Walls, buried structures, bearings & other structural elements

Find design requirements and guidance for ancillary structures and appurtenances.

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 8 - Walls and Buried Structures (PDF 3.0MB) provides design guidance for retaining walls, noise barrier walls and buried structures.

Chapter 9 - Bearings and Expansion Joints (PDF 1.5MB) provides design guidance for small, medium and large movement expansion joints, standard bearings and seismic isolation bearings.

Chapter 10 - Sign, Barrier, Approach Slabs, and Utilities (PDF 8.6MB) provides design guidance for structural appurtenances and topics including:

  • Sign and luminaire supports
  • Traffic barriers, railings, and barrier rehabilitation
  • Approach slabs
  • Utility installation son new and existing structures
  • Anchorage of permanent attachments
  • Drainage design
  • Bridge security
  • Temporary bridges

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.