1021ARMORED PREFORMED NEOPRENE COMPRESSION DAM

1021.1DESCRIPTION —This work is the furnishing and installation of armored preformed neoprene

compression dams for bridge joints, including the necessary fabricated structural steel.

1021.2MATERIAL—

manufacturer listed in Bulletin 15.

galvanization in the retainer extrusion must be of uniform thickness and free of excessive build -up, which would hinder the installation of the dam.

1021.3CONSTRUCTION—As shown on the Standard Drawings and as follows:

Before fabrication, submit shop drawings, as specified in Section 105.02(d), showing complete details, dimensions, size, type, and compression-deflection characteristics of the seal, as well as other information and data necessary for the complete fabrication and erection of the dam. Obtain acceptance of shop drawings before beginning fabrication. The seal may be installed in the shop, at the width determined for the erection temperature. For a shop- installed seal, make final width adjustment on the completed seal, if necessary, in the field for the temperature at the time when the dam is securely f astened to beams. No field adjustment will be needed for a ± 10F variation in temperature from the temperature for which the joint width was adjusted in the shop. After width adjustment, the seal may be installed in the field. Submit for approval the manufacturer’s data sheet for the seal that includes seal preparation and installation recommendations. Before installing the seal, clean metal surfaces in direct contact with the seal, to remove foreign material and to provide for proper bond between the seal and the metal surfaces. Clean according to the manufacturer’s recommendations. Swab the lubricant-adhesive on the faces of the angles forming the groove, according to the manufacturer's recommendations. While the adhesive is wet, install the seal, according to the manufacturer’s recommendations. Do not splice the seal, unless indicated. If splices are indicated, use only if splices are vulcanized and spliced by the manufacturer in the shop/factory and are watertight. If stretching of the seal during installation is unavoidable, do not exceed 5% elongation. Place the top of the seal at the walls, in contact with the deck joint structural steel, at a uniform depth of 1/4 inch minimum to 1/2 inch maximum below the deck surface. The Department will not accept cocked or twisted seal installations. Remove and replace seals that are damaged during installation. Repair galvanizing damaged during construction operations as directed and according to the manufacturer’s recommendations, at no additional cost to the Department. After installation, flood seal with water and inspect for leaks and/or damage. Repair any leaks or damage as directed and according to the manufacturer’s recommendations.

1021.4MEASUREMENT AND PAYMENT—Linear Foot

For the movement specified. Measured out -to-out along the centerline of the exposed surfaces of the seal and the steel plates, including sidewalks if applicable, following the vertical and sloped faces of curbs and barriers, resulting in a true length, not a horizontally projected length.

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