815Joints

Joints

815.01DESCRIPTION. Furnish and construct joints of the type, dimensions,

and at the locations specified. Joints are composed of metalwork plates, metalwork extrusions, or concrete nosing on both sides of the joint opening. Joints may contain a seal to prevent water and debris from passing through the joint opening. When existing joints are to be replaced, prepare the existing area for installation of new joints.

815.02MATERIALS Comply with the following:

Metals Section 807, Section 1013 Welding Section 809 Portland Cement Concrete Section 901 Joint Fillers 1005.01 Joint Seals Section 1005 Unless otherwise specified, steel used in joint system fabrication, including barrier armoring, shall be AASHTO M270 Grade 50, and shall be hot dip galvanized after fabrication in accordance with Section 811. Use A325 high strength fastener assemblies in the sizes and lengths specified and in accordance with Section 807. Type 1 bolts, nuts, washers, and DTIs shall be mechanically galvanized in accordance with 811.08.

815.03SUBMITTALS

When specified, submit a Joint Design, Fabrication Plan, and Installation Plan to the Bridge Engineer for review in accordance with Section 801. Do not begin work until submittal acceptance. Acceptance by the engineer will be subject to field performance and will not relieve the contractor of the responsibility to satisfactorily complete the work. Include the following as a minimum:

verifying the contractor or subcontractor has the required design, fabrication and installation experience. The required experience consists of having designed and fabricated similar bridge joints for a minimum of five years, and having performed at least ten bridge joint installations similar to the joint specified. The design of the joint assembly shall be in accordance with the AASHTO LRFD Bridge Design Specifications and shall be stamped, signed and dated by a professional engineer registered in Louisiana.

the American Institute of Steel Construction (AISC) for Simple Steel Bridges.

markings.

The installation procedures included with the submittal shall be in accordance with the recommendations of the joint manufacturer, and shall include at a minimum:

tensioning, and for placing surrounding concrete to the lines required.

and sliding cover plate assemblies.

815.04CONSTRUCTION REQUIREMENTS

.1 Joint Systems: Conform to Section 809 for welding. Field

welding is not permitted. The joint system shall accommodate the longitudinal movements shown on the plans while maintaining a smooth riding surface conforming to the profile grade of the bridge deck, with minimal space between fingers, plates, extrusions or concrete nosings. A smooth riding surface is defined as no more than 1/8 inch deviation of plates and finished concrete surface from a 10.0 feet straight edge placed anywhere across the joint. When specified, the joint system shall prevent the passage of water, debris, and other deleterious substances through the deck joint. Submit shop drawings to the Bridge Engineer for review in accordance with armoring, plates, fastener assemblies, setting/installation tables and procedures, and all other elements of the work in accordance with the contract. Store joint material under cover on platforms above ground, and p rotect at all times from damage.

.1.1 Unsealed Expansion Joint: Fabricate and install joint as

shown on the plans and specifications. Install joint in accordance with 815.04.2.

.1.2 Sealed Expansion Joint: Fabricate and install joint as

shown on the plans and specifications. Install joint in accordance with 815.04.2. Install joint seal in accordance with 815.04.3.

.1.3 Sealed Expansion Joint (Modular): Fabricate and install

joint as shown on the plans and specifications. Install joint in accordance with

.2. Install joint seal in accordance with 815.04.3

.1.4 Expansion Joint (Finger): Fabricate and install joint as

shown on the plans and specifications. Install joint in accordance with 815.04.2. Install joint trough in accordance with 815.04.3. Provide steel finger plates, elastomeric drainage troughs, barrier sliding plate or armor assemblies, fastener assemblies, shapes, studs, anchors or fixing devices, and all other required components of the expansion joint system required to complete the work in accordance with the details and requirements of the plans and specifications. Alternate designs shall be in accordance with AASHTO LRFD Bridge Design Specifications, including all fatigue requirements. Provide all features of the joint system as shown on the plans. This includes removable and replaceable plates, troughs, and parts (short, manageable sections), watertight drainage troughs, pre- tensioned anchor bolts, and other elements. Steel finger plates and armor plates shall sustain all loads and impacts without damage or fatigue of the joint or structure to which it is secured. If an alternate design is submitted by the contractor, the contractor shall be responsible for all costs associated with the review by the Department and/or the Department’s consultant. Maximum and minimum joint openings and finger plate requirements shall be as shown on the plans. Align fingers (teeth) parallel to the direction of movement and provide the minimum and maximum spacing required. Install the finger joint surface to provide a smooth riding surface that conforms to the profile grade. Shape and install the fingers of the joint as shown on the plans to ensure that the fingers remain below the level of the riding surface at all times under all anticipated movements and rotations of the superstructure and substructure. Design, fabricate, and install drainage troughs in accordance with the plans such that a minimum true slope of 8 percent is maintained across the structure with due consideration for superelevation at the joint location. Provide a minimum sag of 6 inches measured from the trough attachment points at the maximum joint opening at the centerline of the girder. Trough and sheet limits shall be as shown on the plans.

.2 Joint Installation: Exercise care during installation to avoid

damage to components of the joint system. All damaged plates, fingers, shapes, fastener assemblies, troughs, seals, membranes, or other elements of the work shall be removed and repaired or replaced with new components in a manner acceptable to the engineer and at no cost or time to the Department. Deck surface preparation, including grinding and/or grooving required to meet surface smoothness and finish specifications, shall occur before installation of the joints. To allow movement of construction personnel, temporarily bridge joints using suitable materials and means that prevent damage to the structure until joints can be installed. Do not install joint until the Joint Installation Plan is accepted. Employ p ositive methods to keep joints straight, true and in correct position during concrete placement. Adjust the open space of the expansion joints to accommodate the difference between the designated plan temperature and installation temperature. Remove temp orary restraints placed in joints as soon as possible after placing concrete adjacent to the joint. Do not extend reinforcement across the joint. Maintain proper cover on reinforcing steel at joint openings. Installed joint shall be free of dirt, oil, grease, or other foreign substances. Accurately locate and securely hold anchor bolts, armor plates, and fixing devices to correct line and level during placement of secondary concrete to fill the blockout region when required . Concrete shall be placed, properly consolidated with no voids, finished, and cured to ensure proper strength and durability. When specified on the plans, provide a formed surface to contain the secondary concrete placement at the front edges of the opening underneath both sides of the joint. Secondary concrete for filling blockouts shall be the same class and strength as that specified for the bridge deck, unless otherwise specified. The contractor may propose a mix design utilizing a maximum coarse aggregate size of 3/8 inch provided the proposed mix meets the same strength, permeability and durability specified for the bridge deck. Submit mix design to the Bridge Engineer for review. Prior to final acceptance, remove a ll materials used to form the secondary placement of the expansion device blockout and to temporarily support the expansion device until concrete set.

.3 Joint Seals: Install materials as shown on the plans and in

accordance with the manufacturer’s recommendations. Seal joints full width, including curbs and sidewalks. The concrete shall be at least seven days old prior to sealing. Use similar sealants for the same type of joints within the entire structure.

.3.1 Poured Seals: Before application of the sealant, clean and

sandblast joint faces. Thoroughly dry joints at the time of installation. Install backer material and sealants in accordance with the manufacturer’s recommendations. Apply primers as directed by the manufacturer and the same day as sealant installation. Use the appropriate backer material for the sealant system being applied. Hot poured rubberized asphaltic type is not allowed for bridge deck joints.

.3.2 Preformed Neoprene Sealing Systems: Apply the

adhesive lubricant just prior to installation of the gland. Use an amount of lubricant sufficient to completely cover the contact surfaces of the steel extrusion and the seal glands. Install in a manner that least disturbs the adhesive lubricant. Do not dilute the adhesive lubricant.

.3.3 Preformed Silicone Sealing Systems: Concrete or steel

surfaces to which the seal is to be adhered shall be clean, dry, and free of all loose concrete or material that would adversely affect seal adhesion prior to application of the adhesive. For high early strength concrete joint repairs, shorter installation times may be allowed pending review and approval by both the joint seal and concrete manufacturers. Remove bond breaker residue to the satisfaction of the engineer. Size the joint seal dimensions in accordance with the plans. Materials used for forming new concrete joints where the seal is to be adhered shall be applied in accordance with the seal manufacturer’s recommendations. Apply the adhesive in accordance with the manufacturer’s recommendations. Follow the manufacturer’s instructions and recommendations for handling and installing joint seal. Rips, tears, or bond failure will be cause for rejection.

.3.4 Fabricated Troughs and Membranes: Fabricate troughs

and membranes as a single piece without splices. Construct watertight connections. . Cut all material cleanly, with a true edge using suitable sharp tools and methods to provide a straight and accurate installation. Conform to manufacturer’s recommendations. When drainage troughs are required, fabricate and install elastomeric drainage troughs, sheets, seals, or other membranes to collect all water, moisture, debris, and other deleterious substances from the roadway passing through the openings between fingers. Attach and seal troughs, sheets, seals, and membranes to the joint assembly so that no leakage occurs and adjacent parts of the structure remain protected during normal operation and flushing of the joints by maintenance personnel.

815.05MEASUREMENT. Measurement of joints and seals will be per linear

foot. Measurement will be the length parallel to the joint between curb lines. Components and work extending into curbs and barriers will not be measured for payment.

815.06PAYMENT. Payment for joints and seals will be made at the contract

unit price which includes design, submittals, materials, fabrication, testing, certification, transport, delivery, storage, handling, labor, equipment, tools, and incidentals necessary to complete the work. Payment will be at the contract unit price under: Item No. Pay Item Pay Unit

815-01Unsealed Expansion Joint (Type) Linear Foot

815-02Sealed Expansion Joint (Type) Linear Foot

815-03Joint Seal (Type) Linear Foot