Important Notice
In the effort to update the Standard Construction Details and Standard Specifications per the 2021 review, all detail sheets have been reviewed and sheet changes have been noted with new title block and signatures. Major efforts of this update include removal of the metric values so that the U.S. customary units will be the only unit of measure, addition of 2016 MASH compliance as accepted by the Department, consistency with the 2021 DelDOT Standard Specifications, consistency with Department and regulatory publications, and edits of the Details were made to meet the current methods of construction.
2021
Standards
Standards
- DelDOT 2021 Standard Details (2.22 MB) - edited: 12/27/2021
- DelDOT 2021 Standard Details Revision Sheets (14.1 MB) - edited:12/01/2021
- 2021 Index Sheets
- Memo to Current Holders - List of Changes for 2021
Section I - Barrier
Section I - BarrierNote: Click icon 
for MicroStation DGN file format
- B-L (2021) - Barrier Legend
- B-1 - Guardrail Applications (Types 1-31, 2-31, and 3-31)
- B-1 (2020) - 1 - Plan Views
- B-1 (2020) - 2 - Elevation Views and Splice Details
- B-1 (2021) - 3 - Section Views
- B-1 (2020) - 4 - Type 1-31, Guardrail with Omitted Post
- B-1 (2020) - 5 - Type 1-31, Guardrail Steep Slope
- B-1 (2020) - 1 - Plan Views
- B-2 - Grading for Guardrail End Treatments (Types 1, 2, and 3)
- B-2 (2021) - 1 - Grading For Guardrail End Treatment Attenuator, Type 1
- B-2 (2021) - 2 - Grading For Guardrail End Treatment Attenuator, Type 2
- B-2 (2020) - 3 - Grading
For Guardrail End Treatment Attenuator, Type
3
- B-2 (2021) - 1 - Grading For Guardrail End Treatment Attenuator, Type 1
- B-3 - Guardrail Over Culverts (Types 1-31, 2-31, and 3-31)
- B-3 (2021) - 1 -
Guardrail Over Culverts, Type 1-31
- B-3 (2020) - 2 -
Guardrail Over Culverts, Type 2-31
- B-3 (2020) - 3 -
Guardrail Over Culverts, Type 3-31
- B-3 (2021) - 1 -
Guardrail Over Culverts, Type 1-31
- B-4 (2021) - 1 - End Anchorage, Type 1-31 - edited: 09/21/2020
- B-5 - RESERVED
- B-6 - RESERVED
- B-7 (2020) - W-Beam, Type
1-27 to Type 1-31 Transition
Section
- B-8 - Guardrail to Barrier Connection - Approach and Exit Type 1-31
- B-8 (2020) - 1 -
Approach Type
1-31
- B-8 (2020) - 2 -
Type 1
Hardware
- B-8 (2020) - 3 -
Bent Plate Rub
Rail
- B-8 (2020) - 4 -
Exit Type
1-31
- B-8 (2020) - 1 -
Approach Type
1-31
- B-9 - RESERVED
- B-10 - Guardrail to Barrier Connection - Type 3-31
- B-10 (2020) - 1 -
Approach, Type
3-31
- edited: 12/27/2021/
- B-10 (2020) - 2 -
Post
- B-10 (2020) - 3 -
Post and Offset
Block
- B-10 (2020) - 4 -
Terminal End Shoe and Connection
- B-10 (2020) - 1 -
Approach, Type
3-31
- B-11 - Thrie-Beam Approach Guardrail Transition (AGT) To Connection Buttress
- B-11 (2021) - 1 -
Thrie-Beam AGT to Connection Buttress -
Elevation and Plan
Views
- B-11 (2021) - 2 -
Thrie-Beam AGT to Connection Buttress -
Plan, Elevation, and Reinforcement
Views
- B-11 (2020) - 3 -
36 F-Shape
Transition
- B-11 (2020) - 4 -
36 F-Shape Transition Reinforcement
- B-11 (2020) - 5 -
42 F-Shape
Transition
- B-11 (2021) - 6 -
42 F-Shape Transition Reinforcement
- B-11 (2020) - 7 -
42 Single Slope
Transition
- B-11 (2020) - 8 -
42 Single Slope Transition
Reinforcement
- B-11 (2021) - 1 -
Thrie-Beam AGT to Connection Buttress -
Elevation and Plan
Views
- B-12 - RESERVED
- B-13 - Hardware
- B-13 (2020) - 1 -
W-Beam Section and Elevation Views
- B-13 (2020) - 2 -
W-Beam Steel Post and Offset Block
- B-13 (2020) - 3 -
W-Beam Terminal
Connector
- B-13 (2020) - 4 -
Thrie Beam and Thrie Beam Expansion
Section and
Elevation
- B-13 (2020) - 5 -
Thrie Beam Steel Post and Offset Block
- B-13 (2020) - 6 -
Asymmetric and Symmetric W-Beam to Thrie
Beam Transition
Section
- B-13 (2020) - 7 -
Wood Offset Blocks, Soil Plate, Steel Tube
and Wood Breakaway
Posts
- B-13 (2020) - 8 -
End Anchorage
Hardware
- B-13 (2020) - 9 -
Reflector and W-Beam Bearing Plate
- B-13 (2021) - 10 -
Guardrail Mounted
Rail
- B-13 (2020) - 11 -
Downstream Anchorage System - Ground
Strut & Anchor
Bracket
- B-13 (2020) - 12 -
Guardrail to Barrier Connection -
Thrie-Beam Terminal
Connector
- B-13 (2020) - 1 -
W-Beam Section and Elevation Views
- B-14 - RESERVED
- B-15 - Guardrail Applications (Types 1-27, 2-27, and 3-27)
- B-15 (2020) - 1 -
Plan
Views
- B-15 (2020) - 2 -
Elevation Views and Splice Details
- B-15 (2020) - 3 -
Section
Views
- B-15 (2020) - 1 -
Plan
Views
- B-16 - RESERVED
- B-17 (2021) - Guardrail End Treatment, Type 4-27
- B-18 (2021) - Curved Guardrail Section, Type 1-27
- B-19 - RESERVED
- B-20 - Burried In Back Slope End Terminal, Type 1-31
- B-20 (2021) - 1 - Perspective and Elevation Views
- B-20 (2021) - 2 - Section Views
- B-20 (2021) - 3 - Hardware
- B-20 (2021) - 4 - Posts
- B-20 (2021) - 1 - Perspective and Elevation Views
- B-21 - RESERVED
- B-22 - RESERVED
- B-23 - RESERVED
- B-24 - RESERVED
- B-25 - Concrete Roadside Barrier, 36"
- B-25 (2021) - 1 - Typical Sections Type 1, Type 2, and Type 3
- B-25 (2021) - 2 - Elevation and Reinforcement
- B-25 (2021) - 1 - Typical Sections Type 1, Type 2, and Type 3
- B-26 - Concrete Roadside Barrier, 42"
- B-26 (2021) - 1 - Typical Sections Type 1, Type 2, and Type 3
- B-26 (2021) - 2 - Elevation and Reinforcement
- B-26 (2021) - 1 - Typical Sections Type 1, Type 2, and Type 3
- B-27 (2021) - Elevation and Reinforcement 32 F - Shape
- B-28 (2021) - Elevation and Reinforcement 36 F - Shape
- B-29 (2021) - Elevation and Reinforcement 42 F - Shape
- B-30 (2021) - Elevation and Reinforcement 42 Single Slope
Section II - Curb & Gutter
Note: Click icon for MicroStation DGN file format
- C-1 - PCC Curb
- C-1 (2021) - 1 - PCC Curb
- C-1 (2021) - 2 - Integral PCC Curb & Gutter
- C-1 (2021) - 3 - Integral PCC Curb & Gutter (For Use At Pedestrian Connections Only)
- C-1 (2020) - 4 - PCC
Roundabout and Guardrail Median
Curb
- C-1 (2021) - 1 - PCC Curb
- C-2 - Pedestrian Connection
- C-2 (2021) - 1 - C-2 (2021) - 1- General Notes
- C-2 (2021) - 2 - C-2 (2021) -2-Type 1
- C-2 (2020) - 3 - C-2 (2021) - 3 Type 1
- C-2 (2021) - 4 - C-2 (2021) - 4 Type 2
- C-2 (2021) - 5 - C-2 (2021) - 5 Type 3
- C-2 (2021) - 6 - C-2 (2021) - 6 Type 4
- C-2 (2021) - 7 - C-2 (2021) - 7 Type 5 and DWS placement
- C-2 (2021) - 1 - C-2 (2021) - 1- General Notes
- C-3 (2021) - Entrances
- C-4 (2020) - Curb
Opening
- C-5 (2021) - Curb Sidewalk Opening
- C-6 (2017) - Curb Retaining Wall
Section III - Drainage
Note: Click icon for MicroStation DGN file format
- D-1 - 6:1 Safety End Structure
- D-1 (2018) - 1 - Detail Views
- D-1 (2018) - 2 - Schedules
- D-1 (2018) - 1 - Detail Views
- D-2 - 10:1 Safety End Structure
- D-2 (2018) - 1 -
Detail
Views
- D-2 (2018) - 2 -
Schedules
- D-2 (2018) - 1 -
Detail
Views
- D-3 - Safety Grates
- D-3 (2020) - 1 -
Safety End Structure Grate and Assembly
- D-3 (2020) - 2 -
Personnel Safety Grate For Pipe Inlet
- D-3 (2020) - 1 -
Safety End Structure Grate and Assembly
- D-R (2020) - Drainage
Inlet Reference
Sheet
- D-4 (2020) - Inlet
Box
- D-5 - Drainage Inlet Details
- D-5 (2020) - 1 -
Drainage Inlet
Assembly
- D-5 (2020) - 2 -
Drainage Inlet Frame and
Grates
- D-5 (2020) - 3 -
Drainage Inlet top
Units
- D-5 (2020) - 4 -
Drainage Inlet Cover
Slab
- D-5 (2020) - 5 -
Double Inlet Cover
Slab
- D-5 (2020) - 6 -
34" X 24" Drainage
Inlet
- D-5 (2020) - 7 -
34" X 18" Drainage
Inlet
- D-5 (2020) - 8 -
Drainage Inlet top Unit, Type S
- D-5 (2020) - 9 -
Doghouse Inlet
Box
- D-5 (2020) - 1 -
Drainage Inlet
Assembly
- D-6 - Manhole Details
- D-6 (2020) - 1 -
Box Manhole
Assembly
- D-6 (2020) - 2 -
Round Manhole
Assembly
- D-6 (2020) - 3 -
Manhole Grade Ring, top Unit, Frame and
Cover
- D-6 (2020) - 4 -
Box Manhole Cover
Slab
- D-6 (2020) - 5 -
Round Manhole Cover
Slab <
- D-6 (2020) - 1 -
Box Manhole
Assembly
- D-7 - RESERVED
- D-8 (2021) - Pipe
Bedding and Pipe Flared End
Support
- D-9 (2020) - Perforated
Pipe
Underdrain
- D-10 (2020) - Pipe
Plugging
- D-11 - RESERVED
Section IV - Erosion
Note: Click icon
for MicroStation DGN file format
- E-1 (2020) - Concrete
Washout
- E-2 Silt Fence
- E-2 (2020) - 1 -
Silt
Fence
- E-2 (2020) - 1 -
Super Silt
Fence
- E-2 (2020) - 1 -
Silt
Fence
- E-3 (2020) - Sediment
Trap
- E-4 (2020) - Inlet
Sediment Control, Drainage
Inlet
- E-5 (2020) - Inlet
Sediment Control, Culvert
Inlet
- E-6 (2020) - Portable
Sediment
Tank
- E-7 (2014) - Sump
Pit
- E-8 (2020) - Skimmer
Dewatering
Device
- E-9 Check Dam
- E-9 (2020) - 1 -
Stone Check
Dam
- E-9 (2020) - 2 -
Compost Filter Log Check
Dam
- E-9 (2020) - 1 -
Stone Check
Dam
- E-10 (2020) - Temporary
Slope
Drain
- E-11 (2014) - Incremental
Stabilization
- E-12 - RESERVED
- E-13 - RESERVED
- E-14 (2014) - Stabilized Construction Entrance
- E-15 (2014) - Sandbag Dike
- E-16 (2014) - Sandbag Diversion
- E-17 (2020) - Geotextile-lined
Channel
Diversion
- E-18 (2014) - Turbidity Curtain
- E-19 (2020) - Stilling
Well
- E-20 (2014) - RipRap Energy Dissipator
- E-21 (2020) - Stone
Outlet
Section V - Landscaping
Note: Click icon for MicroStation DGN file format
- L-1 - Planting Details
- L-1 (2017) - 1 - Roadside Shrub Planting Detail
- L-1 (2017) - 2 - Tree Planting Detail
- L-1 (2017) - 3 - Perennial/Ground Cover Planting Detail
- L-1 (2017) - 1 - Roadside Shrub Planting Detail
Section VI - Miscellaneous
Note: Click icon
for MicroStation DGN file format
- M-1 (2021) - Right-of-Way
Fence
- M-2 (2020) - Right-of-Way
Monumentation
- M-3 (2021) - Shared-Use
Path & Sidewalk
Details
- M-4 (2011) - Bike Rack
Layout
Details
- M-5 (2020) - Wood Rail
Fence
- M-6 (2020) - Patterned
Hot-Mix or Concrete & Brick Paver
Details
- M-7 (2020) - Chain Link
Fence
Details
- M-8 (2014) - PCC
Parking
Bumper
- M-9 - Bus Stop Pad Details
- M-9 (2021) - 1 -
Bus Stop Details, Types 1, 2, &
3
- M-9 (2021) - 2 -
Bus Stop Pad with Shelter Details,
Types 1 &
2
- M-9 (2021) - 1 -
Bus Stop Details, Types 1, 2, &
3
- M-10 - Bridge Safety Fence
- M-10 (2014) - 1 -
Bridge Safety Fence Type 1
- M-10 (2014) - 2 - Bridge Safety Fence, Type 2
- M-10 (2017) - 3 - Hardware
- M-10 (2014) - 1 -
Bridge Safety Fence Type 1
- M-11 - Steel plate
- M-11 (2021) - Steel Plate Roadway
- M-12 (2020) -
Steel Plate Bridge
Deck
- M-13 (2021) - Steel Plate Bridge Deck
- M-11 (2021) - Steel Plate Roadway
- M-12 (2021) - Driveway Transverse Slope Grading
- M-13 (2021) - Temporary Pedestrian Pathway
- M-14 (2021) - Pinned to Unpinned Temporary PCC Safety Barrier Connection
Section VII - Pavement
Note: Click icon for MicroStation DGN file format
- P-1 - PCC Pavement
- P-1 (2020) - 1 -
Slab Plan (With Dowel and Tie
Locations)
- P-1 (2020) - 2 -
Joint and
Sealant
- P-1 (2020) - 3 -
W Bolt, Hook Bolt, Dowel and Tie Bar
- P-1 (2020) - 4 -
Dowel Support
Basket
- P-1 (2020) - 5 -
Dowel and Tie Bar Placement tolerance
- P-1 (2020) - 1 -
Slab Plan (With Dowel and Tie
Locations)
- P-2 - PCC Pavement Patching
- P-2 (2020) - 1 -
Full Depth Patch Plan
Views
- P-2 (2020) - 2 -
Full Depth Patch, Section
Views
- P-2 (2020) - 3 -
Full Depth Patch, Sealant, Grout Retention
Disk and Dowel
Bars
- P-2 (2020) - 4 -
Full Depth Patch, Dowel Bar Placement
Tolerance
- P-2 (2020) - 5 -
Partial Depth Patch, Plan and Section
Views
- P-2 (2020) - 1 -
Full Depth Patch Plan
Views
- P-3 (2014) - Butt Joints
- P-4 (2020) - Permanent
Cross-Road Patch Over Pipe
Trench
- P-5 - Rumble Strips
- P-5 (2018) - 1 Rumble Strips
- P-5 (2018) - 2 Rumble Strips
- P-5 (2018) - 1 Rumble Strips
- P-6 (2021) - Pavement Safety Edge
Section VIII - Traffic
Note: Click icon for MicroStation DGN file format
- T-1 - Conduit Junction Wells
- T-1 (2020) - 1 -
Type
1
- T-1 (2020) - 1 -
Type
1
- T-1 (2020) - 2 -
Type
4
- T-1 (2020) - 3 -
Type
5
- T-1 (2020) - 4 -
Type
7
- T-4 (2020) - 1 - Types
M, K, &
F
- T-4 (2020) - 2 - Types
P &
R
- T-5 (2017) - 1 - Round Base & Round Base With Square Foundation Header
- T-5 (2021) - 2 - Typical Section and Installation (Bases 1, 2, 2A, 2B, 3, 3A, and 3B)
- T-5 (2021) - 3 - Typical Section (Base 6) and Pole Base Data Chart
- T-5 (2021) - 4 - Typical Section (Base 4A and 4B) and Anchor and Breakaway Coupling
- T-8 (2021) - 1 -
Junction Well Behind Curb Or Curb and
Gutter With Grass
Strip
- T-8 (2020) - 2 -
Junction Well Behind Curb Or Curb and
Gutter With Or Without
Sidewalk
- T-8 (2020) - 3 -
Junction Well In Concrete
Island
- T-8 (2020) - 4 -
Junction Well Without Curb and Gutter With
Sidewalk and Grass Strips and Directly Adjacent to Paved
Surface
- T-9 (2020) - 1 -
Loop Detector Sawcut Typical, Hot Mix
Surface Section, and Splice
Kit
- T-9 (2020) - 2 -
Typical Intersection
Layout
- T-9 (2020) - 3 -
Pedestrian Crossing Typical Layout
- T-9 (2020) - 4 -
Wiring Color
Codes
- T-11 (2020) - 1 -
Intermediate Messenger Wire Attachment On
Wood
Poles
- T-11 (2020) - 2 -
Angular Intermediate Messenger Wire
Attachment
- T-12 (2020) - 1 -
Attachment Between
Poles
- T-12 (2020) - 2 -
Dead End Messenger Wire Attachment
- T-12 (2020) - 3 -
Span Wire
Assembly
- T-14 (2020) - 1 -
Upright
Mount
- T-14 (2020) - 2 -
Inverted
Mount
- T-17 (2020) - 1 -
100 Amp (3+
Devices)
- T-17 (2020) - 2 -
100 Amp
(Condensed)
- T-17 (2020) - 3 -
100 Amp (Up to 2
Devices)
- T-17 (2020) - 4 -
200 Amp - Standard Lighting Component
Installations
- T-17 (2020) - 5 -
Lighting Component Installations (12 Or
Less
Fixtures)
- T-18 (2021) - 1 - Pushbutton Assembly Location On Pole
- T-18 (2020) - 2 -
Sign
Attachment
