Guidance for loading conditions and load rating of bridge structures.
Design memorandum
Design memorandum are issued as interim updates to the Bridge Design Manual. Active design memorandums supersede the Bridge Design Manual contents and are currently enforced.
Related manual chapters
Chapter 3 - Loads (PDF 906KB) provides guidance for bridge loading conditions, limit states, and load factors.
Chapter 13 - Load Rating (PDF 1.9MB) provides criteria and guidance for loading rating bridges.
Bridge Design Manual
Complete Bridge design guidance is found in the Bridge Design Manual (M 23-50).