521Finger Joint and Fabric Trough/Fabric Curtain

521.01 Description This work shall consist of fabricating and installing finger joint

expansion devices and fabric troughs or fabric curtains when required, including the anchorage system, curb and sidewalk expansion dams, barrier sliding plates as required, support components for fabric troughs or curtains when required, and any metal downspout(s) and/or chute(s) used to guide the discharge from the trough(s) when required, and all necessary materials and equipment required to complete the work as shown on the Plans and in accordance with these specifications.

521.02 Materials - Finger Joints Plates requiring a non-skid surface shall conform to the

requirements of ASTM A786 or ASTM A36. Other plates shall conform to the requirements of ASTM A36 or ASTM A572. Shapes shall conform to the requirements of ASTM A500, Grades A and B, or ASTM A992. Other weldable steels may be used with 5-132 approval of the Fabrication Engineer. Anchor studs shall conform to the requirements of Section 711.06, Stud Shear Connectors, Anchor and Fasteners. Bolts shall conform to the requirements of AASHTO M169 (ASTM A325).

521.03 General All work shall conform to the applicable provisions of Section 504,

Structural Steel. Completed expansion devices and any required support components for troughs or curtains, expansion dams, barrier sliding plates, downspouts and chutes shall be hot dipped galvanized to the requirements of AASHTO M111 (ASTM A123). Anchorage parts encased in concrete may be supplied in the ungalvanized condition. Each expansion device shall be shipped fully assembled, shall be installed as a unit, and shall be equipped with shipping and temperature adjustment devices approved by the Resident. When a project is built in stages, and if desired by the Contractor, the expansion device may be shipped in two or more sections, as approved by the Fabrication Engineer, with appropriate provisions for field splicing.

521.04 Materials- Fabric Trough or Curtain The fabric for the trough or curtain shall be

⅛ to 3/16 inch in thickness and shall consist of a single layer of 14.6 ounce woven nylon fabric, or the equivalent in multiple layers of woven nylon fabric, laminated between two or more layers of neoprene rubber. The neoprene shall conform to the following requirements: Physical Properties: G r a d e ( D u r o ) 60 Original Physical Properties 60 +/- 5 Hardness ASTM D2240 Tensile Strength, Minimum 850 psi ASTM D412 Elongation at Break, Minimum Accelerated 300% Test to Determine Long Term Aging Characteristics Oven Aged - 70 Hours/212ºF, ASTM D573 Hardness, Points Change, Maximum +15 Tensile Strength, Change, Maximum - 15% Elongation at Break, Change, Maximum -40% Ozone - 1 PPM in Air by Volume 20% Strain No cracks 100 +/- 2ºF - ASTM D1149* 100 hours (*Samples shall be solvent wiped before test to remove any traces of surface impurities.) Compression Set - 22 Hours/ /212ºF ASTM D395 - Method B, 0/0 Maximum 35% ASTM D746 - Procedure B -40ºF Brittleness at No Failure Fluid Resistance - ASTM D471 70 Hours/212ºF in ASTM Oil No. 3 5-133 Change in volume, Maximum +120% Change in tensile strength, Maximum -70% Change in ultimate elongation, Maximum - 55% The finished fabric shall have a minimum breaking strength of 700 pounds/inch when tested by ASTM Test Method D5034. The minimum breaking strength shall be determined on a sample taken transverse to the centerline of the trough, or a random sample taken from the curtain. When delivered to the job site, each separate length, roll or container shall be clearly tagged or marked with the manufacturer's name, trade mark and lot number. A lot is defined as that amount of fabric manufactured at one time from one batch of elastomer. A batch is defined as that amount of elastomer prepared and compounded at one time. Not less than thirty days prior to the installation of the trough, a sample length of each lot of fabric, not less than 3 feet long, shall be submitted to the Resident for testing. All samples shall be taken from the lot(s) to be furnished, shall be tagged for identification purposes and shall be furnished to the Resident, at no additional cost to the Department. Approval of the material must be obtained before the material is incorporated in the work.

521.05 Fabrication The Contractor shall submit Working Drawings in accordance with

Section 105.7, Working Drawings. These drawings shall include, but not be limited to, the following information: The complete details of the method, materials and equipment proposed to be used in the installation operation. Such details shall give complete specifications and details of the elastomeric trough or curtain, and other data pertaining to the installation operation. Installation holes shall be cut round and cleanly with a sharp tool. Holes having jagged or roughly cut edges will be cause for rejection of the trough or curtain unit.

521.06 Construction of Fabric Trough Where a splice is required for staged

construction, the upper section of the trough shall be fitted inside the lower section of the trough in such a manner that any water spillage through the splice shall be eliminated.

521.07 Method of Measurement Expansion Device - Finger Joint will be measured by

each unit, complete in place and accepted. Each unit shall consist of one pair of matching devices including anchorage system, curb and sidewalk expansion dams, barrier sliding plates as required, and, if shown on the Plans, trough or curtain components, downspouts and chutes. Fabric Trough or Fabric Curtain for Finger Joint will be measured for payment by each unit complete in place and accepted.

521.08 Basis of Payment The accepted quantity of Expansion Device - Finger Joint will

be paid for at the Contract unit price each, which payment shall be full compensation for all materials including anchorage system, curb and sidewalk expansion dams, barrier sliding 5-134 plates, trough or curtain support systems, downspouts and chutes, galvanizing, equipment, labor and incidentals necessary for furnishing and installing the expansion devices and expansion dams. The accepted quantity of Fabric Trough or Fabric Curtain for Finger Joint will be paid for at the Contract price each, complete in place and accepted, which price shall include all materials, equipment, tools, labor and incidentals necessary for furnishing and installing the trough or curtain. Payment will be made under: P a y I t e m P a y U n i t

521.23 Expansion Device - Finger Joint Each

521.32 Fabric Trough for Finger Joint Each

521.33 Fabric Curtain for Finger Joint Each