SECTION 02853

PARKING BUMPERS

PART	GENERAL

SECTION INCLUDES

[Precast concrete] [Timber] parking bumpers and anchorage.

RELATED SECTIONS

Section 02510 - Asphaltic Concrete Paving.

Section 02520 - Portland Cement Concrete Paving.

Section [______-____________]: [________] Paving.

Section [______-____________]: Interior concrete finishing.

UNIT PRICE - MEASUREMENT AND PAYMENT

Parking Bumpers:

Basis of Measurement: By the unit.

Basis of Payment: Includes bumper unit, installed.

REFERENCES

ANSI/ASTM C150 - Portland Cement.

ANSI/ASTM C260 - Air-Entraining Admixtures for Concrete.

ANSI/ASTM C330 - Lightweight Aggregates for Structural Concrete.

ASTM A615 - Deformed and Plain Billet Steel Bars for Concrete Reinforcement.

ASTM C33 - Concrete Aggregates.

SUBMITTALS

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

Product Data: Provide unit configuration, dimensions.

Samples: Submit [two] [_______] concrete bumper units, illustrating surface finish.

COORDINATION

Coordinate work under provisions of Section [01039.] [________.]

Coordinate the work with pavement placement.

PART	PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

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

CONCRETE BUMPERS

Concrete and Reinforcement Materials: Specified in Section [03200] and [03300.] [________.]

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

Cement: ANSI/ASTM C150, Portland Type [I - Normal] [III - High Early Strength] [II - Sulfate Resisting]; [white] [gray] [buff] color.

Concrete Materials: [ASTM C33] [ANSI/ASTM C330]; water and sand.

Reinforcing Steel: ASTM A615, deformed steel bars; [unfinished] [galvanized] [epoxy] finish, strength and size commensurate with precast unit design.

Air Entrainment Admixture: ANSI/ASTM C260.

Concrete Mix: Minimum [5000] [____] psi ([34] [____] MPa), 28 day strength, air entrained to [5 to 7] [________] percent.

Use rigid molds, constructed to maintain precast units uniform in shape, size and finish. Maintain consistent quality during manufacture.

Embed reinforcing steel, and drill or sleeve for [two] [________] dowels.

Cure units to develop concrete quality, and to minimize appearance blemishes such as non-uniformity, staining, or surface cracking.

[Minor patching in plant is acceptable, providing appearance of units is not impaired.]

Sand blast exposed-to-view precast unit surfaces to [[____] percent of unit aggregate surface] [[light] [medium] [heavy] exposure].

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

TIMBER BUMPERS

Timber Parking Bumpers: [Preservative pressure treated] [________], [________] species timber, pre-drilled for [two] [________] dowels.

CONFIGURATION

Nominal Size: [____] inches ([____] mm) high, [____] inches ([____] mm) wide, [____] feet ([____] m) long.

Profile: [Manufacturer's standard.] [Rectangular cross section with sloped vertical faces, square ends.] [________.]

ACCESSORIES

Dowels: Steel, [unfinished] [galvanized finish]; [1/2] [____] inch ([12] [____] mm) diameter, [____] inch ([____] mm) long, pointed tip.

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

Dowels: Cut reinforcing steel, [1/2] [____] inch ([12] [____] mm) diameter, [____] inch ([____] mm) long, pointed tip.

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

Adhesive: [Epoxy type.] [________.]

PART	EXECUTION

INSTALLATION

Install units without damage to shape or finish. Replace or repair damaged units.

Install units in alignment with adjacent work.

Fasten units in place with [[2] [____] dowels per unit bumper] [[full bed of] [spot] adhesive].

SCHEDULES

Interior Parking Garage: White cement color, 20 percent exposure of aggregate, adhesive bonded.

Rear Parking Area and Driveway: Grey cement, smooth surface finish, dowelled.

END OF SECTION