49 C.F.R. § 230.25 Maximum allowable stress on stays and braces.
Title 49 - Transportation
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.
Title 49: Transportation
PART 230—STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS
Subpart B—Boilers and Appurtenances
Allowable Stress
§ 230.25 Maximum allowable stress on stays and braces.
