Tips & Advice Posts

The Colorado Department of Transportation outlines specifications regarding the details for the stabilization of permanent or temporary pinned precast type 7 concrete barriers, including general notes, a plan view of S bar ends, an elevation view with stabilization pin details, and stabilization pin details.

Colorado Precast Type 7 Concrete Barrier Stabilization General Notes

1. Pins should be hot-dipped galvanized after fabrication.
2. For terminal anchoring of the permanent installation of precast type 7 concrete barrier, refer to the end anchorage detail on standard plan M-606-13, sheet 1, which is provided by the Colorado Department of Transportation.
3. An optional 3 inch maximum tapered end point may be included on the stabilization pin to facilitate driving.

Colorado Precast Type 7 Concrete Barrier Plan View of S Bar Ends

According to the Colorado Department of Transportation plan view of S bar ends, precast type 7 concrete barriers should include the following features and conform to the following dimensions:

• One #4 S bar included at each barrier end
• 12” between the end of the barrier and the center loops of the S bars
• S bar loops (when measured from the outside of the looped ends) should be 2-1/2” long (typ.) and 1-1/2” in diameter
• S bars should be 16-1/4” long when measured in total from end to end; each outer leg should be 12-1/2” long
• The barrier should include a 12:1 taper (typ.) at each S bar end

Colorado Precast Type 7 Concrete Barrier Elevation View with Pins

According to the Colorado Department of Transportation elevation view with pins, precast type 7 concrete barriers should include the following features and conform to the following dimensions:

• Length: 13-1/2”
• Distance between ground line and first #4 S bar: 4”
• Width between the end of the S bar and the side of the barrier: 4-3/4”
• Diameter of bars: 1” (typ.)
• Recess to be 3” width (typ.)
• Fill recess with grout after placing pin
• A stabilization pin is required through the barrier surfacing into the subgrade. Drilled holes are required for concrete pavement. Use two pins for each end in each unit.
• Form a hole for the pin with 1-1/2” O.D. PVC plastic pipe (which is to be left in place)

Colorado Precast Type 7 Concrete Barrier Stabilization Pin Details

According to the Colorado Department of Transportation stabilization pin details, precast type 7 concrete barrier stabilization pins should include the following features:

Stabilization Pin

This description is for ASTM A 36 steel pins.Pins should include a 2-1/2” diameter plate that is 3/8” thick. The plate should be placed 3/8” from the top of the pin. The diameter of the pin should be 1” and should be hot-dipped galvanized after fabrication. The pin length will vary based on the road surface, as described in the table below.This blog post is an interpretation of specifications by the Colorado Department of Transportation. Please consult with Colorado DOT's most recent requirements for definitive information.

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s online marketplace hosts a plethora of precast concrete barrier wall listings of various types, including k-rail barrier wall, single slope barrier wall, and many more. Furthermore, our construction material inventory also includes used crane mats, new and used steel plates, 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.

The Colorado Department of Transportation outlines specifications regarding the proper dimensions for precast type 7 barriers, including general notes and specifications.

Colorado Precast Type 7 Concrete Barrier General Notes

1. All steel reinforcing should be 2 inches clear of the nearest surface of concrete unless otherwise shown. Reinforcing steel should be Grade 40 minimum.
2. Concrete should be Class D.
3. All permanent precast barriers used to replace other concrete barriers should be in new condition, undamaged and with no repairs.
4. For temporary installations, install with a minimum of 4 feet distance from the centerline of the concrete barrier to any obstructions behind it. For temporary installations with less than 4 feet minimum distance, stabilization pins should be used on each barrier unit adjacent to, and within 10 feet of both sides of the obstruction.
5. The flare rate for temporary installations should be 10:1 or flatter unless otherwise approved by the engineer.
6. Stabilization pins should be used to anchor each 10 foot unit in all permanent installations.
7. The month and year that the precast type 7 concrete barrier was manufactured should be molded into one end of each 10 foot barrier unit.
8. Approved non-shrink grout should be used for grouting over all pins and grouting of scuppers.
9. When hydraulic analysis allows, scupper may not be needed on:

a. Median installation with inlet drainage.b. Shoulder barrier on high edge of a superelevated shoulder.c. Median barrier on a crest vertical curve.d. Permanent barrier, if specific on plans.

1. All incidental work and materials such as connecting pins, anchors, bolts, grout and excavation for end anchorage will not be paid for separately, but should be included in the work.
2. One-inch diameter threaded inserts may be cast in place to facilitate lifting for temporary barrier applications only.
3. Retroreflectorization is required on barriers.

Colorado Precast Type 7 Concrete Barrier General Notes

According to the Colorado Department of Transportation elevation view details, precast type 7 concrete barriers should include the following features and conform to the following dimensions:

• Height: 34”
• Loop bars: ¾” diameter; loop bars should protrude by 2” from the end of the barrier; on the right side, there should be 14” between the end of the lower loop bar and the end of the middle loop bar, and 4” between the end of the middle loop bar and the end of the upper loop bar; these dimensions should be flipped for the left side
• 1” chamfer or radius on each face.
• Two 3” x 12” scuppers
• 28” between the end of each scupper and the end of the barrier
• Four 9’-4” #5 bars

For more information specifically regarding Colorado type 7 barrier wall with pin and loop connections, check out our recent blog post.This blog post is an interpretation of specifications by the Colorado Department of Transportation. Please consult with Colorado DOT's most recent requirements for definitive information.

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s precast barrier wall inventory includes used low profile barrier wall, used single slope barrier wall, and much more. Additionally, our other construction material inventory ranges from used crane mats, to used sheet pile, and every option 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 Colorado Department of Transportation outlines specifications regarding the proper dimensions for precast type 7 barrier pins and loops, including general notes, elevation view details, joint style details, and more.

Colorado Precast Type 7 Concrete Barrier Pin and Loop General Notes

1. Washers should be forged as an integral part of the pin, or should be welded as described below.
2. Pins should be hot-dipped galvanized after fabrication.
3. If an alternative top configuration is used for lifting, the lifting pin should be provided. Pins should conform to critical dimensions (pin length diameter).
4. Pins should conform to ASTM A449.
5. Approved non-shrink grout should be used for grouting over all pins, and grouting of scuppers.
6. Joints between cast in place guardrail type 7 and permanent installation precast type 7 concrete barriers should include all regresses and loops in the cast in place end, along with the pin to complete the typical precast type 7 concrete barrier joint.

Colorado Precast Type 7 Concrete Barrier Pin and Loop Plan Details

Plan View DetailsAccording to the Colorado Department of Transportation plan view details, precast type 7 concrete barrier pins and loops should include the following features and conform to the following dimensions:

• Clearance between panels: ½”
• ¼” chamfer
• Two ¾” diameter loop bars running horizontally through the center of each panel
• Two pinning assembly configurations in each panel that will mirror each other when the panels are joined together.

Connecting Pin Details

Connecting pins should be 30” long plus or minus 1/8”. The threading is not included in this number; threading should be 1-1/2” long. There should be a 2” or 2-1/4” diameter circular washer (with a 1/8” minimum thickness) set onto the threading, which should rest where the threading ends and the bar begins. Pins should be 1” in diameter. The bottom ½” of the pin may be beveled to facilitate placement.

Alternative Pin Details

According to the Colorado Department of Transportation alternative pin details, pins should be 1” in diameter and hot-dipped galvanized after fabrication. Pins should be 30” long below the washer (plus or minus 1/8”) and 1” high above the washer. Washers should be 1/8” thick.

Colorado Precast Type 7 Concrete Barrier Pin and Loop Elevation Details

According to the Colorado Department of Transportation elevation view details, where two panels are joined together, there should be a connecting pin that is “shown partially in place,” which is protruding from the top of the spot where the panels join. Furthermore, there should be “grout over the connecting pin.”

Colorado Precast Type 7 Concrete Barrier Pin and Loop Joint Style Details

1. A 1” x 12” taper is required at the bottom of all four corners of the barrier sections to eliminate snagging of snowplow blades. The taper is optional on permanent installations.
2. The horizontal slots should be 1-1/2” in depth at the center of the barrier and may decrease in depth at the edge of the barrier due to the 24:1 taper.
3. There should be a 2-1/2” diameter x 2” vertical recess for the top of the connecting pin.
4. There should be a 1-1/2” horizontal x 2” high horizontal slot for loop from the other barrier section.
5. There should be a 1-1/2” maximum diameter central slot to receive connecting pins.

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

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s barrier wall inventory ranges from used f-shape barrier, to used jersey barrier, and everything in between. Additionally, we host a wide variety of equipment listings, including but not limited to used spud barges, used cranes and gantries, and so 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 Arkansas State Highway Commission outlines specifications regarding the proper placement for precast barriers, including general notes, barrier placement along a bridge with offset, placement along a road with offset, attenuator details and special end unit details.

Arkansas Temporary Precast Barrier General Notes

When shown on the Plans, the ends of the Temporary Precast Concrete Barrier should be protected with an NCHRP-350 or Manual for Assessing Safety Hardware (MASH) approved Crash Cushion. Payment for Crash Cushions shall be made under the item of "Temporary Impact Attenuation Barrier."Barriers should be doweled to the pavement when the distance between the barrier and the nearest road edge is less than 4’-0” and theheight of the road edge “lip” is greater than 24”.

Arkansas Barrier Placement Along Bridge with Offset

Cut line: A cut line of four feet or greater is preferred. If less than 4 feet, precast units should be connected to the slab.Special End Unit: The distance between the bridge end and the start of the special end unit should be no less than 40’.Delineators: Delineators should be set at 10’ spacing (typ.).Taper rate: The taper rate between the bridge end and the special end unit should be 10:1.Offset Distance: Offset distances depend on the speed of traffic, as follows:

• If speed is less than or equal to 45 mph, offset distance should be 12 feet
• If speed is greater than 45 mph, offset distance should be 18 feet
• If offset distance is not attainable, then barriers should be place with attenuators

Arkansas Barrier Placement Along Road with Offset

Taper rate: The taper rate leading up to the special end unit should be 10:1.Special End Unit: The distance between the start of the taper and the special end unit should be no less than 40’.Delineators: Delineators should be set at 10’ spacing (typ.).Offset Distance: Offset distances depend on the speed of traffic, as follows:

• If speed is less than or equal to 45 mph, offset distance should be 12 feet
• If speed is greater than 45 mph, offset distance should be 18 feet
• If offset distance is not attainable, then barriers should be place with attenuators

Arkansas Barrier Placement with Attenuator

Temporary impact attenuation barriers should be placed at the end of the special unit. Offset distances should be applied for two way traffic only. There should be a minimum of 3’-0” from the edge of the travel lane to the nearest edge of the attenuator.

Special End Unit Details

Each end unit should conform to the following dimensions and include the following features:

• Height: 2’-8”
• Top Width: 1’-0
• Two (2) ¾” diameter steel bars space 9” apart from each other running vertically through the center of the end unit
• 1-1/2” diameter hole for a 1” drift pin, spaced 1’-6” from the end of the unit
• 2-#5 bars running horizontally through the unit

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

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s online marketplace hosts a wide variety of barrier wall options, including but not limited to single slope barrier wall, f-shape barrier wall, and k-rail barrier wall. Additionally, our equipment inventory ranges from used spud barges, to used vibratory hammers, 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.

Crane access trestles allow cranes to get to areas that are ordinally difficult to reach. Made of steel sheet pile, steel pipe, and other materials, they offer a platform for doing work that’s sturdy and stable, and they allow for minimal disruption to the environment. When it comes to marine construction, they’re a great alternative to barges for creating a platform for heavy equipment. They’re particularly useful for large bridge construction, ocean outfall construction, and the building of shoreline marine structures. Crane access trestles have played an important role in several major bridge construction projects in recent years, including the construction of the New NY Bridge and the Tappan Zee Bridge.

BENEFITS

Crane access trestles reduce the necessity of dredging, which translates to less disruption to river ecology and ultimately less disruption to construction projects by speeding up their timelines. Trestles reduce the need for dredging by allowing heavy machinery to be operated over shallow water. Since it is difficult for barges to maneuver in shallow areas of water without dredging intervention, crane access trestles offer a viable and logical solution, ultimately replacing the need for barges and eliminating the need for dredging. Since dredging can only happen during certain months in some areas, waiting for an area to be dredged can slow things down significantly.

BULKHEADS

Sometimes crane access trestles are bolstered by bulkheads, which helps prevent shorelines from coastal erosion. The bulkheads serve as walls that keep the soil back and prevent it from being carried out into the water. This ultimately aids in stabilizing the shore that surrounds the trestles.Crane access trestles can often support up to 250-ton cranes as well as other equipment. These trestles often lower the number of trucks carrying equipment that have to travel through areas that surround construction. Crane access trestles are only accessible by boat once installed in most cases. A typical installation of crane access trestles might extend 1,000 feet from the shoreline, and it would be situated parallel from the marine structure under construction.

PILING

Steel pipe pile is an essential component to the foundation of most crane access trestles. Pipe piling between 24” and 40” is typical. The size of piling in terms of both thickness and length depends on how much support the crane access trestles need to provide based on factors like the weight of equipment as well as the soil conditions. Once the trestles are constructed, made up of individual piling components, they frequently span several hundred or over a thousand feet.

USED CRANE ACCESS TRESTLE

Although new crane access trestles are often customized to particular projects, once those projects are complete, trestles can easily be applied to other projects. Buying used crane access trestles can save your project some money. It’s imperative, though, to make sure a project engineer verifies that particular trestles will work for your particular projects and your equipment before you make any investments. When used crane access trestles are listed for sale, the weight of equipment they can support is usually mentioned in product descriptions. Sometimes simple adjustments to crane girder spacing can allow you to re-purpose used crane access trestles, particularly if trestles were initially designed for particular types of equipment and you’d like to use equipment of different dimensions (but similar weights) on them.

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s online marketplace boasts not only crane access trestle, but a wide variety of new and used construction materials including used crane mats, used HDPE pipe, and more. Furthermore, our equipment inventory ranges from used foundation equipment, to used barges, 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 Alabama Department of Transportation outlines specifications regarding the proper dimensions for 350, TL-3 previously cast concrete barriers, type 6A (for use with approved impact attenuator systems), including general notes, elevation view specifications, plan view specifications, barrier section details, connector pin assembly details and lift hook details.

Alabama 350-TL Barrier General Notes

1. This information refers to barriers cast prior to 1.01.2020. Barrier cast after this date should be MASH compliant. There will be an interim phase-in period for the new barrier during which this old barrier will be allowed. The MASH, TL-3 barrier and previously cast barrier are not interchangeable and should not be mixed in a continuous run of barriers.
2. Supply one connector pin assembly with each 10’ barrier section.
3. The contractor is responsible for checking the tightness of the 11#4” hex nut at both ends of the 11#4” diameter bolt to ensure that no hex nut comes loose during the duration of its use on the project.
4. All barrier segments should be marked as shown: ALDOT, 350-TL, number and year cast. The markings should be permanently impressed in the barrier using a minimum of 2” high lettering.
5. Barriers should initially be placed close together (closed joint) so that the pin can be easily inserted through the hinge bar loop. The barriers should then be opened (open joint) before the nut is tightened on the pin.

Alabama 350-TL Barrier Elevation View Specifications

350-TL barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT elevation view specifications:

• Length: 10’
• Height: 32’
• Drainage and lifting slot: 4’ long and 2” high; 3’-0” between the end of the lifting slot and the edge of the pane; the drainage slot should be centered on the panel
• Two #5 lift hooks, each protruding 3” from the top of the barrier; 2’-6” between the edge of the panel and the center of each lift hook
• One ¾” diameter hinge bar on the left side of the panel; 8-1/2” between the bottom of the panel and the bottom of the lift bar; 8-1/2” between the top of the panel and the top of the lift bar; 15-3/4” between each protruding end of the hinge bar

Alabama 350-TL Barrier Plan View Specifications

350-TL barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT plan view specifications:

• Width: 24”
• Length: 10’-0”
• ¾” chamfer

Alabama 350-TL Barrier Section A-A, B-B, C-C and D-D Specifications

350-TL barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT specifications.Section A-A

• Width: 24”
• Height: 32”
• Distance between groundline and lowermost bar: 4-1/2”
• Distance between lowermost bar and middle bar (BAR B #5 REINF BAR): 13-1/2”
• Distance between middle bar (BAR B #5 REINF BAR) and uppermost bar (BAR B #5 REINF BAR): 11-1/2”
• Distance between uppermost bar (BAR B #5 REINF BAR) and top of the panel: 2-1/2”
• Section should be symmetrical in nature

Section B-B

• Width of bottom of panel: 24”
• Breakpoint: 10”
• Upper slope height: 19”
• Width of top of panel: 6”
• ¾” chamfer or radius
• Section should be symmetrical in nature

Section C-C

• Width: 24”
• Height: 32”
• Distance from top of panel to midpoint: 1’-0”
• Section should be symmetrical in nature

Section D-D

• Width: 24”
• Height: 32”
• Distance from top of panel to midpoint: 9”
• Incline on each side: 3”
• Section should be symmetrical in nature

Alabama 350-TL Barrier Connector Pin Assembly Details

350-TL barrier connector pins in Alabama should include the following features, according to the ALDOT specifications:

• Pin – AASHTO M314 Grade 36 (minimum)
• Alternate hex head machine bolt – ASTM A307 Grade A
• Nut – ASTM A536 Grade A heavy hex
• Washer – ASTM F436 Type I
• All components must be hot dip galvanized and ASTM A153

Alabama 350-TL Barrier Lift Hook Details

350-TL barrier lift hooks in Alabama should include the following features, according to the ALDOT specifications:

• #4 rebar AASHTO M31 Grade 40 or 60 or ASTM A615 Grade 40 or 60 or ½” 250 or 270 KSI steel strand uncoated
• Seven-wire for concrete reinforcement – AASTHO M203 or ASTM A416
• Two required per curb section

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

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s barrier wall inventory is wide-reaching and features a multitude of new and used barrier types, including used single slope, used f-shape, and much more. In addition, our construction equipment inventory ranges from foundation eqiupment, to cranes, 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 Alabama Department of Transportation outlines specifications regarding the proper dimensions for 350 TL-3 previously cast concrete barriers (type 6, bolted through a bridge deck, portable), including general notes, elevation view specifications, details for barrier sections A-A, B-B and C-C, and more.

Alabama 350 TL-3 Previously Cast Concrete Barrier General Notes

1. All deck spalls that occur as a result of drilling through the deck in order to install anchor bolts or as a result of removing anchor bolts once temporary barriers are removed should be repaired to the satisfaction of the engineer. Proposed materials and methods to be used in making these repairs should be submitted to the engineer for approval. All costs associated with repairing spalled concrete in bridge deck should be considered a subsidiary obligation of pay item, 726-A, portable concrete safety barrier, type 6.
2. If the barrier is to be positioned such that a girder prevents bolting through the bridge deck, then anchor bolts should be installed in accordance with procedure provided in the details below. If the traffic side bolt cannot be bolted through the deck due to grider, then both sides of the barrier should be bolted.
3. All holes drilled through the bridge deck should be filled with an approved epoxy grout after removal of the temporary barrier. If the anchor bolt was drilled and epoxied, the remaining anchor bolt should be cut below the top of the deck and filled with an approved epoxy.
4. All costs for materials, equipment, tools, labor and incidentals to install and remove anchors and to patch the deck with epoxy grout should be included in the unit price bid for pay item 726-A, portable concrete safety barrier, type 6.
5. Alternate NCHRP 350, TL-3, portable barrier designs that have been approved by the ALDOT product evaluation board may be considered for use through submittal to the state construction engineer in accordance with section 740.02 c 3 of the ALDOT Standard Specifications for Highway Construction, 2018 edition.

Alabama Previously Cast Concrete Barrier Elevation View Specifications

Previously cast concrete barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT elevation view specifications:

• Length: 10’
• Height: 32”
• Two lift hooks, each protruding 3” from the top of the barrier
• One loop bar on the right with a ¾” diameter hinge; the top of the loop bar should protrude 7-3/8” from the top of the barrier, and the bottom of the loop bar should protrude 9-3/8” from the ground line.
• One loop bar on the left with a ¾” diameter hinge; the top of the loop bar should protrude 8-1/8” from the top of the barrier, and the bottom of the loop bar should protrude 8-1/8” from the ground line.
• Two drainage and lifting slots that are each 1’-0” long, positioned 2’-0” away from each other; the beginning of each draining lifting slot should be 3’-0” from either end of the barrier. The lifting slot should be 2” high.

Alabama Previously Cast Concrete Barrier Section A-A, B-B and C-C

Sections A-A, B-B and C-C should conform to the following dimensions and include the following features:Section A-A

• Height: 32”
• Bottom length: 24”
• Distance from bottom Bar B #5 to the center of the panel: 6”
• Height from Bar B #5 to Bar A #3: 12-1/2”
• Height from Bar A #3 to top Bar B #5: 11-1/2”
• Height from top Bar B #5 to the top of the panel: 2-1/2”

Section B-B

• Height: 32”
• Bottom length: 24”
• Top length: 6”
• ¾” chamfer or radius at top
• Break point: 13” from ground line
• Height of bottom slope: 10”
• Height of top slope: 19”

Section C-C

• Bottom length: 24”
• One anchor bolt blockout located on either side of the panel
• Bolt should be installed on traffic side only unless shown otherwise on the plans
• ½” x 3” x 3” square washer with heavy hex nut used as an anchor bolt; 2” diameter hole in the barrier; 1-1/2” diameter hole in the deck; 1-1/8” A307 hex head anchor bolt
• 2” minimum between the end of the barrier and the edge of the deck
• 6” loop bar on each side

Alabama Previously Cast Concrete Barrier Optional Threaded Bolt for Drilled and Epoxy

Optional threaded bolt for drilled and epoxy should conform to the following dimensions:

• 1-1/2” diameter hole in deck
• Inserted 7-1/2” deep
• 2” diameter hole in the barrier
• 1-1/8” A-307 threaded bolt with heavy hex head nut and washer
• Filled with grout beginning 1-1/2” below the top of the deck

Alabama Previously Cast Concrete Barrier Bar Bending Details

Stirrups located inside the barrier include three curves that should each be bent to encompass a 2-1/2” diameter. Each side of the upper portion of the stirrup should be bent at a 12-degree angle, while the outside bend should be at a 151 degree angle.This blog post is an interpretation of specifications by the Alabama Department of Transportation. Please consult with Alabama DOT's most recent requirements for definitive information.

BUY AND SELL WITH EIFFEL TRADING

Eiffel Trading’s precast concrete barrier wall inventory ranges from used low profile barrier, to used single slope barrier, to used jersey barrier. Furthermore, our marine equipment inventory includes used sectional barges, used tug boats, and so 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 Alabama Department of Transportation outlines specifications regarding the proper dimensions for previously cast concrete barriers, type 6 (portable), including general notes, elevation view specifications, connector pin assembly, section A-A and B-B specifications, hex head machine bolt details, lift hook details and joint connector details.

Alabama Previously Cast Concrete Barrier General Notes

1. All information included below applies to barriers cast prior to 1/01/2020. Barriers cast after this date should be MASH compliant. There will be an interim phase-in period for the new barrier, during which this old barrier will be allowed. The MASH, TL-3 barrier and previously cast barriers are not interchangeable and should not be intermixed in a continuous run of barriers.
2. Supply one connector pin assembly with each 10’ barrier section.
3. The contractor is responsible for checking the tightness of the 1-1/4” hex nut at both ends of the 1-1/4” diameter bolt to ensure that no hex nut comes loose during the duration of its use on the project.
4. Fluorescent reflectors (6” x 6”, ASTM Type XI reflecting sheeting mounted on flatsheet blanks) should be attached to the top of the barrier at intervals not greater than 40 feet in longitudinal sections and 20 feet in tapered sections. The reflective color should match the adjacent traffic stripe color. The reflectors should be mounted approximately two inches above the top of the barrier and should be attached to the barrier with adhesive or by a drilled-in anchor type device. If the barriers are used in a two=-way traffic situation, then the reflectors should be installed for both directions of traffic. Cost of the reflectors and mounts should be a subsidiary obligation of the concrete barrier, Type 6.
5. All barrier segments should be marked as shown: ALDOT, 350, TL-3 and Year Cast. The markings should be permanently impressed in the barrier using a minimum of 2” high lettering.
6. Barriers should initially be placed closed together (closed joint) so that the pin can be easily inserted through the hinge bar loop. The barriers should then be opened (open joint) before the nut is tightened on the pin.
7. All deformed reinforcing bars should be Grade 40 or 60 AASHTO M31 or ASTM A615.
8. Alternate NCHRP 350, TL-3 portable barrier designs that have been approved by the ALDOT product evaluation board may be considered for use through submittal to the state construction engineer in accordance with section 740.02(c) 3 of the ALDOT Standard Specifications for Highway Construction, 2012 Edition.

Alabama Previously Cast Concrete Barrier Elevation View Specifications

Barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT end view specifications:

• Length: 10’
• Height: 32”
• Two lift hooks, each protruding 3” from the top of the barrier
• One loop bar on the right with a ¾” diameter hinge; the top of the loop bar should protrude 7-3/8” from the top of the barrier, and the bottom of the loop bar should protrude 9-3/8” from the ground line.
• One loop bar on the left with a ¾” diameter hinge; the top of the loop bar should protrude 8-1/8” from the top of the barrier, and the bottom of the loop bar should protrude 8-1/8” from the ground line.
• One drainage and lifting slot that is 4’-0” long, centered on the barrier. Each end of the lifting slot should be positioned 3’-0” from each edge of the barrier. The lifting slot should be 2” high.
• No. 5 Bar A positioned horizontally at the bottom of the panel and no. 5 Bar B positioned horizontally at the top of the panel
• No. 3 Bar A positioned vertically throughout the panel, spaced at the following intervals from left to right, starting at the end of the panel: 6”, 6”, 6”, 1’-7”, 1’-7”, 1’-7”, 6”, 6”, 6”

Alabama Previously Cast Concrete Barrier Connector Pin Assembly

Connector pin components should meet the following material specifications:

1. Pin-AASHTO M314 Grade 36 Minimum
2. Alternate hex head machine bolt – ASTM A307 Grade A
3. Nut – ASTM A563 Grade A Heavy Hex
4. Washer – ASTM F436 Type I
5. All components must be hot dip galvanized – ASTM A153

Alabama Previously Cast Concrete Barrier Section A-A Specifications

Barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT Section A-A specifications:

• Height: 32”
• Bottom length: 24”
• Top length: 6”
• Reflector positioned on top
• Reflector dimensions: 6” x 6”
• Bar B #5 REINF BAR located inside the barrier
• Bar A #3 REINF BAR located inside the barrier

Alabama Previously Cast Concrete Barrier Section B-B Specifications

Barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT Section B-B specifications:

• Height: 32”
• Bottom length: 24”
• Top length: 6”
• Drainage slot height: 3”
• ¾” top chamfer or radius
• Break point: 13” from ground line
• Height of top slope: 19”
• Height of bottom slope: 10”

Alabama Previously Cast Concrete Barrier Hex Head Machine Bolt Details

Hex head machine bolts should conform to the following dimensions:

• Length: 2’-0”
• 1-1/4” diameter
• 1-1/4” washer on each end
• 1-1/4” heavy hex nut on the outside of the washer on each end
• 5” threading for threaded bolt and 6” for machine bolt

Alabama Previously Cast Concrete Barrier Lift Hook Details

Lift hooks should conform to the following dimensions:

• Height: 2’-1-1/4”
• Bottom width: 18”
• Length of each bottom side: 7”
• Length of central space: 4”
• Loop radius: 2”
• Made from #4 rebar-AASHTO M31 Grade 40 or 60; or ASTM A615 Grade 40 or 60 or:

o ½” 250 or 270 KSI steel strand uncoatedo Seven-wire for concrete reinforcement: AASHTO M203 or ASTM A416o Two required per curb section

Alabama Previously Cast Concrete Joint Connection Details

Joint connections should conform to the following dimensions:Open Joint

• Max gap: 1-3/4”
• ¾” diameter hinge bar
• 2” radius cast into the end of the barrier
• 1-1/4” diameter central high strength bolt

Closed Joint

• Max gap: ¼”
• ¾” diameter hinge bar
• 1-1/4” diameter central high strength bolt

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

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Our online marketplace boasts a wide variety of used barrier wall types, including k-rail barrier wall, f-shape barrier wall, single slope barrier wall, and much more. In addition, we have a wide variety of used marine equipment items for sale, including used deck barges, used work boats, 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.

The Alabama Department of Transportation outlines specifications regarding the proper dimensions for F-shape barriers, including general notes, elevation view specifications, end view specifications, reflector details, J-J hook details, and more.

Alabama F-Shape Barrier General Notes

1. J-J hook barrier, MASH test level III is approved for 12 foot lengths. Barriers should be cast and installed in accordance with the manufacturer’s recommendation.
2. Barriers should be self-aligning with no loose hardware.
3. Tolerance:

a. Connector location: plus or minus 1/6”b. Connector plate size: plus or minus 1/8”c. Barrier length: plus or minus ¼”

1. Fluorescent reflectors should be attached tot eh top of the barrier at intervals not greater than 40 feet in longitudinal sections and 20 feet in tapered sections. The reflector color should match the adjacent traffic stripe color. The reflectors should be mounted approximately two inches above the top of the barrier and should be attached to the barrier with adhesive or by a drilled-in anchor type device. If the barriers are used in a two-way traffic situation, then the reflectors should be installed for both directions of traffic. Cost of the reflectors and mounts should be a subsidiary obligation of the concrete barrier, Type 6.

Alabama F-Shape Barrier Elevation View Specifications

F-shape barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT elevation view specifications:

• Length: 10’
• Height: 2’-8”
• A 6x6 1’-6” wide x 11’-8” center mesh installed over the length of the barrier
• 3” between the top of the mesh and the top of the panel
• (4) #5 x 11’-7/8” ASTM A706 rebar should be welded to the J-hook connector plates
• 10” between the ground line and the first J-hook connector plates
• 1’-6” between the lower and upper J-hook connector plates
• 4” between the upper J-hook connector plate and the top of the panel
• Two lifting slots, each 1’-3” long, set 2’-0” apart from each other and 3’-9” from each end of the barrier
• A drainage slot running along the bottom length of the barrier

Alabama F-Shape Barrier End View Specifications

Barriers in Alabama should conform to the following dimensions and include the following features, according to the ALDOT end view specifications:

• Height: 2’-8”
• Bottom length: 2’-0”
• Top length: 9”
• Vertical reveal: 3”
• Break point: 10” from ground line
• Height of top slope: 1’-10”

Alabama F-Shape Barrier Reflector Details

F-shape barrier reflectors should conform to the following dimensions: 6” long, 6” high and positioned 2” from the top of the barrier.Alabama F-Shape Barrier J-J Hook Connector Plate DetailsPositive connectors, J-J hooks and connector plates should conform to the following dimensions and include the following features:

• Bars made of 4-#5 ASTM A-706 Grade 60 bars
• J-J hooks and connector plates set inside 2 x 2 x 3/16 angle
• 12” mill stock with factory rolled edge; no shear cut; flame or laser cut on the sides
• 3/8” connector plates that are 18” long
• 1-1/2” weld on both sides of rebar (typical top and bottom bar 3/16” minimum weld size)
• Rebar placement at plus or minus ¼” for hook assembly only
• Connector plate should be cut from 1’-6” x 10’-0” wide strips ripped from 3/8” x 5’-0” x 10’-0” A36 plate steel
• Prepare 10’ long edges for bending per ASTM specifications

Alabama F-Shape Barrier Rotation and Separation Details

When in an open position, there should be no more than 1-1/2” separation between the barriers.When rotated, the gap should be 3” and 4”, and the minimum horizontal radius due to vertical rotation should be 7 degrees.*Please note that this blog post is an interpretation of Alabama Department of Transportation's specifications. Please consult with Alabama DOT's most recent requirements for definitive information.

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Eiffel Trading’s barrier wall inventory ranges from used f shape barrier, to used jersey barrier, to used k-rail barrier, to everything in between. Furthermore, our construction material inventory also includes used crane mats, 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.

HDPE pipe is a type of pipe made out of high-density polyethylene, most often used for transfer of fluids and gas. It is frequently used as an alternative to or a replacement for concrete and steel pipelines that serve the same purposes. HDPE pipe is highly impermeable with a tough molecular bond, which makes it great for high pressure pipeline applications. It’s resistant to corrosion and helps prevent leaks. Additionally, it’s a low-cost alternative to other kinds of piping. Most HDPE pipe lasts between 50 and 100 years before having to be replaced. Its longevity is another reason it’s a very cost-effective choice.

BENEFITS

HDPE pipe also offers benefits like requiring minimal or no welding, lower risk of joint failures, and low instances of damage during transport, storage, and handling. Additionally, transporting HDPE pipe is generally less costly than transporting other types of pipe. HDPE pipes of the same diameter and level of performance weigh approximately one-tenth of the weight of concrete pipe and one-half the weight of cast iron. The lightweight nature of HDPE pipe is another benefit, and so too is the fact that it floats.

BENEFITS MARINE CONSTRUCTION APPLICATIONS

For marine construction applications, the ability of HDPE pipe to float is a major plus. Because its density is so low, HDPE pipe floats even when it is full of water of other liquids. Long lengths of HDPE pipe can be installed on shore to allow empty pipe to be weighted, ultimately allowing pipe filled with air to be floated to its desired location offshore. This makes getting the pipe where it needs to go much easier. Once HDPE pipe reaches its final destination, it can be weighted to keep it in place and prevent it from additional floating.HDPE is flexible, especially in comparison to concrete and steel pipe. In marine construction, this means that it can be gradually lowered into the water in a way that allows it to adapt to the natural topography of its surroundings. The flexibility of HDPE pipe also allows it to be situated directly on the natural bottom of the water without the need for trenching in many cases.The high strain capacity of HDPE pipe enables it to securely and safely adapt to pressures placed upon it by external forces, particularly waves and currents in marine applications. Its high strain capacity additionally allows it to bend itself when needed to prevent damage from waves and currents. This differs from concrete, steel, and iron pipes, which have lower strain capacities and lower abilities to bend. They are more susceptible to leaks and structural failures of their joints because of their comparative inflexibility.As mentioned, HDPE pipe is a low-cost option for numerous reasons. Its overall lower cost provides marine construction operations with the option to install several small outfalls instead of one large one. This makes HDPE pipe the eco-friendlier choice in many cases too. More outfalls translate to smaller amounts of effluent discharge in spread out areas. Ultimately, this also results in lowered costs for onshore pretreatment.

VARIOUS MARINE APPLICATIONS

HDPE pipe is used in a number of different kinds of marine construction applications, including:

• Wastewater applications (sewer mains, slurry transfer lines, etc.)
• Stormwater applications
• Transmission line protection at offshore windfarms
• Intake and outfall
• Irrigation projects
• Drainage pipe applications

INSTALLATION

HDPE pipes are delivered using barges and/or tug boats to marine construction sites. Once they arrive, they are ballasted, submerged, and then installed. Offshore, they can be installed using S-Bend methods or directional drilling methods. Onshore installation may be open trench, above the ground, or using pipe bursting. When welding is necessary, HDPE pipes can be welded using electrofusion, extrusion, butt fusion, or saddle welding.

BUY AND SELL WITH EIFFEL TRADING

In addition to used HDPE pipe, Eiffel Trading’s construction material inventory includes used sheet pile, used steel pipe, and much more. Furthermore, our marine equipment listings range from used deck barges, to used tug boats, 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.