Calculators, engineering docs & installation guides
Pipe Size Calculator
Enter acres drained and grade percentage. This calculates required flow (Q) at six standard drainage coefficients, then sizes both single-wall and dual-wall pipe using Manning's equation.
Rational drainage coefficient method (Q = 0.042 × DC × Acres) and Manning's equation, n = 0.024 single-wall / 0.012 dual-wall. Validate roughness coefficients and the commercial size list against Fratco's actual engineering specs before using this for a real installation.
Drainage Potential Calculator
Enter a pipe size, wall type, and grade percentage. This back-calculates full-flow capacity and the acres each drainage coefficient supports.
Same Manning's equation basis as the Pipe Size Calculator, solved in reverse for capacity.
Documentation Library
Engineering docs, installation guides, certifications, and DOT spec sheets. This is the same content the site AI assistant draws from.
This list is placeholder data (/js/docs-data.js). Once documents are ingested into Supabase with pgvector, this list and the search box query that table directly, and re-ingestion runs from the admin panel whenever a doc is added or updated.