General Supplemental Specifications

The following items have been approved by the SUDAS Board of Directors and available for use. These items will be included in the 2026 Edition of the SUDAS Standard Specifications in December. Click on the topic title for the marked up version of the revision; click on the section reference for a clean version of the section that incorporates the change.

Progress payment retainage (Section 1090, 1.05, B)
A new law was signed 4/25/25 lowering the maximum amount of retainage from 5% to 3%.

Proof rolling (Section 2010, 3.06, B)
Modify language to add expiration and conditions to require proof rolling to be performed again.

Concrete pipe supports (Section 3010, 1.08, F and G)
Add bid items to pay for concrete pipe supports of new and existing utility lines.

Pipe size for solid wall PVC pipe (Section 4010, 2.01, B)
Modify language to increase allowable pipe size for sanitary sewers from 27 to 48 inch for solid wall PVC materials.  This complies with the cited ASTM F 679 and conforms to the existing design table for buried depths.

Pipe size for closed profile PVC pipe (Section 4010, 2.01, D)
Modify language to increase allowable pipe size for sanitary sewers from 36 to 60 inch for closed profile PVC materials.  This complies with the cited ASTM F 1803 and conforms to the existing design table for buried depths.

Sewer video inspections (Section 4060, 3.02, A and D)
Add language to better ensure quality of video inspections being performed and to allow rejection by the Engineer.

Thrust block and anchor block sizing (Figure 5010.101)
Modify thrust block sizing chart based on calculations.  Add formula and table for anchor block sizing.

Infiltration barriers on polypropylene adjustment rings (Section 6010, 2.09, A, 3 and 2.11, A, 4)
Remove language prohibiting the use of heat shrinkable infiltration barriers based on independent testing performed.

Dowel bar retrofit (Figure 7040.106/PR-106)
Iowa DOT Construction and Materials Bureau requested making our dowel bar retrofit detail a shared figure with some very minor modifications.

City Supplemental Specifications

Some cities revise the SUDAS Specifications, creating a city supplemental specifications document. We are collecting a list of city supplemental specifications, which can be found here.

 

Page revised: May 28, 2025