2102A Notations — 2025 California Building Code
California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Building Code (Title 24, Part 2) § 2102A · Effective January 1, 2026 · Official source: Building Standards Commission
2102 A .1 General. The following notations are used in the chapter:
NOTATIONS .
d b = Diameter of reinforcement, inches (mm).
F s = Allowable tensile or compressive stress in reinforcement, psi (MPa).
f r = Modulus of rupture, psi (MPa).
f s = Computed stress in reinforcement due to design loads, psi (MPa).
L s = Distance between supports, inches (mm).
l d = Required development length or lap length of reinforcement, inches (mm).
P = The applied load at failure, pounds (N).
S t = Thickness of the test specimen measured parallel to the direction of load, inches (mm).
S w = Width of the test specimen measured parallel to the loading cylinder, inches (mm).
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