Tips & Advice Posts

The Nebraska Department of Transportation outlines specifications regarding the proper fabrication, installation and setup of concrete protective barriers.

Nebraska Concrete Barrier General Notes: Fabrication and Installation

The Nebraska Department of Transportation’s general instructions are as follows. Note that these details are for the fabrication and installation of concrete protection barriers, and the details described are typical.

1. Concrete protection barriers should be made of 5,000 PSI concrete and be precast in accordance with applicable portions of Section 705 in the standard specifications. The forms may be removed when the concrete has attained a compressive strength of 2,175 PSI. The barriers may be transported within the plant once the concrete has attained a compressive strength of 3,000 PSI. The barriers may be shipped when the concrete has attained a compressive strength of 5,000 PSI.
2. Reinforcing steel used within the concrete should conform to the requirements of ASTM A 615, Grade 60.
3. The loop reinforcing steel should be smooth, meeting the requirements of ASTM A 706, Grade 60 or ASTM A 615, Grade 60, which has been modified to meet the following physical and chemical requirement:

a. Tensile Requirementsi. Yield strength: 60,000 PSI minimumii. Tensile strength: 80,000 PSI minimumiii. Elongation in 8-inch: 14% minimumb. Chemical composition (max percents)i. Carbon: 0.30ii. Manganese: 1.50iii. Phosphorus: 0.035iv. Sulfur: 0.045v. Silicon: 0.50The loop should pass a 180 degree bend test on a 2-3/4” pin.

1. The Contractor or supplier should furnish the materials. They should research the manufacturer’s certified test reports for the actual heat of the steel being used that shows the chemical and physical test results for the loop reinforcing steel. This should be done before coating or fabrication begins.
2. All steel should be zinc-coated as specified below, or epoxy coated to Nebraska standards.
3. Zinc-coated (galvanized) steel bars should meet the requirements of ASTM A 123, (coating Grade 100, minimum coating of 2.30 ounces per square foot). The bars should be fabricated prior to galvanizing. The procedures of ASTM A 143 should be observed as applicable. All zinc coating damage due to fabrication or handling should be repaired with a zinc dust formulation in accordance with ASTM A 780.
4. The coating plant intending to supply the loop reinforcing steel should notify the Materials and Research Division two to three weeks before processing any material in order to arrange for NDOT personnel to inspect the materials. This should be done during the coating and fabrication process.
5. The contractor should provide the engineer a letter certifying the concrete protection barriers for use on this project have been made in accordance with these plans.

Nebraska Concrete Barrier General Notes: On Site Response

The Nebraska Department of Transportation’s general instructions for onsite response processes are as follows:

1. Concrete protection barriers are the property of the contractor.
2. The contractor should provide for an approved monitoring schedule, with a person on call and available 24 hours a day, each day of the week, to realign concrete protection barriers that have been struck.
3. Initiation of this service should be within one hour of notification of need.

Nebraska Concrete Barrier General Notes: Specifications

The Nebraska Department of Transportation’s general instructions for barrier specifications are as follows:

1. Use 1-1/8” diameter ASTM A 307 anchor bolts with heavy hex nut and washer (A36). Use ASTM A36 non-coated steel for the connection pin.
2. In regards to surface preparation, when place on a paved surface, all loose dirt and sand should be removed from the roadway prior to placement of the barrier.
3. Barriers must be pulled tight during installation to remove slack.
4. At no time should be barriers be lifted by use of the loop bars.

This blog post is an interpretation of specifications by the Nebraska Department of Transportation. Please consult with Nebraska DOT's most recent requirements for definitive information.

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Eiffel Trading helps customers sell their unneeded assets, including used barrier wall! Our barrier wall inventory ranges from k-rail barrier, to single slope barrier, to f-shape barrier and everything in between. Furthermore, our construction equipment inventory includes used foundation equipment, used concrete equipment, and much more.All of our listings are constantly being updated, but if you don’t see what you’re looking for, create a wanted listing for free.Ready to sell your used heavy equipment or construction material? List your products today for free on Eiffel Trading’s online marketplace.If you have any questions or would like additional information, please call us at 1-800-541-7998 or email sales@eiffeltrading.com.

The Louisiana Department of Transportation outlines specifications regarding the proper installation and removal for temporary precast concrete barriers, summarized here.

Barrier Units

Barrier units are required to be furnished by the contractor unless specified otherwise. Each barrier unit should be 15 feet in length. When the barrier units are furnished by the Department, the units will be furnished at no cost to the contractor. It is the contractor’s duty to load the barrier units at the location specified, deliver the units to the construction site, and place them as required. The contractor should relocate barrier units as required during construction.

Connecting Pins and Plastic Reflectors

Connecting pins and plastic reflectors can be furnished at no additional cost to the Department. Reflectors should each have a 7 square inches minimum reflective area. Install reflectors a maximum of 15 feet apart (on each side) and in accordance with the manufacturer’s recommendations. Replace damaged pins or reflectors as directed by the engineer.

Barrier Removal

After completion of the work, barrier units furnished by the Department should be removed, transported by the contractor to the location specified, and unloaded as directed. All costs of loading, transporting, and unloading the barrier units are included in the contract price for this item. Barrier units furnished by the contractor will, upon removal, remain the contractor’s property. Damaged barrier units should be repaired or replaced at no direct pay.This blog post is an interpretation of specifications by the Louisiana Department of Transportation. Please consult with Louisiana DOT's most recent requirements for definitive information.

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Eiffel Trading’s online marketplace advertises a wide variety of new, surplus, and used barrier wall types, including f-shape barrier, single slope barrier, and much more. Furthermore, our marine equipment inventory ranges from used sectional barges, to used winches, and everything in between.All of our listings are constantly being updated, but if you don’t see what you’re looking for, create a wanted listing for free.Ready to sell your used heavy equipment or construction material? List your products today for free on Eiffel Trading’s online marketplace.If you have any questions or would like additional information, please call us at 1-800-541-7998 or email sales@eiffeltrading.com.

The Missouri Highway and Transportation Commission outlines specifications regarding the proper dimensions for concrete F-shape barriers, including general notes, plan view details, elevation details, section details and connection details.

Missouri Temporary Concrete F-Shape Barrier General Notes

The Missouri Highway and Transportation Commission’s general instructions are as follows:

1. All reinforcing should meet the requirements of CRSI except where shown on the plans.
2. Reinforcing steel clearance to the edge of concrete should be 1-3/4” unless otherwise shown on the plans.
3. At no time should the barriers be lifted or moved by use of the loop bars.
4. Furnished sections should comply with dimensions shown, as approved by the engineer.

Missouri Temporary Concrete F-Shape Barrier Specifications

F-shape barriers in Missouri should conform to the following dimensions and include the following features, according to the Missouri Highway and Transportation Commission’s specifications.Elevation ViewThe length of each barrier should measure 12’-6”. There should be two lifting slots on each barrier, spaced 2’-0” apart from each other. Each lifting slot should measure 1’-6” long and 3” high.There should be three loop bars protruding from each side of the barrier; there should be 3-3/8” (plus or minus 1/8”) when measured from the face of the barrier to the outside edge of the loop bars.Loop bars on the left side of each barrier should be spaced horizontally as follows, from the ground line to the top of the barrier:

• Distance between the ground and the bottom loop bar = 4-1/2”
• Distance between the bottom and middle loop bar = 3”
• Distance between the middle and upper loop bar = 1’-5”
• Distance between the upper loop bar and the top of the barrier = 7-1/2”

These measurements should be inverted for loop bars on the right side of each barrier.Optionally, include 4” diameter, 11 gauge steel round mechanical tubing sleeve holes. If included, these holes should be spaced 2’-0” from each side of the barrier.Running vertically through the barrier are #4 A bars; these should be spaced as follows, from left to right, starting at the left edge of the barrier and ending at the right edge of the barrier: 2”, 9”, 8-3/4”, 1’-3-1/4”, 1’-9-1/4”, 6”, 8-1/2”, 6”, 1’-9-1/4”, 1’-3-1/4”, 8-1/2”, 8-3/4”, 9”, 2”.Plan ViewAccording to the plan view, each barrier should include the following bars: #6 E BAR, #5 C BAR, #4 D BAR and #4 A Bar.Barriers should be 1’-10-1/2” wide.

Missouri Temporary Concrete F-Shape Barrier Section Details

F-shape barrier sections in Missouri should conform to the following dimensions and include the following features, according to the Missouri Highway and Transportation Commission specifications.Section A-ASection A-A outlines stirrup placement with bar reinforcement. Each barrier should include a ¾” radius edger with a 1” clearance. Similarly, there should be a 2” clearance between the top of the stirrup and the top of the barrier.Section B-BSection B-B shows the plan for an optional V-notch. According to this view, each barrier should include a ¾” chamfer and measure 8” wide at the top of the barrier and 1’-10-1/2” wide at the bottom of the barrier. Barriers should measure 2’-8” tall.Section C-CSection C-C details a void area for lifting, and a radius edger to prevent spalling.

Missouri Temporary Concrete F-Shape Barrier Connection Details

Connection Rod A36Connection rods measure 2’-4” in length. They include a top plate that is 2-1/2” wide, located 2-1/2” from the top of the rod. Each rod is 1-1/4” in diameter, with a 5/8” diameter hole for a retainer bolt at the bottom. A bottom washer is optional. Retainer bolt and nuts are ½” in diameter and 6” long.This blog post is an interpretation of specifications by the Missouri Department of Transportation. Please consult with Missouri DOT's most recent requirements for definitive information.

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The Mississippi Department of Transportation outlines specifications regarding the proper dimensions for concrete median barriers, including general notes, plan view details, elevation details, section details and connection details.

Mississippi Concrete Median Barrier General Notes

The Mississippi Department of Transportation’s general instructions are as follows:

1. Lifting devices and attachments to each barrier should be as approved by the engineer.
2. Place all steel reinforcements at a 2” minimum from the outside face of any wall, except as otherwise shown.
3. The anchor stud connectors should conform to AASHTO M 314, Grade 55. The HSS hex nuts and the hardened round washers should meet the requirements of ASTM A 325.
4. Concrete should be Class B (Class 1 finish). Reinforcing steel should meet the requirements of AASHTO M 31.
5. Steel rods should meet the requirements of ASTM A 36.
6. Connector rods, connector pins, nuts and washers should be galvanized, meeting the requirements of AASHTO M 111.

Mississippi Concrete Median Barrier Specifications

Concrete precast median barriers in Mississippi should include the following features, according to the Mississippi Department of Transportation specifications.Elevation ViewAccording to an elevation view, each barrier should measure 32” tall and 10’-0” long (plus or minus ½”). All coil loops should be recessed by ½”. Each barrier should include bars U, M, R, S, and L. Each barrier should also include two lifting slots, which are each 6” long and spaced 3’-1” from the end of the barrier to the beginning of the slot.Plan ViewAccording to the plan view, each barrier should include two ¾” diameter, 6” long, national coarse thread coil loop inserts. Two are required per section. These inserts should be spaced 3’-4” apart from each other, and 3’-4” away from each end of the barrier.End ViewFrom an end view, each barrier should measure 24” wide at the bottom of the barrier and 6” wide at the top of the barrier. Barriers should be 32” tall and included beveled edges. Each v-notch should measure 12” long. The break point should occur at 10”, with a 3” vertical reveal.

Mississippi Concrete Median Barrier Delineators

Delineators for concrete precast median barriers (type 1) in Mississippi should include the following features, according to the Mississippi Department of Transportation specifications.

1. Delineators should be required unless indicated otherwise on the plans. This item will not be measured separately, but will be included under payment for precast concrete barrier.
2. Delineators should be encapsulated lens reflective sheeting on aluminum sheet, 0.08” thick, or sheet steel, 14 gage, which is galvanized.
3. Include aluminum or stainless steel slotted round head machine screws, No. 10, 1-1/2” long, 2 washers and 1 hex head nut (commercial quality).
4. The delineators should be installed facing traffic with yellow on the left side and white on the right side, unless otherwise specified.
5. Spacing of delineators should be as follows:

a. Tangent section: 20’-0”b. Curved section: 10’-0”

1. Optional delineators, which are on the Mississippi Department of Transportation “list of approved materials,” will be accepted.

Mississippi Concrete Median Barrier Anchor Stud Connector Details

Alternate methods of connecting precast barriers, such as J-hooks, may be substituted for anchor studs if approved by the engineer.Each anchor stud connector should measure 2’-1” long and include a HSS hex nut “F” or 1-1/4 – 7 UNC HSS hex bolt head at the top, paired with one 1/8” nut.Rods should be threaded steel or 1-1/4” – 7 UNC HSS hex bolt.At the bottom of each connector, three items are required:

1. 1-1/4” – 7 UNC thread pitch (typ.)
2. Hardened round washer “H”
3. HSS hex nut “F”

Mississippi Concrete Median Barrier Quantities

The Mississippi Department of Transportation outlines approximate quantities for 10’ barriers.This blog post is an interpretation of specifications by the Mississippi Department of Transportation. Please consult with Mississippi DOT's most recent requirements for definitive information.

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Marine pile driving can pose some significant safety risks if proper precautions aren’t taken and if proper protocols aren’t in place. There are a lot of moving parts in marine pile driving. Proper use of hammers and proper application of pile driving materials is essential. Additionally, things like barge safety need to be taken into consideration. Below are some helpful tips to enhance marine pile driving safety intended for pile driving superintendents and pile driving teams to consider:

General Tips

• Come up with a plan that details safety protocols for crew members for each, individual pile driving project based on the scope and needs of the project. This plan should cover all the bases: use of barges, use of cranes, pile driving procedures, use of misc. equipment, trenching protocol, welding procedures, what to do with hazardous materials, etc. A project emergency response plan should also be in place.
• Make sure there is one dedicated employee to oversee the safety of the project from start to finish and that all other employees are involved in promoting safety too.
• Ensure that all pile driving employees have been adequately trained in safety and understand what is expected of them to prevent issues.
• Establish a location to store pertinent documents regarding safety training, inspections, hazard reports, safety permits, and incidents. Make sure all crew members are aware of where these documents are stored.
• Come up with a plan for dealing with challenges specific to marine applications, including a plan for natural disaster preparedness.

Worksite Safety Tips

• Before a project begins, a thorough safety survey of the site should be conducted to assess both current and potential risks.
• As the project is in progress, there should be a schedule in place for additional, regular safety surveys.
• Heavy equipment should be regularly inspected to make sure it’s in good, working order.
• Pile driving materials should also be regularly checked for any damage.
• Regular, scheduled maintenance should be performed on all heavy equipment, including any hammers used in pile driving.
• Barges should be regularly maintained, and clutter should be removed from barge deck on a regular basis.

Employee Reporting

• Make sure there are established systems that allow crew members to quickly and efficiently report hazards, injuries, and incidents.
• Include employees in the process of carrying out safety surveys.
• After accidents are reported, make sure a thorough investigation is performed that assesses safety vulnerabilities and results in a report of recommendations for improvement and prevention of accidents.
• Encourage employee involvement in the establishment of any new safety protocols.

Additional Tips for Proactive Safety

• Ensure that crew members have proper protective gear and are aware of how to utilize protective gear to its full benefit.
• Make sure the work schedule allows for crew members to take breaks, eat, hydrate, etc. so that no safety issues are presented due to employee exhaustion.
• Conduct emergency drills in addition to safety training to prepare crew members to act quickly in the face of the unexpected.
• Ensure that first aid equipment and supplies are stocked and easily accessible to crew members.
• Hold all supervisors and crew members accountable for their duties as they relate to safety.
• Thoroughly review and evaluate safety protocols on an annual or semi-annual basis to assess effectiveness and provide recommendations for improvement.

Ultimately, safety requirements will differ for each pile driving project. The tips listed above, however, can be applied to most marine pile driving endeavors. The more you prepare and have procedures in place to promote safety, the better. By doing everything you can to minimize risks you can save yourself a lot of trouble in the end.

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The Maryland Department of Transportation outlines specifications regarding the proper dimensions for approach plates for precast temporary concrete F-shape barriers, including general notes, plan view details, elevation details, plate anchorage details, and section A-A details.

Maryland Approach Plates for Precast Temporary Concrete F-Shape Barriers (Left and Right Sides), General Notes

The Maryland Department of Transportation’s general instructions are as follows:

1. The approach plate should be fabricated using a ½” thick steel plate that’s bent or welded to the appropriate dimensions.
2. Structural steel should conform to ASTM A 709 Grade 36 and galvanized after fabrication in conformance with ASTM A 123.
3. See Standard MD 104.01-55 for details on precast temporary 32 inch F-shape concrete traffic barrier transition right side approach, and Standard MD 104.01-57 for left side approach.
4. When the approach plate is removed, the holes in the existing barrier should be grouted.

Maryland F-Shape Barrier Approach Plate Details

Approach plates in Maryland should conform to the following dimensions and include the following features, according to the Maryland Department of Transportation’s specifications.Plan View (Right and Left Side)Right side plates should begin with a ½” gap between the plate and the barrier on the right side and expand to a 8-1/2” gap between the plate and the barrier on the left side. When measured from the end of the left side, there should be 2’-0” between the end of the plate and the flasher bracket hole. Flasher bracket holes should be 5/8” in diameter.These measurements should be mirrored (inverted equally) for the left side.Elevation View (Left and Right Side)All plate corners should be rounded before galvanizing. Plates should include two sets of six holes that are each 1” in diameter. Holes are positioned in pairs of two, with 6” (horizontally) between each pair of holes. There should be four total holes in the bottom slope of the plate, and eight total holes in the top slope of the plate.Approach Plate AnchorageApproach plate anchorages should be installed in the field to achieve proper placement and hole alignment. Approach plate anchors include 6 expansion anchors with galvanized 7/8” diameter hex head bolts. (Use the same method to anchor plates to existing barriers as you would to new barriers). There should be a 2” minimum and a 2-1/2” maximum between the end of the inserted hex head bolt and the back of the temporary precast barrier transition.Section A-ASection A-A can be shown either bent with welded stiffener plates, or welded. The difference is that when the stiffener plate is bent, there is a 7” offset of the stiffener plate, but with the welded version, there is a 6-5/8” offset. All other measurements are equal.This blog post is an interpretation of specifications by the Maryland Department of Transportation. Please consult with Maryland DOT's most recent requirements for definitive information.

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Eiffel Trading’s robust barrier wall inventory ranges from used f shape barrier wall, to used single slope barrier wall, and all types in between. Furthermore, we market a wide variety of other construction materials, including used wide flange beams, used crane mats, and much more.All of our listings are constantly being updated, but if you don’t see what you’re looking for, create a wanted listing for free.Ready to sell your used heavy equipment or construction material? List your products today for free on Eiffel Trading’s online marketplace.If you have any questions or would like additional information, please call us at 1-800-541-7998 or email sales@eiffeltrading.com.

The Maryland Department of Transportation outlines specifications regarding the proper dimensions for F-shape concrete barrier beam anchorages, including general notes, elevation view details, plan view details and section details.

Maryland F-Shape Barrier W-Beam Anchorage General Notes

The Maryland Department of Transportation’s general instructions are as follows:

1. All posts and offset brackets should be as shown on Standards MD 605.22 and MD 605.23
2. The W-beam terminal connector and W-beam section should be lapped in the direction of traffic.
3. The cost for the precast 32 inch F-shape temporary concrete traffic barrier terminal end will be paid for per each.

Maryland F-Shape Barrier W-Beam Anchorage Details

W-beam anchors in Maryland should conform to the following dimensions and include the following features, according to the Maryland Department of Transportation’s specifications.Plan ViewEach F-shape barrier includes a W-beam terminal connector (see STD. MD 104.01-48 for details). There should be a maximum of 1’-9” between the tapered end of the barrier and the center of the first W-beam anchor.There should be a maximum distance of 4’-1-3/4” between the tapered end of the barrier and the center of the second W-beam anchor, and a distance of 6’-3” between the barrier’s terminal connectors and the center of the second W-beam anchor. (This distance is an approximation, based on the location of the ¾” x 2-1/2” slots in the W-beam and terminal connector).There should be 6 anchors spaced 3’-1/2” apart from each other (for a total of 18’-9” in length). The final (seventh) anchor should be placed slightly apart from the sixth anchor at 6’-3”. Traffic should be moving towards the barrier such that vehicles pass the anchors first before passing the barrier.Elevation ViewWhen viewed from left to right, precast temporary F-shape barriers should end with a pin and loop joint (see STD. MD 104.01-53 and MD 104.01-54 for details); 26’-10-3/4” basis of payment per each for traffic barrier W-beam anchorage at precast 32” F-shape temporary concrete traffic barrier terminal end (rectangular washers required on this section).The State of Maryland instructs that when beginning standard traffic barrier W-beams, rectangular washers should not be used.Section A-AAccording to details of section A-A, 4 square steel plate washers are required (see STD. 104.01-48 for details), along with galvanized hex head bolts that are 4-7/8” in diameter. Additionally, nuts and 4 rectangular washers are required (see STD. MD 605.51-01 for rectangular washer details. This section of the barrier is 1’-6” wide and 2’-4” tall.This blog post is an interpretation of specifications by the Maryland Department of Transportation. Please consult with Maryland DOT's most recent requirements for definitive information.

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Eiffel Trading’s new and used barrier wall inventory ranges from f-shape barrier, to jersey barrier, and everything in between. Additionally, our construction material inventory also includes used sheet pile, used steel pipe, and much more.All of our listings are constantly being updated, but if you don’t see what you’re looking for, create a wanted listing for free.Ready to sell your used heavy equipment or construction material? List your products today for free on Eiffel Trading’s online marketplace.If you have any questions or would like additional information, please call us at 1-800-541-7998 or email sales@eiffeltrading.com.

The Maryland Department of Transportation outlines specifications regarding the proper dimensions for precast F-shape concrete barrier pin and loop joints, including general notes, elevation view details and plan view details.

Maryland F-Shape Barrier Pin and Loop Joint General Notes

The Maryland Department of Transportation’s general instructions are as follows:

1. Reinforcements:

a. 6x6 W2.9 x W2.9 welded wire fabric folded in a U shapeb. Two No. 4 ½” diameter reinforcement bars that are Grade 60 and each 11’-4” long

1. Concrete should be mix No. 6 (4,500 PSI)
2. 2 -SC52 – 2 ton lifting anchors
3. All barriers should have “T350” imprinted onto the top end of the barrier
4. Include a 24” wide x 1-7/8” high drain pan
5. ¾” chamfer along the top edges
6. Connector loops should be ¾” diameter rods of ASTM 709 Grade 36
7. Plain should conform to ASTM A 153

Maryland F-Shape Barrier Pin and Loop Joint Details

The pin and loop joints of precast concrete barriers in Maryland should conform to the following dimensions and include the following features, according to the Maryland Department of Transportation’s specifications.Elevation ViewWhen observing the barrier at an elevation view, the lower connector loop (on the right side) should protrude from the bottom of the barrier 2” above the ground line; the distance between the lower connector loop (right side) and the upper connector loop (right side) should be 1’-6”; the distance between the upper connector loop (right side) and the top of the barrier should be 8”. There should be a 2” lip at the bottom of the barrier, from which the lower connector loop protrudes.When observing the barrier at an elevation view, the lower connector loop (on the left side) should protrude 4” from the ground line; the distance between the lower connector loop (left side) and the upper connector loop (left side) should be 1’-6”; the distance between the upper connector loop (left side) and the top of the barrier should be 6”.Connector LoopsConnector loops should protrude 2-1/4” out from the barrier; each loop should have a 7/8” interior radius. The “flat side” or “face” of the loop should be facing downwards (in other words, connector loops should be positioned so that connector pins can be inserted vertically).End ViewWhen observing the barrier from an end view, connector loops should be horizontally centered on the barriers. When measured from the center of each loop, there should be a 1’-0” distance from the center of the loop to the outside (bottom) of the barrier.This blog post is an interpretation of specifications by the Maryland Department of Transportation. Please consult with Maryland DOT's most recent requirements for definitive information.

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Eiffel Trading boasts a wide range of new and used barrier wall types for sale, including f-shape barrier, single slope barrier, k-rail barrier, and more. Furthermore, our construction material inventory also includes used sheet pile, new and used steel plates, used HDPE pipe, and more.All of our listings are constantly being updated, but if you don’t see what you’re looking for, create a wanted listing for free.Ready to sell your used heavy equipment or construction material? List your products today for free on Eiffel Trading’s online marketplace.If you have any questions or would like additional information, please call us at 1-800-541-7998 or email sales@eiffeltrading.com.

Steel sheet piles often play an important part in marine construction, particularly the construction of foundations for marine structures. Unfortunately, the use of sheet piles in areas where they are exposed to either salt or fresh water can be a recipe for corrosion. When the piles are exposed to wet soil, immersed in water, or are frequently splashed with water, steps should be taken to help prevent corrosion and to monitor corrosion levels as it develops.Below are some suggestions for protecting sheet piles in marine environments:

• Regular inspections of sheet piles should be scheduled and performed to detect any development of corrosion. Corrosion levels should be recorded, and sheet piles should be attended to if they reach beyond a pre-established level of corrosion that may compromise the marine structure.
• Anti-corrosive coatings are a top protective solution. Coal tar epoxy coating, glass flake epoxy coating, duplex coating systems, and hot dip galvanization are all popular options to help prevent corrosion.
• The use of thicker sheet piles or thicker sections of sheet piles can help prevent corrosion. Supplemental steel plates can also be welded onto sheet piles that develop corrosion to increase their strength and prevent further corrosion.
• Structural design to help eliminate bending in marine areas where corrosion is common doesn’t necessarily prevent corrosion, but it does help extend the functional life of the sheet piles regardless.
• An extension of concrete capping beam below any low water levels can also be useful to help stop corrosion in its tracks.
• Sheet piles with a mild or moderate amount of corrosion can be pressure washed to remove corroded layers. Additionally, sheet piles can be pressure washed on a regular basis as a part of general maintenance and corrosion protection.
• If sheet piles are going to be permanently immersed in water, the use of particular steel grades like AMLoCor and ASTM A690 can be helpful. ASTM A690 sheet piles are considered “mariner-grade” steel because they are a composite of steel, nickel, and copper, which makes them naturally anti-corrosive.
• Cathodic protection is another viable solution. It can be either provided by sacrificial anodes or by impressed current. It offers quite a bit of protection for sheet piles that are in constant contact with sea water or fresh water. Cathodic protection can be added to sheet piles after they are installed if corrosion is detected.
• Sheet piles should always be monitored for pitting corrosion in addition to regular corrosion. Luckily, pitting corrosion does not usually affect the overall stability of the structure or retaining wall involved. Duplex coating, which is a combination of hot tip galvanization and epoxy coating, is particularly beneficial in preventing pitting corrosion.
• Keep in mind that when sheet piles are used in sea water, the greatest level of corrosion is usually found in the low water zone or the splash zone. The low water zone, in particular, often causes the most problems. Because of this, coating or cathodic protection should be applied to areas that are roughly 5 feet to 8 feet beneath the mean low water.

OVERALL

Sheet piles are fairly resilient and can easily stand the test of time in most areas where they are used. If employed in marine areas, the tips above help extend their usable life. If you purchase sheet piles used, make sure to carefully inspect them for corrosion from previous use and to treat them with coatings or cathodic protection if you know you’re going to be using them in marine environments where corrosion is possible.

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Eiffel Trading’s online marketplace boasts a wide variety of piledriving materials, including used sheet pile, used steel pipe, new and used wide flange beams, and more. Additionally, our marine equipment inventory ranges from spud barges, to deck barges, and everything in between.All of our listings are constantly being updated, but if you don’t see what you’re looking for, create a wanted listing for free.Ready to sell your used heavy equipment or construction material? List your products today for free on Eiffel Trading’s online marketplace.If you have any questions or would like additional information, please call us at 1-800-541-7998 or email sales@eiffeltrading.com.

The Idaho Transportation Department outlines specifications regarding the proper dimensions for precast concrete barriers, including general notes, plan details, and pin details.

Idaho Precast Concrete Barrier Notes

The Idaho Transportation Department’s general instructions are as follows:

1. The precast concrete barrier described is a MASH Test level 3 longitudinal barrier system. The barrier uses the F-shape cross section.
2. Precast using class 50AF concrete. Chamfer top, bottom and edges at ¾”. Provide a 2” minimum concrete cover over reinforcing steel. A 2” white PVC sleeve may be used to form the lifting hole. If used, leave the PVC sleeve in place.
3. Pin connect barrier units. Precast concrete barriers may be angled approximately 7 degrees at connections.
4. Provide the calculated length of need upstream from hazards and provide at least three precast concrete barrier segments downstream of hazards. Do not install fewer than six barrier segments.
5. The precast concrete barrier can be installed free-standing or anchor pinned to pavement.

a. If free-standing, anchor the two barrier segments nearest the end (not counting a concrete barrier termina) with anchor pins as described in note 5b.b. If anchor pinned, use two pins in each barrier segments installed on concrete pavement and use three pins in each barrier segment installed on asphalt pavement. If anchor pinned in a median, install anchor pins on both sides of the barrier (four total on concrete pavement, six total on asphalt pavement). Pre-drill anchor pin holes in concrete pavement using the slot as a guide.

1. When transitioning from freestanding to anchor pinned barrier, install one anchor pin in the slot of the last freestanding segment closest to the first anchor pinned segment.
2. When transitioning from freestanding barrier to rigid barrier, such as cast in place concrete barrier or bridge rail, transition first to anchor pinned precast barrier, then to the rigid barrier. Cut off the end loops of the last segment of the precast barrier in the F-shape to single slope transition.
3. When transitioning from freestanding barrier to W-beam guardrail, anchor pin the last three precast concrete barrier segments and connect to a guardrail transition. Chamfer the last 3-1/2 inches of the barrier and drill give 1” diameter holes as shown.
4. Flare the upstream end of the barrier in accordance with the concrete barrier shy-line offset and flare rate table.
5. Terminate the barrier with a crashworthy end treatment or transition to another barrier system. Acceptable end treatments include tapering the barrier outside of the clear zone, transitioning to W-beam guardrail, a crash cushion, a precast concrete barrier terminal, or transition to a bridge rail or parapet. When connecting the F-shape precast concrete barrier to a New Jersey shape precast concrete barrier, use the F-shape to New Jersey shape transition.

Idaho Precast Concrete Barrier Plan Details

Precast concrete barriers in Idaho should conform to the following dimensions and include the following features, according to the Idaho Transportation Department’s specifications:Elevation View

• Length: 12’-6”
• Two lifting slots that are each 12” long; each slot should be spaced 31-1/2” from the end of the barrier
• There should be three loop pins protruding from each side of the barrier
• On the left side of the barrier, the loop pins should be spaced as follows: 6” between ground and bottom loop pin; 4” between bottom loop pin and middle loop pin; 14” between middle loop pin and upper loop pin; 8” between upper loop pin and top of barrier; these measurements should be inverted for the loop pins on the right side of the barrier

Section A-A

• Bottom width: 24”
• Top width: 9-1/2”
• Height: 32”
• Bottom slope: 40 degree angle
• Break point: 10”

Section B-B

• Bottom width: 24”
• Top width: 9-1/2”
• Height: 32”
• Chamfer: ¾”
• 10” R
• Vertical reveal: 3”

Section C-C

• Bottom width: 24”
• Top width: 9-1/2”
• Height: 32”
• Chamfer: ¾”
• 10” R
• Bottom slope: 40 degree angle
• Vertical reveal: 3”

Idaho Precast Concrete Barrier Pin and Connector Details

Precast concrete barrier pins and connectors in Idaho should conform to the following dimensions and include the following features, according to the Idaho Transportation Department’s specifications:Anchor PinsAnchor pins should include be 48” long for asphalt and 21-1/4” long for concrete. Pins should include a 2” beveled end on one end, and a plate washer on the opposite end. Plate washers should be 4” x 4” wide, ½” thick and include a central hole that is 1-5/8” in diameter.Connecting PinsConnecting pins should measure 29” long with an additional 1” thread at one end and a tapered point at the other end. Connecting pins should measure 1” in diameter (ASTM A449). Pins should include a 2” diameter circular ASTM A572 washer at 1/8” thickness (minimum).

Idaho Reinforcing Steel Table

Reinforcing steel should conform to the following table, according to the Idaho Transportation Department’s specifications:This blog post is an interpretation of specifications by the Idaho Department of Transportation. Please consult with Idaho DOT's most recent requirements for definitive information.

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