36C24922B0032 0001.docx

5. PROJECT NUMBER (if applicable)

CODE

7.

ADMINISTERED BY

2. AMENDMENT/MODIFICATION NUMBER

CODE

6. ISSUED BY

8. NAME AND ADDRESS OF CONTRACTOR

4. REQUISITION/PURCHASE REQ. NUMBER

3. EFFECTIVE DATE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED

PAGE OF

PAGES

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED

BPA NO.

1. CONTRACT ID CODE

FACILITY CODE

CODE

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

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

E. IMPORTANT:

is extended,

(a) By completing Items 8 and 15, and returning __________ copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE

OF YOUR

ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY is not extended.

12. ACCOUNTING AND APPROPRIATION DATA

(REV. 11/2016)

is required to sign this document and return ___________ copies to the issuing office.

is not, A. THIS CHANGE ORDER IS ISSUED PURSUANT TO:

Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. IN ITEM 10A.

15C. DATE SIGNED

B. THE ABOVE NUMBERE

D CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES

SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendmen t, and is received prior to the opening hour and date specified.

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

D. OTHER

Contractor

16C. DATE SIGNED

14. DESCRIPTION OF AMENDMENT/MODIFICATION

16B. UNITED

STATES OF AMERICA

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

15A. NAME AND TITLE OF SIGNER

16A. NAME AND TITLE OF

CONTRACTING OFFICER

15B. CONTRACTOR/OFFEROR

STANDARD FORM 30

PREVIOUS EDITION NOT USABLE

Prescribed by GSA - FAR (48 CFR) 53.243 (Type or print) (Type or print) (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

(Number, street, county, State and ZIP Code) (If other than Item 6) (Specify type of modification and authority) such as changes in paying office, appropriation date, etc.)

(If required)

(SEE ITEM 11)

(SEE ITEM 13)

(X)

CHECK

ONE

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

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

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF

SOLICITATIONS

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

(Signature of person authorized to sign) (Signature of Contracting Officer) 626-23-1-4209-0003 626-19-205 90C Department of Veterans Affairs Network Contracting Office 9 (90C)

NCO 9

1639 Medical Center Parkway, Suite 400 Murfreesboro TN 37129 90C Network Contracting Office 9 Department of Veterans Affairs Network Contracting Office (90C) 1639 Medical Center Parkway Suite 400 Murfreesboro TN 37129 To all Offerors/Bidders

36C24922B0032 10-26-2022

X x x

**HOUR &

DATE for Bids is NOT extended

626-3630162-4209-854200-3223 23NRNR000

X The purpose of this amendment is to provide Questions and Answers received during the RFI period.

Craig Ziegemeier Contracting Officer

1. Economic Price Adjustment for Labor and Material Due to the fact that this solicitation requires us to “hold” our pricing for 180 calendar days for acceptance and given the recent uncertainty in materials and labor costs; would the government consider including the FAR Clause 52.216-4, Economic Price Adjustment for Labor and Material in this solicitation?

52.216–4 Economic Price Adjustment— Labor and Material. As prescribed in 16.203–4(c), when contracting by negotiation, insert a clause that is substantially the same as the following clause in solicitations and contracts when the conditions specified in 16.203–4(c)(1)(i) through (iv) apply (but see 16.203–4(c)(2)). The clause may be modified by increasing the 10-percent limit on aggregate increases specified in subparagraph (c)(4), upon approval by the chief of the contracting office.

ECONOMIC PRICE ADJUSTMENT—LABOR AND MATERIAL (JAN 1997)

(a) The Contractor shall notify the Contracting Officer if, at any time during contract performance, the rates of pay for labor (including fringe benefits) or the unit prices for material shown in the Schedule either increase or decrease. The Contractor shall furnish this notice within 60 days after the increase or decrease, or within any additional period that the Contracting Officer may approve in writing, but not later than the date of final payment under this contract. The notice shall include the Contractor’s proposal for an adjustment in the contract unit prices to be negotiated under paragraph (b) below, and shall include, in the form required by the Contracting Officer, supporting data explaining the cause, effective date, and amount of the increase or decrease and the amount of the Contractor’s adjustment proposal.

(b) Promptly after the Contracting Officer receives the notice and data under paragraph (a) above, the Contracting Officer and the Contractor shall negotiate a price adjustment in the contract unit prices and its effective date. However, the Contracting Officer may postpone the negotiations until an accumulation of increases and decreases in the labor rates (including fringe benefits) and unit prices of material shown in the Schedule results in an adjustment allowable under subparagraph (c)(3) below. The Contracting Officer shall modify this contract (1) to include the price adjustment and its effective date and (2) to revise the labor rates (including fringe benefits) or unit prices of material as shown in the Schedule to reflect the increases or decreases resulting from the adjustment. The Contractor shall continue performance pending agreement on, or determination of, any adjustment and its effective date.

(c) Any price adjustment under this clause is subject to the following limitations:

(1) Any adjustment shall be limited to the effect on unit prices of the increases or decreases in the rates of pay for labor (including fringe benefits) or unit prices for material shown in the Schedule. There shall be no adjustment for

(i) supplies or services for which the production cost is not affected by such changes,

(ii) changes in rates or unit prices other than those shown in the Schedule, or

(iii) changes in the quantities of labor or material used from those shown in the Schedule for each item.

(2) No upward adjustment shall apply to supplies or services that are required to be delivered or performed before the effective date of the adjustment, unless the Contractor’s failure to deliver or perform according to the delivery schedule results from causes beyond the Contractor’s control and without its fault or negligence, within the meaning of the Default clause.

(3) There shall be no adjustment for any change in rates of pay for labor (including fringe benefits) or unit prices for material which would not result in a net change of at least 3 percent of the then-current total contract price. This limitation shall not apply, however, if, after final delivery of all contract line items, either party requests an adjustment under paragraph (b) above.

(4) The aggregate of the increases in any contract unit price made under this clause shall not exceed 10 percent of the original unit price. There is no percentage limitation on the amount of decreases that may be made under this clause.

(d) The Contracting Officer may examine the Contractor’s books, records, and other supporting data relevant to the cost of labor (including fringe benefits) and material during all reasonable times until the end of 3 years after the date of final payment under this contract or the time periods specified in subpart 4.7 of the Federal Acquisition Regulation (FAR), whichever is earlier.

ANSWER – FAR 52.216-4, Economic Price Adjustment-Labor and Materials will not be included in this solicitation

1. 01 00 00, Section 1.25 Photographic Documentation requires the contractor to electronic index, documentation shall combine indexing and navigational system that shall utilize AUTOCAD. Can the Contractor’s Superintendent take progress photos and save them to Procore for the VA’s use?

ANSWER - Yes, this is acceptable.

1. 01 00 00, 1.26 VA TRIRIGA CPMS section requires the contractor to use this software for the project. This software is no longer available. Does the contractor need to use this software?

ANSWER – No

1. Specifications section 14 24 00 Part 2 – Products 2.10 Independent service calls for key operated independent service switch. Does this key switch required to receive a 5 pin best removable core and if so will the government be responsible for keying this core to the existing master key system.

ANSWER - VAMC uses 7 pin Best A4 system. Facility will key the core to existing master key system.

1. Is there an existing sump pit in an existing sump pit with an oil monitoring systems currently installed that is to be reused? The plumbing drawings do not indicate a new pump.

ANSWER - No sump in existing sump pit and is not required.

1. Is there any patching/fire stopping of existing conditions within the elevator shaft/machine room? If so, can this be quantified for bidding purposes?

ANSWER - Life Safety shows both Elevator shaft and Elevator Equipment room as 2-hour Fire Barrier walls.

1. What is the existing ceiling height of the Autopsy A-02 and restrooms A-01D and A-01C? What is the height from floor to structural deck in these locations?

ANSWER - Ceiling approximately 9’. Structural deck approximately 12.’ Contractor to field verify.

1. Are existing duct supports on fifth floor roof to remain for EF #13? If they are to be demolished and replaced provide flashing details of type of roofing and indicate if the roof is currently under warranty.

ANSWER - Existing duct supports to remain.

1. Can government verify that the existing lighting in the shaft complies with current elevator codes?

ANSWER - Contractor to re-use existing lighting.

1. Can government verify that the contractor is to use the existing phone line to the elevator cab?

ANSWER - Contractor to use existing phone line.

1. Can government verify that the contractor is to use existing fire alarm devices/wiring? No new devices/wiring or fire alarm information was indicated on the drawings.

ANSWER - Contractor to use existing fire alarm wiring.

1. Are all of the walls poured concrete for the elevator shaft?

ANSWER - Basement appeared to be poured concrete. 1st floor had minimum 2x CMU walls

1. What type of wall construction is the existing elevator machine room?

ANSWER- Concrete

1. Does the existing elevator machine room have a shaft wall ceiling or is the rating the structural floor above?

ANSWER - Structural floor above.

1. Is there a ceiling in the elevator machine room and if so what height is the ceiling?

ANSWER - No ceiling

1. Detail 4/AD001 states remove section of concrete wall. Sheet GI006 Note states to remove CMU in this same location.

ANSWER - Appears concrete on Basement Level and CMU on 1st floor. Contractor to field verify

15. Is wall CMU or concrete?

0. ANSWER - Depends on level. Contractor to field verify.

15. Does there need to be lintel or C-Channel support need to be added to support the CMU or concrete above the 3’-4” opening?

1. ANSWER - Not shown on drawings, opening to be infilled in per drawings.

1. The POP of 150 days does not seem feasible. Contractor proposes 45 days to complete submittal package. Suspend the project until the Elevator equipment is onsite and ready to be installed. Then 180 days to complete the work.

ANSWER - 150 days PoP total. Suspension of work may be permitted depending on Elevator equipment lead times. All submittal time to be subtracted from total PoP days (ie if submittals take 30 days and stop work issued due to extensive lead times on equipment, remaining PoP is 120 days).

1. Sheet A-001 calls for Resinous flooring with 6” base. What color resinous flooring? ANSWER - Provide samples per Spec 09 67 23.20 Resinous (Epoxy Base) with vinyl chip broadcast (Res-2)

1. Are there noise restrictions either during the day or at night for the saw cutting of elevator shaft wall?

ANSWER - Saw cutting to be coordinated with COR minimum of 72 hours prior to beginning. Due to proximity to Emergency Department and Lab, after hours work may be required.

1. Can the roll up door be blocked while concrete is being pumped into existing jack hole? Note the elevator will be out of service at this time.

ANSWER - Yes.

1. Where will the staging area be located at for dumpsters and connexs for elevator equipment?

ANSWER- Contractor’s to use their existing laydown areas. New contractors to potentially use space next to Fan Room #4

1. What size is the existing elevator machine room door?

ANSWER - 2’-5”x7’

1. Will special inspections be required to test the concrete per specification section 03 30 00?

ANSWER - The concrete is to fill existing jack hole and is not structural.

1. Can the existing Jack Hole be sealed off by other means?

ANSWER - To be sealed off per drawings.

23. Weld a steel plate?

23. Fill with gravel or sand and seal top foot with concrete?

1. Did not see specification section for CMU block for infill called out on note 1 sheet AE102?

ANSWER - Please see 042000_Unit Masonry Doc

Questions and Answers 36C24922B0032 – Upgrade Morgue Exhaust and Elevator

SECTION 04 20 00

UNIT MASONRY

GENERAL

SUMMARY

Section Includes: Concrete masonry unit (CMU)and face brick assemblies for:

Exterior walls.

Interior walls.

RELATED REQUIREMENTS

Sealants and Sealant Installation: Section 07 92 00, JOINT SEALANTS.

APPLICABLE PUBLICATIONS

Comply with references to extent specified in this section.

American Concrete Institute (ACI):

31599 - Details and Detailing of Concrete Reinforcement.

530.1/ASCE 6/TMS 60213 - Specification for Masonry Structures.

ASTM International (ASTM):

A615/A615M15ae1 - Deformed and Plain CarbonSteel Bars for Concrete Reinforcement.

A951/A951M14 - Steel Wire for Masonry Joint Reinforcement.

A1064/A1064M15 - CarbonSteel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete.

C6714 - Sampling and Testing Brick and Structural Clay Tile.

C9014 - LoadBearing Concrete Masonry Units.

C21615 - Facing Brick (Solid Masonry Units Made From Clay or Shale).

D105614 - Flexible Cellular Materials - Sponge or Expanded Rubber.

D224005(2010) - Rubber PropertyDurometer Hardness.

F166715 - Driven Fasteners: Nails, Spikes, and Staples.

American Welding Society (AWS):

D1.4/D1.4M11 - Structural Welding Code - Reinforcing Steel.

Brick Industry Association (BIA):

TN 11B88 - Guide Specifications for Brick Masonry, Part 3.

Federal Specifications (Fed. Spec.):

FFS107C(2) - Screws, Tapping and Drive.

SUBMITTALS

Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Submittal Drawings:

Fabrication, bending, and placement of reinforcing bars. Comply with ACI 315. Show bar schedules, diagrams of bent bars, stirrup spacing, lateral ties and other arrangements and assemblies.

Special masonry shapes, profiles, and placement.

Masonry units for typical window and door openings, and, for special conditions as affected by structural conditions.

Manufacturer's Literature and Data:

Description of each product.

Installation instructions.

Samples:

Face brick: Sample panel, 200 mm by 400 mm (8 inches by 16 inches,) showing full color range and texture of bricks, bond, and proposed mortar joints.

Anchors and Ties: Each type.

Joint Reinforcing: 1200 mm (48 inches) long each type.

Sustainable Construction Submittals:

Recycled Content: Identify postconsumer and preconsumer recycled content percentage by weight.

Certificates: Certify products comply with specifications.

Face brick.

Delegated Design Drawings and Calculations: Signed and sealed by responsible design professional.

QUALITY ASSURANCE

Welders and Welding Procedures Qualifications: AWS D1.4/D1.4M.

DELIVERY

Deliver products in manufacturer's original sealed packaging.

Mark packaging, legibly. Indicate manufacturer's name or brand, type, color, production run number, and manufacture date.

Before installation, return or dispose of products within distorted, damaged, or opened packaging.

STORAGE AND HANDLING

Store products above grade, protected from contamination.

Protect products from damage during handling and construction operations.

FIELD CONDITIONS

Hot and Cold Weather Requirements: Comply with ACI 530.1/ASCE 6/TMS 602.

WARRANTY

Construction Warranty: FAR clause 52.24621, "Warranty of Construction."

PRODUCTS

SYSTEM PERFORMANCE

Delegated Design: Prepare submittal documents including design calculations and drawings signed and sealed by registered design professional, licensed in state where work is located.

PRODUCTS - GENERAL

Provide each product from one manufacturer and from one production run .

Steel Recycled Content: 30 percent total recycled content, minimum.

UNIT MASONRY PRODUCTS

Brick:

Face Brick:

ASTM C216, Grade SW, Type FBS.

Brick when tested according to ASTM C67: Classified slightly efflorescent or better.

Size:

Match existing size.

Face Brick Color: Match existing.

Building Brick: ASTM C62, Grade MW for backup and interior work; Grade SW where in contract with earth.

Concrete Masonry Units (CMU):

Hollow and Solid LoadBearing Concrete Masonry Units: ASTM C90.

Unit Weight: Normal weight.

Fire rated units for fire rated partitions.

Sizes: Modular, 200 mm by 400 mm (8 inches by 16 inches) nominal face dimension; thickness as indicated on drawings.

ANCHORS, TIES, AND REINFORCEMENT

Steel Reinforcing Bars: ASTM A615/A615M; Grade 60, deformed bars.

Joint Reinforcement:

Form from wire complying with ASTM A951/A951M.

Hot dipped galvanized after fabrication.

Width of joint reinforcement 40 mm (1.6 inches) less than nominal thickness of masonry wall or partition.

Cross wires welded to longitudinal wires.

Joint reinforcement minimum 3000 mm (10 feet) long, factory cut.

Joint reinforcement with crimp formed drip is not acceptable.

Maximum spacing of cross wires 400 mm (16 inch) to longitudinal wires.

Ladder Design:

Longitudinal wires deformed 5 mm (0.20 inch) diameter wire .

Cross wires 2.6 mm (0.10 inch) diameter .

Dovetail Anchors:

Corrugated steel dovetail anchors formed of 1.5 mm (0.06 inch) thick by 25 mm (1 inch) wide galvanized steel, 90 mm (31/2 inches) long where used to anchor 100 mm (4 inch) nominal thick masonry units, 140 mm (51/2 inches) long for masonry units more than 100 mm (4 inches) thick.

Triangular wire dovetail anchor 100 mm (4 inch) wide formed of 4 mm (9 gage) steel wire with galvanized steel dovetail insert. Anchor length to extend minimum 75 mm (3 inches) into masonry, 25 mm (1 inch) into 40 mm (11/2 inch) thick units.

Form dovetail anchor slots from 0.6 mm (0.02 inch) thick galvanized steel (with felt or fiber filler).

Individual Ties:

Rectangular ties: Form from 5 mm (3/16 inch) diameter galvanized steel rod to rectangular shape minimum 50 mm (2 inches) wide by sufficient length for ends of ties to extend within 25 mm (1 inch) of each face of wall. Ties that are crimped to form drip are not acceptable.

Adjustable Cavity Wall Ties:

Adjustable wall ties may be furnished at Contractor's option.

Two piece type permitting up to 40 mm (11/2 inch) adjustment.

Form ties from 5 mm (3/16 inch) diameter galvanized steel wire.

Form one piece to rectangular shape 105 mm (41/8 inches) wide by length required to extend into bed joint 50 mm (2 inches).

Form other piece to 75 mm (3 inch) long by 75 mm (3 inch) wide shape, having 75 mm (3 inch) long bent section for engaging 105 mm (41/8 inch) wide piece to form adjustable connection.

Wall Ties, (Mesh or Wire):

Mesh wall ties formed of ASTM A1064/A1064M, W0.5, 2 mm, (0.08 inch) galvanized steel wire 13 mm by 13 mm (1/2 inch by 1/2 inch) mesh, 75 mm (3 inches) wide by 200 mm (8 inches) long.

Rectangular wire wall ties formed of W1.4, 3 mm, (0.12 inch) galvanized steel wire 50 mm (2 inches) wide by 200 mm (8 inches) long.

ACCESSORIES

Shear Keys:

Solid extruded crossshaped section of rubber, neoprene, or polyvinyl chloride, with durometer hardness of approximately 80 when tested according to ASTM D2240, and minimum shear strength of 3.5 MPa (500 psi).

Shear Key Dimensions: Nominal 70 mm by 8 mm for long flange and 38 mm by 16 mm for short flange (23/4 inches by 5/16 inch for long flange, and 11/2 inches by 5/8 inch for short flange).

Weeps:

Weep Hole Wicks: Glass fiber ropes, 10 mm (3/8 inch) minimum diameter, 300 mm (12 inches) long.

Weep Tubing: Round, polyethylene, 9 mm (3/8 inch) diameter, 100 mm (4 inches) long.

Weep Hole: Flexible PVC louvered configuration with rectangular closure strip at top.

Cavity Drain Material: Open mesh polyester sheets or strips to prevent mortar droppings from clogging the cavity.

Preformed Compressible Joint Filler:

Thickness and depth to fill joint.

Closed Cell Neoprene: ASTM D1056, Type 2, Class A, Grade 1, B2F1.

NonCombustible Type: ASTM C612, Type 5, Max. Temp.1800 degrees F.

Masonry Cleaner:

Detergent type cleaner selected for each type masonry.

Acid cleaners are not acceptable.

Use soapless type specially prepared for cleaning brick or concrete masonry as appropriate.

Fasteners:

Concrete Nails: ASTM F1667, Type I, Style 11, 19 mm (3/4 inch) minimum length.

Masonry Nails: ASTM F1667, Type I, Style 17, 19 mm (3/4 inch) minimum length.

Screws: FSFFS107, Type A, AB, SF thread forming or cutting.

G. Flashing: Stainless steel core with polymer fabric laminated to the bottom stainless steel face with non-asphalt adhesive. The top face (exposed side) must not be covered with a polymer fabric.

EXECUTION

INSTALLATION - GENERAL

Install products according to manufacturer's instructions and approved submittal drawings.

When manufacturer's instructions deviate from specifications, submit proposed resolution for Contracting Officer's Representative consideration.

Keep finish work free from mortar smears or spatters and leave neat and clean.

Wall Openings:

Fill hollow metal frames built into masonry walls and partitions solid with mortar as laying of masonry progresses.

When items are not available when walls are built, prepare openings for subsequent installation.

Tooling Joints:

Do not tool until mortar has stiffened enough to retain thumb print when thumb is pressed against mortar.

Tool while mortar is soft enough to be compressed into joints and not raked out.

Finish joints in exterior face masonry work with jointing tool, and provide smooth, watertight concave joint unless specified otherwise.

Tool Exposed interior joints in finish work concave unless specified otherwise.

Lintels:

Lintels are not required for openings less than 1000 mm (40 inches) wide that have hollow metal frames.

Use steel lintels, for openings greater than 1600 m (63 inches) wide, brick masonry openings, and elevator openings unless shown otherwise.

Lintel Bearing Length: Minimum 100 mm (4 inches) at both ends.

Before connecting new masonry with previously laid masonry, remove loosened masonry or mortar, and clean and wet work in place as specified under wetting.

When new masonry partitions start on existing floors, machine cut existing floor finish material down to concrete surface.

INSTALLATION - ANCHORAGE

Masonry Facing to Backup and Cavity Wall Ties:

Use individual ties for new work.

Stagger ties in alternate courses, and space at 400 mm (16 inches) maximum vertically, and 400 mm (16 inches) horizontally.

At openings, provide additional ties spaced maximum 900 mm (36 inches) apart vertically around perimeter of opening, and within 300 mm (12 inches) from edge of opening.

Anchor new masonry facing to existing masonry with adjustable cavity wall ties spaced at 400 mm (16 inch) maximum vertical intervals and at every second masonry unit horizontally. Fasten ties to masonry with masonry nails.

Option: Install joint reinforcing for multiple wythes and cavity wall ties spaced maximum 400 mm (16 inches) vertically.

Tie interior and exterior wythes of reinforced masonry walls together with individual ties. Provide ties at intervals maximum 400 mm (16 inches) on center horizontally, and 400 mm (16 inches) on center vertically. Lay ties in the same line vertically in order to facilitate vibrating of the grout pours.

INSTALLATION - REINFORCEMENT

Joint Reinforcement:

Install joint reinforcement in CMU wythe of combination brick and CMU, cavity walls, and single wythe concrete masonry unit walls or partitions.

Reinforcing is acceptable in lieu of individual ties for anchoring brick facing to CMU backup in exterior masonry walls.

Locate joint reinforcement in mortar joints at 400 mm (16 inch) maximum vertical intervals.

Additional joint reinforcement is required in mortar joints at both 200 mm (8 inches) and 400 (16 inches) above and below windows, doors, louvers and similar openings in masonry.

Steel Reinforcing Bars:

Install reinforcing bars in cells of hollow masonry units where required for vertical reinforcement and in bond beam units for horizontal reinforcement. Install in wall cavities of reinforced masonry walls where indicated on drawings.

Grout openings:

Leave cleanout holes in double wythe walls during construction by omitting units at base of one side of wall.

Locate 75 mm by 75 mm (3 inches. by 3 inches.) min. cleanout holes at location of vertical reinforcement.

Keep grout space clean of mortar accumulation and debris. Clean as work progresses and immediately before grouting.

INSTALLATION - ISOLATION JOINT

Where full height walls and partitions lie parallel or perpendicular to and under structural beams and shelf angles, provide minimum 9 mm (3/8 inch) separation between walls and partitions and bottom of beams and shelf angles.

Insert continuous full width strip of noncombustible type compressible joint filler.

Fill opening in exposed face of isolation joints with sealant as specified in Section 07 92 00, JOINT SEALANTS.

INSTALLATION - BRICKWORK

Lay clay brick according to BIA TN 11B.

Laying:

Lay brick in onehalf running bond with bonded corners, unless indicated otherwise. Match bond of existing building on alterations and additions.

Maintain bond pattern throughout.

Do not use brick smaller than halfbrick at any angle, corner, break, and jamb.

Where length of cut brick is greater than one half length, maintain vertical joint location.

Lay exposed brickwork joints symmetrical about center lines of openings.

Do not structurally bond multiwythe brick walls, unless indicated on drawings.

Before starting work, lay facing brick on foundation wall and adjust bond to openings, angles, and corners.

Lay brick for sills with wash and drip.

Build solid brickwork as required for anchorage of items.

Joints:

Exterior And Interior Joint Widths: Lay for three equal joints in 200 mm (8 inches) vertically, unless shown otherwise.

Rake joints for pointing with colored mortar when colored mortar is not full depth.

Weep Holes:

Install weep holes at 600 mm (24 inches) on center in bottom of vertical joints of exterior masonry veneer or cavity wall facing over foundations, bond beams, and other water stops in wall.

Form weep holes using wicks made of mineral fiber insulation strips turned up 200 mm (8 inches) in cavity. Anchor top of strip to backup to securely hold in place.

Cavity Walls:

Keep air space clean of mortar accumulations and debris.

POINTING

Fill joints with pointing mortar using rubber float trowel to apply mortar solidly into raked joints.

Wipe off excess mortar from joints of glazed masonry units with dry cloth.

Tool exposed joints to smooth concave joint.

At joints with existing work, match existing joint.

GROUTING

Preparation:

Clean grout space of mortar droppings before placing grout.

Close cleanouts.

Install vertical solid masonry dams across grout space for full height of wall at intervals of maximum 9000 mm (30 feet). Do not bond dam units into wythes as masonry headers.

Verify reinforcing bars are installed as indicated on drawings.

Placing:

Place grout in grout space in lifts as specified.

Consolidate each grout lift after free water has disappeared but before plasticity is lost.

Do not slush with mortar or use mortar with grout.

Interruptions:

When grouting must be stopped for more than an hour, top off grout 40 mm (11/2 inches) below top of last masonry course.

Grout from dam to dam on high lift method.

Longitudinal run of masonry may be stopped off only by raking back onehalf masonry unit length in each course and stopping grout 100 mm (4 inches) back of rake on low lift method.

Puddling Method:

Consolidate by puddling with grout stick during and immediately after placing.

Grout cores of concrete masonry units containing reinforcing bars solid as masonry work progresses.

Low Lift Method:

Construct masonry to 1.5 m (5 feet) maximum height before grouting.

Grout in one continuous operation and consolidate grout by mechanical vibration and reconsolidate after initial water loss and settlement has occurred.

High Lift Method:

Do not pour grout until masonry wall has cured minimum of 4 hours.

Place grout in 1.5 m (5 feet) maximum lifts.

Exception:

Where following conditions are met, place grout in 3.86 m (12.67 feet) maximum lifts.

Masonry has cured minimum of 4 hours.

Grout slump is maintained between 250 and 275 mm (10 and 11 inches).

No intermediate reinforced bond beams are placed between top and bottom of grout lift.

When vibrating succeeding lifts, extend vibrator 300 to 450 mm (12 to 18 inches) into preceding lift.

PLACING REINFORCEMENT

General: Clean reinforcement of loose rust, mill scale, earth, ice or other materials which will reduce bond to mortar or grout. Do not use reinforcement bars with kinks or bends not shown on drawings or approved submittal drawings, or bars with reduced crosssection due to excessive rusting or other causes.

Position reinforcement accurately at spacing indicated on drawings. Support and secure vertical bars against displacement. Install horizontal reinforcement as masonry work progresses. Where vertical bars are shown in close proximity, provide clear distance between bars of minimum one bar diameter or 25 mm (1 inch), whichever is greater.

INSTALLATION OF REINFORCED CONCRETE UNIT MASONRY

Do not wet concrete masonry units (CMU).

Lay CMU units with fullface shell mortar beds. Fill vertical head joints (end joints between units) solidly with mortar from face of unit to distance behind face equal to thickness of longitudinal face shells. Solidly bed crosswebs of starting courses in mortar. Maintain head and bed 9 mm (3/8 inch) joint widths.

Where solid CMU units are shown, lay with full mortar head and bed joints.

Walls:

Pattern Bond: Lay CMU wall units in 1/2running bond with vertical joints in each course centered on units in courses above and below, unless otherwise indicated. Bond and interlock each course at corners and intersections. Use specialshaped units where shown, and as required for corners, jambs, sash, control joints, lintels, bond beams and other special conditions.

Maintain vertical continuity of core or cell cavities, which are to be reinforced and grouted, to provide minimum clear dimension indicated and to provide minimum clearance and grout coverage for vertical reinforcement bars. Keep cavities free of mortar. Solidly bed webs in mortar where adjacent to reinforced cores or cells.

Where horizontally reinforced beams (bond beams) are indicated on drawings, use special units or modify regular units to allow for placement of continuous horizontal reinforcement bars. Place small mesh expanded metal lath or wire screening in mortar joints under bond beam courses over cores or cells of nonreinforced vertical cells, or provide units with solid bottoms.

CONSTRUCTION TOLERANCES

Lay masonry units plumb, level and true to line within tolerances according to ACI 530.1/ASCE 6/TMS 602 and as follows:

Maximum variation from plumb:

In 3000 mm (10 feet) - 6 mm (1/4 inch).

Maximum variation from level:

In any bay or up to 6000 mm (20 feet) - 6 mm (1/4 inch).

Maximum variation from linear building lines:

In any bay or up to 6000 mm (20 feet) - 13 mm (1/2 inch).

Maximum variation in crosssectional dimensions of columns and thickness of walls from dimensions shown:

Minus 6 mm (1/4 inch).

Plus 13 mm (1/2 inch).

Maximum variation in prepared opening dimensions:

Accurate to minus 0 mm (0 inch).

Plus 6 mm (1/4 inch).

CLEANING AND REPAIR

General:

Clean exposed masonry surfaces on completion.

Protect adjoining construction materials and landscaping during cleaning operations.

Cut out defective exposed new joints to depth of approximately 19 mm (3/4 inch) and repoint.

Remove mortar droppings and other foreign substances from wall surfaces.

Brickwork:

First wet surfaces with clean water, then wash down with detergent solution. Do not use muriatic acid.

Brush with stiff fiber brushes while washing, and immediately wash with clean water.

Remove traces of detergent, foreign streaks, or stains of any nature.

Concrete Masonry Units:

Immediately following setting, brush exposed surfaces free of mortar or other foreign matter.

Allow mud to dry before brushing.

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UNIT MASONRY

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