🌧️ IPC Table 1106 Storm Drainage, Vertical Leader Diameter & Overflow Scuppers

Commercial Roof Drain Leader & Scupper Calculator

Size vertical roof drain leader pipes, horizontal building storm sewers, and emergency overflow wall scuppers under International Plumbing Code (IPC Table 1106) based on roof square footage and local 100-year hourly rainfall rates.

1. Project & Operating Inputs

Total Flat Roof Catchment Area (Square Feet)

100-Year Hourly Rainfall Rate (Inches / Hour)

Customer Bid Price for Cast Iron Roof Drains & Pipe ($)

Cast Iron Drains, Heavy Duty Hangers & Labor Cost ($)

2. Financial Breakdown & Yield

IPC ROOF DRAIN LEADER & SCUPPERS

Turnkey Job Gross Profit

Plumbing Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost