Compaction Pedestal (Fig. 3 ASTM D5581):
- Wooden Post: 8" × 8" × 18" (203.2 × 203.2 × 457.2 mm), made of oak, pine, or equivalent wood.
- Density: 42–48 lb/ft³ (0.67–0.77 g/cm³).
- Steel Cap Plate: 12 × 12 × 1"(304.8 × 304.8 × 25.4 mm).
- Mounting: To be Fixed to a level concrete slab with four steel angle brackets.
- Purpose: To absorb impact during specimen compaction while maintaining mold alignment.