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Electrical (16000-16999)

621000 WOOD STRUCTURES, LUMBER MFBM

DE · 2025 Standard SpecificationsBook pages 327–331View official source ↗

BEARING DEVICES SECTION 623 317 SECTION 623 — BEARING DEVICES

623.1Description.

This work consists of fabricating, providing, and installing bearing devices.

623.2Materials.

A.Elastomeric bearings, pot bearings, and disc bearings in accordance with Chapter 18 of the

specified edition of the AASHTO LRFD Bridge Construction Specifications, including materials, fabrication, and testing.

B.Dowels Section 1037

C.Anchor Bolts Section 1039

D.Non -Shrink Grout Section 1047 .2

E.Epoxy Grout Section 1047 .4

F.Bearing Grease Waterproof, NLGI 2

623.3Construction.

A.Manufacture and test bearings in accordance with the current edition of the AASHTO LRFD Bridge

Construction Specifications, Chapter 18.

B.Submittals.

1.Prepare and submit working drawings for the bearings. Show all details of the bearings and of

the materials proposed for use. Provide the seal of a professional Delaware engineer. Do not begin fabrication until receiving the engineer's approval of the d rawings. Include the following in the working drawings:

a.The manufacturer's name, location of the fabrication plant, and the name of the

representative responsible for coordinating production, inspection, sampling, and testing.

b.The total quantity of each kind of fixed, guided expansion, or non -guided expansion bearing

required grouped first according to load range type and then grouped by actual design capacity.

c.The type of materials used for all bearing elements.

d.A description and details for welding processes used in the bearing manufacture that do not

conform to the approved processes of the specified AASHTO/AWS D1.5 Bridge Welding Code.

e.The painting or coating requirements.

f.Plan, section, and elevation views showing all relative dimensions and alignment of each type

of bearing.

g.Complete design calculations verifying conformance with the contract including vertical and

horizontal load, rotation, and movement capacity; and maximum design coefficient of friction as noted in the contract.

h.The installation scheme showing bearing preset details and anchorage details.

BEARING DEVICES SECTION 623 318 2. If the contractor proposes an alternate design, submit supporting calculations certified by a registered Delaware professional engineer. Design bearings in accordance with the specified edition of the AASHTO LRFD Bridge Design Specifications, Chapter 14 . For steel -reinforced elastomeric bearings, design using Method B.

C.Packaging, handling, and storage.

1.Before shipment from the point of manufacture, package bearings to protect against damage

during shipment and storage.

2.Identify each bearing by marking the location and orientation on the top of the bearing. Bolt,

strap, or otherwise fasten the components to prevent movement.

3.Store bearing devices and components at the work site in an area that provides protection from

environmental and physical damage. Do not store elastomeric pads in direct sunlight.

4.Do not dismantle bearings at the site unless required for inspection by the engineer or approved

by the engineer for installation. If the contract requires dismantling at the site, open or dismantle the bearings only under the direct supervision of the manufacturer's representative.

D.Elastomeric bearings.

1.The contractor may place elastomeric bearings without external load plates directly on a

concrete or steel surface provided that it is flat to within a tolerance of 0.5 percent of the nominal dimension for steel reinforced bearings and 1 percent of the nom inal dimension for others. Place these bearings within 0.01 radians. Use grout or approved equal means to correct any lack of parallelism between the top of the bearing and the underside of the girder that exceeds 0.01 radians.

2.Weld exterior bearing plates only if there is 1 1/2 -inches of steel between the weld and the

elastomer. Do not subject the elastomer or bond to temperatures in excess of 390 degrees F.

3.For new structural steel, vulcanize the bearing to the sole plate before shipping to the site. For

new concrete beams or replacing bearings in the field, use an approved epoxy adhesive to attach the bearings to the beam or sole plate.

4.Use an approved epoxy adhesive to attach the bearing to the bridge seat. Clean the bridge seat

before applying the adhesive.

E.Pot and disc bearings.

1.Install bearings in accordance with the contract and working drawings. Ensure that a technical

representative of the bearing manufacturer is on -site for the first bearing installation and available to provide guidance for the duration of the installatio n process.

2.Ensure that the manufacturer's representative or the engineer inspects bearing components

upon final installation to verify that the components are level and parallel to within 0.03 inch per foot.

3.If the bearings do not meet the tolerances above, submit a plan to correct deviations.

F.Anchor bolts.

1.Provide swedged or threaded anchor bolts to ensure a secure grip on the material used to

embed the bolts in the holes. BEARING DEVICES SECTION 623 319 2. Either cast -in-place or epoxy grout anchor bolts in preformed sleeved holes. Burr the threads at the face of the nut.

3.Fill the slots and holes in the masonry plates around the anchor bolts with an approved non -

hardening caulking compound or elastic joint sealer.

4.When replacing anchor bolts, drill out the existing bolts. Take precautions not to damage any

portion of the existing bearing intended for reuse or any of the existing bar reinforcement.

5.Locate anchor bolts to anticipate a variation from mean temperature of the superstructure at

the time of setting. Anticipate lengthening of the bottom chord or bottom flange, resulting from dead load after setting, so that the anchor bolts at expansion bearings will center in the slots at mean temperature and under dead load. Ensure that anchor bolts or nuts allow full and free movement of the superstructure at movable bearings.

G.Cleaning and greasing bearings.

1.Clean bearings before greasing using high -pressure water flushing at 3,000 PSI.

2.Remove remaining debris by hand -chipping.

3.Allow bearings time to fully dry before applying grease.

4.Apply grease at sufficient pressure and rate such that it covers the contact surface completely.

5.Ensure a final film of 1/16 -inch minimum on the exposed area of bearings.

623.4Method of Measurement.

A.The Department will measure:

1.Bearing devices as the number of each bearing device placed and accepted.

2.Replaced anchor bolts as the number of each anchor bolt removed, replaced, and accepted.

3.Cleaning and greasing bridge bearings as the number of each bearing cleaned, greased, and

accepted.

623.5Basis of Payment.

A.Price and payment for bearings constitute full compensation for providing all materials , testing,

cleaning, lubricating, and installing bearing devices.

B.Price and payment for replacing anchor bolts constitute full compensation for providing new

anchor bolts, removing and disposing of existing anchor bolts, and installing anchor bolts.

C.Price and payment for cleaning and greasing bearings constitute full compensation for cleaning,

disposing of debris, and greasing bearings. ITEM DESCRIPTION UNIT 623000 ELASTOMERIC BEARINGS EACH 623001 POT BEARINGS EACH 623002 DISC BEARINGS EACH 623003 REPLACE ANCHOR BOLTS EACH BEARING DEVICES SECTION 623 320 ITEM DESCRIPTION UNIT 623004 CLEAN AND GREASE BRIDGE BEARINGS EACH 623005 STEEL REINFORCED ELASTOMERIC BEARINGS EACH

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.

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 327–331 of 779.

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61900 1 BRICK MASONRY SF

62300 0 ELASTOMERIC BEARINGS EACH