2604 Specifications.pdf

02 41 00.1

COPYRIGHT ICA

DIVISION 2 - SITEWORK

SECTION 02 41 00 - DEMOLITION

KEMPER CENTER

2026 BUILDING ENVELOPE

RESTORATION PROJECT BID #2604

PART 1: GENERAL 1

1.1. WORK INCLUDED 3

a. Provide all labor, materials, services and incidentals necessary to perform the following work: 5

i. Carefully remove and store all materials slated for future reinstallation. 6

ii. Remove and dispose of existing materials to the extent shown on the Drawings. 7

1.2. REGULATORY REQUIREMENTS 9

a. The following regulatory requirements shall be followed: 11

i. Local, State and Regional Building Codes 12

ii. Occupational Safety and Health Administration (OSHA). 13

iii. United States Department of Transportation (US DOT). 14

iv. Environmental Protection Agency (EPA). 15

v. National Emission Standards for Hazardous Air Pollutants (NESHAP). 16

b. The Architect is not an advisor of asbestos-related issues. The Contractor shall consult the 17

Owner’s Asbestos Personnel for clarifications. 18

1.3. PROTECTION 20

a. When Work involves removal of masonry materials; the following minimum requirements shall be 22 enforced: 23

i. The Contractor shall exercise extreme caution and take all necessary precautions to limit 24 exposing his workmen or bystanders to any dangerous conditions. 25

ii. Protect all existing utilities against damage. Maintain existing utilities during demolition 26 operations. 27

iii. Protect passageways and maintain all exit ways to facilitate the safe passage of persons 28 around the area of demolition. Do not modify the facilities code compliant status in any 29 way that is not specifically addressed in this Project Manual. 30

iv. Provide interior and exterior shoring, bracing, or support as required to prevent movement, 31 settlement, or collapse of adjacent construction scheduled to remain. 32

v. Protect all remaining portions of the building, landscaping and other property not 33 scheduled for demolition. These areas shall be completely protected during demolition 34 and removal of debris. Any resulting damage shall be repaired or replaced to like-35 new condition by the Contractor responsible under the direction and approval of 36 the Owner and Architect. 37

vi. Protect area designated by the Owner and the Architect with necessary framing, plastic 38 sheet, or similar materials to prevent visible dust and debris from entering the building. 39

Remove dust and debris protection materials upon job completion. 40

vii. When the Work involves removal of building materials containing asbestos, notify the 41

Owner’s Asbestos Consultant immediately. 42

1.4. OCCUPANCY 44

a. The Owner shall occupy the building during demolition and construction and the facility shall remain 46 operational. 47

b. Coordinate all Work in advance with the Owner, the Owner’s onsite personnel and the Architect. 49

1.5. DUST CONTROL 51

a. The following minimum requirements will be enforced: 53

i. It is imperative that construction related dust be kept to a minimum during all work related 54 to this project. 55

02 41 00.2

DIVISION 2 - SITEWORK

SECTION 02 41 00 - DEMOLITION

KEMPER CENTER

PART 2: PRODUCTS 63

2.1. NOT USED. 65

PART 3: EXECUTION 67

3.1. LIMITED DEMOLITION 69

a. Remove existing construction as required to complete the installation of all new Work as shown or 71 specified. Refer to the Drawings for the extent of the existing construction that is to be removed. 72

b. Do not start demolition of existing materials when inclement weather is expected. 73

c. Refer to this section for requirements relating to protection of existing structure and property. 74

d. If during the course of the demolition Work portions of the existing structure are opened to the 75 weather, it shall be the Contractor’s responsibility to close such openings as required in a 76 weathertight manner at the end of each workday. 77

3.2. DISPOSAL OF MATERIALS 79

a. The Contractor shall remove all demolition material (that is not scheduled for reuse) from the 81

Owner’s site. 82

i. No prolonged accumulation of debris will be allowed. Debris shall be removed as it 83 accumulates. 84

ii. Sale of removed items on the site will not be allowed. 85

iii. Debris shall be transported on covered dumpsters or trucks. 86

iv. The site is to be broomed clean at the end of each working day. 87

b. No burning on site will be permitted. 88

END OF SECTION 90

DIVISION 04 - MASONRY

SECTION 04 01 20 - MASONRY RESTORATION

04 01 20.1

KEMPER CENTER

2026 BUILDING ENVELOPE

RESTORATION PROJECT BID #2604

PART 1: GENERAL 1

1.1. CONDITIONS OF THE CONTRACT 3

a. The conditions of the Contract (General, Supplementary, and Other Conditions) and the 5 requirements of Division 1 are hereby made a part of this Section. Applicable provisions of 6

Division 1 shall govern Work under this Section. 7

1.2. WORK INCLUDED 9

a. Unless otherwise specified, the Contractor shall furnish all materials, tools, equipment, apparatus, 11 transportation, labor and supervision required to furnish and install all the masonry as shown on 12 the Drawings and specified. 13

1.3. RELATED SECTIONS 15

a. Section 02 41 00 – Demolition 17

b. Section 07 62 00 – Sheet Metal Flashing and Trim 18

c. Section 07 62 15 – Copper Flashing and Trim 19

1.4. QUALITY ASSURANCE 21

a. There shall be no deviation made from this Specification, the Drawings and on all approved Shop 23

Drawings without prior written approval by the Architect. 24

i. Prior to covering newly installed Work with permanent materials, the Contractor shall 25 coordinate with the Architect to review all installed components for compliance with the 26 intent of the design as outlined in the drawings and specification of the Project Manual. In 27 addition, the Contractor shall certify that all work was completed in accordance with the 28

Project Manual. 29

b. All Work shall be performed by skilled journeyman masons and laborers who are considered 30 specialists in the field of masonry work similar to that required under this Contract. 31

c. Masons shall have a minimum of five (5) years experience in this type of work. 32

d. Samples (mock-ups) of typical masonry restoration work required by this Specification and as 33 shown on the Drawings shall be installed in unobtrusive areas using materials and methods 34 specified, and made available for viewing by the Architect and Owner. No related work shall 35 proceed until after mock-ups have been inspected and approved by the Architect. 36

e. Furnish sample (mock-up) panel 8’ long by 6’ high of the proposed masonry restoration work 37

(new, replaced masonry units and finished repointing) including color range, texture, bond, mortar 38 and workmanship. Erect mock-up panel in the presence of the Architect. Provide separate mock-39 up panels for each type of brick and mortar. Do not start the Work until the Architect has accepted 40 sample mock-up panel. Use mock-up panel(s) as standard of comparison for all masonry work 41 built of same material. Do not destroy or move the mock-up panel(s) until the Work is completed 42 and accepted by the Owner. 43

f. During the workday, should the weather conditions appear to be changing adversely, the Foreman 44 and crew shall take preventive measures to allow the work area to be closed to a weathertight 45 condition to avoid exposure to building, equipment, and materials. 46

g. Repair any Work, damaged by failure to provide proper and adequate protection, to its original 47 state to the satisfaction of the Owner, or remove and replace with new Work at the Contractor’s 48 expense. 49

h. Use of air entraining admixtures, chlorides, or nitrates, are not allowed and will be sufficient cause 50 to require removal and replacement of all masonry restoration work containing or treated with 51 these materials. 52

i. It will be the Architect’s prerogative to forbid the use of tools or methods that do not produce the 53 quality of work that is expected and to insist on the use of methods and tools, which will do the 54

Work properly. 55

j. Construct minimum 12 inch by 12-inch prisms for testing purposes as required by the Architect. 56

1.5. REFERENCES 58

a. References shall refer to the most recent standard. 60

i. Brick Institute of America (BIA). 61

ii. American Society for Testing and Materials (ASTM). 62

iii. Masonry Advisory Council (MAC). 63

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iv. Federal Specifications (FS). 64

1.6. SUBMITTALS 65

a. Submit product data and certificates for all replacement masonry units and mortar type. 67

b. A total of three (3) copies of each submittal are required. 68

c. Submit not less than two (2) individual samples of proposed replacement face bricks, showing 69 extreme variations in color and texture. 70

d. Mock-up of a minimum 4’ x 4’ repointing using new mortar to match existing for approval by 71

Owner and Architect. Mock-up area shall be adjacent to new repointing work. 72

e. Prism Test Reports (as required) 73

i. Test reports are to be submitted to the Architect for approval. 74

ii. Testing and reports are to be completed by an independent laboratory. 75

iii. Test reports shall show: 76

1. Age at test. 77

2. Storage conditions. 78

3. Dimensions of prism. 79

4. Compressive strength of individual prisms. 80

5. Coefficient of variation (v). 81

6. Ultimate compressive strength of masonry (F’m) that has been corrected for the 82 coefficient of variation (v) and the h/t of the prisms tested. 83

1.7. PRODUCT DELIVERY, STORAGE AND HANDLING 85

a. Deliver all materials in their original unopened containers with all markings intact. 87

b. Store replacement masonry units off ground to prevent contamination by mud, dust or materials 88 likely to cause staining or other defects. 89

c. Cover materials when necessary to protect from the elements. 90

d. Protect masonry reinforcing from the elements. 91

1.8. JOB CONDITIONS 93

a. Protection of Work 95

i. Wall covering: 96

1. During erection, cover top of wall with strong waterproof protective covering at 97 end of each day or shutdown. 98

2. Cover partially completed walls when Work is not in progress. 99

3. Extend protective coverings a minimum of 24 inches (610 mm) down both sides. 100

4. Hold protective coverings securely in place. 101

ii. Load application: 102

1. Do not apply uniform floor or roof loading for at least 12 hours after building 103 masonry columns or walls. 104

2. Do not apply concentrated loads for at least three (3) days after building masonry 105 columns or walls. 106

b. Staining 107

i. Prevent grout or mortar from staining the face of the masonry to be left exposed. 108

1. Immediately remove grout or mortar in contact with the face of such masonry. 109

2. Protect all sills, ledges, and projections from droppings of mortar. 110

3. Protect door and window jambs and heads from staining or damage. 111

c. Cold Weather Protection 112

i. Preparation: 113

1. If ice or snow has formed on replacement masonry bed, remove by carefully 114 applying heat until the top surface is dry to the touch. 115

2. Remove all replacement masonry that is frozen or damaged. 116

ii. Products: 117

1. When brick suction exceeds the initial rate of absorption, sprinkle with heated 118 water. 119

A. When units are 32°F (0°C) heat water above 70°F (21°C). 120

B. When units are below 32°F (0°C) heat water above 130°F 121

(54°C). 122

2. Use only dry replacement masonry units. 123

3. Do not use wet or frozen replacement masonry units. 124

d. Construction requirements while Work is progressing: 125

i. Air temperature 40°F (4°C) to 32°F (0°C): 126

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1. Heat mixing water to produce mortar temperatures between 40°F (4°C) and 127

120°F (49°C). 128

ii. Air temperature 32°F (0°C) to 20°F (-7°C): 129

1. Heat sand or mixing water to produce mortar temperatures between 40°F (4°C) 130 and 120°F (49°C). 131

2. Maintain temperatures of mortar on board above freezing. 132

3. Use salamanders or other heat sources on both sides of walls under construction 133 as required to properly protect replacement masonry from freezing. 134

4. Use windbreaks when wind is in excess of 14 MPH. 135

5. Air temperatures 20°F (-7°C) and below: 136

A. Heat mixing water to produce mortar temperatures between 137

40°F (4°C) and 120°F (49°C). 138

B. Provide enclosures and auxiliary heat to maintain temperature above 139

32°F (0°C). 140

C. Minimum temperature of new masonry units is to be 20°F (-7°C). 141

iii. Protection requirements for completed replacement masonry and replacement masonry 142 not being worked on. 143

1. Mean daily air temperature 40°F (4°C) to 32°F (0°C): 144

A. Protect replacement masonry from rain or snow for 24 hours with 145 weatherproof covering. 146

2. Mean daily air temperature 32°F (0°C) to 25°F (-4°C): 147

A. Completely cover replacement masonry with weatherproof covering for 148

24 hours. 149

3. Mean daily air temperature 25°F (-4°C) to 20°F (-7°C): 150

A. Completely cover replacement masonry with insulating blankets or 151 equal protection for 24 hours. 152

4. Mean daily air temperature 20°F (-7°C) and below: 153

A. Maintain replacement masonry temperature above 32°F (0°C) for 24 154 hours by constructing a sufficient enclosure with supplementary heat, 155 electric heating blankets, infrared lamps or approved equal. 156

1.9. GUARANTEES, WARRANTIES, CERTIFICATES 158

a. Materials and/or workmanship shall be guaranteed against defects for a period of two (2) years 160 from the date of Substantial Completion as established by the Architect. 161

PART 2: PRODUCTS 163

2.1. ACCEPTABLE MANUFACTURERS 165

a. Provide products by Manufacturers specified herein which meet or exceed standards as set forth in 167 this Section. No products specified or approved shall contain asbestos. 168

b. All materials shall be new unless noted otherwise. 169

2.2. MATERIALS 171

a. Replacement Brick (as required): Cream City brick units (reclaimed) to match size and color of 173 existing masonry. Final size and color selection shall be by Architect. 174

b. Structural Angle Steel Lintels: hot dipped galvanized ASTM A36 steel. 175

c. Through-wall Flashing: “Polyguard 400 Thru Wall Flashing,” a 40 mil, self-adhering, self-healing 176 membrane consisting of a rubberized asphalt waterproofing element, bonded to a strong 177 polyethylene film top surface, as manufactured by Polyguard Products Inc, Ennis, Texas, or “Perm-178

A-Barrier Wall Flashing,” 40-mil, self-adhering membrane wall flashing as manufactured by W.R. 179

Grace & Co., Columbia, Maryland, or approved equal. 180

d. Through-wall Copper Flashing Drip Edge: See Copper Flashing and Trim for type and thickness, 1-181

5/8” wide with a 1/2” 90-degree bend at one end. 182

e. Lime: St. Astier NHL 3.5 (natural hydraulic lime) by TransMineral USA, Inc., Petaluma, California, 183

(707) 769-0352. 184

f. Water: Potable, fresh, clean, clear and free from injurious amounts of sewage, oil, acid, alkali, 185 salts, organic matter or other detrimental substances. 186

g. Color Admixture (if required for matching): Non air-entraining pure mineral pigment which is light 187 fast, lime proof, and weatherproof, such as DCS mortar colors by DCS Color and Supply Company 188 of Milwaukee, Wisconsin or approved equal. 189

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h. Reinforcement: Standard masonry reinforcement, cold drawn steel wire conforming to ASTM A82 190 or welded steel wire fabric conforming to ASTM A185. 191

i. Anchors and Ties: Minimum 20 ga. galvanized, type and spacing as shown on the Drawings. 192

j. Cement Base Waterproofing: Thoroseal by Standard Dry Wall Products, Inc. of Miami, Florida or 193 approved equal. 194

k. Weep Vent: "Mortar Net Weep", 90% open polyester mesh, color to match mortar, as manufactured 195 by Mortar Net USA. 196

l. Weeps: “# 341 Series Round Plastic Weep Holes,” medium density polyethylene, 3/8” outside 197 diameter (O.D.) by 4” long with stainless steel screen insert and double cotton wick, as 198 manufactured by H & B Illinois, Chicago, Illinois. 199

m. Other Materials: All other materials not specifically described but required for a complete and 200 proper installation of the Work in this Section, shall be selected by the Contractor subject to the 201 approval of the Architect. 202

2.3. BRICK REPAIR MATERIAL 204

A. Substitute Brick Repair Material: Must use only mineral-based, single component products that 206 contain natural binders; no synthetic polymers or additives are permitted. Substitute brick material 207 must be pre-mixed in a quality controlled factory, with only the addition of water required at the site 208 prior to installation. 209

B. Acceptable material: 210

1. Jahn M100 Terra Cotta and Brick Repair Mortar, Cathedral Stone Products, Jessup, 211

Maryland 212

C. Brick Repair Material shall be custom colored to match the existing brick and produced in a quality 213 controlled factory environment. The contractor will be expected to keep a stock of a range of 214 custom colors that is equal in number to the number of colors in the custom brick blend (up to 6). 215

D. No field mixing of color pigments into the repair materials is permitted on-site. 216

E. No color staining of existing brick requiring repairs or newly applied repair materials is permitted. 217

F. Apply substitute brick materials to areas no more than 2 inches in depth and 3 inches wide or as 218 specifically allowed by the manufacturer. 219

2.4. ALL MORTAR MATERIALS 221

A. The basis of the mortar for this project shall be: 223

1. St. Astier Natural Hydraulic Lime NHL 3.5, distributed by TransMineral USA. 224

2. Pigment – None. 225

3. Sand – Sand shall be clean and uncontaminated by clay/silt and shall be a combination of 226 blending sand and torpedo sand, such as by Thelen Materials, Antioch, IL. 227

4. Final mortar mix shall be determined in the field under the direction of the Architect. For 228 the purposes of this bid use the following lime/sand ratio (1:2.5) by volume. 229

B. All mortar shall be prepared and placed in accordance with the Department of the Interior National 230

Park Service Cultural Resources Preservation Briefs 2, “Repointing Mortar Joints in Historic 231

Masonry Buildings” (Revised Edition October 1998), and in compliance with the guidelines set forth 232 by the Secretary of the Interior’s Standards. 233

C. The mortar shall match the original in color, grain size and texture. The compressive strength of the 234 repointing mortar shall be equal or less than the compressive strength of the original mortar and 235 surrounding brick. The replacement mortar shall contain approximately the same ingredient 236 proportions of the original mortar and shall have a water vapor transmission rate greater than all 237 adjacent masonry. 238

D. All replacement mortar ingredients and mortar formulations have been established from test data 239 gathered from the original materials sampled from site, and from performance data observed in the 240 field. 241

E. Mixing of individual mortar ingredients at the construction site will be permitted. 242

F. Repointing mortars may be pre-blended (not including water) in single containers in a factory-243 controlled environment, however the architect shall have FULL authority to reject any process that 244 in his sole discretion will not meet the intent of this specification. 245

G. All ingredients will be converted from volume measurements to weight measurements to ensure 246 quality production of the mortar. This must be accomplished prior to any mix manufacture with the 247

Natural Hydraulic Lime manufacturer. 248

H. All mortar materials delivered to the site shall be tested to confirm specification compliance before 249 mortar is installed in the wall. 250

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2026 BUILDING ENVELOPE

RESTORATION PROJECT BID #2604

PART 3: EXECUTION 254

3.1. EXAMINATION 256

a. The Masonry Contractor shall have the sole responsibility for the accuracy of all measurements 258 and for the estimate of material quantities required and necessary to satisfy the requirements of the 259

Drawings and these Specifications. 260

3.2. SEQUENCING/SCHEDULING 262

a. Perform only as much Work as can be restored to a weathertight condition each day or before 264 showers commence. 265

b. All related flashing work shall be completed each day. 266

c. All other work required for a complete and proper installation per the Drawings and these 267

Specifications that constitute a complete and proper installation shall be completed each day 268

3.3. SUBSTRATE PREPARATION 270

a. Remove all existing materials as specified to perform the Work. 272

b. Exterior masonry surfaces to remain in place shall be meticulously inspected for cracks or defects. 273

c. Any mortar joint that is loose, porous, crumbled, cracked, badly weathered (deeper than 1/8” 274 behind masonry surface), un-bonded to adjacent masonry units, or a potential source of leakage 275 shall be deemed defective. All spalled, cracked, broken, or otherwise defective brick shall be 276 removed and replaced using brick and mortar as specified herein. 277

d. Included in the definition of defective shall be cracked joints that have been sealed. 278

e. Any missing brick and/or mortar joints that lack mortar or has lost bond, is spalled, or broken, which 279 can be detected from a maximum distance of ten (10) feet under clear skies during daylight times 280 by an observer with normal vision, shall be deemed profusely defective for this Project. 281

f. All cracks, defective, or profusely defective mortar joints shall be cut out or ground out the full width 282 of the joint to a minimum depth of 3/4”. 283

g. Where mortar is broken or loose beyond a depth of 3/4”, remove unsound mortar to where firm 284 solid mortar is encountered prior to pointing. All joints must be cut clean of unsound mortar 285 material in a square manner full depth of cut. Furrow shaped joints will not be acceptable. 286

h. The cutting out of joints shall be done with suitable tools, either hand tools or mechanical 287 equipment, in such a manner as will not loosen adjacent joints or injure the edges or corners of the 288 replacement masonry units. Where the mortar is tightly bonded at one side of the joint, and if the 289 contour permits, the cutting shall be done with portable electric grinders with abrasive wheels to 290 minimize spalling at the edges of the replacement masonry units. 291

i. After the joint has been cut out, all loose material shall be removed by brush, air jet, or water 292 stream. Following this cleaning, the joint shall be thoroughly moistened. The joint shall be damp, 293 but without free water on the surface at the time of pointing. 294

j. Isolated bricks with cracks larger than 1/32” shall be deemed defective and shall be replaced. 295

k. Facing brick, which are spalled 1/16” or greater in depth over 10 percent or more of the face area 296 shall be removed and replaced. 297

l. Wetting Brick: Wet brick with absorption rates in excess of 30 gal. / 30 in2 / minute (30 gal. / 194 298 cm2 / minute) determined by ASTM C67, so that the rate of absorption when laid does not exceed 299 this amount. Recommended procedure to insure that bricks are nearly saturated when laid is to 300 place a hose on the pile of brick until the water runs from the pile. This should be done one day 301 before the brick are to be used. In extremely warm weather, place the hose on the pile several 302 hours before the bricks are to be used. 303

3.4. GENERAL ERECTION REQUIREMENTS 305

a. Pattern Bond 307

i. Lay new replacement masonry in 1/2 running bond or match existing. 308

ii. Bond unexposed replacement masonry units wythe-to-wythe by lapping at least 2” (51 309 mm). 310

b. Joining of Work 311

i. Where fresh replacement masonry joins partially set masonry: 312

1. Remove loose brick and mortar. 313

2. Clean and lightly wet exposed surface of set masonry. 314

ii. Stop off horizontal run of masonry by racking back 1/2 length of unit in each course. 315

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iii. Toothing is not permitted except upon written acceptance of the Architect. 316

c. Tooling 317

i. Tool exposed joints when “thumb-print” hard with a round jointer, slightly larger than width 318 of joint. 319

ii. Trowel-point or concave-tool exterior joints below grade. 320

iii. Following at the proper interval, all new mortar joints shall be compressed and tooled with 321 a smooth rounded iron of selected width to produce a smooth, dense surface, very slightly 322 concave, or similar depth as typically existing, and tightly pressed against the edges of the 323 masonry units. Complete by gently brushing the face of the joint to match existing. 324

d. Flashing 325

i. Clean surface of masonry smooth and free from projections that might puncture flashing 326 material. 327

1. Install new thru-wall flashings as shown on the Drawings. 328

2. Install thru-wall flashings per the Manufacturers recommendations. 329

e. Weep Holes 330

i. Provide weep holes in head joints in first course immediately above all flashings. 331

ii. Maximum spacing: 24 in. (610 mm) on-center. 332

iii. Keep weep holes and area above through-wall flashing free of mortar drippings. 333

f. Sealant Recesses 334

i. Leave joints around outside perimeters of exterior doors, window frames and other wall 335 openings. 336

1. Depth: Uniform 3/4” (19 mm). 337

2. Width: 1/4” (6.4 mm) to 3/8” (9.5 mm). 338

g. Movement Joints 339

i. Locate as shown on the Drawings. 340

ii. Keep clean from all mortar and debris. 341

h. Cutting Brick 342

i. Cut bricks with motor driven saw or other methods that provide cuts that are straight and 343 true. 344

i. Mortar Joint Thickness 345

i. Lay brick with joints to match existing but not to exceed 1/2” (12.7 mm). 346

j. Construction Tolerances 347

i. Maximum variation from plumb in vertical lines and surfaces of wall arises: 348

1. 1/4” (6.4 mm) in 10 ft. (3 m). 349

2. 3/8” (9.6 mm) in a story height not to exceed 20 ft. (6 m). 350

3. 1/2” (12.7 mm) in 40 ft. (12 m) or more. 351

ii. Maximum variation from plumb for external corners, expansion joints and other 352 conspicuous lines: 353

1. 1/4” (6.4 mm) in any story or 20 ft. (6 m) maximum. 354

2. 1/2” (12.7 mm) in 40 ft. (12 m) or more. 355

iii. Maximum variation from level of grades for exposed lintels, sills, parapets, horizontal 356 grooves and other conspicuous lines: 357

1. 1/4” (6.4 mm) in any bay or 20 ft. (6 m). 358

2. 1/2” (12.7 mm) in 40 ft. (12 m) or more. 359

iv. Maximum variation from plan location or related portion of walls: 360

1. 1/2” (12.7 mm) in any bay or 20 ft. (6 m). 361

2. 3/4” (19 mm) in 40 ft. (12 m) or more. 362

v. Maximum variation in cross-sectional dimensions of columns and thickness of walls from 363 dimensions shown on the Drawings: 364

1. Minus 1/4” (6.4 mm). 365

2. Plus 1/2” (12.7 mm). 366

3.5. MORTAR MIXES 368

a. All equipment for mixing, transporting and applying mortar shall be clean and free from hardened 370 mortar, dirt, ice, or other foreign matter. 371

b. Measure materials for mortars by volume, in a manner whereby proportions can be controlled 372 within five percent. The proportions listed hereinafter for lime mortars are lime and sand, 373 respectively by volume. The proportions are listed only as a sample for the required type mortar 374 and shall be modified as necessary, within tolerances, to suit the particular masonry sand being 375 used. 376

c. Mix lime and masonry sand dry. Add water and bring to the consistency of “brown sugar” for use. 377

Mix materials until evenly distributed throughout the batch and the mixture is uniform in color and 378

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consistency. No antifreeze ingredient or similar such contaminant will be tolerated. 379

d. Repointing and brick replacement mortar shall be 1-part St. Astier NHL 3.5 (natural hydraulic lime) 380 and 2.5 parts natural, well-graded sand. The mortar shall be pigmented to match existing using a 381 buff oxide powdered pigment by Dynamic Color Solutions. 382

3.6. REPOINTING 384

a. See “3.03 Substrate Preparation” for repointing general preparation requirements. 386

b. With joint damp, completely fill with mortar. 387

c. Following at the proper interval, the joint shall be compressed and tooled with a smooth iron of 388 selected width to produce a smooth, dense surface, raked 1/16” from surface of brick or similar 389 depth as typically existing, and tightly pressed against the edges of the masonry units. Complete 390 by gently brushing the face of the joint to match existing adjacent rough texture. 391

d. All necessary protection shall be provided to prevent damage to the existing roofs. 392

3.7. CLEANING 394

a. Cut out any defective joints and holes in exposed masonry and re-point with mortar. 396

b. Clean all exposed unglazed masonry. 397

i. Apply cleaning agent to sample wall area of 20 sq. ft. (2 sq. m) in location acceptable to 398 the Architect. 399

ii. Do not proceed with cleaning until the Architect approves sample area. 400

iii. Clean initially with stiff brushes and water. 401

iv. When cleaning agent is required: 402

1. Follow brick Manufacturer’s recommendations 403

2. Do not use acid solutions to clean light colored brick. 404

3. Thoroughly wet surface of masonry on which no green efflorescence 405

(staining) appears. 406

4. Scrub with acceptable cleaning agent. 407

5. Immediately rinse with clean water. 408

6. Do small sections at a time. 409

7. Work from top to bottom. 410

8. Protect all sash, metal lintels and other corrodible parts when masonry is 411 cleaned with an acid solution. 412

9. Remove green efflorescence (staining) in accordance with brick 413 manufacturer’s recommendations and BIA “Technical Notes 23 Series.” 414

END OF SECTION 416

SECTION 04 01 40 - LIMESTONE RESTORATION

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2026 BUILDING ENVELOPE

RESTORATION PROJECT BID #2604

PART 1: GENERAL 1

1.1. CONDITIONS OF THE CONTRACT 3

a. The conditions of the Contract (General, Supplementary, and Other Conditions) and the 5 requirements of Division 1 are hereby made a part of this Section. Applicable provisions of Division 6

1 shall govern Work under this Section. 7

1.2. WORK INCLUDED 9

a. Unless otherwise specified, the Contractor shall furnish all materials, tools, equipment, apparatus, 11 transportation, labor and supervision required to furnish and install all the limestone as shown on 12 the Drawings and as specified herein. 13

1.3. RELATED SECTIONS 15

a. Section 02 41 00 – Demolition 17

b. Section 04 01 20 – Masonry Restoration 18

c. Section 07 62 00 – Copper Flashing and Trim 19

d. Section 07 62 15 – Sheet Metal Flashing and Trim 20

1.4. QUALITY ASSURANCE 22

a. There shall be no deviation made from this Specification without prior written approval by the 24

Architect. 25

b. All proposed shoring plans and details must be approved by the Architect and in place before any 26 load bearing limestone and brick back-up demolition work can proceed. All shoring systems shall 27 be designed by the Contractor who shall be ultimately responsible for same. 28

c. All limestone restoration work shall be performed by skilled journeymen tradesmen including but 29 not limited to, stonemasons, masons, repointers, concrete installers / finishers, roofers, and 30 laborers who are considered specialists in the field of the work specified in this Section. 31

d. Journeymen tradesmen shall have a minimum of five (5) years experience in the specified type of 32 work. 33

e. During the workday should the weather conditions appear to be changing adversely, the Contractor 34 shall take preventative measures to protect any unfinished Work that was to be performed that day 35 and to allow adequate time for the work area to be properly closed to a watertight condition to avoid 36 exposure to the building interior. 37

f. Repair any Work damaged by failure to provide proper and adequate protection, to its original state 38 to the satisfaction of the Owner, or remove and replace the defective Work with new at the 39

Contractor’s expense. 40

g. Use of air entraining mixtures, chlorides, or nitrates is not to be mixed in with the mortar. Any use 41 of these materials in the mortar will be sufficient cause to require removal and replacement of 42 same. 43

h. It will be the Architect’s prerogative to forbid the use of tools or methods that do not produce the 44 quality of work that is expected and to insist on the use of tools and methods, which will do the 45

Work properly. 46

i. The Architect reserves the right to approve the material supplier for the new materials specified in 47 this Section. 48

j. All material and workmanship quality shall be in accordance with current industry standards and 49 practices in conformance with the organizations outlined in 1.5. REFERENCES below. 50

1.5. REFERENCES 52

a. References shall refer to the most recent industry standard and recommendations as represented 54 by the organizations listed below. 55

i. Indiana Limestone Institute of America (ILI). 56

ii. Brick Institute of America (BIA). 57

iii. Masonry Advisory Council (MAC). 58

iv. American Society for Testing and Materials (ASTM). 59

v. Federal Specifications (FS). 60

1.6. SUBMITTALS 62

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a. Provide all data and sample materials in strict conformance with SECTION 01 33 00 – 64

SUBMITTAL PROCEDURES, and as specified below. 65

b. Each submittal shall be clearly marked with the specific Specification Section, page number, and 66 item designation that it represents. Each submittal shall be presented in the order that it is 67 outlined in the PROJECT MANUAL – TABLE OF CONTENTS. Failure to do so may result in 68 immediate rejection of the submittal. 69

c. A total of three (3) copies of each submittal (data sheets) are required. 70

d. Provide the following unless directed otherwise by the Architect: 71

i. Limestone: 72

1. Sample areas (mock-ups) of typical limestone restoration including, limestone 73 replacement, limestone repairs, limestone repointing, and limestone cleaning as 74 required, as shown on the Drawings, and per this Specification shall be installed 75 as directed by the Architect using materials and methods specified. The mock-76 ups shall be made accessible for viewing by the Architect and the Owner. No 77 other Work shall proceed until mock-ups have been inspected and approved by 78 the Architect. 79

2. Furnish sample replacement limestone for approval as deemed necessary by the 80

Architect showing the proposed size, profile, grade, color and finish. 81

3. Provide written verification from the limestone provider that they can supply the 82

Project with new replacement limestone as specified herein. 83

ii. Provide submittal information and Shop Drawings (as applicable) for the following items as 84 specified in PART 2 – PRODUCTS: 85

1. Shims: Data sheets and samples. 86

2. Strap Anchors: Data sheets and samples. 87

3. Dowels (Pins): Data sheets and samples. 88

4. Hanging Limestone Anchors: Data sheets and samples. 89

5. Back-up Clay Masonry: Data sheets and samples. 90

6. Pre-blended Mortar: Data sheets. 91

7. Stone Clip Angle: Data sheets and samples. 92

8. Masonry Anchor: Data sheets and samples. 93

9. Weeps: Data sheets and samples. 94

10. Limestone Restoration Mortar: Data sheets and field sample. 95

11. Limestone Cleaning Detergent: Data sheets, written description of proposed 96 cleaning procedure and field sample. 97

1.7. PRODUCT DELIVERY, STORAGE AND HANDLING 99

a. Deliver all materials in their original unopened packages and/or containers with all markings intact. 101

b. All materials must be stored in a dry place or otherwise protected from water or extreme humidity. 102

c. Stack materials on pallets at least 4 inches above the ground and cover with a breathable covering, 103 such as canvas. 104

d. Store all materials in the manner and temperature range recommended by the Manufacturer. 105

e. Do not store or transport materials on the roof in a manner that may exceed the live load capacity 106

(30 PSF) of the roof deck system and/or the building structural system. The Architect, during 107 routine inspections, may make recommendations as to loading. 108

f. Do not transport or store materials on the existing roof surface without adequate protection. The 109

Architect, during routine inspections, may make recommendations as to existing roof protection. 110

1.8. GUARANTEES, WARRANTIES, CERTIFICATES 112

a. The Contractor and the material Manufacturer’s shall guaranty both material and/or workmanship, 114 and warrant the performance of all items specified in this Section for a period of two (2) years from 115 the date of Substantial Completion as determined by the Architect. 116

PART 2: PRODUCTS 118

2.1. ACCEPTABLE MANUFACTURERS 120

a. Provide Products by Manufacturer’s specified herein, which meet or exceed standards as set forth 122 in this Section. No products specified or approved shall contain asbestos. 123

b. All materials shall be new unless noted otherwise on the Drawings and Specifications. 124

c. No material substitutions will be accepted unless specified as “or approved equal,” and approved in 125 advance by the Architect. 126

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RESTORATION PROJECT BID #2604

2.2. MATERIALS 129

a. Replacement WT Limestone: All replacement limestone shall be “Bedford” Indiana Oolitic limestone 131 as quarried in Lawrence County, Indiana. Replacement limestone shall match existing in size, 132 profile, grade, color, and finish. 133

b. Shims: 2 inch by 4 inch by 1/16 inch, 1/8 inch, and 1/4 inch, plastic shims as manufactured by 134

Racknow Polymers and distributed by Lance Construction Supplies, Inc., Chicago, Illinois, or 135 approved equal. 136

c. Strap Anchors: “No. 141 U-Type Stone Anchor,” 8 inches long by 1-1/4 inch wide with a 7/8 inch 137 bend (Interior dimension). 16 gauge or 0.625 inch (1/16 inch) thickness, stainless steel conforming 138 to ASTM A 167, AISI Type 304, as manufactured by Heckmann Building Products, Inc., Melrose 139

Park, Illinois. 140

d. Dowels (Pins): 3/8 inch diameter by 4 inch long, smooth finish, stainless steel, conforming to 141

ASTM 267, AISI Type 304 or 316. 142

e. Hanging Limestone Anchors: “Liebig Superplus 14” stainless sheet, self undercutting, torque 143 controlled, stone anchor, minimum 1-1/2 inch embedment, as manufactured by Liebig International, 144

Inc., or approved equal. 145

f. Clay Masonry: Standard (3-5/8 inch by 2-1/4 inch by 8 inch) severe weathering (SW), red extruded 146 brick as manufactured by Belden Brick Company, Canton, Ohio, or approved equal. 147

g. Mortar: Mortar mixture ratio 1:2.5 by volume. 148

h. Lime: St. Astier NHL 3.5 (natural hydraulic lime) by TransMineral USA, Inc., Petaluma, California, 149

(707) 769-0352. 150

i. Sand (as required): Clean, sharp, free from loam, silt, vegetable matter, salts, and other injurious 151 substances, conforming to ASTM C144 standard. 152

j. Sand: Clean, sharp, free from loam, silt, vegetable matter, salts, and other injurious substances, 153 conforming to ASTM C144 standard. Such as by Mandt Sandfill, 2079 County Hwy MM, Fitchburg, 154

Wisconsin, 53575. Match existing in size and color. 155

k. Water: Potable, fresh, clean, clear and free from injurious amounts of sewage, oil, acid, alkali, 156 salts, organic matter or other detrimental substances. 157

l. Color Admixture (if required for matching): Non air-entraining pure mineral pigment which is light 158 fast, lime proof, and weatherproof, such as DCS mortar colors by DCS Color and Supply Company 159 of Milwaukee, Wisconsin or approved equal. 160

m. Stone Clip Angle: Type 304 or 316 stainless steel stone clip angle. Length (long leg) varies – field 161 measure. 2” high short leg. 1/8” thick. 7/16” diameter slotted hole at short leg as shown on the 162

Drawings. 163

n. Masonry Anchor: “BL-523 Brass Expansion Bolt”, 7/16” outside diameter by 2” long, type 304 164 stainless steel masonry anchor as manufactured by H & B Illinois, Chicago, Illinois, or approved 165 equal. 166

o. Masonry Anchor: “Dur-O-Wal No. DA5410 / DA5610”, 7/16” outside diameter by 2” long, type 304 167 stainless steel masonry anchor as manufactured by Dayton Superior, Dayton, Ohio, or approved 168 equal. 169

p. Weeps: “# 341 Series Round Plastic Weep Holes,” medium density polyethylene, 3/8” outside 170 diameter (O.D.) by 4” long with stainless steel screen insert and double cotton wick, as 171 manufactured by H & B Illinois, Chicago, Illinois. 172

q. Limestone Restoration Mortar: “Mimic” trowel applied, color matched, single component limestone 173 repair mortar as manufactured by Conproco Corporation, or approved equal. 174

r. Limestone Restoration Mortar: Jahn M70 Repair Mortar, Cathedral Stone Products, Jessup, 175

Maryland. 176

s. Limestone Cleaning Detergent (as required): “Stone Soap Ultra” water-based cleaner, pH neutral, 177 containing no abrasives, acids, alkalis, salts, phosphates, d-liminene, artificial colors, fragrances, or 178 preservatives, as manufactured by Stone Technologies Corp, or approved equal. 179

t. Through Wall Flashing Membrane and Cap Flashing Membrane (At Coping Stones): “Perm-A-180

Barrier Wall Flashing,” 40-mil, self-adhering membrane wall flashing as manufactured by W.R. 181

Grace & Co., Columbia, Maryland, or approved equal. 182

u. Through-wall Flashing Drip Edge: “Preformed Stainless Steel Drip Edge.” 28 gauge (15 mils thick), 183

1-5/8” wide with a 3/8” bend at one end made of Type 304 grade, dull finish stainless steel in 184 conformance with ASTM A 167, as manufactured by Polyguard Products inc, Ennis, Texas, or 185 approved equal. 186

v. Other Items: All other materials not specifically described but required for a complete and proper 187 installation of the Work in this Section, shall be selected by the Contractor subject to approval by 188 the Architect. 189

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PART 3: EXECUTION 191

3.1. EXAMINATION 193

a. The Contractor shall have the sole responsibility for the accuracy of all measurements and for the 195 estimate of material quantities required and necessary to satisfy the requirements of these 196

Specifications. 197

3.1. SEQUENCE/SCHEDULING 199

a. During demolition, as well as rehabilitation operations, restore all areas to a weathertight condition 201 each day and/or before inclement weather commences. 202

b. The Contractor shall not proceed with the Work until all unsatisfactory conditions detrimental to the 203 proper and timely completion of the Work have been corrected. 204

3.2. MORTAR MIXES 206

a. All equipment for mixing, transporting and applying mortar shall be clean and free from hardened 208 mortar, dirt, ice, or other foreign matter. 209

b. Measure materials for mortars by volume, in a manner whereby proportions can be controlled 210 within five percent. The proportions listed hereinafter for lime mortars are lime and sand, 211 respectively by volume. The proportions are listed only as a sample for the required type mortar 212 and shall be modified as necessary, within tolerances, to suit the particular masonry sand being 213 used. 214

c. Mix lime and masonry sand dry. Add water and bring to the consistency of “brown sugar” for use. 215

Mix materials until evenly distributed throughout the batch and the mixture is uniform in color and 216 consistency. No antifreeze ingredient or similar such contaminant will be tolerated. 217

d. Repointing and brick replacement mortar shall be 1-part St. Astier NHL 3.5 (natural hydraulic lime) 218 and 2.5 parts natural, well-graded sand. The mortar shall be pigmented to match existing using a 219 buff oxide powdered pigment by Dynamic Color Solutions. 220

3.3. EXISTING LIMESTONE REMOVAL 222

a. Carefully remove all existing limestone that is shown to be removed and replaced as shown on the 224

Drawings. 225

b. Extreme caution shall be implemented when grinding and/or cutting out the existing mortar joints as 226 to not damage the existing limestone. 227

c. Existing limestone shall be removed manually, by mobile hoist, or by crane, as job conditions 228 require, and as deemed necessary by the Contractor. Note: It is not recommended that Lewis pins 229 be used for stones less than 3-1/2 inches thick. 230

d. As determined by the Architect, existing limestone slated for removal and replacement that is 231 damaged due to mishandling by the Contractor shall be replaced with new or repaired to its original 232 state at the Contractor’s expense. 233

e. Removed limestone shall be stored in predetermined “graveyard” locations as directed by the 234

Architect. All existing limestone stored on the roof of the building shall not exceed existing live 235 loads as specified in 1.7.E. 236

3.4. BRICK BACK-UP DEMOLITION 238

a. Remove all existing brick back-up as shown on the Drawings and as required for a complete and 240 proper installation of the Work in this Section. 241

3.5. LIMESTONE AND BRICK BACK-UP REPLACEMENT 243

a. Install limestone in strict accordance with Indiana Limestone Institute of America (ILI) specifications 245 and recommendations. 246

a. Install brick back-up in strict accordance with Brick Institute of America (BIA), and Masonry 247

Advisory Council (MAC) specifications and recommendations. 248

b. When installing limestone, hold the installation mortar back 3/4 inches as shown on the Drawings. 249

c. During erection, cover top of wall with strong waterproof protective coverings at end of each day or 250 shutdown. 251

d. Cover partially completed walls with waterproof protective covering when Work is not in progress. 252

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e. Extend waterproof protective covering a minimum of 24 inches down both sides. 253

f. Hold waterproof protective covering securely in place. 254

g. Do not apply uniform floor or roof loading for at least 12 hours after installing load supporting 255 limestone and brick back-up. 256

h. Do not apply concentrated loads for at least three (3) days after installing load supporting limestone 257 and brick back-up. 258

i. Prevent mortar from staining the face of the limestone. 259

j. Immediately remove mortar in contact with the face of the limestone. 260

k. Protect all windows, doors, sills, ledges, and projections from mortar droppings, staining, or 261 damage. 262

l. If ice or snow has formed on limestone or brick back-up bed, remove by carefully applying heat 263 until the top surface is dry to the touch. 264

m. Remove all limestone and brick back-up that was damaged due to freezing. 265

n. Do not install limestone or brick back-up units when the mean air temperature is below 20°F. 266

o. When limestone and brick back-up suction exceeds the initial rate of absorption, sprinkle with 267 heated water as follows. When units are 32°F, heat water above 70°F. When units are below 268

32°F, heat water above 130°F. 269

p. Use only dry limestone and brick back-up units. 270

q. Do not use wet or frozen limestone and brick back-up units. 271

r. If the air temperature range is 20°F to 40°F, heat mortar to a temperature between 40°F and 120°F. 272

s. Maintain temperatures of mortar on board above freezing at all times. 273

t. Use salamander-type heaters or other heat sources on both sides of walls under construction when 274 temperatures are below 32°F. 275

u. Use windbreaks when winds are in excess of 15 MPH. 276

v. When the mean air temperature range is 32°F to 40°F, protect limestone and/or brick back-up from 277 rain or snow for 24 hours by covering with a strong waterproof protective membrane. 278

w. When the mean air temperature range is 20°F to 32°F, completely cover limestone and/or brick 279 back-up with supplementary heat and/or insulating blankets as required to maintain the new Work 280 at or above 32°F. 281

x. Install finish mortar at all limestone units as shown on Drawings and as follows. With joint damp, 282 completely fill with mortar placed in three (3) layers (lifts) firmly pressed in place. The joint shall 283 then be compressed and tooled with a smooth rounded iron of selected width to produce a smooth, 284 dense surface, very slightly concave, tightly pressed against the edges of the limestone. All new 285 limestone mortar joints shall be uniform in appearance. 286

y. Install new finish mortar per Item 4) through 5) as described below in “D. Repointing:” 287

z. Repair existing limestone at locations indicated on the Drawings. Install new materials per the 288 detail(s) shown on the Drawings and in strict conformance with the limestone restoration mortar 289

Manufacturer’s specifications. 290

3.6. REPOINTING 292

a. Carefully remove all existing mortar to a minimum depth of 3/4 inches. Note: The building is a 294 historic structure. Extreme care must be taken when working adjacent to the existing limestone as 295 not to damage same. Damage to the existing limestone units caused during repointing procedures 296 shall be repaired and/or replaced at the Contractor’s expense. 297

b. When existing mortar is broken or loose beyond a depth of 3/4 inches, remove to a depth where 298 firm solid mortar is encountered. All joints must be clean of unsound mortar material in a square 299 manner the full depth of the cut. Furrow shaped joints will not be acceptable. 300

c. The cutting out of joints shall be done with suitable tools, either hand tools or mechanical 301 equipment, in such a manner as will not loosen adjacent joints or injure the edges or corners of the 302 limestone units. Where the mortar is tightly bonded at one side of the joint, and if the contour 303 permits, the cutting shall be done with portable grinders with abrasive wheels to minimize spalling 304 at edges of the limestone units. 305

d. After the joint has been cut out, all loose material shall be removed by brush, air jet, or water 306 stream. Following this cleaning the joint shall be thoroughly moistened. The joint shall be damp but 307 without free water on the surface. 308

e. With joint damp, completely fill with mortar. 309

f. Following at the proper interval, the joint shall be compressed and tooled with a smooth iron of 310 selected width to produce a smooth, dense surface, raked 1/16” from surface of brick or similar 311 depth as typically existing, and tightly pressed against the edges of the masonry units. Complete 312 by gently brushing the face of the joint to match existing adjacent rough texture. 313

g. All necessary protection shall be provided to prevent damage to the existing roofs. 314

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3.7. LIMESTONE CLEANING 316

a. Clean all limestone per approved written description of proposed cleaning procedure. 318

b. Clean all limestone per…