🧱 ASCE 68-18 (ASTM No. 57 Choking & No. 2 Open-Graded Reservoir Aggregate Base)

Permeable Interlocking Concrete Pavement Calculator

Size Permeable Interlocking Concrete Pavements (PICP / Belgard / Unilock) and open-graded stone subbase reservoirs under ASCE Standard 68-18: calculate ASTM No. 2 subbase reservoir depth (Inches @ 40% stone void space) storing the design 100-year storm volume, calculate structural traffic load capacity, and permeable paving contracting yields.

1. Project & Operating Inputs

Permeable Parking Area (Square Feet e.g. 25,000 Sq Ft Commercial Lot)

Design Storm Infiltration Depth (Inches e.g. 3.2" 24-Hour Design Storm)

Customer Bid Price for Supplied & Laid PICP System ($ / Sq Ft)

Permeable Pavers, ASTM No. 8 Joint Stone, No. 57 Choke, No. 2 Base ($ / Ft)

2. Financial Breakdown & Yield

ASCE 68-18 PERMEABLE PICP

Turnkey Permeable Pavement Contract Profit

Hardscape & Civil Engineering Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost