Procedures and Standards

C. Structural Timber:

"National Design Specifications for Stress-Grade Lumber and its
Fastenings 1944," Recommended by National Lumber Manufacturers
Association, Washington, D. C.

D. Masonry:

"American Standard Building Code Requirements for Masonry,'
Miscellaneous Publication M174 of the National Bureau of Standards,
United States Department of Commerce.

E. Highway Bridges:

"Standard Specifications for Highway Bridges," The American Association of State Highway Officials.

F. Railroad Bridges:

"Specifications for Steel Railway Bridges," American Railway Engineering Association (latest edition).

If, in the course of work, exception is taken to any of the provisions of either
of the specifications, or codes listed above, such exception should be taken
up with the Chief Engineer for a ruling which will be made known to all design
heads so that uniformity in design may be attained.