34_71_13.02_16.pdf

CP#2 Long Range Discrimination Radar (LRDR) CLR039b LRDR Complex Security - Clear AFS, Alaska AM#3

SECTION 34 71 13.02 16

VEHICLE CRASH BARRIERS

02/15

PART 1 GENERAL

1.1 SECTION DESCRIPTION

This specification is for passive vehicle barriers, traffic control boulders, and traffic control bollards. Passive vehicle barriers are precast concrete barriers, boulder barriers, and bollard array.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A53/A53M (2012) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A615/A615M (2015a) Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ASTM C127 (2015) Standard Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate

ASTM C131/C131M (2014) Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C535 (2012) Standard Test Method for Resistance to Degradation of Large-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C94/C94M (2015) Standard Specification for Ready-Mixed Concrete

ASTM D1557 (2012; E 2015) Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)

ASTM D638 (2014) Standard Test Method for Tensile Properties of Plastics

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ASTM D746 (2014) Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact

ASTM D790 (2016) Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, the "LD" designation following the "G" identifies that a Government-provided LEED Coordinator will review the submittal.

Submittals with an "S" are for inclusion in the Sustainability Notebook, in conformance to Section 01 33 29.02 00 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00.02 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Passive Vehicle Barrier Precast Concrete; G

SD-03 Product Data

Rock Type Quarry Location Bollard Pipe Bollard Sleeve Bollard Concrete Bollard Concrete Steel Reinforcement

SD-06 Test Reports

Bulk Specific Gravity for Rock Wear Test for Rock

PART 2 PRODUCTS

2.1 PASSIVE VEHICLE BARRIER PRECAST CONCRETE

Provide precast concrete passive vehicle barriers from a precast concrete product manufacturer. Concrete and steel reinforcement shall meet the requirements of Section 32 16 13.02 00 CONCRETE SIDEWALKS AND CURBS AND GUTTERS, paragraphs CONCRETE and REINFORCEMENT STEEL, and Part 3 Execution, paragraph CONCRETE TESTING, subparagraphs Strength Testing, Air Content, and Slump Test. Steel reinforcement shall have a yield strength of at least 60,000 psi and shall be deformed type. Provide ASTM A153/A153M hot-dipped galvanized steel or Type 304 stainless steel lifting point anchor inserts. Insert is to reside below the concrete surface as shown in the drawings. Steel reinforcement shown in the drawings is for crack control only. The precast product manufacturer provides design and shop drawings for lifting points, steel reinforcement for lifting and transport, and a rigging diagram for barrier lifting.

2.2 PASSIVE VEHICLE BARRIER BOULDERS

Provide igneous rock, not weathered or fractured, preferably basalt or granite. Specific gravity and wear tests determined using samples

SECTION 34 71 13.02 16 Page 2 produced from crushed rock. Wear test per either ASTM C131/C131M or ASTM C535. All rock must have similar texture and color, originate from the same quarry, and meet the following requirements:

a. ASTM C127 Specific Gravity: Minimum 2.6 bulk specific gravity.

b. ASTM C535 Wear Test: Maximum of 35 percent.

c. ASTM C131/C131M Wear Test: Maximum of 40 percent.

d. Minimum dimensions shown on the drawings.

2.3 TRAFFIC BARRIER BOULDER

Provide the same rock type as for the passive vehicle barrier. All rock must have similar texture and color and originate from the same quarry as the passive vehicle barrier rock. Minimum dimensions are shown on the drawings. Specific gravity and wear tests are not required.

2.4 BOLLARD PIPE

Provide ASTM A53/A53M, Grade A or B, hot-dip galvanized steel pipe. Pipe wall thickness must be at least 1/2 inch. Provide concrete fill for the pipe interior and footing.

2.5 BOLLARD SLEEVE

Provide a UV-stabilized HDPE bollard sleeve. Minimum 0.125 inch thick, ASTM D790 flexural modulus of 200,000 psi, ASTM D638 tensile strength of 4,000 psi, ASTM D746 brittleness temperature of -180 degrees F.

Reflective tape shall be an integral part of the factory-fabricated sleeve; sleeve shall have two 1-inch-wide bands of white reflective tape uniformly spaced 6 to 10 inches apart, with top band of reflective tape located 3 to 4 inches from top of cover. Factory-provided sleeve shall be long enough to be field-trimmed to match project's bollard height. AM#3...

Color: FSC 595B 23522. ...AM#3

2.6 BOLLARD CONCRETE

Provide concrete conforming to ASTM C94/C94M, with 5.5 sacks of Type I cement per cubic yard of concrete and obtaining a minimum 28-day compressive strength of 3,000 psi. Provide concrete testing as described in Section 32 16 13.02 00 CONCRETE SIDEWALKS AND CURBS AND GUTTERS, paragraphs STRENGTH TESTING and SLUMP TEST. Slump shall not exceed 3 inches or be less than 1 inch.

2.7 BOLLARD CONCRETE STEEL REINFORCEMENT

Steel reinforcement bar shall be ASTM A615/A615M , Grade 60, deformed type.

2.8 BOLLARD ARRAY

For the bollard array shown on the drawings, provide concrete, steel reinforcement, and sleeve as specified in this Section.

SECTION 34 71 13.02 16 Page 3

PART 3 EXECUTION

3.1 PASSIVE VEHICLE BARRIERS, BOULDER OR PRECAST CONCRETE

In the areas where passive vehicle barriers are placed, install barriers after the ground surface has been graded to the elevations shown on the drawings.

Excavate below finished grade to the extent required to set each barrier so that it does not exceed minimum and maximum distances above finished grade. After setting barriers to the alignment and separation shown on the drawings, restore grading around the barrier perimeter. Mechanically compact soil at accessible locations around the barrier perimeter to at least 95 percent of maximum ASTM D1557 density.

3.2 TRAFFIC BARRIER BOULDERS AT GRAVEL-SURFACED LOCATIONS

Install boulders after the ground surface has been graded to the elevations shown on the drawings.

Excavate below finished grade to the extent required to set each boulder so that it does not exceed minimum and maximum distances above finished grade. After setting boulders to the alignment and separation shown on the Drawings, restore grading around the boulder perimeter. Mechanically compact soil at accessible locations around the boulder perimeter to at least 90 percent of maximum ASTM D1557 density.

3.3 TRAFFIC BARRIER BOULDERS SET IN CONCRETE PAVEMENT

Excavate to the extent required to set each boulder so that it does not exceed minimum and maximum distances above grade as shown on the drawing.

Compact bottom of the excavation to at least 95 percent of maximum ASTM D1557 density. Set boulders to the alignment and separation shown on the drawings. To bring the boulder perimeter excavation to the pavement subbase elevation, use plain concrete for backfill.

3.4 BOLLARD

Coordinate bollard installation with fence, gate, sidewalk, curb and gutter,and pavement work. Excavate soil using either an auger or vacuum excavator to the extent shown in the drawings for the bollard foundation.

After aligning and supporting the steel pipe and associated steel reinforcement as shown in the drawing detail, backfill the excavation with concrete. Field-cast concrete directly against excavation surface.

Consolidate concrete with a concrete vibrator. Slope the top of concrete backfill away from the pipe wall at the slope shown in the drawing detail. Fill the pipe interior with concrete. At locations where a bollard is provided with a bollard sleeve, finish the top of the concrete fill flush with the pipe edge. At locations where a sleeve is not installed, provide a shallow dome transition between the pipe edge and top of concrete fill. The height of the dome shall be 25 percent of the pipe outside diameter. At locations where bollards are to be painted, as indicated in the drawings, paint bollards with one coat of primer and at least two coats of enamel paint. Paint color shall be as shown in the drawings. For galvanized surfaces, before applying the primer, prepare the surface with a wash primer applied to a dry film thickness of 0.3 to

0.5 mils.

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