SECTION 02851

STEEL GUARDRAIL

PART	GENERAL

SECTION INCLUDES

Steel guardrail and [wood] [steel] posts.

Excavating for post bases.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____-__________]: Placement of sleeves in concrete for guardrail support posts.

RELATED SECTIONS

Section 02222 - Excavating: Excavating for posts.

Section 02223 - Backfilling: Backfilling and compacting fill surrounding posts.

[Section 03300 - Cast-in-Place Concrete: Concrete foundation for posts.]

UNIT PRICE - MEASUREMENT AND PAYMENT

Guardrail:

Basis of Measurement: By the linear [foot] [________] ([meter] [________]).

Basis of Payment: Includes rail, accessories, end closures, finished.

Intermediate Posts:

Basis of Measurement: By the unit.

Basis of Payment: Includes excavating, [sleeving through concrete,] posts, backfilling and compacting at posts.

Terminal Anchor Posts:

Basis of Measurement: By the unit.

Basis of Payment: Includes excavating, [sleeving through concrete,] posts, anchors and anchor footings, backfilling and compacting at posts.

REFERENCES

AASHTO M180 - Corrugated Sheet Steel Beams for Highway Guardrail.

ANSI/ASTM A123 - Zinc (Hot Dip Galvanized) Coatings on Iron and Steel Products.

ASTM A36 - Structural Steel.

ASTM A153 - Zinc Coating (Hot-Dip) on Iron and Steel Hardware.

ASTM A428 - Weight of Coating on Aluminum-Coated Iron or Steel Articles.

ASTM A500 - Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Round and Shapes.

ASTM A501 - Hot-Formed Welded and Seamless Carbon Steel Structural Tubing.

ASTM C94 - Ready-mixed Concrete.

AWPA C14 - Wood for Highway Construction - Preservative Treatment.

SYSTEM DESCRIPTION

Guardrail Height: [Top of rail [____] inches ([____] mm) above [finish grade] [top of median barrier] [________].] [As indicated.]

Post Spacing: [At intervals not exceeding [10] [____] feet ([3] [____] m).] [As indicated.]

Post Foundation Depth: [[____] inch ([____] mm) below [finish grade] [top of median barrier] [________].] [As indicated.]

Post Foundation Diameter: [____] inch ([____] mm).

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate plan layout, spacing of components, post foundation dimensions, anchorage, and schedule of components.

Product Data: Provide data on rail, [posts,] accessories, hardware and structural capabilities of rail section.

Manufacturer's Installation Instructions: Indicate installation requirements [, post foundation anchor bolt templates] and [________________].

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code for rail height or location restrictions.

FIELD MEASUREMENTS

Verify that field measurements are as [indicated [on shop drawings]] [instructed by the manufacturer].

PART	PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

Substitutions: Under provisions of Section [01600] [________].

MATERIALS

Guardrail Beam: ASTM [A501 Hot Formed] [A500 Cold Formed] structural steel box section, [__x__] inch ([__x__] mm) size, [____] inch ([____] mm) wall thickness, punched or drilled holes for attachment to posts, steel spigot splice sections to fit inside dimensions of box beam for site joints, steel end closures.

****** [OR] ******

Guardrail Beam: ASTM A36 rolled steel sections, "W" profile, [____] inch ([____] mm) thick, [____] inch ([____] mm) high, die punched bolt holes for site assembly and attachment to posts, formed steel curved and flared termination sections.

****** [OR] ******

Guardrail Beam: AASHTO M180 Class [A] [B] Type [1] [2] [3] [4]; [W] [____] profile; rolled steel sections, die punched bolt holes for site assembly and attachment to posts, formed steel [curved] [tapered] terminating sections.

Steel Posts: ASTM [A501] [A500] [A36] structural steel sections, [__x__] inch ([__x__] mm) [size] [diameter], [____] inch ([____] mm) wall thickness.

****** [OR] ******

Wood Posts: Softwood timber, pressure preservative treated to [AWPA C14 using [creosote] [water borne] preservatives] [________], [8 x 8] [__x__] inch ([200 x 200] [__x__] mm) nominal size.

ACCESSORIES

Concrete: Type specified in Section [03300.] [________.]

****** [OR] ******

Concrete: [ASTM C94;] [Normal] [Sulfate Resisting] [________] Portland Cement, [2,500] [____] psi ([17] [____] MPa) strength at 28 days, [3] [____] inch ([75] [____] mm) slump; [____] inch ([____] mm) nominal sized coarse aggregate.

Hardware: Steel, bolts, nuts and washers to suit rail profile.

FINISHES

Components: Galvanized to ANSI/ASTM A123; [1.8] [2.0] [____] oz/sq ft ([550] [600] [____] g/sq m) coating.

****** [OR] ******

Components: Aluminum coated to ASTM A428 [0.40] [____] oz/sq ft ([120] [____] g/sq m).

Hardware: Galvanized to ASTM A153, [1.8] [2.0] [____] oz/sq ft ([550] [600] [____] g/sq m) coating.

PART	EXECUTION

INSTALLATION

Install rails [and posts] and accessories in accordance with manufacturer's instructions.

Set posts plumb, in concrete footings with top of footing [2 inches (50 mm) above] [6 inches ([150] mm) below] finish grade. Slope top of concrete for water run-off. Post Footing Depth Below Finish Grade: [____] feet ([____] m)].

****** [OR] ******

Drive posts plumb to correct elevations.

Attach rails securely to posts with anchoring hardware.

ERECTION TOLERANCES

Posts - Maximum Variation From Plumb: [1/2] [____] inch ([12] [____] mm).

Rail - Maximum Offset From True Position: [1] [____] inch ([25] [____] mm).

Rail - Maximum Variation From True Height: [1/2] [____] inch ([12] [____] mm).

Components shall not infringe adjacent property lines.

SCHEDULES

Access To Main Street: Box beam rail on steel posts, top of rail 18 inches above concrete median barrier.

Dividers at Parking Areas: W-Beam steel rail on wood posts, top of rail 24 inches above pavement surface.

END OF SECTION