DYWIDAG-Systems International (DSI) is a group of Companies operating worldwide under the ownership of Dyckerhoff & Widmann AG (DYWIDAG), one of the largest civil engineering and building contractors in Germany.

• See also:
• Masterformat 2004
• 03 38 00 - Post-Tensioned Concrete
• 13 31 00 - Fabric Structures
• 13 31 23 - Tensioned Fabric Structures
• 13 34 00 - Fabricated Engineered Structures
• 13 34 13 - Glazed Structures
• 13 34 16 - Grandstands and Bleachers
• 13 34 19 - Metal Building Systems
• 13 34 23 - Fabricated Structures
• 13 34 56 - Observatories
• 13 44 00 - Modular Mezzanines
• 31 25 00 - Erosion and Sedimentation Controls
• 31 25 13 - Erosion Controls
• 31 25 23 - Rock Barriers
• 31 25 53 - Sedimentation Controls
• 31 25 63 - Rock Basins
• 31 32 00 - Soil Stabilization
• 31 32 13 - Soil Mixing Stabilization
• 31 32 19 - Geosynthetic Soil Stabilization and Layer Separation
• 31 32 23 - Pressure Grouting Soil Stabilization
• 31 32 33 - Shotcrete Soil Slope Stabilization
• 31 35 19 - Geosynthetic Slope Protection
• 31 35 23 - Slope Protection with Slope Paving
• 31 36 00 - Gabions
• 31 37 00 - Riprap
• 31 70 00 - TUNNELING AND MINING
• 32 32 00 - Retaining Walls
• 32 32 13 - Cast-in-Place Concrete Retaining Walls
• 32 32 16 - Precast Concrete Retaining Walls
• 32 32 19 - Unit Masonry Retaining Walls
• 32 32 23 - Segmental Retaining Walls
• 32 32 29 - Timber Retaining Walls
• 35 31 00 - Shoreline Protection
• 35 31 16 - Seawalls
• 35 31 19 - Revetments
• 35 31 23 - Breakwaters
• 35 31 26 - Jetties
• 35 31 29 - Groins
• 35 42 00 - Waterway Bank Protection
• Masterformat 1995
• 02340 - Soil Stabilization
• 02370 - Erosion and Sedimentation Control
• 02390 - Shoreline Protection and Mooring Structure
• 02400 - Tunneling, Boring and Jacking
• 02830 - Retaining Walls
• 03380 - Post-Tensioned Concrete
• 13120 - Pre-Engineered Structures