520Expansion Devices - Non-Modular

520.01 Description This work shall consist of furnishing and installing expansion

devices including the seals, anchorage system and curb, sidewalk expansion dams and barrier sliding plates, where required, as shown on the Plans, in accordance with these specifications and per the seal manufacturer’s published recommendations. Seals for expansion devices shall be either gland seals or compression seals as specified on the Plans.

520.02 Materials Materials shall meet the requirements specified in the following

Sections of Division 700 - Materials: Expansion Device - Gland Seal Stud Shear Connectors, Anchors and Fasteners 711.06 Structural Steel 713.01 High Strength Bolts 713.02 S t e e l E x t r u s i o n s 713.08 E l a s t o m e r f o r S e a l E l e m e n t s 714.01 L u b r i c a n t A d h e s i v e 714.03 Gland Type Seals 714.06 Expansion Device - Compression Seal Stud Shear Connectors, Anchors and Fasteners 711.06 Structural Steel 713.01 High Strength Bolts 713.02 Elastomer for Seal Elements 714.01 Lubricant Adhesive 714.03 S e a l a n t 714.04 Compression Seals 714.05 Gland and compression seals shall be of the general configuration as shown on the Contract documents and shall be one of the seals listed on the Department’s Qualified Products List.

520.03 Fabrication All work shall conform to the applicable provisions of Section 504-

Structural Steel. The Contractor shall submit Working Drawings in accordance with Section 105.7, Working Drawings. 5-130 Seals shall be furnished and installed in one continuous length and splices will not be allowed, except as specified hereafter. As received from the supplier of the seal, seals may contain one splice for each continuous length of 50 feet or greater. Sections under 50 feet long shall not have any splices. Splices at abrupt angular changes in horizontal alignment will be allowed. Splices in gland type seals shall be shop vulcanized by the seal supplier. Splices in compression seals may be either vulcanized or adhesive bonded. At abrupt angular changes in vertical alignment, the lower 75 percent of the depth of compression seals may be cut to allow short radius bends.

520.04 Protective Coating The expansion device, including the curb and sidewalk

expansion dams and barrier sliding plates, shall be galvanized in accordance with the requirements for Protective Coatings in Section 504, Structural Steel. The galvanizing on the metal surfaces in direct contact with neoprene seals shall be lightly sandblasted to a dull gray appearance in order to promote a high strength bond between the seal and mating surface, and for smoothness for installation purposes. Alternately, this galvanized surface may be prepared to the manufacturer’s published recommendations for installation and bonding of seals. When specified on the Contract Plans, reinforcing steel shall be anchored into drilled holes.

520.05 Delivery Unless otherwise specified on the Plans, expansion devices shall be

shipped fully assembled and shall be installed as a unit. The unit shall be equipped with shipping and temperature adjustment devices approved by the Fabrication Engineer, and shall be preadjusted, in the fabrication facility, to the opening required at 45 degrees Fahrenheit.

520.06 Installation Expansion Devices shall be erected following placement of the

structural deck slab. The devices shall be lowered into the blocked-out area of the deck slab, adjusted for the temperature in accordance with the Plans and Working Drawings, set to the proper height and fastened in place, in accordance with the Standard Details. Once the expansion devices are set in their final positions, all shipping and temperature adjustment apparatuses shall be removed and the concrete for the slab and abutment backwall blocked-out area shall be placed immediately. Seal elements shall be installed in accordance with the manufacturer's recommendations, using equipment manufactured specifically for the purpose of installing the seal elements. The equipment shall not cause structural damage to either the seal or the joint armor and shall not twist, distort or cause other malformations in the installed seal element. Any perforation or tearing of a seal element due to installation procedures or construction activities will be cause for rejection of the installed seal element, requiring replacement by the Contractor at no cost to the Department. 5-131 Immediately prior to the installation of the seal element, the metal contact surfaces of the joint armor shall be clean, dry, and free of oil, rust, paint, or foreign material. Unless otherwise recommended by the seal manufacturer, the contact surfaces of the seal element shall be cleaned with normal butyl-acetate, using clean rags or mops, immediately prior to application of the lubricant-adhesive or sealant. The lubricant adhesive or sealant shall be applied to the seal element and joint armor contact surfaces at the rate recommended by the manufacturer of the seal. The exposed ends of compression seals shall be sealed with appropriately shaped pieces of foam rubber, bonded in place with sealant as described in Section 714.04, Sealant, or a bonding agent approved by the Resident.

520.07 Method of Measurement Expansion devices will be measured by each unit,

complete in place and accepted. Each unit shall consist of one pair of matching elements, including anchorage system, seal, shipping and temperature adjustment devices, curb and sidewalk expansion dams and barrier sliding plates, as required.

520.08 Basis of Payment The accepted quantity of expansion devices will be paid for at

the Contract unit price each, which shall be full compensation for all materials including anchorage system, protective coating, equipment, labor and incidentals necessary for furnishing and installing the expansion devices and, if required, curb and sidewalk expansion dams and barrier sliding plates. Payment will be made under: P a y I t e m P a y U n i t

520.21 Expansion Device - Gland Seal Each

520.22 Expansion Device - Compression Seal Each