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Electrical (16000-16999)

623000 ELASTOMERIC BEARINGS EACH

DE · 2025 Standard SpecificationsBook pages 331–334View official source ↗

JOINTS SECTION 624 321 SECTION 624 — JOINTS

624.1Description.

This work consists of fabricating, providing, and installing joints and joint seals.

624.2Materials.

A.Prefabricated Expansion Joint System

1.Galvanized Steel Section 1039

2.Strip Seal Section 1042.4.A

C.Closed -Cell Joint Seal Section 1043

D.Asphaltic Plug Joint Section 1042.B

E.Silicone Seal ASTM D5893

F.Pre-compressed silicone coated, self -expanding foam bonded to joint substrate by adhesive.

624.3Construction.

A.Submittals.

1.Provide a complete set of working drawings, in accordance with Section 105.4, before beginning

fabrication. Include details and drawings of the steel elements, seals, and all other permanent elements fabricated as part of the joint system. Include techn ical data relating to the joint material, patching mortar, primer, adhesive, and other related materials, as well as mill test reports for all steel.

2.Arrange for a manufacturer’s representative to attend the initial installation of the respective

joint system. A manufacturer's letter of certification as an approved installer may suffice instead of having a manufacturer's representative onsite. Qualif ying personnel must oversee all operations.

3.Submit the qualifications of the contractor to verify successful completion of at least 3 separate

similar projects with the same type of joint system within the last 5 -years. Include a brief description of each project and the owner's contact person's name and current phone number for each project listed.

B.Prefabricated expansion joint system.

1.For rehabilitations, remove the existing joint and surrounding concrete in accordance with the

contract. Repair concrete in accordance with Section 628, as required.

2.Unless approved otherwise, shop -assemble the prefabricated system as a unit and preset before

shipment. Set the opening of the joint at the width required for the seal in accordance with the contract. Galvanize steel elements. Perform welding and steel cutting work in accordance with

3.Protect joint materials and assemblies from damage. Support assemblies when stored at the job

site to maintain true shape and alignment. JOINTS SECTION 624 322 4. Install the prefabricated expansion joint system, including strip seal, steel extrusion, and application of adhesives, in accordance with the manufacturer's recommendations. Use tools for insertion of seals in accordance with the manufacturer’s recommen dations.

5.Provide and install the strip seal in 1 piece for the full joint length.

6.Install deck joint assemblies to provide a smooth ride.

C.Strip seal gland replacement.

1.Remove the existing strip seal gland and adhesive.

2.Use an abrasive to blast clean the extrusion to remove all debris and loose material. Do not

damage existing steel extrusions.

3.Install the prefabricated strip seal and apply adhesives in accordance with the manufacturer's

recommendations.

4.Provide and install the strip seal in 1 piece for the full joint width.

D.Asphaltic plug joint.

1.During surface preparation and installation, provide qualified personnel on site to oversee and

direct the operation for conformance with manufacturer's specifications for both the asphaltic and parapet joint seals.

2.Remove the concrete in the joint using saws and pneumatic hand tools. Remove all debris from

the joint.

3.Repair spalled and defective concrete in accordance with Section 628.

4.Prepare the surface of the concrete substrates before receiving the joint material. Install the

joint material in accordance with the manufacturer's recommendations.

5.Ensure that the steel plate sits squarely and does not rock on the concrete surfaces. If necessary,

remove additional concrete and build up the joint using patch mortar to the required elevation.

6.After compaction, place lines of 4 -inch tape 1 -inch beyond the joint width on each side of the

joint. Topcoat the joint and at least 1 inch of the road surface with the hot binder until the surface is smooth and absent of voids.

7.Immediately after top -coating, spread an anti -skid material over the joint to eliminate material

tracking.

8.In the event of a work stoppage, fill the cavity with cold -patch asphalt, in accordance with

Section 1015.

9.After curing of the asphaltic joint material, seal the parapet joints along the traffic face of the

parapet, in accordance with the manufacturer's surface preparation and installation procedures.

E.Silicone seal.

1.Remove and dispose of existing joint seal.

2.Abrasive -blast and prepare the surfaces of the armor and angles receiving the silicone seal in

accordance with the manufacturer's instructions. Before installing round backer rod, blow joints clean with compressed air. Install the backer rod in a consis tent, uniform placement at the proper depth below the bridge deck surface. JOINTS SECTION 624 323 3. Install the silicone sealant as soon possible after backer rod placement.

4.Install the silicone sealant in accordance with the manufacturer's recommendations and to the

shape and dimensions shown in the contract. Any failure of the sealed joint due to lack of adhesion or cohesion of joint material, improper or unsatisfactory w orkmanship, or damage by the contractor's operations will result in rejection. Repair the joint to the engineer's satisfaction.

5.Ensure that placement of the silicone seal is at least 1/4 -inch below the riding surface.

6.After sealing a joint, remove excess sealant or other residue on the bridge deck surface. Do not

allow traffic on the new seal until the sealant is tack -free and until debris from traffic does not embed into the sealant.

F.Compression Seal.

1.Repair concrete spalls and cracks in accordance with Section 628.

2.Sand -blast surfaces of the joint receiving the compression seal in accordance with

manufacturer's recommendations immediately before the applying the adhesive and installing the seal.

3.Perform welding and steel cutting work in accordance with Section 615.

4.Follow the manufacturer's recommendations for surface preparation, adhesive application, and

compression seal installation. Place the compression seal at least 1/2 -inch below the adjacent riding surface.

G.Silicone coated foam joint seal.

1.Prior to ordering the joint material, measure the joint opening to confirm the required size. If

the required size conflicts with the contract, notify the engineer immediately.

2.Fully remove and dispose of the existing seal, gland, and adhesive.

3.Prepare the surface of the concrete/steel substrates in accordance with the manufacturer’s

recommendations prior to installing joint materials.

4.Install joint material and use bonding agent in accordance with manufacturer’s

recommendation.

624.4Method of Measurement.

The Department will measure the quantity of joints as the number of linear feet of joints fabricated, installed, and accepted.

624.5Basis of Payment.

A.Price and payment for:

1.A prefabricated expansion joint system constituting full compensation for removing and

disposing of the existing joint system and fabricating, providing, and installing the expansion joint system.

2.Strip seal constituting full compensation for removing and disposing of the existing seal, cleaning

existing extrusions, providing, and installing the strip seal.

3.Asphaltic plug joints constituting full compensation for pre -measuring, providing and placing all

materials, cleaning and preparing the joint, and sealing the parapet joints. JOINTS SECTION 624 324 4. Silicone seal constituting full compensation for removing and disposing of the existing seal, providing and placing all materials, and cleaning and preparing the joint.

5.Compression seal constituting full compensation for removing and disposing of the existing seal,

providing and placing all materials, cleaning and preparing the joint, repairing spalls, and sealing cracks.

6.Silicone coated foam joint seal constituting full compensation for removing and disposing of

existing seal, pre -measuring, providing and placing all materials, and cleaning and preparing the joint.

B.The Department will pay for concrete removal and repair in accordance with Section 628.

ITEM DESCRIPTION UNIT 624000 PREFABRICATED EXPANSION JOINT SYSTEM, 3" LF 624001 PREFABRICATED EXPANSION JOINT SYSTEM, 4" LF 624002 PREFABRICATED EXPANSION JOINT SYSTEM, 5" LF 624003 STRIP SEAL GLAND, 1 1/2" LF 624004 STRIP SEAL GLAND, 2" LF 624005 STRIP SEAL GLAND, 3" LF 624006 STRIP SEAL GLAND, 4" LF 624007 STRIP SEAL GLAND, 5" LF 624009 ASPHALTIC PLUG JOINT LF 624010 SILICONE JOINT SEAL, 1" LF 624011 SILICONE JOINT SEAL, 2" LF 624012 SILICONE JOINT SEAL, 3" LF 624013 COMPRESSION SEAL, 1" LF 624014 COMPRESSION SEAL, 2" LF 624015 COMPRESSION SEAL, 3" LF 624016 COMPRESSION SEAL, 4" LF 624017 SILICONE COATED JOINT SEAL, 1 " LF 624018 SILICONE COATED JOINT SEAL, 2 " LF 624019 SILICONE COATED JOINT SEAL, 3 " LF 624020 SILICONE COATED JOINT SEAL, 4 " LF 624021 CLOSED -CELL JOINT SEAL, 1 " LF 624022 CLOSED -CELL JOINT SEAL, 2 " LF 624023 CLOSED -CELL JOINT SEAL, 3 " LF

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 331–334 of 779.

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