Specifications & Contract Documents
MUNICIPALITY OF ANCHORAGE
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- SECTION 70.XX SPENARD FENCE Article XX.1 Description
- Article XX.3 Construction
- Article XX.4 Measurement
- Article XX.5 Basis of Payment
- SECTION 70.YY Welded wire retaining wall with 24" lift (commercially galvanized wire) Article YY.1 Description
- Article YY.3 Select Granular Backfill Materials
- Article YY.4 Construction Requirements
- Article YY.5 Method of Measurement
- SECTION 70.ZZ WEIR Article ZZ.1 General
- Article ZZ.3 Construction
- Article ZZ.4 Measurement
MUNICIPALITY OF ANCHORAGE PUBLIC WORKS DEPARTMENT PROJECT MANAGEMENT AND ENGINEERING DIVISION PROJECT NAME PROJECT LIMITS XX-XX XV PLANS (XX SHEETS) Suggested organization of Plan Set}
SECTION 70.XX SPENARD FENCE Article XX.1 Description Work under this Section consists of providing all labor, materials, equipment, and transportation required to construct fencing as shown on the drawings. Article XX.2 Materials A. Materials used in the construction of fencing shall be in accordance with the drawings and as described below. Fence shall meet all MOA codes including minimum deflection of 1/4” at 50/L.F. B. All fence panels, hinges, hinge flanges, and bolts shall be hot-dipped galvanized after fabrication. C. Fence style shall be “Heavy Regal” style #110 as manufactured by Builders Fence Co., Inc., or approved equal. Builders Fence Company, Inc. 8937 San Fernando Road Box 125 Sun Valley, CA 1-800-767-0387 D. Panels shall be manufactured from tubing meeting the requirements of A.S.T.M. A 513. End and rail pickets shall be one and one-half inch (1-1/2”) square; intermediate pickets shall be three-quarter inch (3/4”) square. End and rail pickets shall be fourteen (14) gauge; intermediate pickets shall be sixteen (16) gauge. All welding shall be in accordance with AWS D1.1 Welding electrodes shall be E 70 XX. E. Steel bars, flat plates, and shapes shall be manufactured from steel conforming to the requirements of A.S.T.M. A 36. F. After fabrication, panels and hinge flanges shall be hot-dipped galvanized per A.S.T.M. A 123. G. After galvanizing, panels and hinge flanges shall be washed with Carboline’s Surface Cleaner #3 and rinsed thoroughly. H. After washing, panels and hinge flanges shall be coated with a two component polyurethane primer and a two component polyurethane top coat. 1. The prime coat shall be Carboline Rustbond LT Polyurethane Primer. Minimum dry film thickness shall be 1-2 mils. 2. Topcoat shall be Carboline 133 HB Aliphatic Polyurethane Finish. The color shall be Forest Green. A minimum dry film thickness of 2 mils is required. I. Cutting or welding of fence panels in the field will not be allowed. J. Wood fence post shall be free of heart center, coastal Douglas Fir. Wood shall be fine grained, with at least eighty percent (80%) of the pieces possessing eight (8) annual rings to the inch; the remainder having at least six (6) annular rings to the inch. No loose knots, knotholes, or shake planer skips allowed in dressing. No unsound wood, white speck, or honeycomb allowed. Pressure Preservative Treatment: Timber shall be pressure impregnated with a boron-based compound equivalent in weight to six percent (6%) boric acid and six percent (6%) paraffin as a water-repellent addition. Wood preservatives containing toxic chemicals such as arsenic pentachlorophenol or creosote shall not be used. All timber posts shall be mechanically incised on all four (4) faces by uniform hydraulic pressure to a depth of 1/2” x 1/2” long. Incision shall begin at the bottom of the timber and end approximately one foot (1’) above grade. Full length incising is not acceptable as the perforations may cause slivering of surfaces. The incising pattern shall produce a minimum of 448 perforations per square foot. Application: Wood shall be pressure impregnated by the closed cylinder, vacuum pressure method as prescribed by the latest standards of the American Wood Preserver’s Association. Preservative treatment shall conform to AWPA Standard P9.
A. Fence: The fence shall be constructed in such a manner as to follow a smooth profile. In areas where the fence is installed on a slope greater than three percent (3%), the fence shall be stopped in uniform transition from one panel to the next over the grade length. In areas of fill slopes, the top of the fill shall be level for one foot (1’) on either side of the fence line. Grading for all specific conditions shall be such that water will not be allowed to pond in the immediate area of the fence. B. Posts: All posts shall be set plumb and shall be of uniform and equal height above ground. The attachment of fence panels shall be as shown on drawings. Post shall be tight fitting and secure. Type II backfill shall be compacted in six-inch (6”) lifts to ninety percent (90%) compaction. Contractor shall provide to Owner ten (10) wood fence posts. Contractor to deliver posts to the Public Transportation Department Maintenance Shop located at 3650A Tudor Road. Contact Alton Staff, Operations Superintendent, at 343-8230. C. Fence Panels: Fence panels shall be securely fastened to posts as shown on drawings. Fence panels which are bowed, contain surface irregularities, possess intermediate pickets not square, straight, or on center will be rejected and replaced without cost to the Owner. Fence panels shall be securely fastened to posts. Contractor shall provide to Owner ten (10) additional fence panels and all necessary hardware required to install panels. Contractor to deliver posts to the Public Transportation Department Maintenance Shop located at 3650A Tudor Road. Contact Alton Staff, Operations Superintendent, at 343-8230. D. Expansion Joints: Expansion joints shall be installed around fence posts that abut Portland Cement Concrete sidewalks. E. General Appearance: All runs of fence shall present the same general appearance through the project. The product of one manufacturer only will be accepted, except for items which do not influence the appearance of the complete fence. The fence shall be the product of a manufacturer who has demonstrated by actual installations of a similar nature that its product is of the type required. No used steel will be permitted.
Fence shall be measured per linear foot in place, along the center line of the fence from center of post to center of post. Measurement includes excavation, backfilling, compaction, and all items described in this Section complete in place. Extra fence components will be measured on a lump sum basis delivered. Article XX.5 Basis of Payment Payment for this item will be made in accordance with Division 10.00 Standard General Provisions, Section 10.07 Measurement and Payment of M.A.S.S. and shall include payment in full for all Work described under this Section. Payment will be made under the following units: ITEM UNIT Corridor Fence Linear Foot Extra Fence Components Lump Sum SECTION 70.YY Welded wire retaining wall with 24" lift (commercially galvanized wire) Article YY.1 Description This work shall consist of Welded Wire Retaining Walls constructed in accordance with these specifications and in reasonably close conformity with the lines, grades, design and dimensions shown on the plans or established by the Engineer. Article YY.2 Materials The Contractor shall make his own arrangements to purchase all welded wire wall materials, including wire mesh reinforcement mats, backing materials, and all necessary incidentals from Hilfiker Retaining Walls, 3900 Broadway, P.O. Box 2012, Eureka, CA 95502-2012, ph. 707/443-5093.
Wire mesh for facing shall be formed by a 90-degree bend of the soil wire reinforcement mesh and shall have a prebent tie to connect to the soil reinforcing mesh above. The reinforcing mesh shall be shop fabricated of cold drawn steel wire conforming to the minimum requirements of ASTM A-82 and shall be welded into the finished mesh fabric in accordance with ASTM A-185. Fabric shall be commercial galvanized (0.4 oz./SF) (125g/m2).
1. Backing Mat Where required, as shown on the plans, steel backing mat shall be W5 vertical x W2.5 horizontal (min.) (.258" [6.4mm] x .178" [4.5mm] nom. dia.) welded wire fabric meeting ASTM A-185 and commercially galvanized (0.4 oz./SF) (125g/m2). 2. Hardware Cloth Where required, as shown on the plans, metallic hardware cloth screen, with openings not exceeding 1/4” (6.35mm), shall be placed between the backfill and steel backing mat to retain the soil. Galvanization shall conform to ASTM A-123. Article YY.3 Select Granular Backfill Materials As shown on the plans, select granular backfill materials for the Welded Wire Wall structure shall be reasonably free from organic and otherwise deleterious materials and shall conform to the following gradation limits as determined by ASTM D-422: Sieve Size Percent Passing 6 inches (152.4 mm) 100 3 inches (76.2 mm) 100 - 75 No. 200 0 - 25* *If the percent passing the No. 200 sieve is greater than 15 percent, the backfill must conform to all of the following additional requirements: a. The Plasticity Index (P.I.), as determined by ASTM D-4318, shall not exceed 6. b. The fraction finer than 15 microns (0.015 mm), as determined by ASTM D-422 (AASHTO T-88) shall not exceed 15 percent. c. The material shall exhibit an angle of internal friction of not less than 34 degrees, as determined by the standard direct shear test (ASTM D-3080-72) (AASHTO T-236), utilizing a sample of the material compacted to 90% percent of ASTM D-1557-92, at optimum moisture content. In addition, backfill materials shall also meet the following corrosion requirements: Resistivity > 3000 OHM Centimeters (Min.) (CA-DOT 643) pH 5.0 to 10.0 (CA-DOT 643) Chlorides < 200 mg/kg (ppm) (CA-DOT 422) Sulfates < 1000 mg/kg (ppm) (CA-DOT 417) Backfill not conforming to this specification shall not be used without written consent of the Engineer. The Contractor shall furnish to the Engineer a Certificate of Compliance certifying that the select granular backfill material complies with this section of the specifications. A copy of all test results performed by the Contractor, which are necessary to assure compliance with the specifications, shall be furnished to the Engineer. The frequency of sampling of Select Granular Backfill necessary to assure gradation shall be directed by the Engineer. Article YY.4 Construction Requirements A. Wall Excavation Wall excavation shall be in accordance with the requirements of general specifications and in reasonably close conformity with the limits and construction stages shown on the plans. All excavation cuts and slopes shall be in accordance with OSHA regulations. Vertical cuts greater than 5 feet and steepened slopes grater than 20 feet must be designed by a registered professional engineer. B. Foundation Preparation The foundation for the structure shall be graded level for a width equal to or exceeding the length of the reinforcement mat or as shown on the plans. Prior to wall construction, the foundation, if not in rock, shall be compacted, as directed by the Engineer. Any foundation soils found to be unsuitable shall be removed and replaced, as directed by the Engineer. C. Wall Erection Wire mesh reinforcement mats, and applicable facing materials, shall be placed in successive horizontal lifts in the sequence shown on the plans as backfill placement proceeds. Vertical tolerance (plumbness) and horizontal alignment tolerance shall not exceed one and one-half (1-1/2) inches (38 mm) when measured at the junction of the wire facing and soil reinforcement along a 10-foot (3 m) straight edge. Backfill placement shall closely follow erection of each course of reinforcement mats. Backfill shall be placed in such a manner as to avoid any damage or disturbance to the wall materials or misalignment of the facing. Any wall materials that become damaged or disturbed during backfill placement shall be either removed and replaced at the Contractor's expense or corrected, as directed by the Engineer. Backfill shall be compacted to 95 percent of the maximum density as determined by ASTM D-1557-92 (AASHTO T-99 Method C or D). The moisture content of the backfill material prior to and during compaction shall be uniformly distributed throughout each layer. Backfill material shall have a placement moisture content less than or equal to the optimum moisture content. Backfill material with a placement moisture content in excess of the optimum moisture content shall be removed and reworked until the moisture content is uniformly acceptable throughout the entire lift. The optimum moisture content shall be determined in accordance with ASTM D-1557-92. Backfill shall be placed in complete horizontal lifts. The maximum lift thickness after compaction shall not exceed twelve (12) inches (305 mm). The Contractor shall decrease this lift thickness, if necessary, to obtain the desired density. Compaction within 3'-0" (.914 m) of the backface of the wall facing shall be achieved by at least three (3) passes of a lightweight mechanical tamper, roller or vibratory system. No soil density tests shall be taken within this area. At the end of each day's operation, the Contractor shall slope the last level of backfill away from the wall facing to rapidly direct run-off of rainwater away from the wall face. In addition, the Contractor shall not allow surface run-off from adjacent areas to enter the wall construction. Article YY.5 Method of Measurement A. Wire Wall Materials The unit of measurement for furnishing and fabricating all materials for the walls, including wire mesh reinforcement mats, applicable backing materials and other incidentals will be the square foot of wall surface area. The quantity to be paid for shall be measured on the basis of wall face area shown on the plans. Measurement and payment for excavation and backfill performed during Welded Wire Wall (ERS) construction will be in accordance with the applicable sections of the contract specifications. B. Wall Erection The unit of measurement for wall erection will be the square foot of wall surface area complete and in place. The quantity to be paid for will be the actual quantity erected in place at the site. Payment shall include compensation for all labor and materials required to prepare the wall foundation, place the reinforcement mats and position the backing mats and screens as shown on the plans. This information is proprietary to Hilfiker Retaining Walls and shall not be reproduced without written permission. Hilfiker Retaining Walls, P.O. Box 2012, Eureka, CA 95502-2012, Telephone 707/443-5093. HILFIKER RETAINING WALLS ARE COVERED BY ONE OR MORE OF THE FOLLOWING PATENTS: 3,631,682 4,068,482 4,329,089 3,922,864 4,117,686 4,324,508 243,697 4,051,570 4,343,572 243,613 4,266,890 4,391,557 4,154,554 4,260,296 4,505,621 OTHER PATENTS PENDING SECTION 70.ZZ WEIR Article ZZ.1 General The Work under this Section consists of furnishing all materials, tools, and equipment and performing all operations pertaining to the construction and installation of the weirs in accordance with the Drawings. Article ZZ.2 Materials Contractor shall provide new, undamaged materials as specified on the Drawings and in these Specifications.
Contractor shall provide hot-dipped galvanized hardware, including connectors, bolts, nails, washers, and nuts. Where bolting is required, Contractor shall supply galvanized 3/8-inch lag bolts as specified on the Drawings. Each lag bolt shall have the appropriate size galvanized washer for the lag bolts.
Contractor shall supply rough-sawn pressure-treated timbers, treated all sides, of the dimensions shown on the Drawings. Contractor shall ensure that the wood is preserved and treated in accordance with the processes of AASHTO M133 and Best Management Practices (BMPs) for the use of Treated Wood in Aquatic Environments, published by the Western Wood Preservers Institute, 601 Main Street, Suite 405, Vancouver, WA 98660 (phone: 800-279-9663). Contractor shall provide the timbers in accordance with the Drawings for the Outfall Weir.
Contractor shall supply galvanized steel of the dimensions and thickness shown on the drawings. Contractor shall bolt the steel to the weir timber with the angled edge on the south side of the weir or as directed by the Engineer. Contractor shall supply two galvanized steel Channels of the dimensions shown on the Drawings. Contractor shall bolt the Channels to the weir timbers as shown on the Drawings or as directed by the Engineer.
Contractor shall furnish and place class 1 riprap as specified in the Drawings, in accordance with M.A.S.S. and these Special Provision.
Contractor shall furnish and install Geotextile, as specified in the Drawings, in accordance with M.A.S.S. Article ZZ.3 Construction Contractor shall install the Weir in accordance with the Drawings or as directed by the Engineer. Contractor shall ensure that all wood members are level. Bolt head shall make full contact with the washer and the washer shall make full contact with the wood surface after the lag bolt is turned into place. Contractor shall join the horizontal members of the Weir in accordance with the Drawings or as directed by the Engineer. Contractor shall construct the berms over the ends of the weir timbers, as shown on the Drawings. The nose of the berms shall be wrapped in separation geotextile and covered with class 1 riprap (12-inch depth) as shown on the Drawings.
Weirs shall be measured as units complete in place, all required materials except class 1 riprap are incidental, no separate payment will be made. Article ZZ.5 Basis of Payment Payment for this Work shall be in accordance with M.A.S.S. Section 10.07 Measurement and Payment, and shall include full payment for all Work as described in this Section. Payment shall be made under the following unit: ITEM UNIT Construct Weir Each Yüklə 248,75 Kb. Dostları ilə paylaş:
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