Addendum 1

ADDENDUM NO. 1

PROJECT: Lamar Reese Elementary School Sign Bid No. 23-FAC-005

OWNER: Dougherty County School System Facilities Services Department 1711 Schilling Avenue Albany, Georgia 31705

CONTACT: Tony Reese Phone: (229) 431-1301 Fax: (229) 431-1252 E-mail: treese@docoschools.org

DATE ISSUED: March 06, 2023

BID DATE: March 28, 2023 @ 1:30 PM EST

TOTAL # PAGES: Twenty-Eight (28)

The Bid Document, dated February 22, 2023, is hereby modified and/or interpreted as noted herein. Where possible, the changes to bid forms or documents required to be submitted with the bid have been identified by bold red text.

Acknowledge receipt of the addendum in the space provided on the Bid Form. Failure to do so may, at the Owner’s option, subject the bidder to disqualification.

CHANGES TO THE BID DOCUMENTS

1. Specifications – Section 10 4310, Page 10 4310-2, Part 2-Products, Paragraph F, 1 and 2, replace with the following;

1. Character text; Lamar Reese Elementary School. (font provided during submittal process)

2. Graphics; (graphic provided during submittal process)

2. Specifications – Add Section 02 4119 Selective Demolition; (see attached)

3. Specifications – Add Section 04 2000 Unit Masonry; (see attached)

Attachments

Section 02 4119 Selective Demolition Section 04 2000 Unit Masonry Electrical Sheet 1 and 2

End of Addendum No. 1

SELECTIVE DEMOLITION 02 4119 - 1

SECTION 02 4119

SELECTIVE DEMOLITION

PART 1 - GENERAL

1.01 DESCRIPTION OF WORK

A. Contractor shall demolish the existing damaged masonry sign and the existing back-lit marquee sign and base in its entirety. Electrical contractor shall coordinate with the demolition contractor to remove the existing electrical circuit. Circuit shall be terminated at pole light.

1.02 REFERENCED STANDARDS

A. The following standards shall be incorporated into the contract documents by reference:

1. American National Standards Institute (ANSI); ANSI A10.6; 1983, Demolition

Operations - Safety Requirements.

2. Code of Federal Regulations (CFR); 40 CFR 61-SUBPART M; National Emission

Standard for Asbestos.

1.03 SUBMITTALS

A. Schedule: Submit schedule indicating proposed methods and sequence of operations for selective demolition work to Owner's Representative for review prior to commencement of work.

1. Include coordination for shut-off, capping, and continuation of utility services required, together with details for dust and noise control protection.

2. Existing plumbing, mechanical and electrical systems shall remain in operation until such time as new systems are placed into service and functioning properly.

1.04 JOB CONDITIONS

A. Occupancy:

1. Conduct selective demolition work in manner to minimize need for disruption of Owner's normal operations.

2. Provide min. of 24 hours’ advance notice to Owner of demolition activities impacting

Owner's normal operations.

B. Condition of Structures:

1. Owner assumes no responsibility for actual condition of items or structures to be demolished.

2. Conditions existing at time of commencement of contract maintained by Owner insofar as practicable.

C. Partial Demolition and Removal:

1. Remove items indicated to be removed, but of salvable value to Contractor, from structure as work progresses.

2. Transport salvaged items from site when removed.

3. Storage or sale of removed items on site not permitted.

D. Protections:

SELECTIVE DEMOLITION 02 4119 - 2

1. Provide temporary barricades and other forms of protection as required to protect Owner's personnel and general public from injury due to selective demolition work.

2. Provide protective measures required to provide free and safe passage of Owner's personnel and general public to and from occupied portions of building.

3. Remove protections at completion of work.

E. Damages: Promptly repair damages caused to adjacent facilities by demolition work at no cost to Owner.

1. Repair adjacent surfaces and materials with materials to match existing in composition, thickness, finish and appearance.

F. Traffic:

1. Conduct selective demolition operations and debris removal in manner to ensure min.

interference with roads, streets, walks, and other adjacent occupied or used facilities.

2. Provide alternate routes around closed or obstructed traffic ways if required by governing regulations.

G. Utility Services:

1. Do not interrupt existing utilities serving occupied or used facilities, except when authorized in writing by authorities having jurisdiction.

H.

Environmental Controls:

1. Comply with governing regulations pertaining to environmental protection.

PART 2 - PRODUCTS

2.01 Materials:

A. Materials utilized to repair and/or patch areas as a result of minor demolition shall match existing materials and conform to requirements of applicable sections of specification.

PART 3 - EXECUTION

3.01 SCOPE OF WORK

A. It is the intent of the contract documents to require that the contractor provide demolition activities necessary and required for the performance of the work specified whether such demolition is specifically indicated or not.

1. Demolish school signs, foundations, and electrical as shown.

2. Notes regarding demolition of existing work are included in specifications and on drawings.

3. These notes are intended to provide a general scope of the demolition work required.

However, such notes shall not be considered as all inclusive. The contractor shall remove existing construction (materials, finishes and equipment) as required for the installation of the new construction.

3.02 DIMENSIONS:

SELECTIVE DEMOLITION 02 4119 - 3

A. Existing Dimensions and Conditions: Dimensions indicated on drawings relative to existing conditions are approximate. Contractor shall verify dimensions which affect bid price prior to bidding.

B. No changes to the contract amount shall be considered if the change is the result of not verifying dimensions.

C. The drawings indicate the approximate existing conditions. Contractor to field verify all visible conditions prior to bidding. Notify the Design Professional of any discrepancies between drawings and existing conditions prior to receipt of bids.

3.03 GENERAL WORK

A. Burn, store or sell no material either in building or on site.

1. All removed material and debris, unless identified otherwise, is Contractor's property;

Contractor remove immediately and completely from site.

B. Where removal of entire walls or floors required, percussion-type methods permitted; where removal of portions of existing walls or floors required or new openings required in existing walls or floors, perform by saw cutting in order to prevent damage to remaining construction.

C. Perform demolition or removal work required to accomplish work of Contract Documents, whether specifically noted or not, with care not to damage existing construction remaining.

D. Repair and refinish damages to existing construction to match existing using materials and methods of construction consistent with existing conditions.

3.04 INSPECTION

A. Prior to commencement of selective demolition work, inspect areas in which work performed.

1. Photograph existing conditions to structure surfaces, equipment or to surrounding properties which could be misconstrued as damage resulting from selective demolition work.

2. File photographs with Owner's Representative prior to starting work.

B. Contractor take photographs throughout interior and exterior of area to document existing conditions prior to starting of construction; keep photographs on file at jobsite.

1. This requirement included to protect Contractor's interest, and filing of such list will preclude possibility of damages being assigned Contractor for repairs.

2. Contractor does not have responsibility of repairing any damages not result of his own negligence.

C. When Contractor moves on site and starts construction, it is to be construed as his complete acceptance of existing site conditions.

3.05 PREPARATION

A. Cover and protect equipment and fixtures to remain from soiling or damage when demolition work performed in rooms or areas from which such items not removed.

3.06 DEMOLITION AND PATCHING

A. Perform all demolition and patching required to accomplish the work called for under this contract.

SELECTIVE DEMOLITION 02 4119 - 4

B. All material shown to be removed, unless noted otherwise, shall become the property of the contractor and shall be removed from the site and disposed of in a legal manner.

C. Repair and patch all damaged materials (finishes, systems, etc.) resulting from work performed under this contract. The "patched" work shall match the adjacent surrounding materials.

D. Perform selective demolition work in systematic manner.

1. Use such methods required to complete work indicated on Drawings in accordance with demolition schedule and governing regulations.

2. Demolish concrete and masonry in small sections.

3. Cut concrete and masonry at junctures with construction to remain using power-driven masonry saw or hand tools; do not use power-driven impact tools.

4. Provide services for effective air and water pollution controls as required by local authorities having jurisdiction.

E. Removal of Concrete Block Walls:

1. Where existing masonry walls indicated to be removed and wall extends below finished floor slab the contractor shall remove existing masonry wall to a point not less than 8" below finished floor slab. Fill gap between floor slabs with minimum of 8" thick concrete.

Level floor slabs to within 1/8" in 10'-0". Where necessary provide additional leveling/grinding necessary to provide smooth transition between adjacent floor levels.

2. Masonry; Concrete Block and Brick:

a. New face brick and mortar to match existing in size, color, bond, joint type and overall appearance.

b. New concrete block to match existing in type of coursing.

3.07 ELECTRICAL WORK

A. Disconnect all power and illumination necessary for completion of removal operations.

1. Abandon services not extended or re-used.

B. If unanticipated mechanical, electrical or structural elements which conflict with intended function or design encountered, investigate and measure both nature and extent of conflict.

1. Submit report to Owner's Representative in written, accurate detail.

2. Pending receipt of directive from Owner's Representative rearrange selective demolition schedule as necessary to continue overall job progress without delay.

C. Electrical Systems:

1. Where new electrical system indicated to be installed contractor to remove existing abandoned system completely.

2. All new electrical conduit to be run concealed in existing and/or new construction unless otherwise noted or directed by the Design Professional.

3.08 SALVAGE MATERIALS

A. Salvage Items: Where indicated on Drawings as "Owner Salvage," carefully remove indicated items, clean, store and turn over to Owner and obtain receipt.

1. Historic artifacts, including cornerstones and their contents, commemorative plaques and tablets, antiques, and other articles of historic significance remain property of Owner.

2. Notify Owner's Representative if such items encountered and obtain acceptance regarding method of removal and salvage for Owner.

SELECTIVE DEMOLITION 02 4119 - 5

B. Throughout the existing building there are existing items not scheduled for re-use which the owner wishes to salvage. The contractor shall remove, in good condition, all items listed below. The owner will view potential salvage materials and determine which of the materials removed will be retained by owner.

1. Materials retained by owner shall be stored in area on site designated by owner. The owner will remove material from site.

2. Materials not selected by owner for salvage shall be disposed of by the contractor in a legal fashion. Contractor to pay all disposal costs.

C. The contractor shall remove the following materials in good conditions and allow the owner to inspect to determine whether the owners wishes to salvage:

1. Architectural:

a. Doors and Hardware (excluding frames)

b. Windows (excluding frames)

c. Tack Strips.

d. Base and overhead Cabinets.

2. Mechanical:

a. Items identified on engineering drawings.

3. Electrical System:

a. Items identified on engineering drawings.

D. All items scheduled for removal not specifically listed above (or elsewhere) to be salvaged shall become the property of the contractor and shall be disposed of off site by contractor.

3.09 DISPOSAL OF DEMOLISHED MATERIALS

A. Remove debris, rubbish and other materials resulting from demolition operations from building site.

1. Transport and legally dispose of materials off site.

2. If hazardous materials encountered during demolition operations, comply with applicable regulations, laws, and ordinances concerning removal, handling and protection against exposure or environmental pollution.

3. Burning of removed materials not permitted on project site.

3.10 CLEAN-UP AND REPAIR

A. Upon completion of demolition work, remove tools, equipment and demolished materials from site.

B. Repair demolition performed in excess of that required.

1. Repair adjacent construction or surfaces soiled or damaged by selective demolition work.

END OF SECTION 02 4119

Unit Masonry 04 2000 - 1

SECTION 04 2000

UNIT MASONRY

PART 1 - GENERAL

1.01 RELATED DOCUMENTS

A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification sections, apply to work of this Section.

B. Requirements of this section apply to masonry work specified in Division-4 section "Reinforced Unit Masonry".

1.02 DESCRIPTION OF WORK

A. Extent of each type of masonry work indicated on drawings.

B. Types of masonry work required include:

1. Concrete unit masonry

2. Prefaced concrete masonry units, (split face, ground and polished faced)

3. Decorative concrete masonry units.

4. Brick masonry

5. Reinforcing steel.

6. Masonry joint reinforcement.

7. Ties and anchors.

1.03 QUALITY ASSURANCE

A. General: Where codes, standards or regulations referenced in this section, compliance with such codes, standards or regulations shall be considered the minimum applicable standards. Where requirements of this sections exceed the requirements of the referenced standard the requirements of this section shall govern.

1. Where reference is made to ASTM standards, such reference shall exclude reference to provisions related finish of concrete masonry units.

B. Codes and Standards: Comply with provisions of following, except as otherwise indicated herein:

1. National Concrete Masonry Association (NCMA): 'Specifications for Design and Construction of Load Bearing Concrete Masonry' latest edition.

2. American Concrete Institute (ACI): ACI 530.1 'Specifications for Masonry Structures' and ACI

531' Building Code Requirements for Masonry Structures'

C. Single Source Responsibility for Masonry Units: Obtain exposed masonry units of uniform texture and color, or a uniform blend within the ranges accepted for these characteristics, from ONE manufacturer for each different product required for each continuous surface or visually related surfaces.

Unit Masonry 04 2000 - 2

D. Single Source Responsibility for Mortar Materials: Obtain mortar ingredients of uniform quality, including color for exposed masonry, from one manufacturer for each cementitious component and from one source and producer for each aggregate.

1.04 SUBMITTALS

A. Product Data: Submit manufacturer's product data for each type of masonry unit, accessory, and other manufactured products, including certifications that each type complies with specified requirements.

1. Submit complete product data, including engineering calculations, for each condition where pre-cast concrete lintels are to be used.

B. Shop Drawings: Show fabrication and installation details for the following:

1. Reinforcing Steel: Detail bending and placement of unit masonry reinforcing bars.

2. Fabricated Flashing: Detail corner units, end-dam units, and other special applications.

C. Samples for Initial Selection Purposes: Submit samples of following materials:

1. Unit masonry samples in small scale form showing full extent of colors and textures available for each type of exposed masonry unit required.

2. Colored masonry mortar samples showing full extent of colors available.

D. Samples for Verification Purposes: Submit the following samples:

1. Unit masonry samples for each type of exposed masonry unit required; include in each set full range of exposed color and texture expected in completed work.

a. Include size variation data verifying that actual range of sizes for brick falls within ASTM

C 216 dimension tolerances for brick where modular dimensioning indicated.

b. Concrete masonry samples shall include samples of each block type and size utilized.

Block types to include: stretcher, bull nose, double bull nose, lintel, spandrel, non-fire rated, and fire rated units.

2. Colored masonry mortar samples for each color required showing full range of color expected in finished work.

a.Label samples to indicate type and amount of colorant used.

E. Material Test Reports: From a qualified testing agency indicating and interpreting test results of the following for compliance with requirements indicated:

1. Each type of masonry unit required.

a. Include size-variation data for brick, verifying that actual range of sizes falls within specified tolerances.

b. Include test results, measurements, and calculations establishing net-area compressive strength of masonry units.

2. Mortar complying with property requirements of ASTM C 270 & BIA M1.

3. Grout mixes complying with compressive strength requirements of ASTM C 476 Include description of type and proportions of grout ingredients.

1.05 DELIVERY, STORAGE, AND HANDLING

Unit Masonry 04 2000 - 3

A. Deliver masonry materials to project in undamaged condition.

B. Store and handle masonry units to prevent deterioration or damage due to moisture, temperature changes, contaminants, corrosion or other causes.

C. Store cementitious materials off ground, under cover and in dry location.

D. Store aggregates where grading and other required characteristics can be maintained.

E. Store masonry accessories including metal items to prevent deterioration by corrosion and accumulation of dirt.

1.06 PROJECT CONDITIONS

A. Protection of Work:

1. During erection, cover top of walls with heavy waterproof sheeting at end of each day's work.

2. Cover partially completed structures when work not in progress.

a. Extend cover min. of 24" down both sides and hold cover securely in place.

3. Staining: Prevent grout or mortar or soil from staining face of masonry to be exposed or painted.

4. Remove immediately grout or mortar in contact with masonry to be exposed or painted.

5. Protect base of walls from rain-splashed mud and mortar splatter by means of coverings spread on ground and over wall surface.

a. Extend covering up face of wall a minimum of 3'-0".

b. Do not place covering in mortar joint for anchorage.

c. Maintain protective covering for duration of project.

6. Protect adjoining finished materials and products from staining or disfigurement resulting from exposure to mortar, cement, lime or acid.

B. Cold Weather Protection:

1. Do not lay masonry units which are wet or frozen.

2. Remove any ice or snow formed on masonry bed by carefully applying heat until top surface dry to touch.

3. Remove masonry damaged by freezing conditions.

4. Do not lay masonry when air temperature below 40oF on falling thermometer, or when probable that temperatures below 40oF will be encountered before mortar set, unless adequate means provided for protecting work from freezing.

5. For clay masonry units with initial rates of absorption (suction) which require them to be wetted before laying, comply with following requirements.

a. For units with surface temperatures above 32oF (O.C.), wet with water heated to above

70oF (21oC).

b. For units with surface temperatures below 32oF (O.C.), wet with water heated to above

130oF (54oC).

6. Perform following construction procedures while work progressing.

a. Temperature ranges indicated below apply to air temperatures existing at time of installation except for grout.

b. For grout, temperature ranges apply to anticipated min. night temperatures.

Unit Masonry 04 2000 - 4

c. In heating mortar and grout materials, maintain mixing temperature selected within 10oF (6oC).

(1) 40oF (4oC) to 32oF (0oC):

(a) Mortar: Heat mixing water to produce mortar temperature between 40oF (4oC) and 120oF (49oC).

(b) Grout: Follow normal masonry procedures.

(2) 32oF (0oC) to 25oF (-4oC):

(a) Mortar: Heat mixing water and sand to produce mortar temperatures between 40oF (4oC) and 120oF (49oC); maintain temperature of mortar on boards above freezing.

(b) Grout: Heat grout materials to 90oF (32oC) to produce in place grout temperature of 70oF (21oC) at end of work day.

(3) 25oF (-4oC) to 20oF (-7oC):

(a) Mortar: Heat mixing water and sand to produce mortar temperatures between

40oF (4oC) and 120oF (49oC); maintain temperature of mortar on boards above freezing.

(b) Grout: Heat grout materials to 90oF (32oC) to produce in place grout temperature of 70oF (21oC) at end of work day.

(c) Heat both sides of walls under construction using salamanders or other heat sources. (d) Use windbreaks or enclosures when wind is in excess of 15 mph.

(4) 20oF (-7oC) and below:

(a) Mortar: Heat mixing water and sand to produce mortar temperatures between

40oF (4oC) and 120oF (49oC).

(5) Grout: Heat grout materials to 90oF (32oC) to produce in place grout temperature of

70oF (21oC) at end of work day.

(a) Masonry Units: Heat masonry units so that they are above 20oF (-7oC) at time of laying.

(b) Provide enclosure and auxiliary heat to maintain an air temperature of at least

40oF (4oC) for 24 hours after laying units.

d. Do not heat water for mortar and grout to above 160oF (71oC).

7. Protect completed masonry and masonry not being worked on in following manner.

a. Temperature ranges indicated apply to mean daily air temperatures except for grouted masonry.

b. For grouted masonry temperature ranges apply to anticipated minimum night temperatures.

(1) 40oF (4oC) to 32oF (0oC): Protect masonry from rain or snow min. 24 hours by covering with weather-resistive membrane.

(2) 25oF (-4oC) to 20oF (-7oC): Completely cover masonry with weather-resistive insulating blankets or similar protection for min. 24 hours, 48 hours for grouted masonry.

(3) 20oF (-7oC) and below:

(a) Except as otherwise indicated, maintain masonry temperature above 32oF (0oC) for 24 hours using enclosures and supplementary heat, electric heating blankets, infrared lamps or other methods proven to be satisfactory.

(b) For grouted masonry maintain heated enclosure to 40oF (4oC) for 48 hours.

Unit Masonry 04 2000 - 5

C. Hot-Weather Requirements: Protect unit masonry work when temperature and humidity conditions produce excessive evaporation of water from mortar and grout. Provide artificial shade and wind breaks and use cooled materials as required.

PART 2 - PRODUCTS

2.01 BRICK

A. General: Comply with referenced standards and other requirements indicated below applicable to each form of brick required.

1. Brick shall be uniform in appearance and free from chipped, broken, crazed or otherwise damaged units.

B. General: Comply with referenced standards, other requirements indicated, applicable to each type brick. Provide shapes indicated and as follows:

1. Provide special shapes for lintels, corners, jambs, sash, control joints, headers, bonding, and other special conditions.

2. Provide square-edged units for outside corners, unless indicated as bullnose.

C. Size: Provide bricks manufactured to following actual dimensions:

1. Standard Modular: 2-1/4" x 3-5/8" x 7-5/8".

2. Face Brick shall be uniform in size.

a. Maximum variation in length of brick shall not exceed 1/16".

D. Provide special molded shapes where indicated and for application requiring brick of form, size and finish on exposed surfaces which cannot be produced from standard brick sizes by sawing.

1. At arched windows provide pre-shaped brick of dimensions suitable for arch and as necessary to avoid field cutting of brick while maintaining proper alignment of edge of brick with radius point.

E. For sills, caps, soldiers, pierced screen walls, and similar applications resulting in exposure of brick surfaces which otherwise would be concealed from view, provide uncored or unfrogged units with all exposed surfaces finished.

F. Facing Brick: ASTM C 216 as follows:

1. Grade SW; Type FBS (normal size and color variations).

2. Compressive Strength: 8,000 psi, average, per ASTM C 67.

3. Application: Use where brick exposed, unless otherwise indicated.

4. Texture and Color: Primrose Modular by Cherokee: provide face brick of matching color, texture and size as existing adjacent brickwork.

G. Building Common Brick: ASTM C 62, and as follows:

1. Grade SW.

2. Application: Use where brick indicated for concealed locations.

Unit Masonry 04 2000 - 6

2.02 CONCRETE MASONRY UNITS

A. General: Comply with referenced standards and other requirements indicated below applicable to each form of concrete masonry unit required.

1. Concrete Masonry units shall be free of surface and edge imperfections, irregularities, chippage, and other defects.

2. Edges of block shall be smooth, straight and square and free from irregularities.

3. Face texture of block shall be dense, smooth and regular in appearance. Course or irregular textured block unacceptable.

4. The face texture of each specialty unit (lintels, bull nose, solid, half size units, etc.) shall match the face texture of the stretcher blocks.

B. Provide special shapes where required for lintels, corners, jambs, sash, control joints, headers, bonding and other special conditions.

1. Face texture of specialty blocks to match stretcher blocks.

C. Concrete Masonry Units (CMU): Provide units complying with characteristics indicated below for Grade, Type, face size, exposed face and, under each form included, for weight classification.

1. Grade N; Type II Non-moisture controlled units.

2. Size: Nominal face dimensions of 16" long x 8" high (15-5/8" x 7-5/8" actual) x thicknesses indicated.

3. Exposed Faces: Provide the following as indicated on drawings:

a. Primary Block: Manufacturer's standard gray color and smooth uniform face texture, if not otherwise indicated. Face of block to be free of cracks, chips and other imperfections.

5. Hollow Loadbearing Block: ASTM C 90 and as follows:

a. Weight Classification: Lightweight.

6. Solid Loadbearing Block: ASTM C 145 and as follows:

a. Weight Classification: Lightweight.

7. Concrete Building Brick: Provide units complying with ASTM C 55 and characteristics indicated below for grade, type, size, and weight classification.

a. Grade: Same as indicated for concrete block.

b. Type: Same as indicated for concrete block.

c. Size: As indicated.

d. Size: Non-Modular Standard: 2-1/4" x 3-3/4" x 8"; unless noted otherwise.

e. Weight Classification: Lightweight.

D. Split Face Concrete Masonry Units: Provide units complying with characteristics indicated below for Grade, Type, face size, exposed face and, under each form included, for weight classification.

1. Color: Newport Buff by Scruggs Concrete

2. Shapes and Sizes: As indicated on the drawings.

3. Sustainable Design: Manufactured with recycled content, percentage as standard by manufacturer.

4. Size: Nominal face dimensions of 16" long x 8" high (15-5/8" x 7-5/8" actual) x thicknesses indicated.

5. Hollow Loadbearing Block: ASTM C 90 and as follows:

Unit Masonry 04 2000 - 7

7. Concrete Building Brick: Provide units complying with ASTM C 55 and characteristics indicated below for grade, type, size, and weight classification.

f. Grade: Same as indicated for concrete block.

g. Type: Same as indicated for concrete block.

h. Size: As indicated.

i. Size: Non-Modular Standard: 2-1/4" x 3-3/4" x 8"; unless noted otherwise.

j. Weight Classification: Lightweight.

2.03 MORTAR AND GROUT MATERIALS

A. Masonry Cement: ASTM C 91.

1. For colored aggregate mortars use masonry cement of natural color or white as required to produce mortar color indicated.

2. Color; Sahara by Argos.

3. Type; N, S, M

B. Hydrated Lime: ASTM C 207, Type S.

C. Aggregates for Mortar: ASTM C 144, except for joints less than 1/4" use aggregate graded with 100% passing No. 16 sieve.

1. White Mortar Aggregates: Natural white sand or ground white stone.

2. Colored Mortar Aggregates: Ground marble, granite or other sound stone, as required to match

Architect's sample.

D. Aggregate for Grout: ASTM C 404, Size No. 2.

E. Colored Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use in mortar mixes.

1. Use only pigments with record of satisfactory performance in masonry mortars.

2. Color Range:

a. Brick Masonry: Gray, white or buff range.

b. Integrally Colored Concrete Masonry: Match masonry.

c. Natural (gray) Masonry: No mortar pigment required.

3. Products: Subject to compliance with technical provisions, provide one of the following:

a. "Magnolia", Blue Circle Inc.

b. "SGS Mortar Colors"; Solomon Grind-Chem Service Inc.

c. "True Tone Mortar Colors"; Davis Colors; A subsidiary of Rockwood Industries, Inc.

F. Powdered Waterproofing for Mortar: Powder waterproofing shall be a dry mixture of stearates, water-reducing agents, and processed dry aggregates that coat the internal pores and channels of cementitious mixes with a water repellent compound and impart a reduced capillary action, thereby minimizing the entrance and transmission of water without decreasing strength.

1. Approved Manufacturer, subject to conformance with specification:

a. Sonneborn, Hydrocide Powder.

b. Addiment Incorporated

c. Krete Industries, Inc.

Unit Masonry 04 2000 - 8

d. Water: Clean, and potable.

2.04 JOINT REINFORCEMENT, TIES AND ANCHORING DEVICES

A. Materials: Comply with requirements indicated below for basic materials and with requirements indicated under each form of joint reinforcement, tie and anchor for size and other characteristics:

1. Mill Galvanized Steel Wire: ASTM A 82 for uncoated wire and with ASTM A 641 for zinc coating of class indicated below:

a. 0.10 oz. per sq. ft. of wire surface.

b. Application: Use for masonry not exposed to exterior or earth.

2. Hot-Dip Galvanized Steel Wire: ASTM A 82 for uncoated wire and with ASTM A 153, Class B-2 (1.5 oz. per sq. ft. of wire surface) for zinc coating applied after prefabrication into units.

a. Application: Use for masonry exposed to exterior and in contact with earth.

3. Austenitic Stainless Steel Wire: ASTM A 580, AISI Type 304 (UNS S30400) alloy.

a. Application: Use where indicated.

4. Zinc-Coated (Galvanized) Steel Sheet: Carbon steel with zinc coating complying with ASTM A 525, Coating Designation G90.

a.Application: Use for dovetail slots and where indicated.

5. Hot-Dip Galvanized Carbon Steel Sheet: ASTM A 366, Class 2 or ASTM A 635; hot dip galvanized after fabrication to comply with ASTM A 153; Class B. a. Application: Use for anchors.

B. Joint Reinforcement: Provide welded-wire units prefabricated with deformed continuous side rods and plain cross rods into straight lengths of not less than 10', with prefabricated corner and tee units, and complying with requirements indicated below:

1. Width: Fabricate joint reinforcement in units with widths of approximately 2" less than nominal width of walls and partitions as required to provide mortar coverage of not less than 5/8" on joint faces exposed to exterior and 1/2" elsewhere.

2. Wire Size for Side Rods: 9 ga. (0.1483") diameter.

3. Wire Size for Cross Rods: 9 ga. (0.1483") diameter.

4. For single-wythe masonry provide type as follows with single pair of side rods:

a. Truss design with diagonal cross rods spaced max. 16" o.c. Provide products of one of following:

1) AA Wire Products Co.; AA600 "Blok-Truss".

2) Dur-O-Wall, Inc.; "Truss" Single Wythe.

3) Hohmann & Barnard, Inc.; #120 "Truss-Mesh".

4) Masonry Reinforcing Corporation of America; Series 300, 2 wire single wythe truss type.

5) National Wire Products Industries; single wythe truss type.

6) Southern Construction Products, Inc.; single wythe truss type.

5. For multi-wythe masonry provide type as follows:

a. Truss design with diagonal cross rods spaced not more than 16" o.c..

1) Brick with Concrete Masonry Back-up (no cavity): One side rod for each face shell of concrete masonry backup and one rod for brick wythe. Provide products of one of following:

Unit Masonry 04 2000 - 9

a) AA Wire Products Co.; AA610 "Tri-Lok".

b) Dur-O-Wall, Inc.; "Composite Truss Trirod"

c) Hohmann & Barnard, Inc.;#130 "Truss-Tri-Mesh"

d) Masonry Reinforcing Corporation of America; Series 300, 3-wire composite truss type.

e) National Wire Products Industries; 3-wire composite truss type.

f) Southern Construction Products, Inc.; truss 3-wire style.

2) Brick with Concrete Masonry Back-up (uninsulated cavity): One side rod for each face shell of concrete masonry backup and one rod for brick wythe with crimped moisture drip in cross rods at center of cavity. Provide products of one of following:

a) AA Wire Products Co.; AA610 "Tri-Lok" with moisture drip.

b) Dur-O-Wall, Inc.; "Cavity Truss Trirod"

c) Hohmann & Barnard, Inc.;#135 "Cavity Truss-Tri-Mesh"

d) Masonry Reinforcing Corporation of America; Series 300, 3-wire cavity truss type with moisture drip.

e) National Wire Products Industries; 3-wire cavity truss type with moisture drip.

f) Southern Construction Products, Inc.; truss 3-wire style with moisture drip.

3) Brick with Concrete Masonry Back-up (insulated cavity): One side rod for each face shell of concrete masonry backup and adjustable pintel/eye type or winged loop/box type tie 16" o.c. extending into brick wythe. Provide products of one of following:

a) AA Wire Products Co.; AA625 "Econo-Eye-Blok-Truss" or AA675 "Econo-

Cavity Blok- Truss III"

b) Dur-O-Wall, Inc.; "Dur-O-Eye"

c) Hohmann & Barnard, Inc.; #170 "Adjustable Eye-Wire" or #AF- "Ajustoflex

Truss".

d) Masonry Reinforcing Corporation of America; Series 900, cavity hook and eye.

e) National Wire Products Industries; double hook and eye truss or truss adjustable tab tie.

f) Southern Construction Products, Inc.; "double-eye" truss - rectangular type.

4) Two Wythe Concrete Masonry: One side rod for each face shell of concrete masonry back-up and of concrete masonry facing wythe. Provide products of one of following:

a) AA Wire Products Co.; AA630 4-wire "Blok-Truss"

b) Dur-O-Wall, Inc.; "Truss - Double"

c) Hohmann & Barnard, Inc.;#140 "Truss-Twin-Mesh"

d) Masonry Reinforcing Corporation of America; Series 300, 4-wire composite truss type.

e) National Wire Products Industries; truss double side rod.

f) Southern Construction Products, Inc.; truss 4-wire style.

5) Two Wythe Brick: Two side wire truss design with diagonal cross rods spaced max.

16" o.c.. Provide products of one of following:

a) AA Wire Products Co.; AA600 "Blok-Truss".

b) Dur-O-Wall, Inc.; "Truss" Single Wythe.

c) Hohmann & Barnard, Inc.; #120 "Truss-Mesh".

Unit Masonry 04 2000 - 10

d) Masonry Reinforcing Corporation of America; Series 300, 2 wire single wythe truss type.

e) National Wire Products Industries; single wythe truss type.

f) Southern Construction Products, Inc.; single wythe truss type.

C. Bent-Wire Ties: Where indicated only provide individual prefabricated bent-wire units complying with requirements indicated below:

1. Wire Size: 0.1875" diameter.

2. Length: Provide units of length indicated but not less than required for embedment into each wythe of 1.5" for solid units and for embedment of tie end into face shells of hollow units, with min. 5/8" mortar cover on exterior face joints, 1/2" elsewhere.

a.Ties to be of a width approximately 2" less than overall wall thickness.

3. Tie Shape for Hollow Masonry Units Laid with Cells Vertical: Rectangular with ends welded close and not less than 4" wide. Provide products of one of following:

a. AA Wire Products Co.; AA304.

b. Dur-O-Wall, Inc.; D/A 510.

c. Hohmann & Barnard, Inc.; #BWT

d. Masonry Reinforcing Corporation of America; 1501.

e. National Wire Products Industries; Series 650.

f. Southern Construction Products, Inc.; Series 500 box tie (without drip).

4. Tie Shape for Solid Masonry Unit Construction: Z-shaped ties with ends bent 90o to provide hooks min. 2" long. Provide products of one of following:

a. AA Wire Products Co.; AA309.

b. Dur-O-Wall, Inc.; D/A 500.

c. Hohmann & Barnard, Inc.; #ZWT

d. Masonry Reinforcing Corporation of America; 1600.

e. Southern Construction Products, Inc.; Series 500 zee tie (without drip).

5. Type for masonry where coursing between wythes do not align: Adjustable ties composed of two parts, one with pintle, and the other with an eye. Provide products of one of following:

a. AA Wire Products Co.; AA303.

b. Dur-O-Wall, Inc.; D/A 515.

c. Hohmann & Barnard, Inc.; 750.

d. Masonry Reinforcing Corporation of America; 1801.

e. National Wire Products Industries; Series 915.

f. Southern Construction Products, Inc.; pintle and eye adjustable wall tie.

D. Flexible Anchors: Where flexible anchors are indicated for connecting masonry to structural framework, provide 2-piece anchors as described below which permit vertical or horizontal differential movement between wall and framework parallel to, but resist tension and compression forces perpendicular to, plane or wall.

1. For anchorage to concrete framework, provide manufacturer's standard anchors with dovetail anchor section formed form 0.1046" (12 gage) thick sheet metal and triangular-shaped wire tie section sized to extend within 1" of masonry face.

a. Wire Size: 0.1875" diameter.

b. Provide products of one of following:

Unit Masonry 04 2000 - 11

1) AA Wire Products Co.; AA100 + AA200 or AA200V as applicable.

2) Dur-O-Wall, Inc.; D/A 100 + D/A 720 or D/A 723 as applicable.

3) Hohmann & Barnard, Inc.; 305 + 315.

4) Masonry Reinforcing Corporation of America; 2102.

5) National Wire Products Industries; Series 500 + Series 506 or Series 506 as applicable.

6) Southern Construction Products, Inc.; 10802 + Series 700.

2. For anchorage to steel framework, provide manufacturer's standard anchors with welded anchor section formed from 0.1046" (12 gage) thick sheet metal and triangular-shaped wire tie section sized to extend within 1" of masonry face.

a. Wire Size: 0.1875" diameter.

b. Provide products of one of following:

1) AA Wire Products Co.; AA401B + AA400.

2) Dur-O-Wall, Inc.; D/A 207 + D/A 702.

3) Hohmann & Barnard, Inc.; 359F + #VWT.

4) Masonry Reinforcing Corporation of America; 1000 + 1100.

5) National Wire Products Industries; No. 102 + No. 650

6)Southern Construction Products, Inc.; 703 + Series 700.

3.Refer to structural drawings for rigid masonry ties at some structural steel members.

E. Masonry Veneer Anchors: Two-piece assemblies which permit vertical or horizontal differential movement between wall and framework parallel to, but resist tension and compression forces perpendicular to, plane of wall; consisting of wire tie section and metal anchor section for attachment over sheathing to metal studs and complying with the following requirements.

1. Wire Size: 0.1875" diameter.

2. Wire Tie Length: As required to extend within 1" of masonry veneer face.

3. Triangular Ties: Provide products of one of following:

a. AA Wire Products Co.; AA401S-1 tie + AA401S anchor.

b. Dur-O-Wall, Inc.; D/A 702 tie + D/A 213 anchor.

c. Hohmann & Barnard, Inc.; V-tie + DW-10 anchor.

d. Masonry Reinforcing Corporation of America; 1100 tie + 1001 anchor.

e. National Wire Products Industries; Series 200 tie + No. 125 anchor.

f. Southern Construction Products, Inc.; Series 700 tie + 710 anchor.

4. Metal Fasteners for Steel Studs: Steel drill screws, #10 diameter x length required to penetrate steel stud flange by not less than 3 exposed threads, complying with ASTM C 954 except with hex washer head and neoprene washer, cadmium-plated.

F. Lateral Wall Ties: Provide straps of form and length indicated, fabricated from sheet metal strips of following width and thickness, unless otherwise indicated.

1. Width: 1-1/2".

2. Thickness: 14-ga.

3. Size: 20" long with 2" vertical bend each end.

4. Configuration: "Z" shaped, corrugated.

5. Provide products of one of following:

a. AA Wire Products Co.; AA211Z

b. Dur-O-Wall, Inc.; D/A 301C.

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c. Masonry Reinforcing Corporation of America; 300Z.

d. National Wire Products Industries.

e. Southern Construction Products, Inc.

G. Corrugated Wall Ties: Provide straps of form and length indicated, fabricated from sheet metal strips of following width and thickness, unless otherwise indicated.

1. Width: 7/8".

2. Thickness: 22-ga.

3. Size: As required; penetrate brick 2"; turn up face of wall 2".

4. Provide products of one of following:

a. AA Wire Products Co.; AA211Z

b. Dur-O-Wall, Inc.; D/A 301C.

c. Masonry Reinforcing Corporation of America; 300Z.

d. National Wire Products Industries.

e. Southern Construction Products, Inc.

5. Metal Fasteners for Steel Studs: Steel drill screws, #10 diameter x length required to penetrate steel stud flange by not less than 3 exposed threads, complying with ASTM C 954 except with hex washer head and neoprene washer, cadmium-plated.

H. Anchor Bolts: Provide steel bolts with hex nuts and flat washers complying with ASTM A 307, Grade A, hot-dip galvanized to comply with ASTM C 153, Class C, in sizes and configurations indicated.

2.05 MISCELLANEOUS MASONRY ACCESSORIES

A. Reinforcing Bars: Deformed steel, ASTM A 615, Grade 60.

B. Non-Metallic Expansion Joint Strips: Premolded, flexible cellular neoprene rubber filler strips complying with ASTM D 1056, Grade RE41E1, capable of compression up to 35%, of width and thickness indicated.

C. Premolded Control Joint Strips: Material as indicated below, designed to fit standard sash block and to maintain lateral stability in masonry wall; size and configuration as indicated.

1. Polyvinyl chloride complying with ASTM D 2287, General Purpose Grade, Designation PVC-

63506 or Styrene-butadiene rubber compound complying with ASTM D 2000, Designation

2AA-805.

D. Bond Breaker Strips: Asphalt-saturated organic roofing felt complying with ASTM D 226, Type I (No. 15 asphalt felt).

2.06 MASONRY CLEANERS

A. Job-Mixed Detergent Solution: Solution of trisodium phosphate (1/2 cup dry measure) and laundry detergent (1/2 cup dry measure) dissolved in one gallon of water.

B. Acidic Cleaner: Manufacturer's standard strength general purpose cleaner designed for new masonry surfaces of type indicated; composed of blended organic and inorganic acids combined

Unit Masonry 04 2000 - 13 with special wetting systems and inhibitors; expressly approved for intended use by manufacturer of masonry units being cleaned.

1. Products: Subject to compliance with requirements, provide following:

a. "Sure Kleen" No. 600 Detergent; ProSoCo, Inc.

b. "DC-6 Brick Cleaner"; Acme Brick Co.

c. "Series 800"; Superior

d. "Brick Bath"; Goldblatt

e. "202" or "202V"; Diedrich

2.07 MORTAR AND GROUT MIXES

A. General: Do not add admixtures including coloring pigments, air-entraining agents, accelerators, retarders, water repellant agents, anti-freeze compounds or other admixtures, unless otherwise indicated.

1. Do not use calcium chloride in mortar or grout.

B. Scheduling: Mortar shall be placed in final location within 2-1/2 hours from time of initial mixing.

1. Re-tempering of mortar prohibit.

2. Mortar not in place within time period listed to be discarded.

C. Mixing:

1. Combine and thoroughly mix cementitious, water and aggregate in mechanical batch mixer;

comply with referenced ASTM standards for mixing time and water content.

2. Accurately measure all ingredients using appropriate measuring devices to assure proper proportions and to achieve uniform color, texture and quality.

3. Measuring by "shovel" not acceptable.

4. For masonry located in Exterior Walls, add one pound of powder waterproofing additive in each bag of masonry cement for mortar used in face veneer (brick, block, and stone).

Waterproofing additive is not required for ‘back-up’ block used where damproofing is applied to the cavity face of the block.

D. Mortar for Unit Masonry: Comply with ASTM C 270, Proportion Specifications, for types of mortar required, unless otherwise indicated.

1. Use Type N (750 PSI) mortar for above grade non-load bearing brick veneer, interior non-load bearing masonry and for other applications where another type not indicated.

2. Use Type S (1800 PSI) mortar for above grade interior and exterior load bearing (reinforced and nonreinforced) masonry and where indicated.

3. Use Type M (2500 PSI) mortar for masonry below grade and in contact with earth, and where indicated.

E. Colored Pigmented Mortar:

1. Select and proportion pigments with other ingredients to produce color required.

2. Do not exceed pigment-to-cement ratio of 1-to-10, by weight.

F. Grout for Unit Masonry: Use ready-mixed grout of strength and consistency indicated.

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PART 3 - EXECUTION

3.01 INSTALLATION, GENERAL

A. In addition to the requirements contained herein, masonry work shall comply with the Current Edition of the Brick Institute of America, Technical Notes, Section 7A and 7B and ACI 530.1 Current Edition.

1. Where conflicts exist between the requirements of this Section, the Technical Notes, and the requirements of ACI, the more stringent of the requirements shall govern.

B. Lay brick and block as described herein and as follows:

1. ‘Cull’ units which are damaged, chipped, cracked, or otherwise defective.

2. Broken, Chipped, Cracked, irregular or otherwise defective units shall not be utilized in construction of building. Such units placed in construction shall be removed and replaced without cost to the owner.

3. Do not lay units with irregular (rough) edges or non-uniform face texture. Where such units are placed in wall, contractor to remove and replace without additional cost.

C. Wetting Clay Brick:

1. Wet brick made from clay or shale which have ASTM C 67 initial rates of absorption (suction) of more than 30 grams per 30 sq. in. per minute.

2. Use wetting methods which ensure each clay masonry unit being nearly saturated but surface dry when laid.

D. Do not wet concrete masonry units.

E. Cleaning Reinforcing: Before placing, remove rust, scale, earth and other coatings from reinforcing.

F. Unless noted or detailed otherwise every three brick courses shall align with CMU coursing.

1. Should elevation of footing(s) require, cut first course of brick as necessary to ensure that the top of brick aligns with finished slab elevation.

2. Do NOT attempt to "level" top of footing using excess mortar or grout.

G. Thickness:

1. Build cavity and composite walls, floors and other masonry construction to full thickness shown.

2. Build single-wythe walls (if any) to the actual thickness of masonry units, using units of nominal thickness indicated.

H. Matching Existing Masonry Work:

1. Match coursing, bonding, color and texture of new masonry work with existing building.

3.02 CONSTRUCTION TOLERANCES

Unit Masonry 04 2000 - 15

A. Variation from Plumb:

1. For vertical lines and surfaces of columns, walls, and arises do not exceed +1/8" in any story height or 12' max.

2. For vertical alignment of head joints do not exceed +1/8" in any story height or in 12'-0".

B. Variation from Level:

1. For bed joints and lines of exposed lintels, sills, parapets, and other conspicuous lines do not exceed +1/8" in any bay or 20' max.

2. For top surface of bearing walls do not exceed +1/8" in 10' max. Or 1/16" within length and width of any single unit.

C. Variation of Linear Building Line: For position shown in plain and related portion of columns, walls and partitions, do not exceed 1/8" in any bay or 20' max.

D. Variation in Cross-Sectional Dimension: For columns and walls do not exceed +1/4".

E. Variation in Mortar Joint Thickness:

1. Unless otherwise indicated, make all bed and head joints 3/8", +1/16", with max. joint thickness of 1/2".

3.03 LAYING MASONRY WALLS

A. Layout walls in advance for accurate spacing of surface bond patterns with uniform joint widths and to accurately locate opening, movement-type joints, returns and offsets.

1.Avoid use of less-than-half-size units at corners, jambs and wherever possible at other locations.

B. Lay-up walls to comply with specified construction tolerances, with courses accurately spaced and coordinated with other work.

1. Accurately space courses.

2. Coordinate with other work.

C. Pattern Bond:

1. Lay exposed masonry in bond pattern as follows:

a. Brick: Running bond except as otherwise indicated.

b. Split-faced Concrete Masonry: Running bond.

2. Lay concealed masonry with all units in wythe in running bond or bonded by lapping not less than 2".

3. Bond and interlock each course of each wythe at corners.

4. Do not use units with less than nominal 4" horizontal face dimensions at corners or jambs.

5. At openings in walls (cased openings, doors and window) where stacked bond used, align edge of full block with each side of opening. Where necessary in order to maintain alignment, cut block to be centered above opening. Do not use cut block at jambs.

D. Stopping and Resuming Work:

1. Rack back 1/2-unit length in each course; do not tooth.

2. Clean exposed surfaces of set masonry, wet units lightly (if required) and remove loose masonry units and mortar prior to laying fresh mortar.

Unit Masonry 04 2000 - 16

E. Built-in Work:

1. Build in work of other sections indicated to be built-in with CMUs as work progresses; include anchors, wall plugs, expansions joints, control joints, and accessories. Space and properly align built-in parts; exercise care not to disturb other materials from position. a. Fill spaces around built-in items with fine grout.

b. Coat aluminum materials to prevent aluminum-cement chemical reaction or electrolytic action between aluminum and steel.

c. Where built-in items embedded in cores of hollow masonry units, place layer of metal lath in joint below and rod grout into core.

2. Fill around built-in items solidly with masonry.

3.04 MORTAR BEDDING AND JOINTS

A. A. Solid brick-size masonry units:

1. Completely fill bed and head joint

2. Butter ends fully with mortar to fill head joints, shove into place

3. Do not slush head joints

B. Hollow CMU: Provide full mortar coverage on horizontal and vertical face shells

1. Bed face shells and webs in full bed of mortar

2. Starting course on footings where cells not grouted: Spread full mortar bed including areas under cells

a. Max. setting bed on foundations of ¾ ".

b. If…