[]
= "demo"
= "Textbook-generic structural demo equations"
= "test"
= "MIT OR Apache-2.0"
[[]]
= "fr"
= "ACI"
= "demo ยง1 (not ACI copyrighted text)"
= "psi"
= "7.5 * lambda * sqrt(fc)"
[[]]
= "fc"
= "psi"
= { = "2500 psi", = "10000 psi", = "error" }
[[]]
= "lambda"
= "1"
= "1.0"