SRPE AASHTO Specifications.

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Bathsheba Lambert
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1 SRPE AASHTO Specifications July 19, 2013

2 Steel Ribbed HDPE = SRHDPE = SRPE Now has AASHTO Design and Construction Specifications for SRPE. 2 But wait there is more AASHTO Bridge Design Specs - Section 12 SRPE AASHTO MP Fiberglass Pipe ASTM D3262 Corrugated PP AASHTO MP 21

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5 SRPE Marketing 5

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7 SRPE Marketing Metal + Plastic = Strength and Durability Finally a drainage product that is engineered for service and long life! 7 Two dissimilar materials utilized in a composite pp pipe structure will interact with each other once in an installed condition what will happen???

8 SRPE Questions 8 Is Local Buckling Equation Applicable?

9 SRPE Questions 9 What about the steel? f Compressive Stresses - Yes Bending Stresses - No

10 10 Design Considerations Local buckling equation should be verified for metal constrained by polyethylene Global buckling equation should be verified for a non-uniform steel/polyethylene profile Bending stresses should be considered

11 11 Design Issues Calculations l should be reviewed by Engineer to determine that appropriate allowable steel stresses were used. Fatigue may need to be considered if under a shallow installation using really high allowable stress levels.

12 12 Stress in Polyethylene

13 13 AASHTO Bridge Design Section Section Properties Dimensions and properties of pipe crosssections; minimum seam strength; mechanical and chemical requirements for aluminum corrugated and steel corrugated pipe and pipearch sections; and aluminum and steel corrugated structural plate pipe, pipe-arch, and arch sections, may be taken as given in Appendix A12. Dimensions, properties of pipe crosssections, and material properties for steelreinforced thermoplastic culverts shall be provided by the pipe manufacturer. (emphasis added)

14 14 AASHTO Bridge Design Section 12 C commentary Steel-reinforced thermoplastic culverts are pipe sections in which the main load-carrying members are steel ribs encapsulated by thermoplastic material that may brace the ribs from distortion and buckling. This composite system should be evaluated independently for each manufacturer s pipe system. Designers should obtain the required mechanical properties directly from the pipe manufacturer to determine fill heights. (emphasis added)

15 15 AASHTO Bridge Design Section 12

16 16 AASHTO Bridge Design Section 12 C commentary While the steel ribs are the main load carrying member of the culvert, the thermoplastic profile braces the steel ribs from distortion or buckling under load is critical to the pipe performance. The liner also serves to distribute the load between ribs. A structural evaluation of the profile alone is not required. However, an evaluation of the composite system of thermoplastic liner and steel rib is necessary. It is important to assure that the tensile strains within the profile do not exceed the long-term strain capacity for the thermoplastic material used in the construction of the pipe. pp (emphasis added)

17 17 AASHTO Bridge Construction Specs Description This work shall consist of furnishing, fabricating, installing, and inspecting metal pipe, structural plate metal pipe, arches, pipe arches, box structures, and deep corrugated structures, and steelreinforced thermoplastic pipe in conformance with these Specifications and the details shown in the contract documents.

18 18 AASHTO Bridge Construction Specs General Backfill for metal and steel-reinforced thermoplastic culverts shall be granular material, as specified in the contract documents and specifications, and shall be free of organic material, rock fragments larger than 3.0 in. (1.5 in. for steel reinforced thermoplastic pipe) in the greatest dimension, and frozen lumps, and shall have a moisture content t within the limits required for compaction.

19 19 AASHTO Bridge Construction Specs Steel-Reinforced Thermoplastic Culverts Steel-reinforced thermoplastic culverts shall conform to the requirements of AASHTO MP 20. (emphasis added) AASHTO MP has been approved for 12-60

20 AASHTO Section 26 Metal - Joints Steel Reinforced Thermoplastic Culvert Joints Joints for steel reinforced thermoplastic pipe shall comply with the details shown in the contract drawings and on the approved working drawings. Each joint shall be sealed to prevent infiltration of soil (soiltight), fines (silttight), or water (watertight) as required by the contract documents. Field tests may be required by the Engineer whenever there is a question regarding compliance with the contract requirements. Joints shall be installed so that the connection of pipe sections will form a continuous surface free from irregularities in the flow line. (emphasis added)

21 AASHTO Section 26 Metal - Joints 21 C26425 C commentary Joint types include bands, bell-and-spigot pipe ends, double-bell couplings, and fusion welded joints. Joints may or may not require gaskets. Other joint types may be used provided that documentation is provided to demonstrate that the joint meets the project requirements. Joints are often provided as soiltight or watertight. Definitions of soiltight and silttight are vague. Examples can be found elsewhere in this Section. Watertight joints are normally specified to meet ASTM D3212. Pressure capability of joint shall be based on project requirements. Commonly available pressure capabilities are 2, 5, and 10 psi. (emphasis added)

22 SRPE Marketing Material 22 Achieves a water tight joint performance that sets it apart from conventional pipe products. Tested to 15 psi, the steel reinforced High Performance (HP) joints greatly exceed ASTM s 10.8 psi requirement. For lower performance applications, 3 psi low head (LH) or soil tight (ST) joints are available. Leak-free ElectroFusion (EF) joints are also an option.

23 23 SRPE Specification Sheet Soil Tight Joints (30 96 ) shall be plain ended SRPE pipe with Aluminized i dtype 2( (or optional Polymeric coated) CMP coupling bands and elastomeric gaskets.

24 24 SRPE Specification Sheet Low Head (LH) Joints (30 72 ) shall be gasketed, stress-rated t high h density polyethylene bell and spigot joints that have been laboratory tested to 3 psi when tested in accordance with ASTM D3212.

25 25 SRPE Specification Sheet High Performance (HP) Joints (30 72 ) shall be gasketed, bell and spigot joints where both the bell and spigot are reinforced with steel that is fully encased in stress-rated high density polyethylene and that have been laboratory tested to 15 psi when tested in accordance with ASTM D3212.

26 SRPE Specification Sheet ElectroFusion (EF) Joints ( ) shall utilize plain ended SRPE pipe welded d together th utilizing i exclusive pressure testable ElectroFusion couplers. The welded connections provide a true in-field watertight system assured by the pressure testable welded sleeves at each welded connection. The field installed ElectroFusion joints shall remain watertight with a zero leakage rate up to a test t pressure of 30 psi. 26

27 AASHTO Section 26 Metal 27

28 AASHTO Section 26 Metal Continued 28 All pipe laying, joining, and backfilling shall be in accordance with the strictest of the following requirements: the Manufacturer s instructions, the contract documents, or these Specifications.

29 SRPE Specification Sheet Installation Installation shall be in accordance with ASTM D2321 Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications along with product-specific recommendations contained in manufacturers Installation Guidelines. 29

30 AASHTO Section 26 Metal 30

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32 Trench Width 32

33 Trench Width 33 Pipe Outside ASTM AASHTO AASHTO Diameter Diameter 2321 Sec. 30 Sec NA* NA* NA* NA* NA* NA* NA* NA* NA* NA* *For trench conditions, the trench shall be excavated to the width, depth, and grade shown in the contract documents.

34 AASHTO Section 26 Inspection Requirements Visual Inspection Final internal inspections shall be conducted on all buried installations to evaluate issues that may affect long-term performance. Final inspections shall be conducted no sooner than 30 days after completion of installation and final fill. (emphasis added)

35 AASHTO Section 26 Inspection Requirements Visual Inspection Steel reinforced thermoplastic pipe shall be inspected prior to backfilling to ensure that the external reinforcing ribs do not lean an average of more than 15 degrees off of vertical within any 24.0 in. long continuous section of the pipe. If this condition exists, that portion of the pipe shall be remediated or replaced. Joint types include bands, bell-and- spigot pipe ends, double-bell bell couplings, and fusion welded joints. (emphasis added)

36 AASHTO Section 26 Inspection Requirements Installation Deflection for Steel- Reinforced Thermoplastic Culverts The pipe shall be evaluated to determine whether the internal diameter of the barrel has been reduced more than five percent when measured not less than 30 days following completion of installation.

37 AASHTO Section 26 Inspection Requirements Installation Deflection for Steel- Reinforced Thermoplastic Culverts Pipes shall be checked for deflection using a mandrel or any other device approved by the Engineer that can physically verify the dimensions of the pipe and that is not limited by poor lighting, waterflow, pipe length, or other limiting conditions of the installed environment. Pipes larger than 24.0 in. may be entered and deflection levels measured directly.

38 AASHTO Section 26 Inspection Requirements Installation Deflection for Steel- Reinforced Thermoplastic Culverts In all pipe installations, at least ten percent of the total pipe footage on the project shall be randomly selected by the Engineer and inspected for deflection. Also, as determined by the 100 percent visual inspection in Article , all areas in which deflection can be visually detected shall be inspected for deflection.

39 AASHTO Section 26 Inspection Requirements Installation Deflection for Steel- Reinforced Thermoplastic Culverts Where direct measurements are made, a measurement shall be taken once every 10.0 ft for the length of the pipe and a minimum of four measurements per pipe installation are required. If a mandrel is used for the deflection test, it shall be a nine- (or greater odd number) arm mandrel and shall be sized and inspected by the Engineer prior to testing. A properly sized proving ring shall be used to check or test the mandrel for accuracy. The mandrel shall be pulled through the pipe by hand with a rope or cable. Where applicable, pulleys may be incorporated in the system stem to change the direction of pull so that inspection personnel need not physically enter the pipe or manhole. 39

40 AASHTO Section 26 Inspection Requirements Installation Deflection for Steel- Reinforced Thermoplastic Culverts For locations where pipe deflection exceeds five percent of the inside diameter, an evaluation shall be conducted by the Contractor utilizing a Professional Engineer and submitted to the Engineer for review and approval, taking into consideration the severity of the deflection, structural integrity, environmental conditions, and the design service life of the pipe. Pipe remediation or replacement shall be required for locations where the evaluation finds that the deflection could be problematic. For locations where pipe deflection exceeds 7.5 percent of the inside diameter, remediation or replacement of the pipe is required. 40

41 SRPE Marketing 41 Was designed with a smooth inner wall for outstanding hydraulics. Higher flow rates are achieved with a smooth polyethylene water way thereby providing the engineer the design the option to reduce the pipeline diameter: Saving you money.

42 SRPE Pipe Dimensions 42

43 43 SRPE Smooth Operator??? SRPE does not provide an improved hydraulic efficiency i when compared to RCP. Laboratory tests have shown that just the opposite is true and RCP has a slight edge in hydraulic efficiently. SRPE Manning s n SRPE Manning s n

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46 Wall Thickness 46 SRPE Manufacture Specification

47 Wall Thickness 47 Nominal Pipe Size Min Waterway Wall Thickness Man. Spec Min Waterway Wall Thickness ASTM F2562 inch inch inch NA

48 48 Smooth Polyethylene y e e Water Way?

49 SRPE Marketing Manufactured in standard lengths of 14 or 22-feet with bell and spigot joints. Fewer joints = faster installation Light weight = easily handled d and installed 49 Remember D2321 and manufacturer's installation ti guide 6-8 lifts.

50 SRPE Strength Manufactured with a pressure rated resin with predictable performance properties the engineer can depend on 50 Conventional HDPE evidence of slow crack growth (pipe cracking and delamination) Conventional HDPE has creep and buckling issues SRPE has steel that will not creep and buckle SRPE uses pressure rated resins

51 SRHDPE Weaknesses It s steel ribbed, but it s still HDPE 51

52 52 Learn D2321 Learn D3212 Keep up with manufacturer s own installation guide and spec sheet Work the specs from the local angle

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SPECIAL SPECIFICATION 4425 Thermoplastic Pipe

2004 Specifications CSJ 0264-07-028 SPECIAL SPECIFICATION 4425 Thermoplastic Pipe 1. Description. Furnish and install thermoplastic pipe for constructing thermoplastic pipe culverts or thermoplastic storm