4148Drain Tiles

IA · 2023 Standard Specifications✓ Full text on BuildSpecBook pages 1118–1118 Save this section

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4148.01GENERAL REQUIREMENTS

Meet the requirements of AASHTO M 178, standard quality, extra quality, or special quality, as specified, or AASHTO M 179, standard, extra quality, or heavy duty, as specified. When the quality is not specified, use extra quality tile in roadway embankments, and use standard or standard quality tile in other locations.

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4143Subdrain Pipe

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Source: Iowa Standard Specifications for Highway and Bridge Construction, 2023 Edition. Pages 1118–1118 of 1,288. View official source ↗

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Scoped to Iowa Standard Specifications for Highway and Bridge Construction, Section 4148 — Drain Tiles. Every answer cites the section it came from, with a verification date — don’t trust a percentage, click the citation.