W912PL-17-B-0003_Amendment0003.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICAITON NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicble)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICIATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended, is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a)By completing items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment your desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPIRATION DATA (If required)

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER

NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc. ) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION ( Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

NSN 7540-01-152-8070

Previous edition unusable

0003 Jun 1, 2017

W912PL

CONTRACTING DIVISION

915 Wilshire Blvd, Suite 930

LOS ANGELES, CA 90017

SEE ITEM 6

W912PL-17-B-0003

May 8, 2017

FY17 – NMCA Gravesite Expansion and Cemetery Improvements, Phoenix, Arizona

1. Please see attached Amendment 0003 summary sheet for all revisions.

Sandra Oquita

CONTRACTING OFFICER

INSTRUCTIONS

Instructions for items other than those that are self-explanatory, are as follows:

Item 1 (Contract ID Code) . Insert the contract type identification code that appears in the title block of the contract being modified.

Item 3 (Effective date) .

(1)

(2)

(3)

(4)

(5)

For a solicitation amendment, change order, or administrative change, the effective date shall be the issue date of the amendment, change order, or administrative change.

For a supplemental agreement, the effective date shall be the date agreed to by the contracting parties.

For a modification issued as an initial or confirming notice of termination for the convenience of the Government, the effective date and the modification number of the confirming notice shall be the same as the effective date and modification number of the initial notice.

For a modification converting a termination for default to a termination for the convenience of the Government, the effective date shall be the same as the effective date of the termination for default.

For a modification confirming the contacting officer's determination of the amount due in settlement of a contract termination, the effective date shall be the same as the effective date of the initial decision.

(a)

(b)

(c)

(d)

(e)

(f)

Item 6 (Issued By) . Insert the name and address of the issuing office. If applicable, insert the appropriate issuing office code in the code block.

Item 8 (Name and Address of Contractor) . For modifications to a contract or order, enter the contractor's name, address, and code as shown in the original contract or order, unless changed by this or a previous modification.

Item 9, (Amendment of Solicitation No. - Dated), and 10, (Modification of Contract/Order No. - Dated ). Check the appropriate box and in the corresponding blanks insert the number and date of the original solicitation, contract, or order.

Item 12 (Accounting and Appropriation Data) .

When appropriate, indicate the impact of the modification on each affected accounting classification by inserting one of the following entries.

(2) Accounting classification Net decrease $

Include subject matter or short title of solicitation/contract where feasible.

Item 16B . The contracting officer's signature is not required on solicitation amendments. The contracting offier's signature is normally affixed last on supplemental agreements.

(i)

NOTE: If there are changes to multiple accounting classifications that cannot be placed in block 12, insert an asterisk and the words "See continuation sheet".

Item 13 . Check the appropriate box to indicate the type of modification. Insert in the corresponding blank the authority under which the modification is issued. Check whether or not contractor must sign this document. (See FAR 43.103.)

Item 14 (Description of Amendment/Modification) .

Organize amendments or modifications under the appropriate Uniform Contract Format (UCF) section headings from the applicable solicitation or contract. The UCF table of contents, however, shall not be set forth in this document Indicate the impact of the modification on the overall total contract price by inserting one of the following entries:

Total contract price increased by $

Total contract price decreased by $

Total contract price unchanged.

State reason for modification.

When removing, reinstating, or adding funds, identify the contract items and accounting classifications.

When the SF 30 is used to reflect a determination by the contracting officer of the amount due in settlement of a contract terminated for the convenience of the Government, the entry in Item 14 of the modification may be limited to --

A reference to the letter determination; and

A statement of the net amount determined to be due in settlement of the contract.

(g)

(h)

(i)

(ii)

(1)

(2)

(3)

(4)

(5)

(6)

(i)

(ii)

(iii)

STANDARD FORM 30 (REV. 10-83) BACK

(1) Accounting classification Net increase $

NMCA GRAVESITE EXPANSION AND W912PL-17-B-0003

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SF 30 CONTINUATION PAGE 1 OF 1

SF 30 BLOCK 14 CONTINUATION

SUMMARY OF CHANGES

DIVISION 01 – 48 - TECHNICAL SPECIFICATIONS

Section Number Section Title

03 48 24 PRECAST CONCRETE COLUMBARIUM UNITS

26 05 41 UNDERGROUND ELECTRICAL CONSTRUCTION

SECTION 03 48 24

PRECAST CONCRETE COLUMBARIUM UNITS

PART 1 - GENERAL

1.1 SUMMARY

A. This section covers the manufacture and installation of precast concrete columbarium units, as shown on the drawings and specified herein, including but not limited to: the steel reinforcement, steel embedment plates, required sleeves, finished exposed surfaces, preparation of setting surface, adhesive, columbarium fasteners, and niche cover anchor clip assemblies.

B. Acceptable designs of the columbarium units' components are provided as shown on the Drawings. The Contractor may use this design for this Work or may propose alternate designs of the corresponding components as follows:

1. Design for alternate columbarium units shall comply with the design criteria as per Articles 1.3.F and shall comply with the functional tests as per Article 1.3.G of this Specification.

2. Unless indicated otherwise, all provisions of this Specification shall apply to the Contractor proposed design.

C. The Government may accept or reject part or all of any design proposed by the Contractor.

D. This section covers acceptance and installation of the Government-provided niche covers, one for each niche of the new columbarium units.

1.2 RELATED DOCUMENTS

A. Section 31 20 11, EARTH MOVING (SHORT FORM).

B. Section 03 30 53, CAST-IN-PLACE CONCRETE (SHORT FORM) for Cast-in-place concrete work.

C. Section 04 20 00, UNIT MASONRY for stone or brick work.

D. Section 04 43 00, NATURAL STONE VENEER, stone veneer.

E. Section 07 92 00, JOINT SEALANTS, Materials and Workmanship for sealant application.

F. Section 04 73 01, COLUMBARIUM NICHE COVERS-MARBLE, for niche covers.

G. Section 07 92 00, JOINT SEALANTS, Materials and Workmanship for sealant application.

H. Section 01 33 00, SUBMITTAL PROCEDURES.

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05/30/2017

AMENDMENT 0003

1.3 QUALITY ASSURANCE

A. Manufacturer’s and Installer’s Qualifications: Prior to commencement of work, Contractor shall submit documentation regarding the experience of his precast concrete supplier and his precast concrete installer in the design, manufacture and installation of Precast Concrete structures and custom units.

B. Precast concrete manufacturer’s qualified Registered Professional

Structural Engineer to certify that precast reinforced concrete conforms to specified requirements.

C. Codes and regulations of the Federal, State and County authorities shall apply.

D. Fabricate to dimensions shown or approved. Replace or correct Columbarium

Units that do not comply with the individual dimensions and tolerances.

E. Before starting production of Precast Concrete Columbarium Units, furnish at the site, two complete Precast Concrete Columbarium Units, to demonstrate quality of construction. Commence production of columbarium units only after written approval has been obtained from the Resident

Engineer/COR.

F. Design Criteria:

1. The Columbarium Units shall be of the following type, style, and size:

a. Type: Precast concrete, reinforced.

b. Size: Interior and exterior dimensions as indicated on plans.

2. Columbarium top shall be capable of structurally supporting imposed service live load of no less than 240 Kgs./Square Meter (50 lb./ ft²), and dead loads based on cap (coping) thickness and heights, including material composition and element section properties, mortar and grout, and dead loads based on concrete top element sectional properties.

3. The Contractor shall submit to the Resident Engineer/Contracting

Officer’s Technical Representative (COR) for review and approval

5 sets of design documentation showing structural design of the complete Columbarium. This documentation shall include dimensions, methods of construction, and calculations. All design calculations and drawings shall be signed and sealed by qualified Professional

Structural Engineer.

G. Functional Load Tests: If required by the Resident Engineer/COR, a functional load test will be made at the Contractor’s expense to insure

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03 48 24 that the columbarium proposed by the Contractor, as furnished, will be capable of supporting loads stated in Article 1.3.F.2. The functional test will consist of the following loading conditions:

1. Unconfined Loading: The columbarium will be placed on a flat surface with no support against the sides. The entire top of the columbarium will be subjected to a simulated uniform load of live load of 240 Kgs./Square Meter (50 lb./ft²) and required dead load simulating cap, mortar, and grout as they will be installed. The load will be maintained for no less than 72 hours. At end of the loading period, the maximum deflection of the Columbarium top elements shall be no more than 3 mm (1/8”). Upon removal of the load from the unit the residual deflection shall be no more than 1.5 mm (1/16”) and concrete elements shall be free of all structural distress.

1.4 MANUFACTURER AND INSTALLER QUALIFICATIONS

A. Precast concrete columbarium units shall be product of manufacturer who has a minimum of 3 years experience in fabrication of the precast concrete columbarium units similar in material, design, and quantity to that indicated on the drawings and specified herein.

B. Precast concrete columbarium units installer shall have been regularly engaged for at least three years in installation of precast concrete similar to this project.

C. Supply and Installation of fastener system shall be by product manufacturers and installers, both whom have had a minimum of 3 years experience in installation of similar design to that indicated on the drawing.

D. Installation of niche covers will be performed by those companies who have demonstrated previous experience in installation of similar design as indicated in the drawings and specified herein.

1.5 ALLOWABLE TOLERANCES

A. In addition to tolerances of individual elements required by American

Concrete Institute Publication 533.3R, erection tolerances shall be as follows:

1. Variation of anchors and fasteners from dimensions specified........... 3 mm.(1/8”)

2. Variation in overall dimensions of precast element (height and width).............. 3 mm.(1/8”)

3. Maximum differential between adjacent units in erected position............ 3 mm.(1/8”)

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4. Variation in thickness of precast panels and elements................ 3 mm.(1/8”)

5. Maximum vertical differential between adjacent columbarium units in installed position........... 3mm.(1/8")

1.6 SUBMITTALS

A. In accordance with Division 1 Section 01 33 23 SHOP DRAWINGS, PRODUCT

DATA, and SAMPLES, furnish the following:

1. Samples of all fastening systems, mounting hardware and exposed surface finishes including, but not limited to, the following:

a. Stainless Steel Angle

b. Stainless Steel Bolt, Nut and Washers

c. Tamper Proof Stainless Steel Bolt

d. Stainless Steel Rosette

e. Stainless Steel Expansion Anchors, Bolts and pins

f. Stainless Steel Ferrule loop insert.

g. Shims

2. Samples of two complete Precast Concrete Columbarium Units, to demonstrate quality of construction and color, delivered to the site to be approved prior to production.

3 Samples of adhesives and grouts.

4. Shop Drawings: Complete shop and erection drawings of all precast concrete columbarium units, showing all dimensions and details of construction, installation and relation to adjoining work, reinforcements, anchorage, attachments, inserts, location of all pre-drilled sleeves and other items to be installed in the work of other trades, joint treatment, joint alignment coordinated with cap stone joints, and other work required for a complete installation.

Provide evidence that the Contractor to be installing the cast in place concrete foundations for the columbarium and pier units has been contacted prior to any work relating to the footings for the columbarium construction, and that the construction of the concrete support (foundations) work has been coordinated with the precast columbarium unit manufacturer and installer.

5. Production Drawings:

a. Elevation view of each structural element.

b. Planimetric view of unit.

c. Sections and details to show quantities and position of

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03 48 24 reinforcing steel, anchors, inserts, and essential embedded and non-embedded hardware for fabrication, handling, transportation and installation.

d. Lifting and erection inserts.

e. Dimensions and finishes.

f. Method of transportation.

g. Method of erection and handling.

6. Manufacturer’s Literature and Data:

a. Each type of Concrete Fastener, including adhesive and anchor devices.

b. Instructions for final cleaning

c. Concrete coloring admixture, including color charts of manufacturers standard color palette.

7. Certificates: Manufacturer’s qualifications specifying precast concrete columbarium units meet the requirements of ACI 533.3R and as specified.

8. Certificates: Installer’s qualifications documenting the quality and quantity of experience of the precast concrete installer in the installation of Precast Concrete structures and custom units.

9. Arizona State registered structural engineer stamped columbarium and load calculation drawings.

10. Mock-ups: Provide full-scale mockup as shown on Sheet A-105. Mockup shall include columbaria, CMU end walls, structural columns, stone veneer, and stone caps. Approved mockup may remain in place and may be incorporated into the final work.

1.7 DELIVERY, STORAGE

Ship precast concrete columbarium units to site with adequate protection to prevent chipping, breaking and other damage. Materials shall be marked giving proper identifications and location. Store materials in protected areas to prevent damage including vandalism, injurious effects of weather and inclusion of foreign matter.

1.8 COORDINATION

Coordinate the manufacture and erection of precast concrete columbarium units with related work of other sections of the Specifications. Provide templates for inserts and other devices for anchoring precast concrete columbarium units to the work of other trades, in sufficient time to be built into adjoining construction. Perform cutting, fitting and other related work in connection with erection of precast concrete columbarium

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03 48 24 unit work. See Section 01 33 23 SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES for details regarding the coordination of work.

1.9 GUARANTEE

Guarantee precast concrete columbarium unit work, including anchorage, joint treatment and related components to be free from all defects in materials and workmanship, including cracking and spalling, and after erection, completed work will be subject to terms of “Guarantee” article in Division 1 Specification Sections except that guarantee period is one year.

1.10 APPLICABLE PUBLICATIONS

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

B. Federal Specifications (Fed. Spec.):

QQ-S-766C (5)...........Steel Plates, Sheets, and Strip-Corrosion

Resisting

QQ-W-423B...............Wire, Steel, Corrosive-Resisting

TT-S-00227E (3).........Sealing Compound Elastomeric Type, Multi-

Component (For Caulking, Sealing, And Glazing In

Building And Other Structures)

TT-S-00230C (2).........Sealing Compound: Elastomeric Type, Single

Component (For Caulking, Sealing and Glazing In

Building and Other Structures)

C. American Concrete Institute (ACI) Publications:

ACI 533.3R-70...........Fabrication, Handling And Erection of Precast

Concrete.

D. American Society for Testing Materials (ASTM) Standards:

A36/A36M-08 ............Structural Steel

A82/A82M-07 ............Steel Wire, Plain, for Concrete Reinforcement

A185/A185M-07 ..........Welded Steel Wire Fabric for Concrete

Reinforcement.

ASTM A276-10 ...........Stainless Steel Bars and Shapes

A615/A615M-08b..........Deformed and Plain Billet-Steel Bars for

Concrete Reinforcement.

C33-08..................Concrete Aggregates

C150-07 ................Portland Cement

ASTM C979 ..............Standard Specifications for Integrally Colored

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Concrete

E. American Welding Society (AWS) Publications:

AWS D1.1-90.............Structural Welding Code

AWS D1.4-80.............Welding Reinforcing Steel

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURER

A. Manufacturers that have previously completed at least one successful NCA columbarium project are deemed to be acceptable for processing their units through the procedures according to these specifications and the drawings.

B. Manufacturers that do not have previous successful experience for a NCA columbarium project may be selected by the Contractor for the project.

Contractor is hereby notified that the submittal process for a manufacturer with no previous NCA experience with a successful columbarium project, typically takes longer to process.

2.2 COARSE AGGREGATE

Hard durable aggregate carefully graded from coarse to fine in proportions required to match approved samples of precast concrete columbarium units.

2.3 AGGREGATE FOR BACK-UP MIX (FINE AND COARSE AGGREGATE LIGHTWEIGHT):

ASTM C33. Limit gradation as required to produce the specified appearance and quality of concrete.

2.4 PORTLAND CEMENT

ASTM C150, Type I and Type II; Color as required.

2.5 STRUCTURAL STEEL

ASTM A36.

2.6 STEEL FABRIC REINFORCEMENT

ASTM A185, galvanized.

2.7 STEEL WIRE REINFORCEMENT

ASTM A82, cold drawn.

2.8 REINFORCING STEEL

ASTM A615, deformed, Grade 60.

2.9 MISCELLANEOUS GALVANIZED STEEL ITEMS

Bolts, nuts, washers, anchors, inserts, and the like for handling, erection, or use by trades.

2.10 MARBLE NICHE COVERS

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Marble niche covers shall be furnished by the Government and delivered to the site on pallets and shall be of size, type, finish and quantities required for this project. Contractor and Government representatives shall inspect the niche covers upon delivery to the site. The general quantity and condition shall be observed and an adequate count to cover all the installed columbarium units, plus required spares shall be verified. Once the niche covers are accepted at the site, they shall become the Contractors responsibility until installed and the installation is accepted by the Resident Engineer/COR.

2.11 NICHE COVER ATTACHMENT HARDWARE (ROSETTES)

A. VA National Cemetery Administration, standard stainless steel rosette, mounting brackets, and bolts for complete attachment of the niche covers to the precast columbarium units as shown on drawings:

1. ASTM Type 316 stainless steel sheet goods, 0.100 inch thick

2. Die stamp, producing an eight-petal flower pattern as shown on drawings, one-inch diameter with slight convex; center hole of

0.218", concentric to outer edge, with shoulder recess of 0.400" in diameter and 0.035" in depth.

3. Luster finish.

4. ASTM Type 316 stainless steel tamper-resistant bolts, nuts, washers, anchors, mounting brackets, inserts and the like.

2.12 BACK-UP MATERIAL

Closed cell neoprene, butyl, polyurethane, vinyl or polyethylene foam rod, diameter approximately 1-1/3 times the joint width.

2.13 BOND BREAKERS IF USED

Type and material recommended by sealant manufacturer.

2.14 SEALING COMPOUND IF USED

Fed. Spec. TT-S-00230 C, Type II, Class A, or ASTM C 920-87, Type S, Grade NS, Class 25.

2.15 COLORING ADMIXTURE

ASTM C979, synthetic or natural mineral-oxide pigments or color water-reducing admixtures, temperature stable and non-fading. Admixture to produce a color which exactly matches the designated sample. The designated sample for color only is the existing cap for columbarium wall

D9/D10. The closest approximation of color is Yosemite Brown (641) or

Sequoia Sand (641) by Davis Colors, 800-356-4848, www.daviscolors.com.

2.16 FABRICATION

A. Precast concrete columbarium units shall NOT be: fabricated, delivered or

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03 48 24 incorporated in the work until samples and mock-up have been approved.

Precast concrete shall comply with ACI 533.3R, except as modified herein.

1. Concrete for precast columbarium units shall have a color admixture integrated into the mix and an acid-etched finish.

2. Concrete for precast columbarium units shall have minimum compressive strength of 34.5 MPa (5,000 psi) at 28 days.

3. Provide additional steel reinforcing as required for casting, handling and erection loads.

4. Back-up Mix: Porosity, strength, weight and gradation of coarse aggregate shall be as required to produce specified characteristics.

5. Columbarium units shall be cast in steel forms designed to suit shape and finish required and to withstand high frequency vibration.

Concrete shall be deposited in oiled forms. Form oil shall be non-staining type. Vibrations, where required, shall be continuous during process of casting to attain through compaction, complete embedment of reinforcement and to assure concrete of uniform and maximum density without segregation of mix and full thickness of precast element is attained.

a. Anchors, lifting devices, provisions for cutouts and openings, dovetail slots, notches, reglets, inserts and similar items required for the work of other trades shall be accurately positioned in forms before casting elements.

b. All fastener location holes, including those for anchoring of units and attachment of niche covers, shall be cast into units.

Drilling to precast concrete columbarium units, after fabrication, shall not be acceptable.

6. Cement, aggregate, water and integral coloring admixtures shall be obtained from single sources for facing mix of precast concrete work in order to assure regularity of appearance and uniformity of color.

7. Finish: Create an acid-etched finish using acid and hot-water solution, equipment, application techniques, and cleaning procedures to expose aggregate and surrounding matrix surfaces. Protect hardware, connections, and insulation from acid attach. The face of the units shall be processed by the manufacturer, following removal from the forms to insure that the discoloration and blemishes on the niche faces are removed before shipping to the site.

a. Back side of single columbarium units, with back exposed to view shall have a stone veneer surface finish as indicated on the drawings.

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7. Curing: Precast concrete shall be cured as required to develop specified structural characteristics and shall be stored in a manner that will permit all surfaces to cure equally and minimize warping, without staining the exposed faces.

PART 3 - EXECUTION

3.1 HANDLING AND INSTALLATION

A. Before beginning installation, inspect work of other trades in-so-far as it affects the work of this Section. Install units by competent installation crews meeting the requirements of paragraph 1.4

B. Commencing installation of precast concrete columbarium units will be construed as acceptance, as suitable, of such work of other trades.

Concrete base for the columbarium units shall be inspected and modified as required, grinding off high spots, to become an acceptable base upon which to install the units. Columbarium units shall be handled in a nearly vertical plane at all times and stacked vertically on wood supports of adequate strength, until erected. Cover and protect precast concrete columbarium units against staining and other damage. Reinstall, realign and otherwise correct improperly installed units.

1. Accurately place and securely anchor precast concrete columbarium units to adjoining construction in accordance with approved shop and erection drawings.

3.2 SETTING

A. Each precast element shall be set level and true to line with uniform joints. Joints required to have sealants shall be kept free of dirt and other contaminants for their full depth. Precautions shall be taken to protect precast concrete work from being damaged and soiled during and after installation. Wedges, spacers or other appliances which are likely to cause staining shall be removed from joints.

B. Where shown, joints shall be filled with sealant. Surfaces and other joints for precast concrete columbarium units shall be cleaned of all dust, dirt and other foreign matter.

3.3 SEALING OF JOINTS

A. Where shown and/or wherever required to make the work watertight, joints between precast concrete columbarium units and between other precast elements and adjoining masonry, concrete and other materials shall be filled with back-up material for depth extending as required to form joint of depth as shown or recommended by sealant manufacturer. Provide bond breakers, at base of sealant where space for back-up does not exist and to prevent sealant from bonding to material at base of joint.

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1. Workmanship shall be in accordance with Division 1 Specification

Sections and Section 07 92 00, JOINT SEALANTS.

3.4 CLEANING

After erection is complete, clean precast columbarium units using materials, equipment and methods recommended by manufacturer.

3.5 REPLACEMENT AND REPAIR

Precast concrete columbarium units which are damaged, cracked, stained, improperly fabricated or otherwise defective shall be removed and be replaced. Precast units having minor defects not affecting serviceability or appearance may be repaired when approved by the Resident Engineer.

Repaired work shall be sound, permanent, flush with adjacent surfaces and of color and texture matching similar adjoining surfaces and shall show no line of demarcation between original and patched surfaces. Replacement and repairs shall be done at no additional cost to the Government.

3.6 INSTALLATION OF NICHE COVERS

Install niche covers plumb and level as shown so that exposed faces of niche covers lie in the same plane and that rows of niche covers align both horizontally and vertically. Tighten fasteners to achieve snug fit but do not over tighten to the point where they may crack or break niche covers. Coordinate the installation procedures with the Resident

Engineer/COR and establish the critical visual line for which the best alignment is to be established.

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PART 1 - GENERAL

1.1 DESCRIPTION

SECTION 26 05 41

UNDERGROUND ELECTRICAL CONSTRUCTION

A. This section specifies the furnishing, installation and connection of handholes and ducts to form a complete underground raceway system.

B. “Duct” and “conduit”, and “rigid metal conduit” and “rigid steel conduit are used interchangeably in this specification and have the same meaning.

1.2 RELATED WORK

A. Section 05 50 00, METAL FABRICATIONS: Ladders.

B. Section 07 92 00, JOINT SEALANTS: Sealing of conduit penetrations.

C. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS: General electrical requirements that apply to more than one section of Division

26.

D. Section 01 35 26 GOVERNMENT SAFETY REQUIREMENTS: Requirements for personnel safety and to provide a low impedance path for possible ground fault currents.

E. Section 26 05 33, RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS: Conduits, fittings and boxes for raceway systems.

F. EARTH MOVING Section 31 20 11, EARTH MOVING (Short Form): Trenching, backfill and compaction.

1.3 QUALITY ASSURANCE

A. Refer to Paragraph, QUALIFICATIONS (PRODUCTS AND SERVICES), in Section

26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS.

1.4 SUBMITTALS

A. Submit in accordance with Section 26 05 11, REQUIREMENTS FOR ELECTRICAL

INSTALLATIONS.

1. Shop Drawings:

a. Sufficient information, clearly presented, shall be included to determine compliance with drawings and specifications.

b. Include handholes, duct materials, and hardware. Proposed deviations from details on the drawings shall be clearly marked on the submittals.

c. If necessary to locate ducts or handholes at locations other than shown on the drawings, show the proposed locations accurately on scaled site drawings, and submit four copies to

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2. Certifications: Two weeks prior to final inspection, submit four copies of the following to the Resident Engineer/COR:

a. Certification that the materials are in accordance with the drawings and specifications.

b. Certification, by the Contractor, that the complete installation has been properly installed and tested.

1.5 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only.

B. American Concrete Institute (ACI):

318-14..................Building Code Requirements for Structural

Concrete & Commentary

SP 66-04................ACI Detailing Manual

C. American National Standards Institute (ANSI):

77-13...................Underground Enclosure Integrity

D. American Society for Testing and Materials (ASTM):

C478/C478M-15...........Standard Specification for Precast Reinforced

Concrete Manhole Sections

C858-10..................Underground Precast Concrete Utility Structures

C990/C990M-09...........Joints for Concrete Pipe, Manholes and Precast

Box Sections Using Preformed Flexible Joint

Sealants.

E. National Electrical Manufacturers Association (NEMA):

TC 2-13.................Electrical Polyvinyl Chloride (PVC) Conduit

TC 3-13.................Polyvinyl Chloride (PVC) Fittings for Use With

Rigid PVC Conduit And Tubing

TC 6 & 8-13.............Polyvinyl Chloride (PVC) Plastic Utilities Duct

For Underground Installations

TC 9-04.................Fittings For Polyvinyl Chloride (PVC) Plastic

Utilities Duct For Underground Installation

F. National Fire Protection Association (NFPA):

70-14...................National Electrical Code (NEC)

70E-15..................National Electrical Safety Code

G. Underwriters Laboratories, Inc. (UL):

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6-07....................Electrical Rigid Metal Conduit-Steel

467-13..................Grounding and Bonding Equipment

651-11..................Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings

651A-11.................Schedule 40 and 80 High Density Polyethylene

(HDPE) Conduit

PART 2 - PRODUCTS

2.1 PULLBOXES/HANDHOLDS

A. General: Size shall be 18” x 18” x 18” or as indicated on the drawings. Provide pullboxes with weatherproof, non-skid covers with recessed hook eyes, secured with corrosion- and tamper-resistant hardware. Cover material shall be identical to pullbox material.

Covers shall have molded lettering, ELECTRIC or SIGNAL as applicable. Pullboxes shall comply with the requirements of ANSI 77

Tier 8 loading. Provide pulling irons, 22 mm (0.875 inch) diameter galvanized steel bar with exposed triangular- shaped opening.

B. Polymer Concrete Pullboxes: Shall be molded of sand, aggregate, and polymer resin, and reinforced with steel, fiberglass, or both. Pullbox shall have open bottom.

C. Fiberglass Pullboxes: Shall be sheet-molded, fiberglass-reinforced, polyester resin enclosure joined to polymer concrete top ring or frame.

D. Concrete Pullboxes: Shall be monolithically-poured reinforced concrete.

2.3 DUCTS

A. Number and sizes shall be as shown on the drawings.

B. Ducts (concrete-encased):

1. Plastic Duct:

a. UL 651 and 651A Schedule 40 PVC conduit.

C. Ducts (direct-burial):

1. Plastic duct:

a. Schedule 40 PVC or HDPE conduit or HDPE conduit.

b. Duct shall be suitable for use with 75˚ C (167˚ F) rated conductors.

2. Rigid metal conduit: UL6 and NEMA RN1 galvanized rigid metal, half-lap wrapped with 10 mil PVC tape.

2.4 GROUNDING

A. Ground electrical circuits, equipment and enclosures in accordance with

NFPA 70 and IEEE C2 to provide a permanent, continuous and effective

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26 05 41 path to ground unless otherwise noted by EM 385-1-1. Check grounding circuits to ensure that the circuit between the ground and a grounded power conductor has a resistance low enough to permit sufficient current flow to allow the fuse or circuit breaker to interrupt the current.

2.5 PULL ROPE FOR SPARE DUCTS

A. Plastic with 890 N (200 lb) minimum tensile strength.

PART 3 - EXECUTION

3.1 MANHOLE AND PULLBOX INSTALLATION

A. General Requirements:

1. Assembly and/or installation of manholes and pullboxes shall be per the requirements of the manufacturer.

2. Locate manholes and pullboxes at the approximate locations shown on the drawings with due consideration given to the location of other utilities, grades, and paving.

B. Access: Ensure that top of frames and covers are flush with finished grade.

C. Grounding in Manholes:

1. Ground Rods in Manholes: Drive a ground rod into the earth, through the floor sleeve, after the manhole is set in place. Fill the sleeve with sealant to make a watertight seal. Rods shall protrude approximately 100 mm (4 inches) above the manhole floor.

2. Install a No. 3/0 AWG bare copper ring grounding conductor around the inside perimeter of the manhole and anchor to the walls with metallic cable clips.

3. Connect the ring grounding conductor to the ground rod by an exothermic welding process.

4. Bond the ring grounding conductor to the duct bank equipment grounding conductors, the exposed non-current carrying metal parts of racks, sump covers, and like items in the manholes with a minimum

No. 6 AWG bare copper jumper using an exothermic welding process.

3.2 TRENCHING

A. Refer to Section 31 20 11 EARTH MOVING (SHORT FORM) for trenching back-filling, and compaction.

B. Work with extreme care near existing ducts, conduits, cables, and other utilities to avoid damaging them.

C. Cut the trenches neatly and uniformly.

D. For Concrete Encased Ducts:

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1. After excavation of the trench, stakes shall be driven in the bottom of the trench at 1.2 M (4 feet) intervals to establish the grade and route of the duct bank.

2. Pitch the trenches uniformly towards manholes or both ways from high points between manholes for the required duct line drainage. Avoid pitching the ducts towards buildings wherever possible.

3. The walls of the trench may be used to form the side walls of the duct bank provided that the soil is self-supporting and that concrete envelope can be poured without soil inclusions. Forms are required where the soil is not self-supporting.

4. After the concrete encased duct has sufficiently cured, the trench shall be backfilled to grade with earth, with appropriate warning tape attached.

F. Individual conduits to be installed under existing paved areas and roads that cannot be disturbed shall be jacked into place using rigid metal conduit, or bored using plastic utilities duct or PVC conduit, as approved by the Resident Engineer/COR.

3.3 DUCT INSTALLATION

A. General Requirements:

1. Ducts shall be in accordance with the NEC, as shown on the drawings, and as specified.

2. Join and terminate ducts with fittings recommended by the manufacturer.

3. Slope ducts to drain towards manholes and pullboxes, and away from building and equipment entrances. Pitch not less than 100 mm (4 inch) in 30 M (100 feet).

4. Underground conduit stub-ups and sweeps to equipment inside of buildings shall be galvanized rigid metal conduit half-lap wrapped with PVC tape, and shall extend a minimum of 1.5 M (5 feet) outside the building foundation. Tops of conduits below building slab shall be minimum 610 mm (24 inches) below bottom of slab.

5. Stub-ups and sweeps to equipment mounted on outdoor concrete slabs shall be galvanized rigid metal conduit half-lap wrapped with PVC tape, and shall extend a minimum of 1.5 M (5 feet) away from the edge of slab.

6. Install insulated grounding bushings on the conduit terminations.

7. Radius for sweeps shall be sufficient to accomplish pulls without damage. Minimum radius shall be six times conduit diameter.

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8. All multiple conduit runs shall have conduit spacers. Spacers shall securely support and maintain uniform spacing of the duct assembly a minimum of 75 mm (3 inches) above the bottom of the trench during the concrete pour. Spacer spacing shall not exceed 1.5 M (5 feet).

Secure spacers to ducts and earth to prevent floating during concrete pour. Provide nonferrous tie wires to prevent displacement of the ducts during concrete pour. Tie wires shall not act as substitute for spacers.

9. Duct lines shall be installed no less than 300 mm (12 inches) from other utility systems, such as water, sewer, chilled water.

10. Clearances between individual ducts:

a. For similar services, not less than 75 mm (3 inches).

b. For power and signal services, not less than 150 mm (6 inches).

11. Duct lines shall terminate at window openings in manhole walls as shown on the drawings. All ducts shall be fitted with end bells.

12. Couple the ducts with proper couplings. Stagger couplings in rows and layers to ensure maximum strength and rigidity of the duct bank.

13. Keep ducts clean of earth, sand, or gravel, and seal with tapered plugs upon completion of each portion of the work.

14. Spare Ducts: Where spare ducts are shown, they shall have a nylon pull rope installed. They shall be capped at each end and labeled as to location of the other end.

15. Duct Identification: Place continuous strip of warning tape approximately 300 mm (12 inches) above ducts before backfilling trenches. Warning tape shall be preprinted with proper identification.

16. Duct Sealing: Seal ducts, including spare ducts, at building entrances and at outdoor terminations for equipment, with a suitable non-hardening compound to prevent the entrance of foreign objects and material, moisture, and gases.

17. Use plastic ties to secure cables to insulators on cable arms. Use minimum two ties per cable per insulator.

B. Concrete-Encased Ducts:

1. Install concrete-encased ducts for low-voltage systems, and signal systems, unless otherwise shown on the drawings.

2. Duct banks shall be single or multiple duct assemblies encased in concrete. Ducts shall be uniform in size and material throughout the installation.

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3. Tops of concrete-encased ducts shall be:

a. Not less than 600 mm (24 inches) and not less than shown on the drawings, below finished grade.

b. Not less than 750 mm (30 inches) and not less than shown on the drawings, below roads and other paved surfaces.

c. Additional burial depth shall be required in order to accomplish NEC-required minimum bend radius of ducts.

d. Conduits crossing under grade slab construction joints shall be installed a minimum of 1.2 M (4 feet) below slab.

4. Extend the concrete envelope encasing the ducts not less than 75 mm

(3 inches) beyond the outside walls of the outer ducts.

5. Within 3 M (10 feet} of building and manhole wall penetrations, install reinforcing steel bars at the top and bottom of each concrete envelope to provide protection against vertical shearing.

6. Install reinforcing steel bars at the top and bottom of each concrete envelope of all ducts underneath roadways and parking areas.

7. Where new ducts and concrete envelopes are to be joined to existing manholes, pullboxes, ducts, and concrete envelopes, make the joints with the proper fittings and fabricate the concrete envelopes to ensure smooth durable transitions.

8. Duct joints in concrete may be placed side by side horizontally, but shall be staggered at least 150 mm (6 inches) vertically.

9. Pour each run of concrete envelope between manholes or other terminations in one continuous pour. If more than one pour is necessary, terminate each pour in a vertical plane and install 19 mm

(0.75 inch) reinforcing rod dowels extending 450 mm (18 inches) into concrete on both sides of joint near corners of envelope.

10. Pour concrete so that open spaces are uniformly filled. Do not agitate with power equipment unless approved by Resident

Engineer/COR.

C. Direct-Burial Ducts:

1. Install direct-burial ducts only where shown on the drawings.

Provide direct-burial ducts only for low-voltage power and lighting branch circuits.

2. Tops of ducts shall be:

a. Not less than 600 mm (24 inches) and not less than shown on the drawings, below finished grade.

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b. Not less than 750 mm (30 inches) and not less than shown on the drawings, below roads and other paved surfaces.

c. Additional burial depth shall be required in order to accomplish NEC-required minimum bend radius of ducts.

3. Do not kink the ducts. Compaction shall not deform the ducts.//

D. Connections to Manholes: Ducts connecting to manholes shall be flared to have an enlarged cross-section to provide additional shear strength.

Dimensions of the flared cross-section shall be larger than the corresponding manhole opening dimensions by no less than 300 mm (12 inches) in each direction. Perimeter of the duct bank opening in the manhole shall be flared toward the inside or keyed to provide a positive interlock between the duct and the wall of the manhole. Use vibrators when this portion of the encasement is poured to ensure a seal between the envelope and the wall of the structure.

E. Connections to Existing Manholes: For duct connections to existing manholes, break the structure wall out to the dimensions required and preserve the steel in the structure wall. Cut steel and extend into the duct bank envelope. Chip the perimeter surface of the duct bank opening to form a key or flared surface, providing a positive connection with the duct bank envelope.

F. Connections to Existing Ducts: Where connections to existing ducts are indicated, excavate around the ducts as necessary. Cut off the ducts and remove loose concrete from inside before installing new ducts. Provide a reinforced-concrete collar, poured monolithically with the new ducts, to take the shear at the joint of the duct banks.

G. Partially-Completed Ducts: During construction, wherever a construction joint is necessary in a duct bank, prevent debris such as mud and dirt from entering ducts by providing suitable plugs. Fit concrete envelope of a partially completed duct with reinforcing steel extending a minimum of 600 mm (2 feet) back into the envelope and a minimum of 600 mm (2 feet) beyond the end of the envelope. Provide one No. 4 bar in each corner, 75 mm (3 inches) from the edge of the envelope. Secure corner bars with two No. 3 ties, spaced approximately 300 mm (12 inches) apart.

Restrain reinforcing assembly from moving during pouring of concrete.

3.4 ACCEPTANCE CHECKS AND TESTS

A. Duct Testing and Cleaning:

1. Upon completion of the duct installation, a standard flexible mandrel shall be pulled through each duct to loosen particles of earth, sand, or foreign material left in the duct, and to test for

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2. The mandrel shall be not less than 300 mm (12 inches) long, and shall have a diameter not less than 13 mm (0.5 inch) less than the inside diameter of the duct. A brush with stiff bristles shall then be pulled through each duct to remove the loosened particles. The diameter of the brush shall be the same as, or slightly larger than, the diameter of the duct.

3. If testing reveals obstructions or out-of-round conditions, the

Contractor shall replace affected section(s) of duct and retest to the satisfaction of the Resident Engineer/COR.

4. Mandrel pulls shall be witnessed by the Resident Engineer/COR.

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