Site / Grading / Stormwater · IBC 2021 §1803.5.3
Expansive Soil Test Criteria
Four test criteria for expansive soil: PI of 15 or more, over 10 percent passing No. 200, over 10 percent under 5 micrometers, expansion index over 20; Item 4 can replace Items 1 to 3.. Referenced to IBC 2021 §1803.5.3.
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