ATTACHMENT_8_-_Specifications.doc

AG-4670-S-17-0190

ATTACHMENT 8

SPECIFICATIONS

FOR

BUCK CREEK AML SAFETY CLOSURE PROJECT

NATIONAL FORESTS IN NORTH CAROLINA

ENGINEERING, HERITAGE & RECREATION

FACILITIES SECTION

NANTAHALA NATIONAL FOREST

TUSQUITEE RANGER DISTRICT

CLAY COUNTY, NORTH CAROLINA

AUGUST 2017

NATIONAL FORESTS IN NORTH CAROLINA

TUSQUITEE RANGER DISTRICT OFFICE

123 WOODLAND DRIVE

MURPHY, NC 28906

SPECIFICATION INDEX

DIVISION 1 – GENERAL REQUIREMENTS

01110 - SUMMARY OF WORK

01300 - ADMINISTRATIVE REQUIREMENTS

01330 - SUBMITTALS

01450 - QUALITY CONTROL

01500 - TEMPORARY FACILITIES

DIVISION 2 – SITE WORK

02220 – SELECTIVE DEMOLITION

02230 – CLEARING & DISPOSAL

02315 – STRUCTURAL EXCAVATION FOR MINOR STRUCTURES

02370 – EROSION & SEDIMENT CONTROL

02820 – FENCES AND GATES

DIVISION 3 – CONCRETE

03100 – CONCRETE FORMWORK

03200 – CONCRETE REINFORCEMENT

03300 – CAST IN PLACE CONCRETE

DIVISION 5 – METALS

05530 – METAL GRATINGS

DIVISION 9 – FINISHES

09911 – PAINTING

SECTION 01110

SUMMARY OF WORK

A.

Work to be performed:

CATHOLIC FIELDS ADIT:

1. Stabilize 5’x 2’ opening

2. Remove deteriorating timbers at base of opening

3. Install grating; see sheet 3 on drawings

4. Install concrete footing.

CATHOLIC FIELDS ELEVATOR SHAFT:

1. Stabilize 5’x 5’ shaft collar to prevent collapse

2. Install cupola anchors directly to the rock surrounding shaft collar, if applicable

3. Excavate a trench around the shaft in loose material, if needed

a. Anchor the first tube in the trench

b. Bury the trench with rock or fill with concrete after the cupola is welded in place

4. Install cupola; see sheet 4 on drawings

DAVENPORT ADIT #1:

1. Stabilize 8’x 5’ opening.

2. Install grating; see sheet 3 on drawings

3. Install concrete footing.

B.

Work by Others

N/A D.

Work Sequence

1. The construction activities shall be confined to construction limits as defined by the COR

2. Contractor shall complete all work at one site before starting at another site when awarded multiple projects unless approved by CO

3. Sequence construction activities to minimize ground disturbance and impact on the recreating public

4. The work sequence will be clearly defined by the contractor’s progress schedule

END OF SECTION

SECTION 01300

ADMINISTRATIVE REQUIREMENTS

PART 1 - GENERAL

1.1

SECTION INCLUDES

A. Construction progress schedule.

B. Submittals for review, information, and project closeout.

C. Number of copies of submittals.

D. Submittal procedures.

1.2

PROJECT COORDINATION

A. During construction, coordinate use of site and facilities through the COR.

B. Coordinate field engineering and layout work under instructions of the COR.

C. Make the following types of submittals to the COR:

1. Requests for interpretation.

2. Requests for substitution.

3. Shop drawings, product data, and samples.

4. Test and inspection reports.

5. Manufacturer's instructions and field reports.

6. Applications for payment and change order requests.

7. Progress schedules.

8. Coordination drawings.

9. Closeout submittals.

PART 2 - PRODUCTS - NOT USED

PART 3 - EXECUTION

3.1

CONSTRUCTION PROGRESS SCHEDULE

A.

If preliminary schedule requires revision after review, submit revised schedule within 10 days.

B.

Within 20 days after review of preliminary schedule, submit draft of proposed complete schedule for review.

1.

Include written certification that major contractors have reviewed and accepted proposed schedule.

C.

Within 10 days after joint review, submit complete schedule.

D.

Submit updated schedule with each Application for Payment.

3.2

SUBMITTALS FOR REVIEW

A.

When the following are specified in individual sections, submit them for review:

1.

Product data.

2.

Shop drawings.

3.

Samples for selection.

4.

Samples for verification.

B.

Submit to COR for review for the limited purpose of checking for conformance with information given and the design concept expressed in the contract documents.

C.

Samples will be reviewed only for aesthetic, color, or finish selection.

D.

After review, provide copies and distribute in accordance with SUBMITTAL PROCEDURES article below.

3.3

SUBMITTALS FOR INFORMATION

A.

When the following are specified in individual sections, submit them for information:

1.

Design data.

2.

Certificates.

3.

Test reports.

4.

Inspection reports.

5.

Manufacturer's instructions.

6.

Manufacturer's field reports.

7.

Other types indicated.

3.4

SUBMITTALS FOR PROJECT CLOSEOUT

A.

When the following are specified in individual sections, submit them at project closeout:

1.

Project record documents.

2.

Operation and maintenance data.

3.

Warranties.

4.

Other types as indicated.

B.

Submit for U.S. Forest Service's benefit during and after project completion.

3.5

NUMBER OF COPIES OF SUBMITTALS

A.

Documents for Review:

1.

Small Size Sheets, Not Larger than 8-1/2 x 11 inches: Submit the number of copies which the Contractor requires, plus two copies which will be retained by the COR.

2.

Larger Sheets, Not Larger than 24 x 36 inches: Submit the number of opaque reproductions which Contractor requires, plus two copies which will be retained by COR.

B.

Documents for Information: Submit two copies.

3.6

SUBMITTAL PROCEDURES

A. Identify Project, Contractor, Subcontractor or supplier; pertinent drawing and detail number, and specification section number, as appropriate on each copy.

B. Apply Contractor's stamp, signed or initialed certifying that review, approval, verification of Products required, field dimensions, adjacent construction Work, and coordination of information is in accordance with the requirements of the Work and Contract Documents.

C. Deliver submittals to COR at business address.

D. Schedule submittals to expedite the Project, and coordinate submission of related items.

E. For each submittal for review, allow 15 days excluding delivery time to and from the COR.

F. Identify variations from Contract Documents and Product or system limitations which may be detrimental to successful performance of the completed Work.

G. Provide space for Contractor and COR review stamps.

H. When revised for resubmission, identify all changes made since previous submission.

I. Distribute copies of reviewed submittals as appropriate. Instruct parties to promptly report any inability to comply with requirements.

END OF SECTION

SECTION 01330

SUBMITTALS

PART 1 GENERAL

1.1 REQUIREMENTS INCLUDED

A. Procedures

B. Manufacturer’s Instructions

C. Manufacturer’s Certificates

1.2 PROCEDURES

A. Submittals shall be furnished before fabrication or installation occurs. All submittals shall be evaluated and either approved or rejected by the COR within 14 days after their receipt. A minimum of three (3) copies of submittals shall be supplied to the COR.

B. If the Contractor intends to provide or install an item that is an "or equal" or differs from that which is specified or shown on the drawings, he/she shall submit all product data, revised drawings or new drawings to the COR. for approval.

C. The contractor shall submit four sets of the manufacturer's description of all "or equals" proposed in lieu of name brands specified. This description shall include:

1. Product name and model number

2. Manufacturer

3. Product description

4. Technical data

1.3 MANUFACTURER’S INSTRUCTIONS

A. The Contractor shall provide three (3) copies of all of the manufacturers installation and maintenance instructions (written and/or drawings) to the COR.

1.4 MANUFACTURER’S CERTIFICATES

A. The Contractor shall provide all guarantees, certificates of performance, material of workmanship or warranties provided by the manufacturer or required by the specifications to the COR.

END OF SECTION

SECTION 01450

QUALITY CONTROL

PART 1 - GENERAL

1.1. WORK INCLUDED

A. The work shall consist of providing quality control in conformance with the Inspection of Construction provisions of this contract to ensure compliance with the drawings, specifications and provisions of the contract. The Contractor shall provide all personnel, equipment, tests, and reports to meet the requirements of this specification.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 QUALITY CONTROL SYSTEM

A. The Contractor shall provide and maintain a quality control system that will ensure that all services, supplies, and construction required under this contract conform to the contract requirements. The Contractor shall perform, or cause to be performed, the sampling, inspection, and testing required to substantiate that all supplies, services, and construction conform to the contract requirements.

3.2 QUALITY CONTROL PLAN

A. The Contractor shall submit in writing the following:

1. Authorities and responsibilities of inspection and testing personnel.

2. Experience and qualifications of inspection and testing personnel to be assigned and location of any (for hire) testing facility to be used.

B. The Contractors proposed quality control plan shall be submitted to the COR for review prior to the Contractor commencing work. The COR shall approve or disapprove the plan within 5 working days. Construction work shall not begin prior to the Contractor's receipt of written approval of the quality control plan.

C. The Contractor shall submit to the COR in writing any proposed changes to the approved plan. Proposed changes shall not be put into effect until approved in writing by the COR.

3.3 SAMPLING & TESTING

A. The Contractor shall provide and maintain appropriate measuring and testing devices, equipment, and supplies to accomplish the required measurement, testing and inspection in a timely manner. The Contractor shall take samples and perform inspections and tests necessary to achieve the quality of construction required by the contract. Sampling and testing frequency for specific items shall be as defined in the specifications.

3.4 RECORDS

A. The Contractor shall maintain current records of all inspections and tests performed.

B. The Contractor shall certify in writing that all inspections were performed in accordance with specifications. All testing and inspection records shall be submitted to the COR upon completion of the project

3.5 CERTIFICATIONS & MEASUREMENTS

A. Offsite Produced Materials. The Contractor shall furnish certificates executed by the manufacturer, supplier, or vendor, stipulating that all offsite produced materials incorporated into the work meet the applicable requirements as shown on the drawings or specifications.

B. Quantity Measurement. The Contractor shall make all measurements for computation of quantities for all work items except those specified for payment by Designed Quantity (DQ). The Contractor shall compute the quantities for periodic progress payments; the COR will compute the quantities for final payment based on measurements taken by the Contractor. All measurements are subject to verification. The Contractor shall submit all field notes, calculation sheets, and other data used to determine quantities. The Contractor shall certify in writing as to the accuracy of the measurements and computations submitted.

3.6 BASIS OF PAYMENT

Quality Control shall be considered incidental to the bid items and no additional payment will be made.

END OF SECTION

SECTION 01500

TEMPORARY FACILITIES

A.

General

This work includes temporary facilities, utilities and other related items necessary to complete the project indicated by the contract documents.

1. No facilities are provided by FS at site. Contractor shall provide portable sanitary facilities while project is in progress.

B.

Maintenance for Traffic

The Contractor shall safely maintain traffic control at the site as necessary to protect the public and the contractor’s workers.

C.

Erosion Control

See Section 02370 D.

Hazard Markers

The contractor shall provide, install, and maintain the necessary hazard markers, barricades, signs, or lights that will adequately delineate the construction area and keep traffic out of the construction area.

E.

Clean Up

1.

Remove all temporary work when the need for its use has ceased.

2.

Clean spaces that were occupied by temporary work and restore to conditions equal to or better than existed prior to construction.

END OF SECTION

SECTION 02230

CLEARING & DISPOSAL

PART 1 - GENERAL

A. Work included in this section covers the removal of vegetation only as necessary to complete project work.

PART 2 - PRODUCTS

None

PART 3 - EXECUTION

3.1 CLEARING

A. Contractor shall notify COR of anticipated need to remove tress in work areas.

B. Remove vegetation without causing damage to structures or facilities designated to remain. Repair any damage at Contractor’s expense.

C. All clearing logs, branches and debris shall be reduced to non-merchantable size and disposed of on site by scattering cleared material in area designated by COR.

3.2 GRUBBING

A. Grubbing is not required. All stumps will be left in-place.

3.3 BASIS OF PAYMENT

Clearing and Disposal is incidental to the work items where the work is occurring.

END OF SECTION

SECTION 02315

STRUCTURAL EXCAVATION FOR MINOR STRUCTURES

PART 1 - GENERAL

1.1 WORK INCLUDED

A. This work shall consist of excavation to construct retaining walls and slabs, disposal of excess excavation, drainage excavation, and excavation of unsuitable material if needed for the complete construction of the project.

B. Site grading shall consist of the excavation and disposal of the existing surfacing, bedding and sub-grade regardless of its nature to the depth necessary to accommodate new structures.

PART 2 - PRODUCTS

2.1 FILL MATERIAL

B. Imported NC DOT approved ABC stone.

PART 3 - EXECUTION

3.1 EXCAVATION

A. Excavate foundation pits to a width and length that allows room for work. Provide a firm foundation of uniform density throughout its length and width. Do not place concrete until the depth of excavation and the foundation material have been approved in writing by the Contracting Officer.

3.2 Utilization of Excavated Materials

A. All excavated material shall be disposed off government land. Excavated areas shall be backfilled with suitable material when necessary to complete the work.

3.3 BASIS OF PAYMENT

Incidental to applicable Bid Schedule Items.

END OF SECTION

SECTION 02370

EROSION AND SEDIMENTATION CONTROL

PART 1 – GENERAL

1.1 WORK INCLUDED

A. This work consists of temporary and permanent measures as shown on the drawings and as specified herein, to prevent and control soil erosion and sedimentation.

PART 2 – PRODUCTS

2.1 SILT FENCE

A. Silt fence shall be prefabricated with 1-1/2" square, hardwood posts, Mirafi Silt Fence, or approved equal.

B. Straw bales shall be approximately 36 inches in length, rectangular shape and weigh approximately 65 pounds.

PART 3 – EXECUTION

3.1 INSTALLATION

A. All erosion control devices shall be installed prior to commencing clearing & grubbing operations.

B. Install silt fence in accordance with manufacturer’s instructions. Caution shall be used when installing along streams and creeks. Install at locations as directed by the COR.

3.2 MONITORING

A. The Contractor shall monitor the performance of all erosion and sediment control practices and make minor adjustments as needed on a day-to-day basis. Silt fences shall be inspected after each rainfall and sediments deposits must be removed when they reach a maximum of 1/3 the height of the fence. Deteriorated or damaged fabrics must be replaced immediately.

B. Temporary controls shall be dismantled and disposed of after the disturbed soil has been re-vegetated.

3.3 BASIS OF PAYMENT

PAY ITEM

PAY UNIT

Temporary & Permanent

Erosion and Sedimentation Control ………………..…………...…..Lump Sum

END OF SECTION

SECTION 03100

CONCRETE FORMWORK

PART 1 – GENERAL

1.1 WORK INCLUDED

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

PART 2 - PRODUCTS

2.1 FORMS

A. Forms shall be wood, plywood, hardboard, or metal and shall be approved by the COR.

B. Form oil shall be non-staining type.

2.2 EXPANSION, CONSTRUCTION and CONTROL JOINTS

A. Expansion and Construction joints shall be pressure treated #2 Southern Yellow Pine.

PART 3 - EXECUTION

3.1 FORM CONSTRUCTION

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

B. Forms shall be constructed to produce the required concrete surface.

3.2 JOINTS

A. Expansion and construction joints shall be formed to the full depth of the joint. Install three (3) ½” dia. X 24” long smooth dowels at each joint.

B. Control joints shall be saw cut at 6 feet maximum intervals along the entire length of the concrete walkway. Joints shall be a minimum of 1 inch deep.

3.3 BASIS OF PAYMENT

NOT A PAY ITEM. Incidental to 03300 Cast-in-Place Concrete.

END OF SECTION

SECTION 03200

CONCRETE REINFORCEMENT

PART 1 – GENERAL

1.1 WORK INCLUDED

A. This section covers all concrete reinforcement and its accessories.

1.2 REFERENCES

ASTM A497

Welded Deformed Steel Wire Fabric for Concrete Reinforcement

ACI 318

Building Code Requirements for Structural Concrete

ACI SP-66

American Concrete Institute – Detailing Manual

PART 2 - PRODUCTS

2.1 REINFORCING

A. Reinforcing steel shall comply with ASTM A615, Grade 40, unless otherwise shown on the drawings.

B. Reinforcing mesh shall comply with ASTM A185 and shall be six inch opening, 10 gauge.

PART 3 – EXECUTION

3.1 PLACEMENT

A. Reinforcement bars & mesh shall conform to the sizes & spacing as shown on the drawings.

B. Field bending & cutting shall be permitted if performed in accordance with ACI Code.

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

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

E. Reinforcement shall be secured against displacement caused by construction loads or placing of concrete. All bar intersections shall be tied with annealed wire of not less than 16 gauge.

F. Depth of cover, radius of bends & deformations shall be in accordance with ACI 318.

3.3 BASIS OF PAYMENT

NOT A PAY ITEM. Incidental to 03300 Cast-in-Place Concrete.

END OF SECTION

SECTION 03300

CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 WORK INCLUDED

A. This work includes furnishing and placing all cast-in-place concrete.

1.2 REFERENCES

A. The latest editions of the following specifications and recommended practices shall govern:

ACI 301 - Specifications for Structural Concrete for Buildings

ACI 305 - Hot Weather Concreting

ACI 306 - Cold Weather Concreting

PART 2 - PRODUCTS

2.1 CONCRETE

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

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

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

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

E. 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 AASHTO T 152.

F. Slump shall not exceed 3 inches for vibrated concrete. The design of the concrete mixture shall be the responsibility of the Contractor.

PART 3 EXECUTION

3.1 PROTECTION

A. No concrete shall be discharged into live streams.

3.2 PREPARATION

A. The sub-grade and all formwork shall be inspected and approved by the COR prior to work beginning.

B. The Contractor shall give the COR a minimum of 24 hours written notice before placing concrete.

3.3 PLACING CONCRETE

A. "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. The batch ticket shall show the time the mix was batched.

B. 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 or with a temperature above 90 degrees F.

C. Concrete shall be placed in such a manner as to avoid segregation of the mixture. Concrete shall be spread in horizontal layers when practicable and shall not be freely dropped more than five (5) feet. Depositing a large quantity of concrete and flowing or working it along the forms will not be permitted.

D. Mechanical vibrators shall be used for consolidation of concrete. Concrete shall be consolidated within 15 minutes after placement. A minimum of two vibrators, in working order, shall be on the job during concrete placement. If consolidation of concrete with mechanical vibrators is impractical, hand tamping, rodding and spading shall be permitted.

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

3.4 FINISHING & CURING

A. Finishing

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

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

3. At all exposed form 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.

4. Final finish shall be heavy broom perpendicular to the trail.

B. Curing

1. Concrete shall be protected against rapid drying & cured in accordance with ACI 308 Guide to Curing Concrete.

3.5 WEATHER LIMITATIONS

A. Cold weather concreting shall meet the requirements of ACI 306R-99.

B. Hot weather concreting shall meet the requirements of ACI 305R-99.

3.6 SAMPLING & TESTING

A. Sampling and testing shall not be required.

3.7 BASIS OF PAYMENT

PAY ITEM

PAY UNIT

Cast in Place Concrete ……………………………...............................…....Square Feet

END OF SECTION

SECTION 05530

METAL GRATINGS

PART 1 – GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Metal bar gratings.

2. Metal frames and supports for gratings.

B. Related Sections include the following:

1. Division 5 Section "Structural Steel" for structural-steel framing system components.

2. Division 9 Section "Structural Metal Primer/Finish" for shop painting requirements.

1.2 SUBMITTALS

A. Product Data: For the following:

1. Clips and anchorage devices for gratings.

B. Shop Drawings: Show fabrication and installation details for gratings. Include plans, elevations, sections, and details of connections. Show anchorage and accessory items. Provide templates for anchors and bolts specified for installation under other Sections.

1.3 QUALITY ASSURANCE

A. Fabricator Qualifications: A firm experienced in producing gratings similar to those indicated for this Project and with a record of successful in-service performance, as well as sufficient production capacity to produce required units.

B. Metal Bar Grating Standards: Comply with applicable requirements of the following:

1. Non-Heavy-Duty Metal Bar Gratings: Comply with NAAMM MBG 531 "Metal Bar Grating Manual for Steel, Stainless Steel, and Aluminum Gratings and Stair Treads."

C. Welding: Qualify procedures and personnel according to the following:

1. AWS D1.1 "Structural Welding Code--Steel."

2. Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification.

1.4 PROJECT CONDITIONS

A. Field Measurements: Where gratings are indicated to fit to other construction, verify dimensions of other construction by field measurements before fabrication and indicate measurements on Shop Drawings. Coordinate fabrication schedule with construction progress to avoid delaying the Work.

1. Established Dimensions: Where field measurements cannot be made without delaying the Work, establish dimensions and proceed with fabricating gratings without field measurements. Coordinate construction to ensure that actual dimensions correspond to established dimensions. Allow for trimming and fitting.

1.5 COORDINATION

A. Coordinate installation of anchorages for gratings, grating frames, and supports. Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Acquired from one of the following or a source approved by COR:

1. Metal Bar Gratings

a. All American Grating, Inc.

b. Ohio Gratings, Inc.

2.2 FERROUS METALS

A. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.

B. Wire Rod for Grating Crossbars: ASTM A 510.

2.3 FASTENERS

A. General: Provide Type 304 or 316 stainless steel fasteners for exterior use and zinc-plated fasteners with coating complying with ASTM B 633, Class Fe/Zn 5, where built into exterior walls. Select fasteners for type, grade, and class required.

B. Bolts and Nuts: Regular hexagon-head bolts, ASTM A 307, Grade A; with hex nuts, ASTM A 563; and, where indicated, flat washers.

C. Plain Washers: Round, carbon steel, ASME B18.22.1.

D. Lock Washers: Helical, spring type, carbon steel, ASME B18.21.1.

E. Expansion Anchors: Anchor bolt and sleeve assembly of material indicated below with capability to sustain, without failure, a load equal to six times the load imposed when installed in unit masonry and equal to four times the load imposed when installed in concrete, as determined by testing per ASTM E 488, conducted by a qualified independent testing agency. 1. Material: Carbon steel components zinc-plated to comply with ASTM B 633, Class Fe/Zn 5.

2.4 FABRICATION

A. Shop Assembly: Fabricate grating sections in shop to greatest extent possible to minimize field splicing and assembly. Disassemble units only as necessary for shipping and handling limitations. Use connections that maintain structural value of joined pieces. Clearly mark units for reassembly and coordinated installation.

B. Form from materials of size, thickness, and shapes indicated, but not less than that needed to support indicated loads.

C. Shear and punch metals cleanly and accurately. Remove burrs.

D. Ease exposed edges to a radius of approximately 1/32 inch, unless otherwise indicated.

E. Fit exposed connections accurately together to form hairline joints.

F. Welding: Comply with AWS recommendations and the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

G. Provide for anchorage of type indicated; coordinate with supporting structure. Fabricate and space anchoring devices to secure gratings, frames, and supports rigidly in place and to support indicated loads.

1. Fabricate toe plates to fit grating units and weld to units in shop, unless otherwise indicated.

2. Toe plate Height: 4 inches, above walkway unless otherwise indicated.

H. Band edges of all openings in grating.

2.5 METAL BAR GRATINGS

A. Fabricate welded steel gratings as follows:

1. Grating Mark: As indicated.

B. Fabricate pressure-locked steel gratings as follows:

1. Grating Mark: As indicated.

C. Steel Finish: As follows:

1. Shop primer applied according to manufacturer's standard practice.

2. Hot-dip galvanized with a coating weight of not less than 1.8 oz. sq. ft. of coated surface.

D. Fabricate removable grating sections with banding bars attached by welding to entire perimeter of each section. Include anchors and fasteners of type indicated or, if not indicated, as recommended by manufacturer for attaching to supports.

1. Provide not less than four saddle clips for each grating section composed of rectangular bearing bars 3/16 inch or less in thickness and spaced 15/16 inch or more o.c., with each clip designed and fabricated to fit over two bearing bars.

2. Furnish threaded bolts with nuts and washers for securing grating to supports.

3. Furnish galvanized malleable-iron flange clamp with galvanized bolt for securing grating to supports. Furnish as a system designed to be installed from above grating by one person. a. Product: Provide "Grate-Fast" by Struct-Fast Inc., or approved substitute.

E. Fabricate cutouts in grating sections for penetrations indicated. Arrange cutouts to permit grating removal without disturbing items penetrating gratings.

1. Edge-band openings in grating that interrupt four or more bearing bars with bars of the same size and material as bearing bars.

F. Do not notch bearing bars at supports to maintain elevation.

2.6 GRATING FRAMES AND SUPPORTS

A. Steel Frames and Supports: Fabricate from structural-steel shapes, plates, and bars of welded construction to sizes, shapes, and profiles indicated and as necessary to receive gratings. Miter and weld connections for perimeter angle frames. Cut, drill, and tap units to receive hardware and similar items.

B. Equip units with integrally welded anchors for casting into concrete or building into masonry.

1. Unless otherwise indicated, space anchors 24 inches o.c. and provide minimum anchor units in the form of steel straps 1-1/4 inches wide by 1/4 inch thick by 8 inches long.

C. Galvanize all components.

2.7 FINISHES

A. Finish gratings, frames, and supports after assembly.

B. Primer/finish coating is specified in Division 9 Section "Structural Metal Primer/Finish."

C. Galvanizing: For those items indicated for galvanizing, apply zinc coating by the hot-dip process complying with ASTM A 123.

PART 3 – EXECUTION

3.1 INSTALLATION, GENERAL

A. Fastening to In-Place Construction: Provide anchorage devices and fasteners where necessary for securing gratings to in-place construction. Include threaded fasteners for concrete and masonry inserts, through-bolts, lag bolts, and other connectors.

B. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing gratings. Set units accurately in location, alignment, and elevation; measured from established lines and levels and free from rack.

C. Provide temporary bracing or anchors in formwork for items that are to be built into concrete or masonry.

D. Fit exposed connections accurately together to form hairline joints. Weld connections that are not to be left as exposed joints but cannot be shop welded because of shipping size limitations. Do not weld, cut, or abrade the surfaces of exterior units that have been hot-dip galvanized after fabrication and are for bolted or screwed field connections.

E. Field Welding: Comply with the following requirements:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap.

3. Remove welding flux immediately.

3.2 INSTALLING METAL BAR GRATINGS

A. Install gratings to comply with recommendations of referenced metal bar grating standards that apply to grating types and bar sizes indicated, including installation clearances and standard anchoring details.

B. Attach removable units to supporting members with type and size of clips and fasteners indicated or, if not indicated, as recommended by grating manufacturer for type of installation conditions indicated.

C. Attach non-removable units to supporting members by welding where both materials are the same; otherwise, fasten by bolting as indicated above.

3.3 ADJUSTING AND CLEANING

A. When ambient temperature is 32°F and rising, unless otherwise required by the coating manufacturer, and immediately after erection, clean field welds, bolted connections, and abraded areas of shop coat, per SSPC SP-2 Specification (Hand Tool Cleaning). Apply touchup coating to exposed areas using same material and color as used for shop coating. Apply coating by brush to provide a minimum dry film thickness of 3 mils.

B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair galvanizing to comply with ASTM A 780.

C. Wash and clean steel prior to erection and/or after erection to COR’s satisfaction.

END OF SECTION

SECTION 09911

PAINTING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes surface preparation and field painting of metal grating.

1.2

SUBMITTALS

A.

Product Data: For each product indicated.

B.

Samples: One 24 inch (610 mm) square sample for each type of finish-coat material indicated.

C.

MSDS Sheets: For each paint and primer product specified.

1.3

PROJECT CONDITIONS

A.

Store materials not in use in tightly covered containers in a well-ventilated area at a minimum ambient temperature of 45 deg F (7 deg C). Maintain storage containers in a clean condition, free of foreign materials and residue.

B.

Apply waterborne paints only when temperatures of surfaces to be painted and surrounding air are between 50 and 90 deg F (10 and 32 deg C).

C.

Apply solvent-thinned paints only when temperatures of surfaces to be painted and surrounding air are between 45 and 95 deg F (7 and 35 deg C).

D.

Do not apply paint in snow, rain, fog, or mist; or when relative humidity exceeds 85 percent; or at temperatures less than 5 deg F (3 deg C) above the dew point; or to damp or wet surfaces.

1.4

EXTRA MATERIALS

A.

Furnish extra paint materials from the same production run as the materials applied and in the quantities described below. Package with protective covering for storage and identify with labels describing contents. Deliver extra materials to US Forest Service.

1.

Quantity: 5 percent, but not less than 1 gal. (3.8 L) or 1 case, as appropriate, of each material and color applied.

PART 2 - PRODUCTS

2.1

PAINT MATERIALS, GENERAL

A.

Material Compatibility: Provide primers and finish-coat materials that are compatible with one another and with the substrates indicated under conditions of service and application, as demonstrated by manufacturer based on testing and field experience.

B.

Material Quality: Provide manufacturer's best-quality paint material of the various coating types specified that are factory formulated and recommended by manufacturer for application indicated. Paint-material containers not displaying manufacturer's product identification will not be acceptable.

PART 3 - EXECUTION

3.1 APPLICATION

A.

Examine substrates, areas, and conditions, with Applicator present, for compliance with requirements for paint application.

B.

Coordination of Work: Review other Sections in which primers are provided to ensure compatibility of the total system for various substrates. On request, furnish information on characteristics of finish materials to ensure use of compatible primers.

C.

Remove hardware and hardware accessories, plates, machined surfaces, lighting fixtures, and similar items already installed that are not to be painted. If removal is impractical or impossible because of size or weight of the item, provide surface-applied protection before surface preparation and painting.

1.

After completing painting operations in each space or area, reinstall items removed using workers skilled in the trades involved.

D.

Surface Preparation: Clean and prepare surfaces to be painted according to manufacturer's written instructions for each particular substrate condition and as specified.

1.

Provide barrier coats over incompatible primers or remove and re-prime.

2.

Ferrous Metals: Clean ungalvanized ferrous-metal surfaces that have not been shop coated; remove oil, grease, dirt, loose mill scale, and other foreign substances. Use solvent or mechanical cleaning methods that comply with SSPC's recommendations.

a.

Blast steel surfaces clean as recommended by paint system manufacturer and according to SSPC-SP 6/NACE No. 3.

b.

Treat bare and sandblasted or pickled clean metal with a metal treatment wash coat before priming.

c.

Touch up bare areas and shop-applied prime coats that have been damaged. Wire-brush, clean with solvents recommended by paint manufacturer, and touch up with same primer as the shop coat.

3.

Galvanized Surfaces: Clean galvanized surfaces with non-petroleum-based solvents so surface is free of oil and surface contaminants. Remove pretreatment from galvanized sheet metal fabricated from coil stock by mechanical methods.

E.

Material Preparation:

1.

Maintain containers used in mixing and applying paint in a clean condition, free of foreign materials and residue.

2.

Stir material before application to produce a mixture of uniform density. Stir as required during application. Do not stir surface film into material. If necessary, remove surface film and strain material before using.

F.

Exposed Surfaces: Include areas visible when permanent or built-in fixtures, grilles, convector covers, covers for finned-tube radiation, and similar components are in place. Extend coatings in these areas, as required, to maintain system integrity and provide desired protection.

1.

Paint surfaces behind movable equipment and furniture the same as similar exposed surfaces. Before final installation of equipment, paint surfaces behind permanently fixed equipment or furniture with prime coat only.

2.

Paint interior surfaces of ducts with a flat, non-specular black paint where visible through registers or grilles.

3.

Paint back sides of access panels and removable or hinged covers to match exposed surfaces.

4.

Finish exterior doors on tops, bottoms, and side edges the same as exterior faces.

5.

Finish interior of wall and base cabinets and similar field-finished casework to match exterior.

G.

Sand lightly between each succeeding enamel or varnish coat.

H.

Scheduling Painting: Apply first coat to surfaces that have been cleaned, pretreated, or otherwise prepared for painting as soon as practicable after preparation and before subsequent surface deterioration.

1.

Omit primer over metal surfaces that have been shop primed and touchup painted.

2.

If undercoats, stains, or other conditions show through final coat of paint, apply additional coats until paint film is of uniform finish, color, and appearance.

I.

Application Procedures: Apply paints and coatings by brush, roller, spray, or other applicators according to manufacturer's written instructions.

J.

Minimum Coating Thickness: Apply paint materials no thinner than manufacturer's recommended spreading rate. Provide total dry film thickness of the entire system as recommended by manufacturer

K.

Mechanical and Electrical Work: Painting of mechanical and electrical work is limited to items exposed in equipment rooms and occupied spaces.

L.

Block Fillers: Apply block fillers to concrete masonry block at a rate to ensure complete coverage with pores filled.

M.

Prime Coats: Before applying finish coats, apply a prime coat, as recommended by manufacturer, to material that is required to be painted or finished and that has not been prime coated by others. Recoat primed and sealed surfaces where evidence of suction spots or unsealed areas in first coat appears, to ensure a finish coat with no burn-through or other defects due to insufficient sealing.

N.

Pigmented (Opaque) Finishes: Completely cover surfaces as necessary to provide a smooth, opaque surface of uniform finish, color, appearance, and coverage. Cloudiness, spotting, holidays, laps, brush marks, runs, sags, ropiness, or other surface imperfections will not be acceptable.

O.

Transparent (Clear) Finishes: Use multiple coats to produce a glass-smooth surface film of even luster. Provide a finish free of laps, runs, cloudiness, color irregularity, brush marks, orange peel, nail holes, or other surface imperfections.

3.2

CLEANING AND PROTECTING

A.

At the end of each workday, remove empty cans, rags, rubbish, and other discarded paint materials from Project site.

B.

Protect work of other trades, whether being painted or not, against damage from painting. Correct damage by cleaning, repairing or replacing, and repainting, as approved by COR.

C.

Provide "Wet Paint" signs to protect newly painted finishes. After completing painting operations, remove temporary protective wrappings provided by others to protect their work.

1.

After work of other trades is complete, touch up and restore damaged or defaced painted surfaces. Comply with procedures specified in PDCA P1.

3.3

EXTERIOR FINISH SCHEDULE

A.

Trim:

1.

Acrylic-Enamel Finish: Two finish coats over a primer.

a.

Primer: Exterior wood primer for acrylic enamels.

b.

Two Finish Coats: Exterior semigloss acrylic enamel.

END OF SECTION