49 CFR § 230.25 - Maximum allowable stress on stays and braces.

---
identifier: "/us/cfr/t49/s230.25"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 230.25 - Maximum allowable stress on stays and braces."
title_number: 49
title_name: "Transportation"
section_number: "230.25"
section_name: "Maximum allowable stress on stays and braces."
chapter_name: "FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "230"
part_name: "STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 20103, 20107, 20702; 28 U.S.C. 2461 note; and 49 CFR 1.89."
regulatory_source: "64 FR 62865, Nov. 17, 1999, unless otherwise noted."
cfr_part: "230"
---


# 230.25 Maximum allowable stress on stays and braces.

The maximum allowable stress per square inch of net cross sectional area on fire box and combustion chamber stays shall be 7,500 psi. The maximum allowable stress per square inch of net cross sectional area on round, rectangular, or gusset braces shall be 9,000 psi.