Specifications Vol. II - Laserfiche WebLink

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..., . n . 521-6 Joints. 521-6.1 General: Place expansion and contraction joints in concrete barrier wall either mounted on or adjoining rigid structures in a manner similar to the type and method of jointing used in the supporting or adjoining structure or as shown in the Contract Documents. Place expansion and contraction joints in concrete barrier wall supported by soil or flexible foundation materials in the manner detailed in the plans. 521-6.2 Contraction Joints in Barrier Wall Supported by or Adjoining Rigid Structures: The Contractor may form or saw contraction joints. When sawing contraction joints, saw them as soon as the concrete has hardened sufficiently to permit sawing without raveling and before uncontrolled cracking occurs, but in no case later than 12 hours after casting. Match contraction joints to adjacent contraction joints in the structure. Space contraction joints at 15 to 30 foot [4.5 to 9.0 m] intervals. For barrier wall on bridge structures or approach slabs, space contraction joints as shown in the Contract Documents. 521-6.3 Expansion Joints in Barrier Wall Supported by or Adjoining Rigid Structures: Construct expansion joints at right angles to the face, and extend them through the entire cross-section of the barrier wall. Construct barrier wall expansion joints at the same location and width as the expansion joints in the structure on which the wall rests and at other locations shown in the Contract Documents. When constructing reinforced barrier wall, form expansion joints with an expansion filler material or removable forming materials and secure to the forms as required to provide proper position. When using slip forming to construct non-reinforced barrier wall, construct expansion joints as in reinforced barrier wall or saw the joint through the plastic concrete the full depth and width of the barrier section. Where using the plastic sawing method, place close fitting shields over the concrete on each side of the joint for protection during sawing and hand finishing of the concrete at the joint. r"l . r'l . .., . r"1 . r""') . q . .., . ,., . .... .., 521-7 Method of Measurement. The quantity to be paid for under this Section will be the plan quantity, in feet [meters], completed and accepted. The quantity will be measured along the top of the barrier wall from the begin to end station, including transitional and end sections, with no deduction for expansion joints or open joints. Barrier wall on bridge structures and approach slabs to be removed shall be included in the cost of Removal of Existing Structures. Barrier wall to be removed along roadways are included in the cost of clearing and grubbing, or if a pay item is included, in the cost of Removal of Concrete Barrier Wall. . . ,.., . .., . ,.., 521-8 Basis of Payment. Price and payment will be full compensation for all work specified in this Section, including all reinforcing steel, conduits, materials and incidentals necessary to complete the work. . Payment will be made under: Item No. 521- 1- Concrete Barrier Wall - per foot. Item No. 2521- 1- Concrete Barrier Wall - per meter. Item No. 521- 5- Concrete Traffic Railing Barrier (Bridge) - per foot. Item No. 2521- 5- Concrete Traffic Railing Barrier (Bridge) - per meter. Item No. 521- 6- Concrete Parapet (Bridge) - per foot. Item No. 2521- 6- Concrete Parapet (Bridge) - per meter. Item No. 521- 7- Retaining Wall System - per foot. ..., . ,.., . '-' . ..., 09/09 01000-117 03-4122.F .