Atch 2.rtf

Attachment 2

USDA FOREST SERVICE

NICHOLSON CREEK HORSE BRIDGE

AND TRAIL

JULY 2010

US Forest Service 4931 Broad River Road Columbia, SC 29212

NICHOLSON CREEK HORSE BRIDGE

DIVISION 1 - GENERAL REQUIREMENTS

01010 - SUMMARY OF WORK

In accordance with the contract provisions, the contractor is to provide the complete construction of the Burrells Ford Campground Improvements in accordance with the drawings, specifications, and other provisions of the contract. Work shall include but not be limited to the following:

Demolition. 2. Clearing and grubbing

3. Installation of new fiberglass horse bridge 4. Concrete trail

5. New walkway to existing weirs

01051 – CONSTRUCTION STAKING

Construction staking shall be the responsibility of the Contractor. Staking for any part of the work shall be approved by the COR prior to commencing construction on that part. Construction staking shall not be a separate pay item, but shall be considered part of each individual item of work.

- SUBMITTALS

Contractor shall submit to the COR, data sheets and/or drawings for all "or equal" substitutions proposed in lieu of the name brands specified prior to commencing any work that relates to a respective submittal. Contractor shall submit 3 copies of all submittals.

Contractor shall submit 3 copies of all submittals as specified in other sections of these specifications.

01510 - TEMPORARY UTILITIES

Electricity - Electrical power is not available at the site.

Water -Potable water (drinking water) is not available at the site. Sanitary - Sanitary facilities are not available at the site.

01635 - PROTECTION OF ADJACENT AREAS

The Contractor shall be responsible for protecting from damage all adjacent areas and existing improvements around or near the project site. All damage to areas caused by construction activities or equipment shall be immediately reported to the COR. The Contractor shall be responsible for repairing all damaged areas as directed by the COR.

DIVISION 2 - SITE WORK

SECTION 02050 - DEMOLITION

PART 1 - GENERAL

This item covers the removal and disposal of the following:

Existing wooden bridge, angle supports, hardware

PART 2 - PRODUCTS

None.

PART 3 - EXECUTION

All material designated to be removed shall be removed from the project site and disposed of in accordance with all state regulations.

All holes shall be backfilled and compacted to the density of adjacent ground.

SECTION 02110 - CLEARING

PART 1 – GENERAL

PART 2 – PRODUCTS

None

PART 3 – EXECUTION

Cut all trees within the areas of construction or as directed by the COR.

Grub deep enough to remove stumps, roots, buried logs, moss, turf, or other vegetative debris.

Backfill stump holes and other grubbing holes with backfill material to the level of the surrounding ground. Compact backfill with heavy equipment until there is no visible displacement.

Disposed of trees, logs, limbs, tops and slash as shown on the drawings or specified in these specifications.

Heavy brushing debris shall be removed from site or chipped and scattered beyond tree line.

02210 - SITE GRADING

PART 1 ‑ GENERAL

A. This section covers all borrow material compaction and geoblock panels

PART 2 ‑ PRODUCTS

Fill Material Borrow material required shall be obtained by the Contractor and shall consist of a sandy – clay mixture as approved by the COR.

The material shall be free from organic vegetative matter.

The maximum size of any particle shall not be greater than 1” in diameter.

Oversize material may either be removed or broken down to the specified dimension.

The removal or the breakdown of oversize material to the specified size shall be done at the material source.

PART 3 ‑ EXECUTION

The contractor shall supply all fill material.

SECTION 02250 – COMPACTION CONTROL AND TESTING

PART 1 - GENERAL

This section covers all compaction for earth fills, approaches at horse bridge as shown on the drawings and specified herein.

PART 2 - PRODUCTS

None

PART 3 - EXECUTION

The ground on which the fill or backfill material is to be placed shall be firm, dry, unfrozen, and cleared of all debris.

Earth backfill shall be done in 8" lifts (max.) and compacted with mechanical tamper or roller until no visible movement is observed.

DIVISION 3 - CONCRETE

SECTION 03100 - CONCRETE FORMWORK

PART 1 - GENERAL

This section covers all formwork, expansion and control joints, and related accessories.

PART 2 - PRODUCTS

Forms shall be wood, plywood, hardboard and shall be approved by COR.

Form oil shall be nonstaining type.

Expansion joint filler shall be premolded or preshaped type made of asphalt fiber.

PART 3 - EXECUTION

Forms shall be built tight, in proper alignment, and adequate to resist the stresses of concrete placement without deformation.

Forms shall be constructed to produce the required concrete surface.

Expansion and contraction joints shall be formed as indicated on the drawings.

SECTION 03200 - CONCRETE REINFORCEMENT

PART 1 - GENERAL

This section covers all concrete reinforcement and its accessories.

The latest editions of the following specifications and codes shall govern:

ACI 301, Specifications for Structural Concrete for Buildings

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

ASTM A185, Steel Welded Wire, Fabric, Plain, for Concrete Reinforcement

PART 2 - PRODUCTS

Reinforcing steel shall comply with ASTM A615, intermediate grade 40, unless otherwise shown.

Reinforcing mesh shall comply with ASTM A185 and shall be gauge and mesh indicated.

Plastic fibers mixed with the concrete may be used in place of the reinforcing mesh.

PART 3 - EXECUTION

Reinforcement bars and mesh shall conform to the sizes and spacings as shown.

Field bending and cutting will be permitted if performed in accordance with above listed code.

Reinforcement shall be free from dirt, oil, paint, grease, mill scale, and loose or thick rust when concrete is placed.

Woven wire mesh shall be hooked and/or supported during the placement of concrete slabs to insure proper embedment as detailed.

Anchorage and accessories shall be accurately placed as shown and held rigidly in position during placing of concrete.

Depth of cover, radius of bends, and deformations shall be in accordance with ACI-318.

All splices shall overlap a minimum of 18 inches.

SECTION 03300 - CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

This section covers cast-in-place concrete, including curing and finishing of concrete.

The latest editions of the following specifications and recommended practiced shall govern:

ACI 301 - Specifications for Structural Concrete for Buildings

PART 2 - PRODUCTS

Aggregate shall conform to the requirements of AASHTO M6 and M80 and shall be well graded from fine to coarse within designated limits.

Cement, Portland, shall comply with ASTM C150, Type 1. Supplier shall provide mill certification of compliance with specification.

Water shall be clean, fresh, and free from injurious amounts of minerals or foreign substances.

Additives, air entrainment agents shall comply with ASTM C-260.

Liquid curing membrane shall be Type 1-D or Type 2.

Concrete Mix Design

All concrete shall have a minimum "compressive strength" of 3000 psi at 28 days.

Concrete shall be air entrained and shall contain not less than 3% and not more than 6% entrained air determined by test procedure ASTM C-138.

The design of the concrete mixture shall be the responsibility of the Contractor and shall be submitted to the COR for approval prior to placing any concrete.

PART 3 - EXECUTION

"Ready-Mixed Concrete" may be employed if the time interval between mixing at the plant and discharge into the form does not exceed 1-1/2 hours.

All concrete shall be placed within 1-1/2 hours from the time of mixing.

No concrete shall be placed after it has started its initial set.

No concrete with a temperature above 90oF or below 50o shall be placed.

Concrete shall be placed in such a manner as to avoid segregation of the mixture.

Concrete shall be spread in horizontal layers when practicable.

No concrete shall be freely dropped more than 5'.

Depositing a large quantity of concrete and flowing or working it along the forms will not be permitted.

Mechanical vibrators shall be used for consolidation of concrete.

Concrete shall be consolidated within 15 minutes after placement.

If consolidation of concrete with mechanical vibrators is impractical, hand tamping, rodding, and spading will be permitted.

Concrete shall be placed and protected as specified for temperature conditions.

Concrete plant standards and truck mixer and agitator standards shall be as recommended by the National Ready Mix Association.

Finishing

All finishes shall be made without use of cement or other dusting materials.

Concrete shall be struck to proper grade and surface finished with float trowels.

At all exposed formed surfaces, remove all ties, fill all form tie holes and imperfections; i.e., "honeycombing", with dry cement mortar, remove all lines, and then "sack" or finish to match adjacent surfaces.

All concrete pads shall be broom finished.

All edges and control joints, shall be edged with a minimum 1/2 inch radius edgingtool.Concrete shall be protected against rapid drying and kept moist for 7 days by covering with curing paper with edges sealed, burlap, canvas, Type 1-D or Type 2 liquid membrane curing compounds, or by sprinkling.

Testing

Concrete shall have a minimum 28-day breaking strength of 3000 psi when tested in accordance with ASTM C-39.

At the option of the COR, the Contractor shall make a minimum of two (2) test cylinders from each concrete truck. The test cylinders shall be made in accordance with ASTM C31, stored on the site and protected from damage. Each cylinder shall be labelled to identify which section of the project the concrete was incorporated. The Contractor shall deliver the cylinders to a Forest Service approved laboratory for testing. The cost of testing (breaking) the cylinders will be paid for by the Contractor.

Slump shall not exceed 3" for vibrated concrete or 5" for nonvibrated concrete. Contractor shall perform slump testing in accordance with ASTM C143 as may be directed by the COR.

DIVISION 13 – SPECIAL CONSTRUCTION

SECTION 13120 – PRE-ENGINEERED STRUCTURES

PART 1 – GENERAL

This section covers the complete design, construction and installation of Fiber Reinforced Polymer (FRP) horse trail bridge. The contracor shall provide a fully engineered 6ft wide x 60 ft long (sloped ends) bridge of Fiber Reinforced Polymer composite construction with the support documentation of the bridge drawings and structural calculations that are signed and sealed by the designing licensed Professional Engineer. These documents shall be reviewed and approved by the COR prior to beginning the bridge fabrication.

One source regarded as the minimum standards for design and construction of the FRP bridge is E.T. Techtonics, Inc., P.O. Box 40060, Philadelphia, PA. 19106. Phone: 215.592.7620 or an approved equal.

Work includes all other incidental work necessary to complete the bridge installation.

PART 2-PRODUCTS

All lumber shall be No.2 or better, Southern Yellow Pine and pressure treated per AWPA standards. All lumber shall be sawn and fabricated prior to pressure treatment with preservative. All lumber shall be produced in accordance with Best Management Practices for the Use of Treated Wood in Aquatic Environments, 1996, by Western Wood Preservers Institute, and Canadian Institute of Treated Wood. Deck lumber shall be 3” in thickness, minimum.

All hardware used in the construction of the abutments shall be hot dip galvanized in accordance with AASHTO M-232. The FRP bridge bolted connection hardware shall be A307 hot-dipped galvanized steel or better.

FRP bridges shall be fabricated for high-strength E-glass and isophthalic polyester with fire retardant additive.

The FRP bridge plates are fabricated and purchased from the manufacturer of the FRP bridge. The FRP plates are supported by the specified bridge support sills and anchored by the duckbill soil anchors, to which the bridge stringers are attached setting on the plate AS SHOWN ON THE DRAWINGS.

The minimum thickness of FRP Composite shapes shall be as follows:

Square tube members (closed type shape) shall be 0.25 inch

Wide-flanged beams, channel sections and angles (open type shapes) shall be a minimum thickness of 0.25 inch Standard bridge end and plate shall be a minimum thickness of 0.25 inch

Weathering and ultraviolet light protection shall be provided by addition of veil to the laminate construction. Minimum material strength properties are as follows:

Tension 33,000 psi

PART 3 – EXECUTION

Scope of Work

Work performed is excavation and embankment in accordance with the specifications.

All topsoil shall be removed to clean mineral soil under footings prior to placement.

All construction and installation shall be performed in conformance with the manufacturer’s recommendations and the approved shop drawings.

Performance

Provide 14 days notice prior to delivery and/or installation of the new bridge.

If the prefabricated superstructure is not installed immediately upon delivery to the project site, provide appropriate equipment and labor to unload and stack, support, and store all material at the delivery point designated buy the COR. Support and stack all components to prevent damage. Furnish and install blocking such that all components are supported at least 6” above the ground.

SECTION 13130 – BRIDGE SUPPORT SILLS

PART 1 – GENERAL

This section covers the furnishing and installing of the concrete or plastic bumpers and all accessories and components. The plastic or concrete bumpers are the foundation for the bridge ends.

The sills shall be anchored into the compacted stone into native ground, as shown on drawings, with Manta Ray MR88 eart anchors. The FRP bridge plate attaches to the top of the sills and the FRP bridge stringers sets on the FRP plate. The bridge stringers shall be attached down on the FRP plate by 4x4x1/4” galvanized metal bridge clips connected to the MR88 earth anchors as shown on the drawings.

PART 2 – PRODUCTS

Manta Ray MR88 earth anchors

Bridge support sill shall be 6”x 8” x 8’ Impact Curbs by Black Rhino recycling, Inc. or an equal such as reinforced concrete beam produced locally of similar size. Contact Keith Brody of Black Rhino, Inc. West Mifflin, PA. Phone: (800)974.4669, Fax (412)460.0166.

PART 3 – EXECUTION

Install specified plastic or concrete bridge support sills for the FRP bridge plate and bridge structure end suppports in contact with the stone as shown on the drawings.