FHWA FP-24
Section 704 — Soil
FP-24 · Division 700 — Material. Full current text with cross-references on BuildSpec.
Section 704. — SOIL 704.01 Soil and Soil-aggregate M aterials. Provide suitable materials conforming to Table 704-1. Table 704-1 Soil Gradation and Classification Requirements Gradation and Classification Requirements Material Designation Foundation Fill Bedding Material Common Backfill RSS Backfill Plastic Pipe Backfill Structural Backfill Unclassified Borrow Maximum particle size , in 2 ½ 3 1½ 3 24 Soil classification , AASHTO M 145 A-1-a – A-1 A-2 A-3 A-1 A-2-4 A-2-5 A-3 – A-1 A-3 A-2-4 Material passing No. 200 sieve, AASHTO T 27 & T 11 6.0 maximum 10 maximum – – 5.0 maximum – Plasticity…
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