Section_III_-_Sewer_Details.pdf
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- Solicitation number
- 101624
- Issued by
- Prince George's County, Maryland
About this file
This is a standard details reference document for sewer infrastructure components issued by the Washington Suburban Sanitary Commission (WSSC) in Maryland, dated September 2021. The document serves as a technical specification guide containing 49 detailed design standards for sewer system components, including precast concrete manholes of various diameters (48-inch through 96-inch), manhole frames and covers, pipe-to-manhole connections, cleanout installations, sewer house connections, drop connections, and related appurtenances. The standards cover both gravity and force main systems, with specifications for materials including reinforced concrete pipe, polyvinyl chloride (PVC), ductile iron pipe (DIP), and vitrified clay pipe. The table of contents provides a comprehensive index of design details organized by function, from basic manhole construction (Standards S/1.0 through S/1.4) through pipe connections, drop connections, cleanouts, house connections, repair methods, and load schedules. These standards are referenced in conjunction with the Water and Wastewater Engineering Services Basic Ordering Agreement solicitation, establishing the technical requirements and specifications that consultants must follow when providing asset rehabilitation design, engineering services, and technical support for WSSC's collection and distribution systems.
The document functions as a technical reference standard that establishes uniform construction and design specifications for all sewer infrastructure work performed under WSSC contracts. These standards ensure consistency, compatibility, and structural integrity across the utility's wastewater collection system and are mandatory references for engineers and contractors developing rehabilitation designs, inspection assessments, and system improvements. The specifications address depth variations, terrain challenges including steep grades, and accommodate both new construction and retrofit applications over existing infrastructure, making them applicable to the comprehensive scope of water and wastewater engineering services outlined in the related basic ordering agreement.
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Text version
SECTION III
SEWER
DETAILS
SEPTEMBER 2021
Page S-1
Table of Contents WSSC STANDARD DETAILS
SECTION III - SEWER DETAILS
TABLE OF CONTENTS
TITLE NUMBER
48-inch Diameter Precast Concrete Manhole S/1.0
60-inch Diameter Precast Concrete Manhole S/1.1
72-inch, 84-inch and 96-inch Diameter Precast Concrete Manhole S/1.2
Precast Top Slab for 48-inch and 60-inch Diameter Precast Concrete Manholes S/1.3
Precast Concrete manhole with Fall Prevention System S/1.4
Precast Concrete Manhole Built Over Existing Sewer - Type II S/2.1
Precast Manhole Built On Existing PVC or DI Pipe S/2.2
Pipe to Existing Brick Manhole Connection For Using DIP, RCP or S/3.0 AWWA C900/905 PVC Only
Bentonite Application for Grouted Pipe to Manhole Connection S/3.01
Pipe to Manhole Connection for Deep Manhole S/3.02
Pipe to Manhole Connection for 12-inch and Smaller Pipes on Steep Grades S/3.03
Drop Manhole Type "A" Drop for Pipes 12-inch and Smaller S/3.1
Drop Manhole Type "B" Drop for Pipes 12-inch and Smaller S/3.1a
Inside Drop Connection for Precast Concrete Manholes S/3/1b
Inside Drop Connection for Precast Concrete Manholes (Fiberglass Drop Bowl) S/3.1c
Shallow Manhole Precast Concrete S/3.2
Plan of Typical Channelization of Mainline Sewer Manholes S/3.3
Manhole steps in Channels for Sewer 36-Inch and Larger S/3.4
Abandonment of Pipe at Manhole S/3.5
Manhole and Sewer Abandonment S/3.6
Page S-2
15-inch and Larger Sewer Pipe to Manhole Connection S/3.7
Adjusting Rings for 22-inch Opening Watertight Manhole Frame and Cover S/4.0
Adjusting Rings for 22-inch Opening Old Type Standard Manhole Frame and Cover S/4.1
Final Setting Anchoring 24-inch Watertight Frame and Cover to Manhole Wall S/4.2
Interim Setting Anchoring 24-inch Watertight Frame and Cover to Manhole Cone S/4.2a
24-inch Precast Concrete Manhole Transition Ring S/4.21
24-inch Precast Concrete Manhole Sloped Transition Ring S/4.22
Anchoring 30-inch and 36-inch Manhole Frame and Cover to Manhole Wall S/4.3
Standard Cleanout Installation for 4-inch and 6-inch Sewer House Connections S/5.0
Trenchless Cleanout System for Installation on Existing 4-inch and 6-inch Sewer S/5.0a House Connections
Cleanout Cover Assembly for 4-inch Cleanouts S/5.1
Cleanout (Lamphole) Cover Assembly for 6-inch Cleanouts S/5.2
4-inch and 6-inch Drop House Connections to Sewer Main S/6.0
4-inch and 6-inch Drop House Connections to Manhole S/6.1
4-inch and 6-inch Sewer House Connections S/6.2
4-inch and 6-inch PVC House Connections and Fittings S/6.3
4-inch and 6-inch DIP or PVC AWWA C900 House Connections and Fittings S/6.3a
4-Inch Radial Multiple Sewer House Connections Installation and Channelization S/6.4
Parallel Multiple 4-Inch Sewer House Connection Installation S/6.5
Transition Manhole Force Main to Gravity Sewer S/6.6
4-inch and 6-inch Sewer House Connection Within WSSC Right of Way S/6.7
4-inch and 6-inch Sewer House Connections Terminating at the Property Line S/6.8
Backwater Valve Assembly for 4-Inch Existing Sewer House Connections S/6.9
Backwater Valve (Lamphole) Cover Assembly S/6.9a
Page S-3
Replacement of Existing Backwater Valve Assembly in Existing Brick Manhole S/6.9b
Method of Repairing Cracked Concrete or Vitrified Clay Sewer Pipe S/7.2
Method of Repairing Cracked Concrete or Vitrified Clay Sewer Pipe S/7.2a
Load Schedule for R.C. Pipes S/8.0
Polyvinyl Chloride (PVC) Gravity Sewer Pipe Load Chart S/8.1
| 1 - S 1.0 |
| 2 - S 1.1 |
| 3 - S 1.2 |
| 4 - S 1.3 |
| 5 - S 1.4 |
| 6 - S 2.1 |
| 7 - S 2.2 |
| 8 - S 3.0 |
| 9 - S 3.01 |
| 10 - S 3.02 |
| 11 - S 3.03 |
| 12 - S 3.1 |
| 13 - S 3.1a |
| 14 - S 3.1b |
| 15 - S 3.1c |
| 16 - S 3.2 |
| 17 - S 3.3 |
| 18 - S 3.4 |
| 19 - S 3.5 |
| 20 - S 3.6 |
| 21 - S 3.7 |
| 22 - S 4.0 |
| 23 - S 4.1 |
| 24 - S 4.2 |
| 25 - S 4.2a |
| 26 -S 4.21 |
| 27 - S 4.22 |
| 28 - S 4.3 |
| 29 - S 5.0 |
| 30 - S 5.0a |
| 31 - S 5.1 |
| 32 - S 5.2 |
| 33 - S 6.0 |
| 34 - S 6.1 |
| 35 - S 6.2 |
| 36 - S 6.3 |
| 37 - S 6.3a |
| 38 - S 6.4 |
| 39 - S 6.5 |
| 40 - S 6.6 |
| 41 - S 6.7 |
| 42 - S 6.8 |
| 43 - S 6.9 |
| 44 - S 6.9a |
| 45 - S 6.9b |
| 46 - S 7.2 |
| 47 - S 7.2a |
| 48 - S 8.0 |
| 49 - S 8.1 |
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