Superstructure design

Find design information for bridge superstructures, including reinforced and prestressed cast-in-place concrete, reinforced and prestressed precast concrete and steel plate and box girder bridges.

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.

  • There are currently no design memorandums related to this topic

Related manual chapters

Chapter 5 - Concrete Structures (PDF 18MB) provides design guidance for reinforced and prestressed concrete including cast-in-place and precast elements. Concrete elements discussed include bridge decks, pier caps, reinforced concrete box girders, post-tensioned box girders, pretensioned girders and spliced girders.

Chapter 6 - Steel Structures (PDF 2.2MB) provides design guidance and plan details for steel superstructures. Shop plan review, painting and corrosion of steel foundations and buried structures is also discussed.

Bridge Design Manual 

Complete Bridge design guidance is found in the Bridge Design Manual (M 23-50).

See all manuals and standards

Traction tires are a special type of tire

manufactured with at least 1/8 of an inch tread. Traction tires are usually marked with a mountain/snowflake symbol, the letters M+S or “All Season.”

Carry chains, practice before leaving

Requiring chains keeps traffic moving during storms rather than closing a pass or roadway.

Prep your car. Fill up your gas tank,

pack jumper cables, ice scraper, warm clothing, snacks and water.