Attachment_1_-_Statement_of_Work_(Revised).doc

EOD FENCE

STATEMENT OF WORK

FOR

MINOT AIR FORCE BASE

NORTH DAKOTA

24 September 2014

BASE FENCING

TABLE OF CONTENTS

SECTION 1.0 GENERAL REQUIREMENTS

1.1 Description of Work

1.2 Government Furnished Utilities

1.3 Government Furnished Equipment and Materials

1.4 Clean-Up and Restoration

1.5 Minot Air Force Base Proper

1.6 Warranty

SECTION 2.0 CHAIN LINK FENCE

2.1 Scope

2.2 Reference Standards

2.3 Materials

2.4 Chain Link Fence Construction

2.5 Interior Post Setting

SECTION 3.0 CONCRETE

3.1 General

3.2 Materials

3.3 Construction Requirements

APPENDIXES

APPENDIX 1. Details and Drawings ATTACHMENT 1. Minot AFB Chain Link Fence Details A1-1 Corner Post, Brace Post, Line Post, and Fence Section

A1-2 Double Swing Gate with Drop Rod Closure

A1-3 Post, Top Brace Rail, Tension Band, Barbed Wire and Outrigger

BASE FENCE

SECTION 1.0 - GENERAL REQUIREMENTS

1.0. GENERAL REQUIREMENTS. The Contractor shall provide all management, labor, materials, equipment, and fuel necessary to provide general fence construction.

1.1. DESCRIPTION OF WORK. Work includes all labor, material, and post-hole concrete needed to install a chain link fence for the EOD range. This fenced in area will consist of 4,270 LF of 6' chain link fence with top and bottom tension wire, braced corner, end and gate post with two 16' double drive gates as shown on the diagram (Attachment 3 – EOD Fence Layout).

1.1.1. WORK ORDERS. The Contractor shall not exceed the quantity of work detailed in the work order without receiving prior authorization from the Contracting Officer. Work accomplished in excess of that specified in the work order without prior approval shall be at the contractor’s expense.

1.2. GOVERNMENT-FURNISHED UTILITIES. No utilities will be provided by the Government.

1.3. GOVERNMENT-FURNISHED EQUIPMENT AND MATERIALS. No equipment or materials will be furnished by the Government.

1.4. CLEAN-UP AND TURF RESTORATION.

1.4.1. SITE CLEANUP. This shall consist of cleanup on a daily basis to keep the work site free from debris and waste material resulting from in-progress work and clean-up required at the end of the project. Cleaning shall include removal of debris, removal of temporary protection and labels not required to remain, clean finishes free of dust, stains, films and other foreign substances, remove waste, and surplus materials from site. Clean ground, police area to remove all garbage (i.e., pop cans, cigarette butts, etc.) created or left by workmen; remove stains, spills, and foreign substances from paved areas and sweep clean. All materials removed, all surplus material and debris, unless designated for salvage by the government, shall become the property of the Contractor and shall be removed and disposed of by the Contractor off-site (Minot Air Force Base and associated missile sites) at the expense of the Contractor and in accordance with Federal and State law and regulations, local ordinances, and agreements with landowners. Site cleanup shall be included in the Contractors installation fees as detailed in the approved bid schedule line items. No additional fees will be paid to the Contractor by the Government for site cleanup.

1.4.2. TURF RESTORATION. The Contractor shall restore and repair site turf grounds damaged and/or excavated during construction to include removal of exposed rocks, topsoil replacement to a minimum depth of four inches, seeding, and watering to establish growth as required to produce level stand of grass to match adjacent undamaged/un-repaired stand of grass in density and height. Turf restoration shall be included in the Contractors installation fee as detailed in the approved bid schedule line items. No additional fees will be paid to the Contractor by the Government for turf restoration.

1.5. MINOT AIR FORCE BASE PROPER.

1.5.1. CONTRACTOR'S WORK HOURS. Working hours for the Contractor shall normally be between the hours of 7:30 a.m. and 4:30 p.m., excluding Saturdays, Sundays, and Federal holidays

1.5.2. PERMITS.

1.5.2.1. WELDING. When any welding, cutting, brazing or use of any open flame device is to be used, an AF Form 592 permit shall be obtained from the Base Fire Department, 320 Flight line Drive, prior to beginning such work. Fire department can be reached at PH # 723-2461. During such work, a fully charged and operable fire extinguisher, appropriate for the task, shall be provided by the Contractor.

1.5.2.2. WORK CLEARANCE REQUEST.

1.5.2.2.1. WORK CLEARANCE REQUEST. Before any excavation, alteration, or other construction work is begun, the Contractor shall obtain and fully process an AF Form 103, Base Civil Engineering Work Clearance Request. The form requires extensive coordination with several base agencies, including furnishing all locations, detailed information, and sketches regarding any proposed excavation(s).

1.5.3.2.2. PROTECTION OF EXISTING UTILITIES. The Contractor shall safeguard and protect from damage all utilities encountered or uncovered during digging, excavation, and backfilling. Damage to utilities by the Contractor on correctly located utilities by Minot AFB personnel or utility locating companies coordinated by the Contractor shall be the responsibility of the Contractor. Damage to utilities by the Contractor on incorrectly located utilities by utility locating companies coordinated by the Contractor shall be the responsibility of the Contractor. Damage to utilities by the Contractor on incorrectly located utilities located by Minot AFB personnel will be the responsibility of the Government.

1.6. WARRANTY. The Contractor shall provide one (1) year against defects in workmanship, materials, and component failure due to improper surface preparation or product installation. Any applicable product manufactures warranties shall remain in full effect. This statement applies to all products installed by the Contractor in addition to any specific product requirements outlined in this Statement of Work.

END OF SECTION 1.0

BASE FENCE

SECTION 2.0 – CHAIN LINK FENCE & GATES

2.1. SCOPE. Work in this section covers the replacement, repair, and construction of chain link fence and gates to include all pertinent accessories to complete all work.

2.2. REFERENCE STANDARDS.

2.2.1. FEDERAL SPECIFICATIONS (FS).

RR-F-191 General

191/1 Fence Fabric

191/2 Gates

191/3 Rails/Top Posts/Braces

191/4 Accessories

FF-N-105 Fasteners

MIL-HDBK-1013/10 Design Guidelines for Security Fencing, Gates, Barriers, and Guard Facilities

2.2.2. AMERICAN SOCIETY for TESTING and MATERIALS (ASTM).

ASTM F567

Installation of Chain-Link Fence

ASTM A120

Pipe, Steel, Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless, for

Ordinary Uses

ASTM A121

Zinc-Coated (Galvanized) Steel Barbed Wire

ASTM A123

Zinc-Coated (Galvanized) Coating on Products Fabricated form Rolled, Pressed and

Forged Steel Shapes, Plates, Bars and Strip

ASTM A153

Zinc-Coated Steel Chain-Link Fence Fabric

ASTM A90

Test for Weight of Coating on Zinc-Coated (Galvanized) Iron or Steel Articles

ASTM B429

Aluminum-Alloy Extruded Structural Pipe and Tube

ASTM A641

Zinc-Coated (Galvanized) Carbon Steel Wire

ASTM D1248 Polyethylene Plastics Molding and Extrusion Materials

2.3. MATERIALS.

2.3.1. GALVANIZED METAL. All ferrous materials shall be new and galvanized. Imperfectly galvanized materials or materials upon which serious abrasion of the galvanizing occurs shall not be used. All ferrous metal used, unless specified otherwise, shall be hot-dip zinc coated with not less than 1.2 ounces of zinc per square foot.

2.3.2. FABRIC. Chain link fabric shall be woven with a nine (9) gauge galvanized steel wire in two (2) inch mesh. Fabric shall be coated with not less than 1.2 ounces of zinc per square foot and shall meet the requirements of RR-F-191. Top and bottom salvages shall have a twisted and barbed finish.

2.3.3. POSTS, RAILS, AND BRACES. Posts, rails and braces for chain link security fence shall be steel pipe and meet the requirements of RR-F-191, Class 1, grade A or B. Galvanized steel pipe shall be continuous span. No sleeves or welded splices are allowed. The minimum requirements for the outside diameter (X) wall thickness in inches are as follows:

a. Line Post

2.375 x 0.130

b. Gate Post (Gate Leaf Less than or Equal to 12’)

4.0 x 0.160

c. Gate Post (Gate Leaf Greater than 12’)

6.625 x 0.160

c. Brace Rail (ang.)

d. Corner Post

2.875 x 0.160

e. Brace Rail (hor.)

1.660 x 0.111

f. Gate Frame

1.90 x 0.120

g. Temporary Post

h. Brace Post

2.375 x 0.160

i. Pull Post

2.875 x 0.160

j. End Post

2.875 x 0.160

k. Top/Bottom Rail

1.66 x 0.111

2.3.4. WIRE TIES. Wire ties shall be a nine (9) gauge zinc-coated galvanized steel wire. Hog rings shall be nine (9) gauge galvanized steel wire. The minimum weight for zinc coated wire ties is 0.8 ounces of zinc per foot of coated surface area. Wire ties shall not fracture when tested as follows: bend wire from which ties are formed through an angle of 180 degrees on mandrel having the same diameter as the wire under test.

2.3.5. TENSION WIRE. Tension wire shall be seven (7) gauge coiled spring wire conforming to RR-F-191 and have minimum tension strength of 75,000 pounds per square inch.

2.3.5.1. At the discretion of the Government tension wire may be spliced using crimp type connectors. Use the following or approved equal sleeves and crimping tool. NICOPRESS brand crimping sleeves 7 gauge wire part# FW-5-6, and NICOPRESS brand crimping tool part# 3-56 may be used for splicing tension wire. Each crimp connector will be installed with a manufacturer approved crimping tool, and crimped the recommended number of times. Two crimping sleeves per lap splice on barbed wire, and three crimping sleeves per tension wire lap splice will be used; see appendix 4 for further information.

2.3.6. TENSION BARS. Tension bars shall be galvanized steel with a cross-sectional area of not less than 3/16 inch by 3/4 inch, or equivalent. Tension bands shall be galvanized steel and 3/4 inch wide by 1/10 inch thick nominal size.

2.3.7. OTHER HARDWARE. Tension rods, gate hinges, eye-bolts, J-bolts, nuts, and other fasteners or devices used in fence construction shall be galvanized steel.

2.3.8. CONCRETE. Concrete shall meet the requirements of Section 3.0.

2.3.9. BARBED WIRE. Barbed wire shall consist of two twisted strands of 12 ½ gauge line wires with 14 gauge round barbs. All barbs shall be four (4) point with barbs on not more than five (5) inch centers. Barbed wire outrigger arms shall be single arm for three (3) wire strands. When installed, the barbed wire outrigger arms shall project at an angle of 45 degrees from the plane of the fence line and the outer strand of barbed wire shall be positioned approximately twelve (12) inches horizontally from the fence line. Intermediate strands of barbed wire shall be uniformly spaced between the strand on the end of the support arm and the fence fabric. All outrigger arms shall be fitted with clips or slots for attaching the barbed wire to the support arm. Outrigger arms shall be capable of withstanding a load of 250 pounds applied at the outer strand of barbed wire.

2.3.10. FENCING SLATS. Privacy/Security fencing slats shall be of solid or extruded design that once installed, shall obscure view past the fence it is installed in. Slats shall be pre-cut in lengths to fit all specified fence heights. Slats shall not rot, water stain, chip, crack or break, and shall withstand temperature extremes, detergent, and harsh chemicals. Color of slats to be used shall be chosen by the Contracting Officer or delegated representative. Slat installation shall result in straight, even alignment with both top and bottom of chain link fence fabric.

2.3.11. GROUNDING. Grounding there are 2 types of grounding systems. At a MAF or LF Steel wire for repair of grounding system shall be seven (7) strand wire rope with an overall diameter of 1/2 inch. Wire shall conform to ASTM designation A-641, carbon steel, galvanized. Wire shall be enclosed in a polyethylene sheath, conforming to ASTM designation D 124B, Type III, Grade 3, Class B, of 4-mil minimum thickness, free of all air bubbles, breaks, leaks, and non-uniformity in dielectric strength. All connections shall be cad welded and taped. Base side fence grounding will be in accordance with the National Electric Code. Using 3/4” diameter, 10’ long, copper coated steel ground rods, #4 stranded copper wire; utilizing approved clamps for the ground rod and fence post connection.

2.3.12. TEMPORARY SECURITY FENCING. At the discretion of the government, the integrity of the site security fence must be restored by the end of each day’s work. If it is not possible to complete the items being worked, then a temporary security fence shall connect to the existing fence with no openings. Temporary fence shall meet the same standards as permanent fence, except that the animal barrier, when applicable, may be omitted when fabric is set tight against the ground and fence posts with four (4) foot minimum depth into the ground and fifteen (15) foot maximum interval may be used. Every effort shall be made to minimize the length of time temporary fence is utilized.

2.4. CHAIN LINK FENCE CONSTRUCTION/INSTALLATION.

2.4.1. FENCE LINE. The Contracting Officer’s designated representative will mark or identify the items of work to be accomplished at the start of construction at each site. Install fence and accessories in accordance with fence manufacturer’s written installation instructions except as modified herein including the attached fence detail drawings. The finished fence shall conform to the alignment indicated by the Contracting Officer’s representative. .All trees, brush, and other debris that might interfere with the installation of the fence shall be removed. The grading and leveling of existing ground by adding or taking away soil, along the fence line for new construction, may be required to keep the distance from the bottom of the fence fabric and the ground to meet the requirement in this statement of work.

2.4.2. PROTECTIVE COATING. Galvanized metal that has been damaged by torch or by welding, or miscellaneous metal used in repair or modification, shall be cold galvanized in the field. All metal to receive cold galvanizing shall be thoroughly cleaned by wire brush. Immediately after cleaning a coat of paint consisting of Devcon Z Cold Galvanizing Compound No. 12000 with 95 percent pure zinc in the dried film, or Rust-Oleum No. 2185 Cold Galvanizing Compound or equal containing over 93 percent pure zinc in the dried film shall be applied. A coat of aluminum paint as made by Rust-Oleum or equal shall be applied after the cold galvanizing has dried.

2.4.3. POST SPACING. Do not exceed 500 feet on straight runs between braced posts. When any straight line linear fence measurement is greater than 500’, a pull post shall be installed with a brace post on either side. If the linear fence measurement is less than 1000’ then a pull post will be installed at midpoint. Ex. If you have 700’ of linear fencing, there will be a pull post installed at approximately 350’ with a brace post on either side. Provide line posts spaced equidistantly apart, not exceeding 10 feet on center. Provide corner or pull posts, with bracing in both directions, for changes in direction of 15 degrees or more, or for abrupt changes in grade.

2.4.4. POST SETTING. Install, remove, and replace existing posts as directed. Posts shall be a continuous length with no splices. Ensure proper alignment of new posts. Posts shall be set plumb and sufficiently long so that the top of the fence is approximately level on any given straight run of fence. Holes created by removal of existing posts shall be filled with compacted earth prior to installation of a new post in the same location. Compact earth in lifts not greater than eight (8) inches. All posts shall be set into the ground a minimum of six (6) feet..Gate, corner, end, pull, and brace posts shall be set in concrete as indicated in the drawings. Allow concrete to cure a minimum of 72 hours before performing other work on posts. Concrete forming tubes shall be used for all concrete placements.. The tubes will extend above grade 1 ½” and below grade 10 ½”. Compact concrete to eliminate voids by tamping or vibrating... Placing the upper layers of concrete against the excavated hole will not be allowed. Crown top of concrete above grade and trowel outside edge to existing grade for water shed. A mechanical device shall be used for driving in line posts. Post tops shall be protected from mushrooming, or the excess length and mushroomed top of a driven line post be cut off. Under no circumstances will the use of explosives be permitted.

2.4.5. BRACING. All gate, corner, end, and pull posts shall be braced to a brace post with a horizontal brace rail used as a compression member, placed at least 12 inches below the top of the fence. Diagonal steel truss rods (3/8 inch) shall be used as tension members and attached at the bottom of the corner or pull post to the adjacent brace post where the horizontal brace rail terminates. Each 3/8 inch steel truss rod shall be banded to the post and equipped with a turnbuckle or truss tightener with tensile strength equal to the truss rod. All clamps, bands, or other devices used to attach compression members shall be firmly attached to the post by shot nailing, or tack welding to prevent rotation. Any damaged galvanized coating from welding will be repaired in accordance with section 2 para. 2.4.2

2.4.6. TOP AND BOTTOM RAIL. Top rail, where used, shall be supported at each post to form a continuous brace between terminal posts. Where required, sections of top rail shall be joined using sleeves or couplings that allow expansion or contraction of the rail. Bottom rail where used, shall be bolted to double rail ends and double rail ends shall be securely fastened to the posts. Bolts shall be peened to prevent easy removal. Bottom rail shall be installed before chain link fabric.

2.4.7. TOP AND BOTTOM TENSION WIRES. (Installed where top and bottom rail is not required by specific project) shall be installed prior to the installation of chain link fabric and shall be pulled taut and will be free of sag. Place top and bottom tension wires within 8 inches of respective fabric line. At the discretion of the Government tension wire may be spliced using crimp type connectors. See section 2 para. 2.3.5.1 for crimping details. Weave the tension wire through the post caps. Each end and corner post shall have a wire stretching eye bolt.

2.4.8. FABRIC. Chain link fabric shall be attached to end and corner posts with tension-bars and tension-bar bands. Tension bars shall be a continuous length compatible with the height of the fence and shall be threaded through the fabric and attached to the post by tension bands. The tension bar shall engage each link in the fence fabric. Tension bands shall be used for securing chain link fabric at each end, and corner post. Tension bands on posts shall be spaced at twelve (12) inch intervals or less and located not more than four (4) inches from the top and bottom of the post. Install fabric on opposite side of posts from the area being secured. Install fabric so that the bottom of the fabric is no less than 1 inch and no more than 2 inches above ground level. Chain link fabric shall be fastened to line posts with nine (9) gauge galvanized steel tie wires with a minimum of two twists at fourteen (14) inch intervals. Tie wire shall encompass two (2) strands of fence fabric. Chain link fabric shall be attached to the top and bottom tension wires and truss rods with nine (9) gauge hog rings at fourteen (14) inch intervals. Chain link fabric shall be attached to the top and bottom rails (where used) with nine (9) gauge galvanized steel tie wires with a minimum of two twists at (24) inch intervals. The Contractor may use an electric drill to tie steel tie wires.

2.4.9. POST TOPS AND OUTRIGGERS. Metal post tops and outriggers shall be installed on security fence posts by shot nailing or spot welding. Repair galvanized coating in accordance with section 2 para. 2.4.2 and cold galvanizing as shown in the drawings and barbed wire shall be installed on the outriggers above fence posts

2.4.9.1. BARBED WIRE. On new installations barbed wire shall be installed in such a manner as to minimize the number of splices required. For repair of barbed wire, lap splices utilizing the following crimping sleeves and crimping tools or an approved equal crimp type connectors designed for barbed wire will be used. NICOPRESS brand barbed wire crimping sleeve part# FT-4-5 using a NICOPRESS crimping tool part# 64-2345 or FT-2345 will be used for splicing. In both installations each strand of barbed wire will be pulled tight with an appropriate mechanical devise. Two each crimping sleeves per splice will be used per splice; see appendix 4 for further information. Barbed wire will be securely fastened to out riggers as recommended by the manufacturer.

2.4.10. FENCE HEIGHT. Fence height will be measured from ground level to top of the fence fabric.

2.4.11. GROUNDING. The type of grounding installed will be location specific. See section 2 para 2.3.11.

See appendix 1 for work base side grounding detail.

2.4.12. SIGNS. All signs or other hardware attached to the existing fence or gates shall be relocated to the new fence or gate and attached in a similar manner. New signs on newly installed fence will be provided by the Government. Location of signs on newly installed fence shall be coordinated with the Contracting Officer’s representative before installation.

2.5. INTERIOR POST SETTING. Install, remove, and replace new or existing posts as directed. Posts shall be a continuous length with no splices. Posts shall have a base plate wielded to the bottom of the post being installed. The base plate shall be a minimum of 8”X8”X3/8” thick. Larger base plates may be used if required for secure mounting of the post being installed. Base plates shall be secured to the floor surface using Titan HD concrete anchors with a 3/8” X 3” minimum lag bolt size. Ensure proper alignment of all posts being installed.

END OF SECTION 2.0

BASE FENCE

SECTION 3.0 – CONCRETE

3.1. GENERAL. This item shall consist of either plain or reinforced Portland Cement Concrete, which is composed of coarse aggregate, fine aggregate, Portland cement, water and permitted admixtures. Only approved materials conforming to the requirements of these specifications shall be used in the work. Materials may be subjected to inspection and test at any time during the progress of their preparation or use. In no case shall the use of pit-run or naturally mixed aggregates be permitted. All fine and coarse aggregates shall be stored separately and kept clean.

3.2. MATERIALS.

3.2.1. CEMENT. Cement shall be high-early-strength ASTM Type III or IIIA.

3.2.2. FINE AGGREGATE. Except as noted herein, the fine aggregate shall conform to the requirements of ASTM C33. Fine aggregate shall be natural sands washed clean, consisting of hard, strong, sharp uncoated grains, free of dust, lumps, mica, shale, organic matter or other deleterious substances. Fine aggregate shall be graded within the following limits when tested in conformity with ASTM C136:

3.2.3. COURSE AGGREGATE. Except as noted herein, the coarse aggregate used shall conform to the requirements of ASTM C33. Coarse aggregate shall consist of gravel or broken stone, composed of strong, hard, durable, uncoated pebbles or rock fragments, washed clean, and free from injurious amounts of shale, coal, clay, lumps, soft fragments, dirt, glass, organic or any other deleterious substances. Coarse aggregate shall be graded within the following limits when tested in conformity with ASTM C136:

3.2.4. WATER. Water used in concrete shall be clean and free from injurious amounts of oils, acids, alkalis, salts, organic materials, or other substances that may be deleterious to concrete or reinforcement.

3.2.5. ADMIXTURES. Substances other than cement, water, aggregates, and air-entraining agents shall not be used in concrete except as otherwise approved by the Contracting Officer. Permission to use any admixtures may be withdrawn at any time if the properties of the admixture are not uniform or if satisfactory results are not being obtained. Should the Contractor request and obtain permission to use admixtures for his own benefit, no additional compensation will be allowed for the cost of furnishing the admixtures and incorporating them into the concrete mixture.

3.3. CONSTRUCTION REQUIREMENTS.

3.3.1. CONCRETE MIX. The concrete mix shall contain not less than six (6) sacks of cement per cubic yard and not more than 6.25 gallons of water per sack of cement. The 28 day compressive strength (ASTM C192 & C39) shall not be less than 3000 psi. The maximum allowable slump (ASTM C143) of the concrete mix shall be three (3) inches. The air content (ASTM C231) of the mix shall fall within the range of three (3) percent to six (6) percent. The amounts and proportions of fine and coarse aggregates to be used in each mix shall be such as to produce a plastic, workable, mix, free from harshness, which can be readily placed into the corners and angles of the forms and around reinforcement and other embedded work without undue accumulation of water on the surface, and such that there will be no honeycombing in the structure.

3.3.2. CONCRETE FORMING TUBES. Concrete forming tubes shall be used on all installations requiring concrete. This includes galvanized and vinyl fence posts as well as I-beams. The concrete forming tube will extend above final grade 1 ½” and below grade 10 ½” as specified by detail drawing. Posts or I beams will be centered in the concrete form. Concrete will be mechanically compacted with a vibrator after it is poured. The concrete will be finished smooth with a trowel and crowned ¼” per foot to allow water shed away from post or I-beam. All posts shall be set plumb and to the required grade and alignment. No material shall be installed on the posts or I- beams nor shall they be disturbed in any manner within 72 hours of pouring concrete. After the 72 hour cure time; the concrete forming tubes will be removed to a point where they are not visible above final grade. The remaining forming tube may be left in place below grade to decompose naturally.

3.3.3. CONCRETE PLACEMENT. All concrete shall be placed during daylight, unless otherwise approved. All water shall be pumped from post holes prior to concrete placement. Concrete shall be placed as soon as practical after mixing and in no case later than one (1) hour after water has been added to the mix. The method and manner of placing shall be such to avoid segregation and displacement of the reinforcement. The concrete shall be consolidated by suitable mechanical vibrators, or other methods approved by the Contracting Officer. When necessary, vibrating shall be supplemented by hand tamping with suitable tools to assure proper and adequate consolidation. Before placing concrete, any items that are to be embedded shall be firmly and securely fastened in place as indicated. All such items shall be clean and free from rust, scale, oil, or any foreign matter. All concrete shall be installed in one continuous pour completely filling holes. No partial pours will be accepted.

3.3.4. ENVIROMENTAL CONDITIONS. Concrete shall not be placed when the atmospheric temperature is below 40 degrees or when there is a probability the temperature will go below that in the next twenty-four (24) hours unless the concrete is protected in a manner suitable to the Contracting Officer or his designated representative. Frozen concrete shall be immediately removed upon direction of the Engineer and replaced with new work at no expense to the government.

END OF SECTION 3.0

A1-1

A1-2

EMBED AutoCAD.Drawing.15

A1-3

NOTES

All brace bands will be tack welded or shot nailed

Concrete forming tubes will be used for post installations.

Concrete forming tubes will extend 1 ½” above and 10 ½” below final grade

Gates will have box slide latches installed

New installs will include a gate keeper for each gate leaf

Industrial Butt Hinges will be used

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