Design Detail Library

This site has pre-drawn design details that can be inserted into individual projects as required. It is the responsibility of the engineer using these details to ensure that the detail is accurate for a specific project. These details are not drawn to scale and are not Standard Drawings. Details in this design detail library may or may not have previously approved for use on a project. The user should not assume that any of these details are pre-approved.

Design Details are for guidance of design engineers, technicians, consultants, and inspection personnel engaged in roadway design, plan preparation, and construction for ALDOT. They are prepared to encourage uniform application of designs and standard details in plan preparation of roadways.

Revisions or additions to these details shall be issued periodically and shall be the responsibility of the user.

Plans Preparation

No.	File
1	2022 Index to sheets

2024 Special Project Details

No.	File
1	DETAILS OF EXTRUDED ALUMINUM PANEL SIGNS

Special Project Details

No.	File
1	Special Drawing Of Guardrail End Anchor Type 2-A To Be Used At Bridges With 1’-6” Safety Curb
2	Special Drawing Of Guardrail End Anchor Type 2-A (Retrofit) To Be Used At Bridges With 1’-6” Safety Curb
3	Double Faced Galvanized Steel Beam Guardrail With Blocked Out Galvanized Steel Posts
4	Vehicle Enforcement Lane Detail Vehicle Enforcement Lane Detail DGN
5	Vehicle Enforcement Lane Concrete Slab Detail
6	Additional Signs (1 of 4) Additional Signs (2 of 4)
7	Additional Signs (3 of 4) Additional Signs (4 of 4)
8	Details of Thrie-Beam Bridge Rail Retrofit (Sheet 1 of 2)
9	Details of Thrie-Beam Bridge Rail Retrofit (For Bridge Expansion Joint Sheet 2 of 2)
13	Guardrail Height Adjustment

Hydraulic Special Project Details

Special Project Detail Inlets

No.	File
1	Curved Vane Inlet
2	Project Detail of Inlet Type E-1 modified for Type C Curb and Gutter.
3	Project Detail of inlet Type E-2 modified to fit 2' wide Barrier Island
4	Detail Curb Inlet Type “Pb” (Sheets 1 of 2)
5	Detail Curb Inlet Type “Pb” (Sheets 2 of 2)
6	Detail Of Bicycle Safe Ditch Inlet Type – Pd
7	Detail Of Bicycle Safe Ditch Inlet Type “Pd-6”
8	Project Detail Inlet Type "PD-6" (Bicycle Safe Detail Inlet)
9	Details Of Inlet – Type “Pr”
10	Details of Inlet - Type "PR".(Roadway Inlet)
11	Modified S3/S4 inlet with back open
12	V-1 Inlet for Valley Gutters
13	V-2 Inlet for Valley Gutters
14	Type “Y” Inlet (Sheet 1 of 2)
15	Type “Y” Inlet (Sheet 2 of 2)
16	Project Detail For Type “Y” Inlet (Case 4) When Partly Constructed On Grade & Drain Projects And When Partly Constructed On Base & Pave Projects

Special Project Detail Dissipators

No.	File
1	Stilling Basin (Baffle Wall Enegy Dissipator) Type “00” (Sheet 1 Of 3)
2	Stilling Basin (Sheet 2 Of 3)
3	Stilling Basin (Baffle Wall Energy Dissipator) Type “00” (Sheet 3 Of 3)
4	Details Of Riprap Energy Basin (Sheet 1 of 2)
5	Details Of Riprap Energy Basin (Sheet 2 of 2)
6	Slope Paved Ditch Energy Dissipators

Special Project Detail Junction Boxes

No.	File
1	Junction Box, Type Special CS 3 X 2 To 30” Pipe
2	Type Special Junction Box, CS3 X 3 42” Pipe
4	Type Special, Junction Box CS 3 X2 To 44”S, 27”R Pipe
5	Type Special Junction Box, CS 3 X 2 To 44s, 27r Pipe (Sheet 2 of 2)
6	Junction Box, Type Special CS 3 X 2 To 42” Pipe
7	Type Special, Junction Box CS 3 X2 To 44”S, 27”R Pipe
8	CS 4 x 2 TO 51” S, 31” R Pipe Junction Box, Type Special
9	Junction Box, Type Special CS 5 x 2 TO 51” S, 31” R PIPE
10	Special Project Details For Junction Box, Type 3 (Modified)

Slotted Drain Details

No.	File
1	Reinforcement of Transverse slotted drain pipe
2	Slotted drain connection to existing or required structures

Concrete Collars and Plug

No.	File
1	Sketch for pipe Plugs; Sketch for concrete collars
2	Sketch for culvert plug

For questions or comments contact: thomasjo@dot.state.al.us