[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR230.25]

[Page 327]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 230--STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table of Contents
 
                  Subpart B--Boilers and Appurtenances
 
Sec. 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.

                          Strength of Materials