Wilson Class I Type A Permeable
Wilson Class 1 Type A Permeable is a clean, washed, crushed granite. The product meets Cal Trans Section 68-1 for permeable products. The aggregate is approximately 3/8" and is typically specified for uses such as behind retaining walls and in drainage situations using filter fabrics. Call your Graniterock sales representative for more info on specifications. This rock is typically gray in color.
ASTM Properties
| Specific Gravity | 2.78 |
| Unit Weight | 93.6 lb / pcf |
Sieve Analysis
| Inches | MM/UM | Grading* | Caltrans Section 37 |
|---|---|---|---|
| 3/4" | 19 mm | 100 | 100 |
| 1/2" | 12.5 mm | 100 | 95 - 100 |
| 3/8" | 9.5 mm | 99 | 70 - 70 |
| 1/4" | 6.3 mm | 52 | -- |
| #4 | 4.75 mm | 11 | 0 - 55 |
| #8 | 2.36 mm | 2 | 0 - 10 |
| #16 | 1.18 mm | 1 | -- |
| #200 | 75 um | <1 | 0 - 3 |
*Grading results are typical
Branch Availability
-
- A.R. Wilson Quarry
- 1900 Quarry Road
- Aromas, CA 95004
- 831.768.2380
Wilson Class I Type A Permeable
