Article 1 — Description
Furni sh materials and construct concrete sound (noise) walls as shown on the plans and in accordance with this Item.
Article 2 — Materials
2.1 General . Use materials conforming to the pertinent requirements of the following Items.
Item 420, “Concrete Substructures” Item 421, “Hydraulic Cement Concrete” Item 424, “Precast Concrete Structural Members (Fabrication)” Item 427, “Surface Finishes for Concrete” Item 440, “Reinforcement for Concrete” Item 441, “Steel Structures” Item 442, “Metal for Structures” Item 445, “Galvanizing” Item 446, “Field Cleaning and Painting Steel” Item 449, “Anchor Bolts” Use galvanized anchor bolts, nuts, and washers. Galvanize steel components as shown on the plans. Paint over galvanized components as shown on the plans. Use approved joint fillers, grout, and other incidental materials as shown on the plans or as approved. Use joint fillers, pads, waterstops, and other incidental materials as shown on the plans or approved.
2.2 Concrete. Use concrete for sound (noise) walls that conforms to the requirements shown in Table 1, unless
otherwise shown on the plans. Table 1 Concrete for Sound (Noise) W alls Application Concrete Precast, non -prestressed Class H ( Min f’c = 4,000 psi) Precast, prest ressed Class H ( Min f’c = 5,000 psi) Cast-in-place, reinforced Class C Cast-in-place, non -reinforced Class A
Article 3 — Construction
3.1 General . Construct sound (noise) walls conforming to the design and details shown on the plans and to the
pertinent requirements of the following Items. Item 110, “Excavation” Item 400, “Excavation and Backfill for Structures” Item 420, “Concrete Substructures” Item 424, “Precast Concrete Structural Members (Fabrication)” 508 3.2. Precast Panel Sound (Noise) Walls.
3.2.1 General . Set all posts plumb and firm to the line and grade shown on the plans.
Do not exceed a maximum 1/2- in. horizontal alignment tolerance when measured from post to post. Construct walls to an overall vertical tolerance (plumb from top to bottom) that does not exceed 1/4 in. per 10 ft. of wall height.
3.2.2 Options . The Contractor has the option to furnish any proprietary sound (noise) wall system that meets the
requirements of this Item and that complies with the design criteria shown on the plans. All sound (noise) w all systems will use one of the following foundations: spread footing with width, embedment depth, thickness, and reinforcing steel as shown on the plans ; drilled shafts with the same spacing, diameter, length, and reinforcing steel as shown on the plans or in conformance with other foundation details as specified; or concrete pavement designed to act as a foundation with thickness and reinforcing steel as shown on the plans. Provide these systems in accordance with Article 7.5., “Patented Devices, Material, and Processes.”
3.2.3 Submittals . Before fabrication, prepare and submit casting drawings, construction drawings , and design
calculations in accordance with the following Sections for the proposed sound (noise) wall system to the Engineer for review and approval in accordance with the Department’s Guide to Electronic Shop Drawing Submittal process. 3.2.3.1. Casting Drawings . Include all information necessary for precast wall elements o n the casting drawings. Casting drawings must reflect the shape and dimension of precast components ; the size, quantity, and details of the reinforcing steel ; the quantity, type, size, and details of connection and lifting hardware; the s ize and location of drain openings ; and any necessary additional details. 3.2.3.2. Construction Drawings . Include a numbered wall component layout reflecting field verified horizontal and vertical alignment of the wall. Also include all information needed to erect the wall, including the proposed drilled shaft elevations and lengths; limits of riprap; the type, details, and construction procedure for connecting the wall to the drilled shafts, footing, or pavement; details necessary to account for change of grade; existing and proposed utilities; and any additional details needed to construct the wall. 3.2.3.3. Design Calculations. Provide design calculations that include a summary of design parameters used, including material types, strength values, allowable stresses, assumed loads, and load combinations. Submit calculations covering the range of heights and loading conditions on the project. Provide drawings and design calculations that bear the seal of a licensed p rofessional e ngineer registered in the State of Texas.
3.3 Cast -in-Place Sound (Noise) Walls. Construct required foundation and cast -in-place sound (noise) walls as
shown on the plans.
Article 4 — Measurement
This Item will be measured by the front surface square foot of area of the sound (noise) wall, complete in place. Length will be measured by the foot along the alignment of the wall from beginning to end of wall, and height will be measured from the top of the foundation element, such as footing, drilled shaft, or concrete pavement, to the top of the profile of wall, unless otherwise shown on the plans. 509 5. PAYMENT The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Sound Wall.” This price is full compensation for furnis hing, designing, and installing all sound (noise) wall materials , including footing; anchorage into the supporting members; excavation and backfill; sound (noise) wall preparation, hauling, and erection; and labor, tools, equipment , and incidentals. Drilled shafts for sound (noise) wall foundations will be paid for in accordance with Item 416, “Drilled Shaft Foundations.”