SOW_Att_2_-_202_Specifications.pdf

NIST Building 202 – Deteriorated HVAC System

CLIN 0001 and 0002 Table of Contents - 1

TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

See separate document consolidated for CLIN’s 0001 through 0007

DIVISION 02 – EXISTING CONDITIONS

024100 Demolition

DIVISION 04 – MASONRY

040120.70 Unit Masonry Restoration

042000 Unit Masonry

DIVISION 05 – METALS

051200 Structural Steel Framing 055000 Metal Fabrications

DIVISION 06 – WOOD, PLASTICS, AND COMPOSITES

061000 Rough Carpentry

DIVISION 07 – THERMAL AND MOISTURE PROTECTION

074213 Metal Wall Panels 078413 Penetration Firestopping 079200 Joint Sealants

DIVISION 23 – HEATING, VENTILATING, AND AIR CONDITIONING (HVAC)

230500 Common Work Results for HVAC 230513 Common Motor Requirements for HVAC Equipment 230517 Sleeves and Sleeve Seals for HVAC Piping 230518 Escutcheons for HVAC Piping 230523 General Duty Valves for HVAC Piping 230529 Hangers and Supports for HVAC Piping and Equipment 230548 Vibration and Seismic Controls for HVAC Piping and Equipment 230553 Identification for HVAC Piping and Equipment 230593 Testing, Adjusting, and Balancing for HVAC 230700 HVAC Insulation 230923 Direct Digital Controls 232113 Hydronic Piping 232213 Steam and Condensate Heating Piping 233113 Metal Ducts 233300 Air Duct Accessories 233750 Mechanical Louvers 237323 Custom Air Handling Units 238216 Air Coil

NIST Building 202 – Deteriorated HVAC System

CLIN 0001 and 0002 Table of Contents - 2

DIVISION 26 - ELECTRICAL

260500 Common Work Results for Electrical 260519 Low-Voltage Electrical Power Conductors and Cables 260526 Grounding and Bonding for Electrical Systems 260529 Hangers and Supports for Electrical Systems 260533 Raceways and Boxes for Electrical Systems 260553 Identification for Electrical Systems 260573 Overcurrent Protective Device Coordination Study 262416 Panelboards 262923 Ultra-Low Harmonic Variable Frequency Drive

DIVISION 28 – ELECTRONIC SAFETY AND SECURITY

283111 Digital, Addressable Fire-Alarm System

SECTION 02 41 00 Page 1

SECTION 02 41 00

DEMOLITION

PART 1 GENERAL

1.1 PROJECT DESCRIPTION

Demolition consists of removal of existing metal louvers and masonry wall to prepare access for removal and replacement of air handler units.

1.1.1 General Requirements

Do not begin demolition until authorization is rece ived from the Contracting Officer. Remove rubbish and debris fro m the site daily.. Store materials that cannot be removed dai ly in areas specified by the Contracting Officer. In the inter est of occupational safety and health, perform the work in accordance w ith EM 385-1-1, Section 23, Demolition, and other applicable Sectio ns.

1.2 ITEMS TO REMAIN IN PLACE

Take necessary precautions to avoid damage to exist ing items to remain in place, to be reused, or to remain the property o f the Government.

Repair or replace damaged items as approved by the Contracting Officer. Coordinate the work of this section with all other work indicated.

1.2.1 Existing Construction Limits and Protection

Do not disturb existing construction beyond the ext ent indicated or necessary for installation of new construction. Pr ovide protective measures to control accumulation and migration of d ust and dirt in all work areas. Remove debris from work areas daily.

1.2.2 Weather Protection

For portions of the building to remain, protect bui lding interior and materials and equipment from the weather at all tim es. Where removal of existing louvers and masonry is necessary to accomplish work , have materials and workmen ready to provide adequate and temporary covering of exposed areas.

1.2.3 Facilities

Protect electrical and mechanical services and util ities.

NIST Building 202Deteriorated HVAC System Task Order No. 16392

SECTION 02 41 00 Page 2

1.3 SUBMITTALS

Government approval is required for the Demolition Plan.

1.4 QUALITY ASSURANCE

Submit timely notification of demolition and renova tion project to Federal, State, regional and local authorities in a ccordance with 40 CFR 61, Subpart M. Notify the Contracting Officer in writing 10 working days prior to the commencement of work in a ccordance with 40 CFR 61, Subpart M. Comply with federal, state, and local hauling and disposal regulations.

1.4.1 Dust and Debris Control

Prevent the spread of dust and debris to occupied p ortions of the building and avoid the creation of a nuisance or ha zard in the surrounding area. Do not use water if it results i n hazardous or objectionable conditions such as, but not limited t o, ice, flooding or pollution.

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1.6 EXISTING CONDITIONS

Before beginning any demolition or deconstruction w ork, survey the site and examine the drawings and specifications to determine the extent of the work. Record existing conditions in the presence of the Contracting Officer showing the condition of struct ures and other facilities adjacent to areas of alteration or remov al. Photographs sized 4 inch x 4 inch will be acceptable as a recor d of existing conditions. Include in the record possible conflic ting electrical conduits, plumbing lines, alarms systems, the locat ion and extent of existing cracks and other damage and description of surface conditions that existing prior to b fore starting work. It is the Contractor’s responsibility to verify and document all required outages which will be required during the course of the work, and to n ote these outage on the record document. Submit survey results.

SECTION 04 01 20.70 Page 1

SECTION 04 01 20.70

UNIT MASONRY RESTORATION

PART 1 GENERAL

1.1 ADMINISTRATIVE REQUIREMENTS

1.1.1 Pre-Installation Meeting

Prior to beginning the masonry restoration work, co nvene a meeting with the Contracting Officer’s Representative to re view the extent of restoration activities.

1.2 SUBMITTALS

SD-03 PRODUCT DATA

Mortar Mix

SD-04 SAMPLES

Brick to match existing Mortar to match existing Mockup to review mortar color

1.3 QUALITY CONTROL

1.3.1 Mockups: Perform repointing on an inconspicu ous section of actual construction. Size to be 3 feet x 3 feet o r as appropriate for the repair specified.

PART 2 PRODUCTS

2.1 REPAIR MATERIALS

2.1.1 Mortar: Type N or O mortar to the original e xisting material in color, texture and tooling.

2.1.2 Clay Brick:

a. Provide a replacement brick matching color, shap e, size, texture, appearance and thermal expansion properties of the existing brick.

b. Do not use reclaimed brick unless approved by Co ntracting Officer.

c. Provide brick meeting the requirements of ASTM C 216 Grade SW, including a rating of “not effloresced”.

2.1.3 Water: Obtain potable water from a local sou rce. Filter to remove minerals resulting in a neutral pH, prior to application.

PART 3 EXECUTION

SECTION 04 01 20.70 Page 2

3.1 REPOINTING

Repoint masonry in accordance with NPS TPS Brief 2, using ASTM E2260 as a reference guide.

3.1.1 Wall Preparation: Remove old caulking, grout , or loose mortar from discontinuous or non-adhered joints to a minim um depth of 2.5 times the width of the joint. Where directed, cut joints back to sound, solid backup material. Leave a clean, squar e face at the back of the joint to provide for a maximum contact of re pointing mortar.

a. Shallow or feather edging is not permitted. Re move loose particles from joints. Clean joints, followed by b lowing with filtered, dry compressed air or vacuum.

b. Soak exposed surfaces of historic masonry adjac ent to joint with water prior to repointing or masonry replacement.

c. Maintain a water sprayer on site at all times d uring repointing and masonry replacement.

3.2 BRICK REPLACEMENT

Remove masonry that has deteriorated or is damaged beyond repair, as determined by field review with the Contracting Off icers Representative. Carefully demolish or remove entir e units from joint to joint, without damaging surrounding units in a m anner that permits replacement with full-size units. Support and prot ect remaining masonry work that surrounds removal area. Notify Co ntracting Officer of unforeseen detrimental conditions including void s, cracks, bulges and loose masonry units in existing masonry backup and other deteriorated items.

a. Remove mortar, loose particles, and soil from e xisting masonry to remain at brick replacement by cleaning with hand c hisels, non-metallic brushes and water.

b. Point mortar joints at replacement units to mat ch the rest of the wall after new units have been properly installed a nd adjusted.

__ End of Section --

SECTION 04 20 00

UNIT MASONRY

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this s pecification to the extent referenced. The publications are referred t o within the text by the basic designation only.

AMERICAN CONCRETE INSTITUTE INTERNATIONAL (ACI)

ACI 216.1 (2014) Code Requirements for Determining Fire Resistance of Concrete and Masonry Construction Assemblies

ACI SP-66 (2004) ACI Detailing Manual

ASTM INTERNATIONAL (ASTM)

ASTM A1008/A1008M (2015) Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardened

ASTM A1064/A1064M (2016a) Standard Specification for Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A167 (2011) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

ASTM A185/A185M (2007) Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete

ASTM A641/A641M (2009a; R 2014) Standard Specification for Zinc-Coated (Galvanized) Carbon Steel Wire

ASTM A653/A653M (2015; E 2016) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

SECTION 04 20 00 Page 1

ASTM A951/A951M (2011) Standard Specification for Steel Wire for Masonry Joint Reinforcement

ASTM B370 (2012) Standard Specification for Copper Sheet and Strip for Building Construction

ASTM C1384 (2012a) Standard Specification for Admixtures for Masonry Mortars

ASTM C1611/C1611M (2014) Standard Test Method for Slump Flow of Self-Consolidating Concrete

ASTM C207 (2006; R 2011) Standard Specification for Hydrated Lime for Masonry Purposes

ASTM C216 (2015) Facing Brick (Solid Masonry Units Made from Clay or Shale)

ASTM C270 (2014a) Standard Specification for Mortar for Unit Masonry

ASTM C494/C494M (2015a) Standard Specification for Chemical Admixtures for Concrete

ASTM C62 (2013a) Building Brick (Solid Masonry Units Made from Clay or Shale)

ASTM C641 (2009) Staining Materials in Lightweight Concrete Aggregates

ASTM C652 (2015) Hollow Brick (Hollow Masonry Units Made from Clay or Shale)

ASTM C67 (2014) Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile

ASTM C780 (2015a) Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry

ASTM C979/C979M (2016) Pigments for Integrally Colored Concrete

THE MASONRY SOCIETY (TMS)

TMS MSJC (2011) Masonry Standard Joint Committee's (MSJC) Book - Building Code Requirements and Specification for Masonry Structures, Containing TMS 402/ACI 530/ASCE 5, TMS 602/ACI 530.1/ASCE 6, and Companion

SECTION 04 20 00 Page 2

Commentaries

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Co ntractor Quality Control approval. When used, a designa tion following the "G" designation identifies the office that will review the submittal for the Government. Submittals with an "S" are for inclus ion in the Sustainability Notebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Reinforcement Detail Drawings;

SD-03 Product Data

Hot Weather Procedures;

Cold Weather Procedures;

Clay or Shale Brick;

Salvaged Brick;

Cement; G Cementitious Materials;

SD-04 Samples

Mock-Up Panel; G Clay or Shale Brick;

Admixtures for Masonry Mortar;

Anchors, Ties, and Bar Positioners;

Joint Reinforcement;

Clay Masonry Expansion-Joint Materials;

Insulation;

SD-05 Design Data

Masonry Compressive Strength;

Bracing Calculations;

SD-06 Test Reports

Efflorescence Test

SD-07 Certificates

Clay or Shale Brick Cementitious Materials Admixtures for Masonry Mortar Anchors, Ties, and Bar Positioners Joint Reinforcement

SD-08 Manufacturer's Instructions

SECTION 04 20 00 Page 3

Admixtures for Masonry Mortar

SD-10 Operation and Maintenance Data

Take-Back Program

SD-11 Closeout Submittals

Recycled Content of Clay Units; S

1.3 QUALITY ASSURANCE

1.3.1 Masonry Mock-Up Panels

1.3.1.1 Mock-Up Panel Location

After material samples are approved and prior to st arting masonry work, construct a mock-up panel for each type and color o f masonry required. At least 48 hours prior to constructing the panel or p anels, submit written notification to the Contracting Officer. Do not bu ild-in mock-up panels as part of the structure; locate mock-up panels where directed. Construct portable mock-up panels or locate in an area where they will not be disrupted during construction.

1.3.1.2 Mock-Up Panel Configuration

Construct mock-up panels L-shaped or otherwise conf igured to represent all of the wall elements. Construct panels of the size necessary to demonstrate the acceptable level of workmanship for each type of masonry represented on the project. Provide a straight pan el or a leg of an L-shaped panel of minimum size 2.5 m 8 feet long by 1.8 m 6 feet high.

1.3.1.3 Mock-Up Panel Composition

Show full color range, texture, and bond pattern of the masonry work.

Demonstrate mortar joint tooling; grouting of reinf orced vertical cores, collar joints, bond beams, and lintels; positioning , securing, and lapping of reinforcing steel; positioning and lapping of jo int reinforcement (including prefabricated corners); and cleaning of masonry work during the construction of the panels. Also include installat ion or application procedures for anchors, wall ties, CMU control join ts, brick expansion joints, insulation, flashing, brick soldier, row lo ck courses and weeps.

Include a masonry bonded corner parging and installation of electrical boxes

1.3.1.4 Mock-Up Panel Construction Method

Where anchored veneer walls or cavity walls are req uired, demonstrate and receive approval for the method of construction; i. e., either bring up the two wythes together or separately, with the insulat ion and appropriate ties and conduit. When the panel represents reinforced mas onry, include a 610 by 610 mm 2 by 2 foot opening placed at least 610 mm 2 feet above the panel base and 610 mm 2 feet away from all free edges, co rners, and control joints. Provide required reinforcing around this o pening as well as at wall corners and control joints.

SECTION 04 20 00 Page 4 placed within the specified tolerances across the c avity. Demonstrate provisions to preclude mortar or grout droppings in the cavity and to provide a clear open air space of the dimensions sh own on the drawings.

Where masonry is to be grouted, demonstrate and rec eive approval on the method that will be used to bring up the masonry wy thes; support the reinforcing bars; and grout cells, bond beams, lint els, and collar joints using the requirements specified herein. When wate r-repellent is specified to be applied to the masonry, apply the approved pr oduct to the mock-up panel. Construct panels on a properly designed con crete foundation.

1.3.1.5 Mock-Up Panel Purpose

The completed panels is used as the standard of wor kmanship for the type of masonry represented. Do not commence masonry work until the mock-up panel for that type of masonry construction has been comp leted and approved.

Protect panels from the weather and construction op erations until the masonry work has been completed and approved. Perf orm cleaning procedures on the mockup and obtain approval of the Contractin g Officer prior to cleaning the building. After completion of the wor k, completely remove the mock-up panels, including all foundation concrete, from the construction site.

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver, store, handle, and protect material to avo id chipping, breakage, and contact with soil or contaminating material. S tore and prepare materials in already disturbed areas to minimize pr oject site disturbance and size of project site.

1.4.1 Masonry Units

Cover and protect masonry units from precipitation. Conform to handling and storage requirements of TMS MSJC.

a. Pack glazed brick, glazed structural clay tile , and prefaced concrete masonry units in the manufacturer's standard paper cartons, trays, or shrink wrapped pallets with a divider between each unit. Do not stack pallets. Do not remove units from cartons until ca rtons are placed on scaffolds or in the location where units are to be laid.

1.4.2 Reinforcement, Anchors, and Ties

Store steel reinforcing bars, coated anchors, ties, and joint reinforcement above the ground. Maintain steel reinforcing bars and uncoated ties free of loose mill scale and loose rust.

1.4.3 Cementitious Materials, Sand and Aggregates

Deliver cementitious and other packaged materials i n unopened containers, plainly marked and labeled with manufacturers' name s and brands. Store cementitious material in dry, weathertight enclosur es or completely cover.

Handle cementitious materials in a manner that will prevent the inclusion of foreign materials and damage by water or dampnes s. Store sand and aggregates in a manner to prevent contamination and segregation.

1.5 PROJECT/SITE CONDITIONS

SECTION 04 20 00 Page 5

Conform to TMS MSJC for hot and cold weather masonr y erection.

1.5.1 Hot Weather Procedures

When ambient air temperature exceeds 100 degrees F, or exceeds 90 degrees F and the wind velocity is greater than 8 mph, comply with TMS MSJC Article

1.8 D for: preparation prior to conducting masonry work; construction while masonry work is in progress; and protection f or newly completed masonry.

1.5.2 Cold Weather Procedures

When ambient temperature is below 40 degrees F, com ply with TMS MSJC Article 1.8 C for: preparation prior to conducting masonry work;

construction while masonry work is in progress; and protection for newly completed masonry.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.1.1 Design - Specified Compressive Strength of Masonry

The specified compressive strength of brick, f'm, i s 3000 psi.

2.1.2 Performance - Verify Masonry Compressive St rength

Verify specified compressive strength of masonry us ing the "Unit Strength Method" of TMS MSJC. Submit calculations and certi fications of unit and mortar strength.

Verify specified compressive strength of masonry us ing the "Prism Test Method" of TMS MSJC when the "Unit Strength Method" cannot be used. Submit test results.

2.2 MANUFACTURED UNITS

2.2.1 General Requirements

Do not change the source of materials, which will a ffect the appearance of the finished work, after the work has started excep t with Contracting Officer's approval. Submit test reports from an ap proved independent laboratory. Certify test reports on a previously t ested material as the same materials as that proposed for use in this pro ject. Submit certificates of compliance stating that the materia ls meet the specified requirements.

2.2.2 Clay or Shale Brick

2.2.2.1 General

2.2.2.1.1 Sample Submittal

Submit brick samples as specified, showing the colo r range and texture of clay or shale brick. Limit units used on the proje ct to those that conform to the approved sample. Submit sample of colored m ortar with applicable masonry unit and color samples of three stretcher u nits and one unit for

SECTION 04 20 00 Page 6 each type of special shape.Brick selection: Glen-Gery S93 Rome Grey Smooth.

2.2.2.1.2 Uniformity

Manufacture bricks at one time and from the same r un. Deliver clay or shale brick units factory-blended to provide a unif orm appearance and color range in the completed wall.

[]2.2.2.1.3 Efflorescence Test

Test clay brick that will be exposed to weathering for efflorescence in accordance with ASTM C67. Schedule tests far enoug h in advance of starting masonry work to permit retesting if necessary. Uni ts meeting the definition of "effloresced" are subject to rejectio n.

2.2.2.2 Solid Clay or Shale Brick

Provide solid clay or shale brick that conforms to ASTM C216, Type FBX and ASTM C62. Provide brick with minim um compressive strength of 3000 psi. Where brick cores, recesses, or defo rmation would be exposed to view, provide 100 percent solid units. Provide brick with texture and color range to match the brick on display at the ex terior wall.

Provide brick with specified sizes.

a. Modular size, 3-5/8 inches thick, 2-1/4 inches high, and 8 inches long.

2.2.2.3 Hollow Clay or Shale Brick

Provide hollow clay or shale brick that conforms to ASTM C652, Ty pHBX.

a. Provide brick size of 3-5/8 inches thick, 2-1/4 inches high high, and 8 inches long.

b. Where vertical reinforcement is shown in hollow brick, provide hollow brick designed to provide precise vertical alignmen t of the cells, with minimum cell dimension of 2-1/2 inches.

c. Provide hollow brick with minimum compressive s trength of 3000 psi.

2.3 EQUIPMENT

2.3.1 Vibrators

Maintain at least one spare vibrator on site at all times.

2.3.2 Grout Pumps

Pumping through aluminum tubes is not permitted.

2.4 MATERIALS

2.4.1 Mortar Materials

2.4.1.1 Cementitious Materials

SECTION 04 20 00 Page 7

Provide cementitious materials that conform to thos e permitted by ASTM C270.

2.4.1.2 Hydrated Lime and Alternates

Provide lime that conforms to one of the materials permitted by ASTM C207 for use in combination with portland cement, hydrau lic cement, and blended hydraulic cement. Do not use lime in combination w ith masonry cement or mortar cement.

2.4.1.3 Admixtures for Masonry Mortar

In cold weather, use a non-chloride based accelerat ing admixture that conforms to ASTM C1384, unless Type III portland ce ment is used in the mortar.

2.4.1.4 Aggregate and Water

Provide aggregate (sand) and water that conform to materials permitted by

ASTM C270.

2.5 MORTAR AND GROUT MIXES

2.5.1 Mortar Mix

a. Provide mortar Type S unless specified otherwis e herein. Do not use masonry cement in the mortar.

2.6 ACCESSORIES

2.6.1 Anchors, Ties, and Bar Positioners

2.6.1.1 General

a. Fabricate anchors and ties without drips or cri mps. Size anchors and ties to provide a minimum of 5/8 inch mortar cover from each face of masonry.

b. Fabricate steel wire anchors and ties shall fro m wire conforming to ASTM A1064/A1064M and hot-dip galvanize in accordan ce with

ASTM A153/A153M.

e. Submit two anchors, ties and bar positioners of each type used, as samples.

2.6.1.2 Adjustable Anchors

2.6.1.2.1 Anchorage of Veneer to Light Gauge Stee l or Concrete Backing

Use one of the following types of adjustable anchor s to connect veneer to light gauge steel or concrete backing:

b. wire anchors of minimum size W1.7 with ends ben t to form a minimum 2 inches extension and without drips;

SECTION 04 20 00 Page 8

Do not exceed 1/16 inch clearance between connectin g parts of the tie.

Assemble adjustable anchors to prevent disengagemen t. Provide pintle anchors with one or more pintle legs of wire size W 2.8 and an offset not exceeding 1-1/4 inch.

2.6.1.3 Veneer Anchor Screws

Provide screws for attachment of veneer anchors to cold-formed steel framing members of size No. 12. Provide length of screws such that the screws penetrate the holding member by not less tha n 5/8 inch.

2.6.2 Through Wall Flashing and Weeps

2.6.2.1 General

Provide stainless steel sheet, self-adhesive rubber ized sheet, or reinforced membrane sheet flashing except that fla shing indicated to terminate in reglets shall be metal or coated-metal flashing and except that the material shall be one which is not adverse ly affected by dampproofing material.

[2.6.2.2 Reinforced Membrane Flashing

Provide polyester film core with a reinforcing fibe rglass scrim bonded to one side. Provide membrane that is impervious to m oisture, flexible, is not affected by caustic alkalis, and after being ex posed for not less than 1/2 hour to a temperature of 32 degrees F, shows no cracking when, at that temperature, it is bent 180 degrees over a 1/16 inc h diameter mandrel and then bent at the same point over the same size mand rel in the opposite direction 360 degrees.

]2.6.2.3 Weep Ventilators

Provide weep ventilators that are prefabricated fro m stainless steel or plastic. Provide inserts with grill or louver-type openings designed to allow the passage of moisture from cavities and to prevent the entrance of insects, and with a rectangular closure strip to pr event mortar droppings from clogging the opening. Provide ventilators wit h compressible flanges to fit in a standard 3/8 inch wide mortar joint and with height equal to the nominal height of the unit..

2.6.2.4 Metal Drip Edge

Provide stainless steel drip edge, 15-mil thick, he mmed edges, with down-turned drip at the outside edge and upturned d am at the inside edge for use with membrane flashings.

PART 3 EXECUTION

3.1 EXAMINATION

Prior to start of work, verify the applicable condi tions as set forth in TMS MSJC, inspection.

3.2 PREPARATION

3.2.1 Stains

SECTION 04 20 00 Page 9

Protect exposed surfaces from mortar and other stai ns. When mortar joints are tooled, remove mortar from exposed surfaces wit h fiber brushes and wooden paddles. Protect base of walls from splash stains by covering adjacent ground with sand, sawdust, or polyethylene .

3.2.2 Loads

Do not apply uniform loads for at least 12 hours or concentrated loads for at least 72 hours after masonry is constructed. Pr ovide temporary bracing as required.

3.2.3 Concrete Surfaces

Where masonry is to be placed, clean concrete of la itance, dust, dirt, oil, organic matter, or other foreign materials and slig htly roughen to provide a surface texture with a depth of at least 1/8 inch . Sandblast, if necessary, to remove laitance from pores and to exp ose the aggregate.

3.2.4 Shelf Angles

Adjust shelf angles as required to keep the masonry level and at the proper elevation.

3.2.5 Bracing

Provide bracing and scaffolding necessary for mason ry work. Design bracing to resist wind pressure as required by OSHA and loc al codes. Do not remove bracing in less than 10 days.

3.3 ERECTION

3.3.1 General

a. Coordinate masonry work with the work of other trades to accommodate built-in items and to avoid cutting and patching. Lay masonry units in the indicated bond pattern. Lay facing courses lev el with back-up courses, unless the use of adjustable ties has been approved in which case the tolerances is plus or minus 1/2 inch. Adj ust each unit to its final position while mortar is still soft and has p lastic consistency.

b. Remove and clean units that have been disturbed after the mortar has stiffened, and relay with fresh mortar. Keep air s paces, cavities, chases, expansion joints, and spaces to be grouted free from mortar and other debris. Select units to be used in exposed m asonry surfaces from those having the least amount of chipped edges or o ther imperfections detracting from the appearance of the finished work .

c. When necessary to temporarily discontinue the w ork, step (rack) back the masonry for joining when work resumes. Toothin g may be used only when specifically approved by the Contracting Offic er. Before resuming work, remove loose mortar and thoroughly clean the exposed joint.

Cover the top of walls subjected to rain or snow wi th nonstaining waterproof covering or membrane when work is not in process. Extend the covering a minimum of 2 feet down on each side of the wall and hold securely in place.

d. Ensure that units being laid and surfaces to re ceive units are free of

SECTION 04 20 00 Page 10 water film and frost. Lay solid units in a nonfurr owed full bed of mortar. Bevel mortar for veneer wythes and slope d own toward the cavity side. Shove units into place so that the ve rtical joints are tight. Completely fill vertical joints between sol id units with mortar, except where indicated at control, expansio n, and isolation joints. Place hollow units so that mortar extends to the depth of the face shell at heads and beds, unless otherwise indi cated. Mortar will be permitted to protrude up to 1/2 inch into the sp ace or cells to be grouted. Provide means to prevent mortar from drop ping into the space below or clean grout spaces prior to grouting.

3.3.1.1 Jointing

Tool mortar joints when the mortar is thumbprint ha rd. Tool horizontal joints after tooling vertical joints. Brush mortar joints to remove loose and excess mortar.

3.3.1.1.1 Tooled Joints

Tool mortar joints in exposed exterior and interior masonry surfaces concave, using a jointer that is slightly larger th an the joint width so that complete contact is made along the edges of th e unit. Perform tooling so that the mortar is compressed and the joint surf ace is sealed. Use a jointer of sufficient length to obtain a straight a nd true mortar joint.

3.3.1.1.2 Flush Joints

Flush cut mortar joints in concealed masonry surfac es and joints at electrical outlet boxes in wet areas. Finish flush cut joints by cutting off the mortar flush with the face of the wall. Po int joints in unparged masonry walls below grade tight. For architectural units, such as fluted units, completely fill both the head and bed joints and flush cut.

3.3.1.1.3 Door and Window Frame Joints

On the exposed interior side of exterior frames, jo ints between frames and abutting masonry walls shall be raked to a depth of 3/8 inch. On the exterior side of exterior frames, joints between fr ames and abutting masonry walls shall be raked to a depth of 3/8 inch .

3.3.1.1.4 Joint Widths

a. Construct brick masonry with mortar joint width s equal to the difference between the specified and nominal dimens ions of the unit, within tolerances permitted by TMS MSJC.

d. Maintain mortar joint widths within tolerances permitted by TMS MSJC

3.3.1.2 Cutting and Fitting

Use full units of the proper size wherever possible , in lieu of cut units.

Locate cut units where they would have the least im pact on the architectural aesthetic goals of the facility. Per form cutting and fitting, including that required to accommodate the work of others, by masonry mechanics using power masonry saws. Bricks may be wet or dry cut.

Before being placed in the work, dry wet-cut units to the same surface-dry

SECTION 04 20 00 Page 11 appearance as uncut units being laid in the wall. Provide cut edges that are clean, true and sharp.

a. Carefully make openings in the masonry so that wall plates, cover plates or escutcheons required by the installation will completely conceal the openings and will have bottoms parallel with the masonry bed joints. Provide reinforced masonry lintels abo ve openings over 12 inches wide for pipes, ducts, cable trays, and othe r wall penetrations, unless steel sleeves are used.

b. Do not reduce masonry units in size by more tha n one-third in height and one-half in length. Do not locate cut products at ends of walls, corners, and other openings.

3.3.1.3 Unfinished Work

Rack back unfinished work for joining with new work . Toothing may be resorted to only when specifically approved by the Contracting Officer.

Remove loose mortar and thoroughly clean the expose d joints before laying new work.

3.3.1.4 Clay Masonry Expansion Joints

Provide clay masonry expansion joints as indicated. Construct by filling with a compressible foam pad. Ensure that no morta r or other noncompressible materials are within the joint. In stall backer rod and sealant in accordance with Section 07 92 00 JOINT S EALANTS.

3.3.2 Clay or Shale Brick Masonry

3.3.2.1 Brick Placement

Blend all brick at the jobsite from several cubes t o produce a uniform appearance when installed. An observable "banding" or "layering" of colors or textures caused by improperly mixed brick is una cceptable. Lay brick facing with the better face exposed. Lay brick in running bond with each course bonded at corners, unless otherwise indicate d. Lay molded brick with the frog side down. Do not lay brick that is cored, recessed, or has

SECTION 04 20 00 Page 12 other deformations in a manner that allows those de formations to be exposed to view; lay 100 percent solid units in these areas . Completely fill head and bed joints of solid units with mortar. Lay hol low units with mortar joints as specified for concrete masonry units.

Place exterior face of salvaged bricks towards the exterior.

3.3.2.2 Wetting of Units

Wetting of clay, shale brick, or hollow brick units having an initial rate of absorption of more than 1 gram per minute per sq uare inch of bed surface shall be in conformance with ASTM C67. Ensure that each unit is nearly saturated when wetted but surface dry when laid.

Test clay or shale brick daily on the job, prior to laying, as follows:

Using a wax pencil, draw a circle the size of a qua rter on five randomly selected bricks. Apply 20 drops of water with a me dicine dropper to the surface within the circle on each brick. If the av erage time that the water is completely absorbed in the five bricks is less than 1-1/2 minutes, wet bricks represented by the five bricks tested.

3.3.3 Anchored Veneer Construction

a. Construct exterior masonry wythes to the thickn ess indicated on the drawings. Provide a minimum 2 inch air space behin d the masonry veneer. Provide means to ensure that the cavity sp ace and flashings are kept clean of mortar droppings and other loose debris. Maintain chases and raked-out joints free from mortar and de bris.

b. Place masonry in running bond pattern to match existing.

c. For veneer over stud framing, do not install ve neer until the exterior sheathing, moisture barrier, veneer anchors and fla shing have been installed on the backing. Take extreme care to avo id damage to the moisture barrier and flashing during construction o f the masonry veneer. Repair or replace portions of the moisture barrier and flashing that are damaged prior to completion of th e veneer. Provide a continuous cavity with through wall flashing and we eps at bottom of cavity as indicated.

d. For veneer with a masonry backup wythe, lay up both the inner and the outer wythes together except when adjustable joint reinforcement assemblies are approved for use. When both wythes are not brought up together, install through-wall flashings with the e xterior wythe, securing the top edge of the flashing with a termin ation bar and sealant, or protect flashings that are installed wi th the interior wythe from damage until they are fully enclosed in the wall.

e. Provide anchors (ties) to connect the veneer to its backing in sufficient quantity to comply with the following re quirements: maximum wall area per anchor {tie) of 1.75 sq. ft, and maxi mum vertical spacing of 16, and maximum horizontal spacing of 16". Prov ide additional

SECTION 04 20 00 Page 13 anchors around openings larger than 16 inch in eith er direction. Space anchors around perimeter of opening at a maximum of 3 feet at 24 inches on center. Place anchors within 12 inches of openi ngs. Anchors with drips are not permitted.

f. With solid units, embed anchors in mortar joint and extend into the veneer a minimum of 1-1/2 inch, with at least 5/8 i nch mortar cover to the outside face.

g. With hollow units, embed anchors in mortar or g rout and extend into the veneer a minimum of 1-1/2 inch, with at least 5/8 i nch mortar or grout cover to outside face.

3.3.4 ANCHORAGE

3.3.4.1 Anchorage at Intersecting Walls

Provide wire mesh anchors at maximum 16 inches spac ing at intersections of interior non-bearing masonry walls.

3.4 INSTALLATION

3.4.1 Joint Reinforcement Installation

Install joint reinforcement at 400 mm 16 inches on center unless otherwise indicated. Lap joint reinforcement not less than 6 inches. Install prefabricated sections at corners and wall intersec tions. Place the longitudinal wires of joint reinforcement in mortar beds to provide not less than 5/8 inch cover to either face of the unit .

3.4.2 Bond Beams

Reinforce and grout bond beams as indicated and as described in paragraphs above. Install grout barriers under bond beam unit s to retain the grout as required, unless wall is fully grouted or solid bot tom units are used. For high lift grouting in partially grouted masonry, pr ovide grout retaining material on the top of bond beams to prevent upward flow of grout. Ensure that reinforcement is continuous, including around corners, except through control joints or expansion joints, unless otherwis e indicated.

3.4.3 Flashing and Weeps

Install through-wall flashing at obstructions in th e cavity and where indicated on Drawings. Ensure continuity of the fl ashing at laps and inside and outside corners by splicing in a manner approved by the flashing manufacturer. Ensure that the top edge of the flas hing is sealed by lapping a minimum of 150 mm 6 inches under the weat her resistive barrier.

Terminate the horizontal leg of the flashing termin ating the fabric flashing 13 mm 1/2 inch short of the outside face of masonr y and adhering the flashing to a sheet metal drip edge. Provide seala nt below the drip edge of through-wall flashing.

SECTION 04 20 00 Page 14

Wherever through-wall flashing occurs, provide weep holes to drain flashing to exterior at acceptable locations as indicated. Provide weeps of weep ventilators. Locate weeps not m ore than 600 mm 24 inches on centers in mortar joints of the exterior wythe directly on the horizontal leg of through-wall flashing over founda tions, bond beams, and any other horizontal interruptions of the cavity. Place weep holes perfectly horizontal or slightly canted downward to encourage water drainage outward and not inward. Other methods may be used for providing weeps when spacing is reduced to406 mm 16 inches on center and approved by the Contracting Officer. Maintain weeps free of mo rtar and other obstructions.

3.5 APPLICATION

SECTION 04 20 00 Page 15

NIST Building 202Deteriorated HVAC System Task Order No. 16392

3.5.2 Interface with Other Products

3.5.2.1 Built-In Items

Fill spaces around built-in items with mortar. Poi nt openings around flush-mount electrical outlet boxes in wet location s with mortar. Embed anchors, ties, wall plugs, accessories, flashing, p ipe sleeves and other items required to be built-in as the masonry work progresses. Fully embed anchors, ties and joint reinforcement in the mortar . Fill cells receiving anchor bolts and cells of the first course below be aring plates with grout, unless otherwise indicated.

3.5.2.2 Door and Window Frame Joints

On the exposed interior and exterior sides of exter ior frames, rake joints between frames and abutting masonry walls to a dept h of 3/8 inch.

3.5.3 Tolerances

Lay masonry plumb, true to line, with courses level within the tolerances of TMS MSJC, Article 3.3 F.

3.6 FIELD QUALITY CONTROL

3.6.1 Tests

[3.6.1.1 Clay Brick Efflorescence Test

Test clay brick that will be exposed to weathering for efflorescence in accordance with ASTM C67. Schedule tests far enoug h in advance of starting masonry work to permit retesting if necessary. Uni ts meeting the definition of "effloresced" are subject to rejectio n.

3.7 POINTING AND CLEANING

After mortar joints have attained their initial set , but prior to hardening, completely remove mortar and grout daubs and splashings from masonry-unit surfaces that will be exposed or paint ed. Before completion of the work, rake out defects in joints of masonry to be exposed or painted, fill with mortar, and tool to match existi ng joints. Immediately after grout work is completed, remove scum and stai ns that have percolated through the masonry work using a low pressure strea m of water and a stiff bristled brush. Do not clean masonry surfaces, oth er than removing excess surface mortar, until mortar in joints has hardened . Leave masonry surfaces clean, free of mortar daubs, dirt, stain, and discoloration, including scum from cleaning operations, and with t ight mortar joints throughout. Do not use metal tools and metal brush es for cleaning.

3.7.1 Clay Brick Surfaces

Clean exposed clay brick masonry surfaces to obtain surfaces free of stain, dirt, mortar and grout daubs, efflorescence, and di scoloration or scum from cleaning operations. Perform cleaning in accordanc e with the approved cleaning procedure demonstrated on the mockup.

After cleaning, examine the sample panel of similar material for discoloration or stain as a result of cleaning. If the sample panel is discolored or stained, change the method of cleanin g to ensure that the masonry surfaces in the structure will not be adver sely affected.

Water-soak exposed masonry surfaces and then clean with a proprietary masonry cleaning agent specifically recommended for the color and texture by the clay brick manufacturer and manufacturer of the cleaning product.

Apply the solution with stiff fiber brushes, follow ed immediately by thorough rinsing with clean water. Use proprietary cleaning agents in conformance with the cleaning product manufacturer' s printed recommendations. Remove efflorescence in conforman ce with the brick manufacturer's recommendations.

3.8 CLOSE-OUT TAKE-BACK PROGRAM

Collect information from manufacturer for take-back program options. Set aside [masonry units, full and partial as well as s crap and packaging to be returned to manufacturer for recycling into new pro duct. When such a service is not available, seek local recyclers to r eclaim the materials.

Submit documentation that includes contact informat ion, summary of procedures, and the limitations and conditions appl icable to the project.

Indicate manufacturer's commitment to reclaim mater ials for recycling and/or reuse.

3.9 PROTECTION

Protect facing materials against staining. Cover t op of walls with nonstaining waterproof covering or membrane to prot ect from moisture intrusion when work is not in progress. Continue c overing the top of the unfinished walls until the wall is waterproofed wit h a complete roof or parapet system. Extend covering a minimum of 600 m m 2 feet down on each side of the wall and hold securely in place. Befor e starting or resuming work, clean top surface of masonry in place of loos e mortar and foreign

SECTION 04 20 00 Page 16 material.

-- End of Section --

SECTION 04 20 00 Page 17

NIST Building 202 – Deteriorated HVAC System Task Order No. 16-392

ROUGH CARPENTRY

(C) 2017 Field and Tung Structural Engineers

061000 - 1

SECTION 051200 - STRUCTURAL STEEL FRAMING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Structural steel.

2. Grout.

B. Related Requirements:

1. Section 051213 "Architecturally Exposed Structural Steel Framing" for additional requirements for architecturally exposed structural steel.

1.2 DEFINITIONS

A. Structural Steel: Elements of the structural frame indicated on Drawings and as described in

AISC 303, "Code of Standard Practice for Steel Buildings and Bridges."

1.3 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1.4 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. LEED Submittals:

1. Product Data for Credit MR 4: For products having recycled content, documentation indicating percentages by weight of postconsumer and preconsumer recycled content.

Include statement indicating cost for each product having recycled content.

2. Laboratory Test Reports for Credit IEQ 4.2: For primers, documentation indicating that products comply with the testing and product requirements of the California Department of Public Health's (formerly, the California Department of Health Services') "Standard

Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from

Indoor Sources Using Environmental Chambers."

C. Shop Drawings: Show fabrication of structural-steel components.

061000 - 2

1.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer, fabricator and testing agency.

B. Welding certificates.

C. Mill test reports for structural steel, including chemical and physical properties.

D. Source quality-control reports.

E. Field quality-control and special inspection reports.

1.6 QUALITY ASSURANCE

A. Fabricator Qualifications: A qualified fabricator that participates in the AISC Quality

Certification Program and is designated an AISC-Certified Plant, Category STD, or is accredited by the IAS Fabricator Inspection Program for Structural Steel (AC 172).

B. Installer Qualifications: A qualified installer who participates in the AISC Quality Certification

Program and is designated an AISC-Certified Erector, Category CSE.

C. Welding Qualifications: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural Welding Code - Steel."

D. Comply with applicable provisions of the following specifications and documents:

1. AISC 303.

2. AISC 360.

3. RCSC's "Specification for Structural Joints Using ASTM A 325 or A 490 Bolts."

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Connections: Provide details of simple shear connections required by the Contract Documents to be selected or completed by structural-steel fabricator to withstand loads indicated and comply with other information and restrictions indicated.

1. Select and complete connections using schematic details indicated and AISC 360.

2. Use Allowable Stress Design; data are given at service-load level.

B. Moment Connections: as indicated in Structural Drawings.

C. Construction: as indicated in Structural Drawings.

061000 - 3

2.2 STRUCTURAL-STEEL MATERIALS

A. Recycled Content of Steel Products: Postconsumer recycled content plus one-half of preconsumer recycled content not less than 25 percent.

B. W-Shapes: ASTM A 992/A 992M.

C. Channels, Angles, M, S-Shapes: ASTM A 36/A 36M.

D. Plate and Bar: ASTM A 36/A 36M.

E. Cold-Formed Hollow Structural Sections: ASTM A 500/A 500M, Grade B, structural tubing.

F. Steel Pipe: ASTM A 53/A 53M, Type E or Type S, Grade B.

G. Welding Electrodes: Comply with AWS requirements.

2.3 BOLTS, CONNECTORS, AND ANCHORS

A. High-Strength Bolts, Nuts, and Washers: ASTM A 325, Type 1, heavy-hex steel structural bolts; ASTM A 563, Grade C, heavy-hex carbon-steel nuts; and ASTM F 436, Type 1, hardened carbon-steel washers; all with plain finish.

1. Direct-Tension Indicators: ASTM F 959, Type 325, compressible-washer type with plain finish.

B. High-Strength Bolts, Nuts, and Washers: ASTM A 490, Type 1, heavy-hex steel structural bolts or tension-control, bolt-nut-washer assemblies with splined ends; ASTM A 563, Grade DH, heavy-hex carbon-steel nuts; and ASTM F 436, Type 1, hardened carbon-steel washers with plain finish.

1. Direct-Tension Indicators: ASTM F 959, Type 490, compressible-washer type with plain finish.

C. Zinc-Coated High-Strength Bolts, Nuts, and Washers: ASTM A 325, Type 1, heavy-hex steel structural bolts; ASTM A 563, Grade DH heavy-hex carbon-steel nuts; and ASTM F 436, Type 1, hardened carbon-steel washers.

1. Finish: Hot-dip or mechanically deposited zinc coating.

2. Direct-Tension Indicators: ASTM F 959, Type 325, compressible-washer type with finish as indicated.

D. Tension-Control, High-Strength Bolt-Nut-Washer Assemblies: ASTM F 1852, Type 1, heavy-hex head assemblies consisting of steel structural bolts with splined ends, heavy-hex carbon-steel nuts, and hardened carbon-steel washers.

1. Finish: as indicated.

E. Shear Connectors: ASTM A 108, Grades 1015 through 1020, headed-stud type, cold-finished carbon steel; AWS D1.1/D1.1M, Type B.

061000 - 4

F. Unheaded Anchor Rods: as indicated.

1. Configuration: as indicated.

2. Finish: as indicated.

G. Headed Anchor Rods: as indicated, straight.

1. Finish: as indicated.

H. Threaded Rods: ASTM A 36/A 36M.

1. Finish: as indicated.

I. Clevises and Turnbuckles: Made from cold-finished carbon steel bars, ASTM A 108, Grade 1035.

2.4 PRIMER

A. Low-Emitting Materials: Paints and coatings shall comply with the testing and product requirements of the California Department of Public Health's (formerly, the California

Department of Health Services') "Standard Method for the Testing and Evaluation of Volatile

Organic Chemical Emissions from Indoor Sources Using Environmental Chambers."

B. Primer: Comply with Section 099113 "Exterior Painting," Section 099123 "Interior Painting," and Section 099600 "High-Performance Coatings."

C. Primer: SSPC-Paint 25, as indicated, zinc oxide, alkyd, linseed oil primer.

D. Primer: Fabricator's standard lead- and chromate-free, nonasphaltic, rust-inhibiting primer complying with MPI#79 and compatible with topcoat.

2.5 GROUT

A. Metallic, Shrinkage-Resistant Grout: ASTM C 1107/C 1107M, factory-packaged, metallic aggregate grout, mixed with water to consistency suitable for application and a 30-minute working time.

B. Nonmetallic, Shrinkage-Resistant Grout: ASTM C 1107/C 1107M, factory-packaged, nonmetallic aggregate grout, noncorrosive and nonstaining, mixed with water to consistency suitable for application and a 30-minute working time.

2.6 FABRICATION

A. Structural Steel: Fabricate and assemble in shop to greatest extent possible. Fabricate according to AISC 303, "Code of Standard Practice for Steel Buildings and Bridges," and to AISC 360.

B. Shear Connectors: Prepare steel surfaces as recommended by manufacturer of shear connectors.

Use automatic end welding of headed-stud shear connectors according to AWS D1.1/D1.1M and manufacturer's written instructions.

061000 - 5

2.7 SHOP CONNECTIONS

A. High-Strength Bolts: Shop install high-strength bolts according to RCSC's "Specification for

Structural Joints Using ASTM A 325 or A 490 Bolts" for type of bolt and type of joint specified.

1. Joint Type: as indicated.

B. Weld Connections: Comply with AWS D1.1/D1.1M and AWS D1.8/D1.8M for tolerances, appearances, welding procedure specifications, weld quality, and methods used in correcting welding work.

2.8 SHOP PRIMING

A. Shop prime steel surfaces except the following:

1. Surfaces embedded in concrete or mortar. Extend priming of partially embedded members to a depth of 2 inches.

2. Surfaces to be field welded.

3. Surfaces of high-strength bolted, slip-critical connections.

4. Surfaces to receive sprayed fire-resistive materials (applied fireproofing).

5. Galvanized surfaces.

6. Surfaces enclosed in interior construction.

B. Surface Preparation: Clean surfaces to be painted. Remove loose rust and mill scale and spatter, slag, or flux deposits.