{"id":"20836c0d-3795-43a2-8e06-8675a8dd6883","task":"Determine whether a San Francisco building project falls under Planning Code Section 139 bird-safe glazing standards and what glazing treatment satisfies it.","domain":"sfplanning.org / codelibrary.amlegal.com","steps":["Pull San Francisco Planning Code Section 139 'Standards for Bird-Safe Buildings' via the official amlegal.com code library mirror or sfplanning.org","Identify which of the two hazard types applies: location-related hazard (site within 300 feet of an Urban Bird Refuge) or feature-related hazard (free-standing glass walls, wind barriers, skywalks, balconies, or rooftop greenhouses with unbroken glazed segments 24 sq ft or larger)","Confirm applicability triggers: new construction, an addition that creates a bird hazard, or replacement of 50% or more of the glazing on an existing bird-hazard condition","Review acceptable Bird-Safe Glazing Treatments: fritting, netting, permanent stencils, frosted glass, exterior screens, physical grids, or UV patterns visible to birds, meeting the pattern-density spec (vertical elements ≥1/4 in. wide at ≤4 in. spacing, or horizontal elements ≥1/8 in. wide at ≤2 in. spacing)","Consult sfplanning.org's published Design Guide for Standards for Bird-Safe Buildings for illustrated compliance examples before finalizing a glazing product selection"],"gotchas":["San Francisco's triggers and thresholds (300-ft refuge radius, 24-sq-ft unbroken segment, 50% replacement threshold) are specific to this ordinance and differ from NYC LL15's height-based (75-ft) and percentage (10 sq ft/100 sq ft) framework — the two cities' rules are not interchangeable","The pattern-density spacing spec (1/4 in./4 in. or 1/8 in./2 in.) is a precise technical requirement; a fritted glass product must be verified against these exact dimensions, not just marketed generically as 'bird-friendly'"],"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/20836c0d-3795-43a2-8e06-8675a8dd6883"}