Pre-ProposalMTG-_Q A.pdf

Facility:

Work Description:

PDG Job No.:

GSA Project No.:

Bob Casey Federal Courthouse USMS Sallyport & Elevator CM&I

15028 GSA Contract No.:

Meeting Date: Tuesday, February 17, 2015

Items Discussed

Attendees

Meeting Notes

Meeting Purpose: Pre-Proposal Meeting

Name Representing Phone Email

PDG architects design with your future in mind

Rod Blouin (832) 597-8458

Isaac Karto (832) 597-8464

Larry Saravo (832) 397-8459

James Gersch (713) 629-6100

Bob Adams (713) 629-6100

Wendell Robbins (713) 857-8122

John Roos (281) 701-9058

Keith Foshee (334) 898-2700

Nate Weight (334) 898-2700

Sam Wise (334) 898-2700

Tuan Nguyen (832) 397-8425

Wanda Price (713) 718-4800

George Ball (210) 758-2990

GSA

GSA

GSA

PDG

PDG

WRC

JGR

HMR

HMR

HMR

GSA

USMS

JGR

roderick.blouin@gsa.gov isaac.karto@gsa.gov larry.saravo@gsa.gov jgersch@pdgarchitects.com badams@pdgarchitects.com werobbjr@aol.com jhr000@aol.com kfoshee@hammer-lgc.com kfoshee@hammer-lgc.com swise@hammer-lgc.com tuan.nguyen@gsa.gov

Wanda.Price@usdoj.gov ghbjr56@gmail.com

All questions are due in writing by February 20th to GSA.1.

Tuesday, February 24th all responses will be uploaded by GSA.2.

Proposals are due on March 2nd by 3 pm.3.

GSA reviews proposals based on a number of factors: Management Plan, Experience, Experience/Qualification of Personnel, and Price.

-Personnel submitted within the proposals are to be the same personnel to work on the job when the contract is awarded. Work is expected to begin within 10 days of Contract Award.

-Bids are to be good for 120 days.

4.

The question was asked if GSA would entertain 8 years of passed experience in lieu of 5 years of experience.

5.

The issue of how the existing secured parking area would be secured during construction. The idea of constructing a wood fence of equal height to the existing stone wall was discussed. An overall construction fence at the outer extents of the work will be required to keep the public away. This fence is to be the same height as the existing stone wall and is to have an opaque mesh or screen on it to block view into the work zone.

6.

The awarded contractor is expected to work with and coordinate with Metro for the necessary tie-ins of infrastructure to complete the work.

7.

3100 Weslayan, Suite 200 Houston, Texas 77027

713.629.6100 713.629.6123 Fax www.pdgarchitects.com

Tuesday, February 17, 2015Pre-Proposal Meeting Notes

The project construction duration is expected to be 365 days.8.

PDG's Construction Manager will be Bill Gaskey (713-629-6100).9.

A question was asked to where staging may take place. Staging on the west side, where the construction is to occur was discussed.

10.

A question was asked regarding the exterior finishes, manufacturer, and the idea of matching materials. The materials indicated in the contract documents are basis of design materials that have been approved by the Courts.

11.

cc: PDG Architects: Project File

The foregoing constitutes our understanding of matters discussed and conclusions reached. Participants are requested to advise this office of any corrections or additions to the items contained in this memorandum. Absent timely notification of exceptions these minutes shall be considered complete and accurate.

3100 Weslayan, Suite 200 Houston, Texas 77027

713.629.6100 713.629.6123 Fax www.pdgarchitects.com

Q: Thyssenkrupp Elevator has a concern that the specified elevator may not be able to support the cage inside the cab of the elevator. Is it possible to add a machine room? Thyssennkrupp's engineering department is reviewing the plans & specs to determine exactly what will need to be done.

A: The basis of design elevator manufacturer’s engineering department reviewed the initial plans and USMS requirements during the design stage to help select the best type of elevator unit to be installed within the strict parameters and design considerations this project demanded. A machine room is not an option at this point due to the noise factor and additional costs associated with such a change in design.

Q. Where you going to provide the Meeting Minutes and the sign in list for the pre-proposal meeting held on Tuesday Feb 17th at Bob Casey?

A: Yes, the minutes and sign in sheet from the pre-proposal conference are attached.

Q. This is a request to extend the Proposal due date 45 days? The reason is the complexity of and the multiple subcontractors involved in this project to provide a proper proposal that will be fair and balanced.

A: The proposal due date has been extended for an additional 8 days. Proposals are now due on Tuesday, March 10, 2015, at 3:00 PM CST. Proposals submitted after this date will not be accepted.

Q. Must the Offeror be verified as a Service-Disabled, Veteran-Owned Small Business by the

CVE?

A: As this proposal is Set Aside for Service Disabled Veteran Owned Businesses, all proposals received will be verified with the SBA and Department of Veterans Affairs (VA). Firms that are not certified by the VA as meeting this criterion will be disqualified.

Q. May the past performance period be extended further than five (5) years?

A: The past performance period is now extended for 10 years. Projects meeting the definition of similar as defined in the solicitation may be submitted as long as they were completed within the last 10 years.

Q. The attachment to SF 1442 does not reflect the Specification CSI Divisions, does the SF 1442 need to be revised to include all Divisions as identified by Specifications i.e. Division 3 - Concrete, Division 4 - Masonry, Division 31 - Earthwork??

A: The price proposal form provided in the SF-1442 is a sample form; contractors may use any format/form they choose to use as long as all pertinent information are provided.

Q. Is it possible to extend Bid Date for a couple of weeks?

A: See the answer to question 3.

PDG Project No. 15028

AMENDMENT NUMBER 01

PDG Architects Houston, Texas

Bob Casey Federal Courthouse USMS Sallyport & Elevator CM&I GSA - Houston, TX

Documents Dated 03/27/2013Amendment Dated 02/24/2015

DRAWINGS

1. A2.04 - 01, 02, 03, 05, 06, 07, 09, 10

Notes indicated 4" Polished CMU (CMU-G) are to read: 4" Polished CMU (CMU-F).�

2. A2.04 - 02

Note indicating 7-5/8" CMU One Face Glazed (CMU-E) is read: 8" Panted CMU (CMU-D).�

3. A2.04 - 06

Note indicating 7-5/8" Glazed CMU (CMU-F) is to read: 8" Multi-Sided Glazed CMU (CMU-E)�

4. A6.02 - 09

Finish Material Schedule: CMU-E is to be 8" CMU Multi-Faced, HCM Trenwyth, Astra-Glaze CMU and is to be located in the Prisoner Circulation only.

GENERAL

5.

Note to all bidders: Rytec Corporation High Speed Coiling Doors, System 4 is to be considered an approved substitution within Specification 083323.

The finishes indicated in the construction documents were approved by the courts and the Historical Association regarding type and color. Manufactureres listed are a basis of design.

The secured parking area will need to remain secured even during construction. Erection of a sturdy fence (wood) would be an acceptable material but must be as tall as the existing stone wall. An overall construction fence at the outer extents of the work will be required to keep the public away. The overall construction fence is to be the same height as the existing stone wall but will not require a mesh screen.

QUESTIONS

6.

Q) Thyssenkrupp Elevator has a concern that the specified elevator may not be able to support the cage inside the cab of the elevator. Is it possible to add a machine room? Thyssennkrupp's engineering department is reviewing the plans & specs to determine exactly what will need to be done.

A) The basis of design elevator manufacturer's engineering department reviewed the initial plans and USMS requirements during the design stage to help select the best type of elevator unit to be installed within the strict parameters and design considerations this project demanded. A machine room is not an option at this point due to the noise factor and additional costs associated with such a change in design.

Q) Where can staging take place?

A) Staging space on this project is limited to the west side of the building within and around the scope of work project area.

SPECIFICATIONS

7.

Specification Section 04220 Concrete Unit Masonry will be re-issued it its entirety.�

END OF AMENDMENT

AMENDMENT NUMBER 01 PAGE 1 OF 1

Department of Justice SALLYPORT AND ELEVATOR Bob Casey Courthouse U.S. Marshals Service Houston, TX

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SECTION 042200 - CONCRETE UNIT MASONRY

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and

Supplementary Conditions and Division 01 Specification Sections, apply to this

Section.

1.2 SUMMARY

A. Section Includes:

1. Concrete masonry units.

2. Mortar and grout.

3. Steel reinforcing bars.

4. Masonry joint reinforcement.

5. Ties and anchors.

6. Miscellaneous masonry accessories.

B. Related Sections:

1. Section 033000 "Cast-in-Place Concrete" for installing dovetail slots for masonry anchors.

2. Section 051200 "Structural Steel Framing" for installing anchor sections of adjustable masonry anchors for connecting to structural-steel frame.

3. Section 071900 "Water Repellents" for water repellents applied to concrete unit masonry.

4. Section 076200 "Sheet Metal Flashing and Trim" for exposed sheet metal flashing and for furnishing manufactured reglets installed in masonry joints.

1.3 BUY AMERICAN ACT

A. Refer to Section 011000 “Summary” for Buy American Act requirements.

1.4 DEFINITIONS

A. CMU(s): Concrete masonry unit(s).

B. Reinforced Masonry: Masonry containing reinforcing steel in grouted cells.

1.5 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Shop Drawings: For the following:

1. Masonry Units: Show sizes, profiles, coursing, and locations of special shapes.

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2. Reinforcing Steel: Detail bending and placement of unit masonry reinforcing bars. Comply with ACI 315, "Details and Detailing of Concrete

Reinforcement." Show elevations of reinforced walls.

C. Material Certificates: For each type and size of the following:

1. Masonry units.

a. Include data on material properties.

3. Cementitious materials. Include brand, type, and name of manufacturer.

4. Preblended, dry mortar mixes. Include description of type and proportions of ingredients.

5. Grout mixes. Include description of type and proportions of ingredients.

6. Reinforcing bars.

7. Joint reinforcement.

8. Anchors, ties, and metal accessories.

D. Mix Designs: For each type of mortar and grout. Include description of type and proportions of ingredients.

1.6 QUALITY ASSURANCE

A. Source Limitations for Masonry Units: Obtain exposed masonry units of a uniform texture and color, or a uniform blend within the ranges accepted for these characteristics, from single source from single manufacturer for each product required.

B. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, including color for exposed masonry, from single manufacturer for each cementitious component and from single source or producer for each aggregate.

C. Masonry Standard: Comply with ACI 530.1/ASCE 6/TMS 602 unless modified by requirements in the Contract Documents.

D. Sample Panels: Build sample panels to verify selections made under sample submittals and to demonstrate aesthetic effects. Comply with requirements in

Division 01 Section "Quality Requirements" for mockups.

1. Build sample panels for each type of exposed unit masonry construction typical interior wall in sizes approximately 60 inches long by 48 inches high by full thickness.

2. Protect approved sample panels from the elements with weather-resistant membrane.

3. Approval of sample panels is for color, texture, and blending of masonry units; relationship of mortar and sealant colors to masonry unit colors; tooling of joints; aesthetic qualities of workmanship; and other material and construction qualities specifically approved by Architect in writing.

a. Approval of sample panels does not constitute approval of deviations from the Contract Documents contained in sample panels unless such deviations are specifically approved by Architect in writing.

1.7 DELIVERY, STORAGE, AND HANDLING

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A. Store masonry units on elevated platforms in a dry location. If units are not stored in an enclosed location, cover tops and sides of stacks with waterproof sheeting, securely tied. If units become wet, do not install until they are dry.

B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not use cementitious materials that have become damp.

C. Store aggregates where grading and other required characteristics can be maintained and contamination avoided.

D. Deliver preblended, dry mortar mix in moisture-resistant containers designed for use with dispensing silos. Store preblended, dry mortar mix in delivery containers on elevated platforms, under cover, and in a dry location or in covered weatherproof dispensing silos.

E. Store masonry accessories, including metal items, to prevent corrosion and accumulation of dirt and oil.

1.8 PROJECT CONDITIONS

A. Protection of Masonry: During construction, cover tops of walls, projections, and sills with waterproof sheeting at end of each day's work. Cover partially completed masonry when construction is not in progress.

1. Extend cover a minimum of 24 inches down both sides of walls and hold cover securely in place.

B. Do not apply uniform floor or roof loads for at least 12 hours and concentrated loads for at least three days after building masonry walls or columns.

C. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be left exposed or painted. Immediately remove grout, mortar, and soil that come in contact with such masonry.

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

2. Protect sills, ledges, and projections from mortar droppings.

3. Protect surfaces of window and door frames, as well as similar products with painted and integral finishes, from mortar droppings.

4. Turn scaffold boards near the wall on edge at the end of each day to prevent rain from splashing mortar and dirt onto completed masonry.

D. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost or by freezing conditions. Comply with cold-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602.

1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40 deg F and higher and will remain so until masonry has dried, but not less than 7 days after completing cleaning.

E. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602.

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PART 2 - PRODUCTS

2.1 MASONRY UNITS, GENERAL

A. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to contain chips, cracks, or other defects exceeding limits stated in the standard. Do not use units where such defects will be exposed in the completed Work.

B. Fire-Resistance Ratings: Where indicated, provide units that comply with requirements for fire-resistance ratings indicated as determined by testing according to ASTM E 119, by equivalent masonry thickness, or by other means, as acceptable to authorities having jurisdiction.

2.2 CONCRETE MASONRY UNITS

A. Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposed faces of adjacent units unless otherwise indicated.

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

2. Provide square-edged units for outside corners unless otherwise indicated.

B. CMU-A: ASTM C 90. – 6-Inch Unfinished

1. Interior CMU: Basis-of-Design Product: Drawings are based on the

Headwaters Construction Materials 6”x8”x16” Unfinished CMU. Comparable manufacturer’s that comply with the criteria within this specification are allowed.

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.

4. Exposed Faces: Provide color and texture matching the range represented by

Architect's sample.

C. CMU-B: ASTM C 90. – 6-Inch Glazed-Single Sided

1. Interior CMU: Basis-of-Design Product: Drawings are based on the Trenwyth

6”x8”x16” Astra-Glaze CMU units distributed by Headwaters Construction

Materials. Comparable manufacturer’s that comply with the criteria within this specification are allowed.

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.

4. Exposed Faces: Provide color and texture matching the range represented by

Architect's sample. Exposed faces to the interior are to be glazed (One-

Sided). Color to be: Ivory. Corners are to be bullnose rounded and bases are to be round coved.

5. Grout color to match field color.

6. Facing to be in compliance with ASTM C744.

7. Comply with Manufacturer’s installation and maintenance recommendations.

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D. CMU-C: ASTM C 90. – 6-Inch Glazed-Multi-Sided

1. Interior CMU: Basis-of-Design Product: Drawings are based on the Trenwyth

6”x8”x16”, Astra-Glaze CMU units distributed by Headwaters Construction

Materials. Comparable manufacturer’s that comply with the criteria within this specification are allowed.

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.

4. Exposed Faces: Provide color and texture matching the range represented by

Architect's sample. All faces to the interior are to be glazed (All Sides). Color to be: Ivory. Corners are to be bullnose rounded and bases are to be round coved.

5. Grout color to match field color.

6. Facing to be in compliance with ASTM C744.

7. Comply with Manufacturer’s installation and maintenance recommendations.

E. CMU-D: ASTM C 90 – 8-Inch Epoxy Painted.

1. Interior CMU: Basis-of-Design Product: Drawings are based on the

Headwaters Construction Materials 8”x8”x16” Unfinished CMU. Comparable manufacturer’s that comply with the criteria within this specification are allowed.

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.

4. Exposed Faces: Provide color and texture matching the range represented by

Architect's sample. Exposed faces must be epoxy painted.

F. CMU-E: ASTM C 90. – 8-Inch Glazed-Multi-Sided

1. Interior CMU: Basis-of-Design Product: Drawings are based on the Trenwyth

8”x8”x16”, Astra-Glaze CMU units distributed by Headwaters Construction

Materials. Comparable manufacturer’s that comply with the criteria within this specification are allowed.

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.

4. Exposed Faces: Provide color and texture matching the range represented by

Architect's sample. All faces to the interior are to be glazed (All Sides). Color to be: Ivory. Corners are to be bullnose rounded and bases are to be round coved.

5. Grout color to match field color.

6. Facing to be in compliance with ASTM C744.

7. Comply with Manufacturer’s installation and maintenance recommendations.

G. CMU-F: ASTM C 90. Exterior Oversized-Polished CMU

1. Exterior CMU: Basis-of-Design Product: Drawings are based on the

Headwaters Construction Materials 4x16x24” Polished Series Oversize CMU

(color: HCM#700 White Limestone) manufactured in Alleyton, Tx.(713)397-

8098. Polished Series Oversize CMU are manufactured with integral water

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PDG architects repellent KRETEControl 250;Krete, Industries. Comparable manufacturer’s that comply with the criteria within this specification are allowed.

2. Density Classification: Normal weight.

3. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.

4. Exposed Faces: Provide color and texture matching the range represented by

Architect's sample. Exposed faces to the exterior are to be Polished.

5. Grout Color to be HCM White Limestone.

6. Comply with Manufacturer’s installation and maintenance recommendations.

7. Apply Manufacturer’s recommended Masonry sealer.

8. Manufacturer’s CMU is to be constructed utilizing integral water repellent.

a. Integral Water Repellent: Liquid polymeric, integral water-repellent admixture that does not reduce flexural bond strength. Units made with integral water repellent, when tested according to ASTM E514 as a wall assembly made with mortar containing integral water-repellent manufacturer's mortar additive, with test period extended to 24 hours, shall show no visible water or leaks on the back of test specimen.

b. Water-Repellent Admixture: Liquid water-repellent mortar admixture intended for use with CMUs, containing integral water repellent by same manufacturer.

2.3 MASONRY LINTELS

A. General: Provide one of the following:

B. Masonry Lintels: Prefabricated or built-in-place masonry lintels made from bond beam CMUs with reinforcing bars placed as indicated and filled with coarse grout.

Cure precast lintels before handling and installing. Temporarily support built-in-place lintels until cured. Masonry lintels within glazed walls are to be glazed at the exposed sides.

2.4 MORTAR AND GROUT MATERIALS

A. Masonry Cement: ASTM C 91.

B. Aggregate for Mortar: ASTM C 144.

1. For mortar that is exposed to view, use washed aggregate consisting of natural sand or crushed stone.

C. Aggregate for Grout: ASTM C 404.

D. Water: Potable.

E. All joints and cores are to be solidly grouted.

2.5 REINFORCEMENT

A. Uncoated Steel Reinforcing Bars: ASTM A 615/A 615M or ASTM A 996/A 996M, Grade 60.

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B. Masonry Joint Reinforcement, General: ASTM A 951/A 951M.

1. Interior Walls: Hot-dip galvanized, carbon steel.

2. Exterior Walls: Hot-dip galvanized, carbon steel.

3. Wire Size for Side Rods: 0.187-inchdiameter.

4. Wire Size for Cross Rods: 0.148-inchdiameter.

5. Wire Size for Veneer Ties: 0.187-inchdiameter.

6. Spacing of Cross Rods, Tabs, and Cross Ties: Not more than 16 inches o.c.

7. Provide in lengths of not less than 10 feet, with prefabricated corner and tee units.

8. Reinforce walls with one (No. 4) bare every 24” on center vertically and two

(No. 4) bars every 24” on center horizontally. Reinforcing shall be tied into the floor and ceiling slabs.

C. Masonry Joint Reinforcement for Single-Wythe Masonry: Either ladder or truss type with single pair of side rods.

2.6 TIES AND ANCHORS

A. Materials: Provide ties and anchors specified in this article that are made from materials that comply with the following unless otherwise indicated.

1. Mill-Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M; with

ASTM A 641/A 641M, Class 1 coating.

2. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M; with

ASTM A 153/A 153M, Class B-2 coating.

3. Galvanized Steel Sheet: ASTM A 653/A 653M, Commercial Steel, G60 zinc coating.

4. Steel Sheet, Galvanized after Fabrication: ASTM A 1008/A 1008M, Commercial Steel, with ASTM A 153/A 153M, Class B coating.

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

B. Adjustable Anchors for Connecting to Concrete: Provide anchors that allow vertical or horizontal adjustment but resist tension and compression forces perpendicular to plane of wall.

1. Connector Section: Dovetail tabs for inserting into dovetail slots in concrete and attached to tie section; formed from 0.060-inch-thick, steel sheet, galvanized after fabrication.

2. Corrugated Metal Ties: Metal strips not less than 7/8 inch wide with corrugations having a wavelength of 0.3 to 0.5 inch and an amplitude of 0.06 to 0.10 inch made from 0.075-inch-thick, steel sheet, galvanized after fabrication with dovetail tabs for inserting into dovetail slots in concrete and sized to extend to within 1 inch of masonry face.

2.7 MISCELLANEOUS MASONRY ACCESSORIES

A. Compressible Filler: Premolded filler strips complying with ASTM D 1056, Grade 2A1; compressible up to 35 percent; of width and thickness indicated;

formulated from neoprene urethane or PVC.

B. Preformed Control-Joint Gaskets: Made from styrene-butadiene-rubber compound, complying with ASTM D 2000, Designation M2AA-805 or PVC, complying with

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ASTM D 2287, Type PVC-65406 and designed to fit standard sash block and to maintain lateral stability in masonry wall; size and configuration as indicated.

C. Bond-Breaker Strips: Asphalt-saturated, organic roofing felt complying with

ASTM D 226, Type I (No. 15 asphalt felt).

D. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonry unit cells and hold reinforcing bars in center of cells. Units are formed from 0.148-inchsteel wire, hot-dip galvanized after fabrication. Provide units designed for number of bars indicated.

E. Mortar Nets: Trapezoidal shaped mortar dropping collection device with Insect

Barrier for masonry cavity walls. Basis of Design: Mortar Net USA, Ltd. Mortar

Net with Insect Barrier.

2.8 MORTAR AND GROUT MIXES

A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators, retarders, water-repellent agents, antifreeze compounds, or other admixtures unless otherwise indicated.

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

2. Use masonry cement mortar unless otherwise indicated.

3. For exterior masonry, use masonry cement mortar.

4. For reinforced masonry, use masonry cement mortar.

5. Add cold-weather admixture (if used) at same rate for all mortar that will be exposed to view, regardless of weather conditions, to ensure that mortar color is consistent.

B. Mortar for Unit Masonry: Comply with ASTM C 270, Property Specification.

Provide the following types of mortar for applications stated unless another type is indicated or needed to provide required compressive strength of masonry.

1. For masonry below grade or in contact with earth, use Type M.

2. For reinforced masonry, use Type S.

3. For mortar parge coats, use Type S.

4. For exterior, above-grade, load-bearing and non-load-bearing walls and parapet walls; for interior load-bearing walls; for interior non-load-bearing partitions; and for other applications where another type is not indicated, use

Type S.

C. Grout for Unit Masonry: Comply with ASTM C 476.

1. Use grout of type indicated or, if not otherwise indicated, of type (fine or coarse) that will comply with Table 1.15.1 in ACI 530.1/ASCE 6/TMS 602 for dimensions of grout spaces and pour height.

2. Proportion grout in accordance with ASTM C 476, Table 1 or paragraph 4.2.2 for specified 28-day compressive strength indicated, but not less than 2000 psi.

3. Provide grout with a slump of 9 to 11 inches as measured according to

ASTM C 143/C 143M.

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PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of the Work.

1. For the record, prepare written report, endorsed by Installer, listing conditions detrimental to performance of work.

2. Verify that foundations are within tolerances specified.

3. Verify that reinforcing dowels are properly placed.

B. Before installation, examine rough-in and built-in construction for piping systems to verify actual locations of piping connections.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION, GENERAL

A. Build chases and recesses to accommodate items specified in this and other

Sections.

B. Leave openings for equipment to be installed before completing masonry. After installing equipment, complete masonry to match the construction immediately adjacent to opening.

C. Use full-size units without cutting if possible. If cutting is required to provide a continuous pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp, unchipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut units with cut surfaces and, where possible, cut edges concealed.

3.3 TOLERANCES

A. Dimensions and Locations of Elements:

1. For dimensions in cross section or elevation do not vary by more than plus

1/2 inch or minus 1/4 inch.

2. For location of elements in plan do not vary from that indicated by more than plus or minus 1/2 inch.

3. For location of elements in elevation do not vary from that indicated by more than plus or minus 1/4 inch in a story height or 1/2 inch total.

B. Lines and Levels:

1. For bed joints and top surfaces of bearing walls do not vary from level by more than 1/4 inch in 10 feet, or 1/2 inch maximum.

2. For conspicuous horizontal lines, such as lintels, sills, parapets, and reveals, do not vary from level by more than 1/8 inch in 10 feet, 1/4 inch in 20 feet, or 1/2 inch maximum.

3. For vertical lines and surfaces do not vary from plumb by more than 1/4 inch in 10 feet, 3/8 inch in 20 feet, or 1/2 inch maximum.

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4. For conspicuous vertical lines, such as external corners, door jambs, reveals, and expansion and control joints, do not vary from plumb by more than 1/8 inch in 10 feet, 1/4 inch in 20 feet, or 1/2 inch maximum.

5. For lines and surfaces do not vary from straight by more than 1/4 inch in 10 feet, 3/8 inch in 20 feet, or 1/2 inch maximum.

6. For vertical alignment of exposed head joints, do not vary from plumb by more than 1/4 inch in 10 feet, or 1/2 inch maximum.

C. Joints:

1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch, with a maximum thickness limited to 1/2 inch.

2. For exposed bed joints, do not vary from bed-joint thickness of adjacent courses by more than 1/8 inch.

3. For head and collar joints, do not vary from thickness indicated by more than plus 3/8 inch or minus 1/4 inch.

4. For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8 inch.

3.4 LAYING MASONRY WALLS

A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint thicknesses and for accurate location of openings, movement-type joints, returns, and offsets. Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at other locations.

B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in running bond do not use units with less than nominal 4-inchhorizontal face dimensions at corners or jambs.

C. Lay concealed masonry with all units in a wythe in running bond or bonded by lapping not less than 4-inches. Bond and interlock each course of each wythe at corners. Do not use units with less than nominal 4-inchhorizontal face dimensions at corners or jambs.

D. Stopping and Resuming Work: Stop work by racking back units in each course from those in course below; do not tooth. When resuming work, clean masonry surfaces that are to receive mortar before laying fresh masonry.

E. Built-in Work: As construction progresses, build in items specified in this and other

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

F. Fill space between steel frames and masonry solidly with mortar unless otherwise indicated.

G. Where built-in items are to be embedded in cores of hollow masonry units, place a layer of metal lath, wire mesh, or plastic mesh in the joint below and rod mortar or grout into core.

H. Fill cores in hollow CMUs with grout 24 inches under bearing plates, beams, lintels, posts, and similar items unless otherwise indicated.

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I. Build non-load-bearing interior partitions full height of story to underside of solid floor or roof structure above unless otherwise indicated.

1. Install compressible filler in joint between top of partition and underside of structure above.

2. Fasten partition top anchors to structure above and build into top of partition.

Grout cells of CMUs solidly around plastic tubes of anchors and push tubes down into grout to provide 1/2-inchclearance between end of anchor rod and end of tube. Space anchors 48 inches o.c. unless otherwise indicated.

3. Wedge non-load-bearing partitions against structure above with small pieces of tile, slate, or metal. Fill joint with mortar after dead-load deflection of structure above approaches final position.

4. At fire-rated partitions, treat joint between top of partition and underside of structure above to comply with Division 07 Section "Fire-Resistive Joint

Systems."

3.5 MORTAR BEDDING AND JOINTING

A. Lay hollow CMUs as follows:

1. With face shells fully bedded in mortar and with head joints of depth equal to bed joints.

2. With webs fully bedded in mortar in all courses of piers, columns, and pilasters.

3. With webs fully bedded in mortar in grouted masonry, including starting course on footings.

4. With entire units, including areas under cells, fully bedded in mortar at starting course on footings where cells are not grouted.

B. Set cast-stone trim units in full bed of mortar with full vertical joints. Fill dowel, anchor, and similar holes.

1. Clean soiled surfaces with fiber brush and soap powder and rinse thoroughly with clear water.

2. Allow cleaned surfaces to dry before setting.

3. Wet joint surfaces thoroughly before applying mortar.

C. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness unless otherwise indicated.

D. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes

(other than paint) unless otherwise indicated.

3.6 MASONRY JOINT REINFORCEMENT

A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8 inch on exterior side of walls, 1/2 inch elsewhere. Lap reinforcement a minimum of 6 inches.

1. Space reinforcement not more than 16 inches o.c.

2. Space reinforcement not more than 8 inches o.c. in foundation walls and parapet walls.

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3. Provide reinforcement not more than 8 inches above and below wall openings and extending 12 inches beyond openings.

B. Interrupt joint reinforcement at control and expansion joints unless otherwise indicated.

C. Provide continuity at wall intersections by using prefabricated T-shaped units.

D. Provide continuity at corners by using prefabricated L-shaped units.

E. Cut and bend reinforcing units as directed by manufacturer for continuity at corners, returns, offsets, column fireproofing, pipe enclosures, and other special conditions.

3.7 ANCHORING MASONRY TO STRUCTURAL STEEL AND CONCRETE

A. Anchor masonry to structural steel and concrete where masonry abuts or faces structural steel or concrete to comply with the following:

1. Provide an open space not less than 1 inch wide between masonry and structural steel or concrete unless otherwise indicated. Keep open space free of mortar and other rigid materials.

2. Anchor masonry with anchors embedded in masonry joints and attached to structure.

3. Space anchors as indicated, but not more than 24 inches o.c. vertically and

36 inches o.c. horizontally.

3.8 CONTROL AND EXPANSION JOINTS

A. General: Install control and expansion joint materials in unit masonry as masonry progresses. Do not allow materials to span control and expansion joints without provision to allow for in-plane wall or partition movement.

B. Form control joints in concrete masonry using one of the following methods:

1. Fit bond-breaker strips into hollow contour in ends of CMUs on one side of control joint. Fill resultant core with grout and rake out joints in exposed faces for application of sealant.

2. Install preformed control-joint gaskets designed to fit standard sash block.

3. Install interlocking units designed for control joints. Install bond-breaker strips at joint. Keep head joints free and clear of mortar or rake out joint for application of sealant.

4. Install temporary foam-plastic filler in head joints and remove filler when unit masonry is complete for application of sealant.

3.9 LINTELS

A. Provide masonry lintels where shown and where openings of more than 12 inches for brick-size units and 24 inches for block-size units are shown without structural steel or other supporting lintels.

B. Provide minimum bearing of 8 inches at each jamb unless otherwise indicated.

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3.10 REINFORCED UNIT MASONRY INSTALLATION

A. Temporary Formwork and Shores: Construct formwork and shores as needed to support reinforced masonry elements during construction.

1. Construct formwork to provide shape, line, and dimensions of completed masonry as indicated. Make forms sufficiently tight to prevent leakage of mortar and grout. Brace, tie, and support forms to maintain position and shape during construction and curing of reinforced masonry.

2. Do not remove forms and shores until reinforced masonry members have hardened sufficiently to carry their own weight and other loads that may be placed on them during construction.

B. Placing Reinforcement: Comply with requirements in ACI 530.1/ASCE 6/TMS 602.

C. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough strength to resist grout pressure.

1. Comply with requirements in ACI 530.1/ASCE 6/TMS 602 for cleanouts and for grout placement, including minimum grout space and maximum pour height.

2. Limit height of vertical grout pours to not more than 60 inches.

3.11 FIELD QUALITY CONTROL

A. Testing and Inspecting: Contractor will engage special inspectors to perform tests and inspections and prepare reports. Allow inspectors access to scaffolding and work areas, as needed to perform tests and inspections. Retesting of materials that fail to meet specified requirements shall be done at Contractor's expense.

B. Inspections: Level 1 special inspections according to the "International Building

Code."

1. Begin masonry construction only after inspectors have verified proportions of site-prepared mortar.

2. Place grout only after inspectors have verified compliance of grout spaces and of grades, sizes, and locations of reinforcement.

3. Place grout only after inspectors have verified proportions of site-prepared grout.

C. Testing Prior to Construction: One set of tests.

D. Concrete Masonry Unit Test: For each type of unit provided, according to

ASTM C 140 for compressive strength.

E. Mortar Aggregate Ratio Test (Proportion Specification): For each mix provided, according to ASTM C 780.

F. Mortar Test (Property Specification): For each mix provided, according to

ASTM C 780. Test mortar for compressive strength.

G. Grout Test (Compressive Strength): For each mix provided, according to

ASTM C 1019.

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3.12 PARGING

A. Parge exterior faces of below-grade masonry walls, where indicated, in 2 uniform coats to a total thickness of 3/4 inch. Dampen wall before applying first coat and scarify first coat to ensure full bond to subsequent coat.

B. Use a steel-trowel finish to produce a smooth, flat, dense surface with a maximum surface variation of 1/8 inch per foot. Form a wash at top of parging and a cove at bottom.

C. Damp-cure parging for at least 24 hours and protect parging until cured.

3.13 REPAIRING, POINTING, AND CLEANING

A. Remove and replace masonry units that are loose, chipped, broken, stained, or otherwise damaged or that do not match adjoining units. Install new units to match adjoining units; install in fresh mortar, pointed to eliminate evidence of replacement.

B. Pointing: During the tooling of joints, enlarge voids and holes, except weep holes, and completely fill with mortar. Point up joints, including corners, openings, and adjacent construction, to provide a neat, uniform appearance. Prepare joints for sealant application, where indicated.

C. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove mortar fins and smears before tooling joints.

D. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows:

1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes or chisels.

2. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for comparison purposes. Obtain Architect's approval of sample cleaning before proceeding with cleaning of masonry.

3. Protect adjacent stone and nonmasonry surfaces from contact with cleaner by covering them with liquid strippable masking agent or polyethylene film and waterproof masking tape.

4. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsing surfaces thoroughly with clear water.

5. Clean concrete masonry by cleaning method indicated in NCMA TEK 8-2A applicable to type of stain on exposed surfaces.

3.14 MASONRY WASTE DISPOSAL

A. Salvageable Materials: Unless otherwise indicated, excess masonry materials are

Contractor's property. At completion of unit masonry work, remove from Project site.

B. Waste Disposal as Fill Material: Dispose of clean masonry waste, including excess or soil-contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill material as fill is placed.

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1. Crush masonry waste to less than 4 inches in each dimension.

2. Mix masonry waste with at least two parts of specified fill material for each part of masonry waste. Fill material is specified in Division 31 Section "Earth

Moving."

3. Do not dispose of masonry waste as fill within 18 inches of finished grade.

C. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, as described above, and other masonry waste, and legally dispose of off

Government's property as described in Division 1, Construction Waste

Management.

END OF SECTION 042200