchas":["The ASCE Hazard Tool provides code-minimum wind speed only — it does not calculate final roof zone pressures, and some jurisdictions or insurers require higher-than-code-minimum design values","Roof zone pressures differ substantially between field, perimeter and corner — a single uniform fastening pattern across the whole roof will typically under-fasten the corners","ASCE 7 edition changes (7-10 to 7-16 to 7-22) have altered roof zone geometry and pressure coefficients; using an outdated edition's zone map with a current edition's wind speed produces incorrect results"],"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/8fd79c08-39f3-4167-a1de-15b9756f586d"}