A. Product Data: For each type of product.

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1 SECTION CAST-IN-PLACE CONCRETE PART 1 - GENERAL 1.1 SUMMARY A. Section includes cast-in-place concrete, including fonnwork, reinforcement, concrete materials, mixture design, placement procedures, and finishes. New Cast-In-Place Concrete work is limited to an exterior foundation/grade beam and interior concrete floor slab replacement. For exterior side walk replacement, refer to specification section Concrete Paving. 1.2 ACTION SUBMITTALS A. Product Data: For each type of product. B. Design Mixtures: For each concrete mixture. C. Steel Reinforcement Shop Drawings: Placing Drawings that detail fabrication, bending, and placement. 1.3 INFORMATIONAL SUBMITTALS A. Material certificates. B. Material test reports. C. Formwork Shop Drawings: Prepared by or under the supervision of a qualified professional engineer, detailing fabrication, assembly, and support of form work. 1.4 QUALITY ASSURANCE A. Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C 94/C 94M requirements for production facilities and equipment. I. Manufacturer certified according to NRMCA's "Certification of Ready Mixed Concrete Production Facilities." 2. Testing Agency Qualifications: The Contractor shall retain the services of An independent agency, acceptable to authorities having jurisdiction, qualified according to ASTM C 1077 and ASTM E 329 for testing indicated. The Contractor shall be required to notify the Owner's representative a minimum of 48 hours prior to all placement of concrete. Project No. R1509-0l Rev. 0/Issued for Construction

2 1.5 FIELD CONDITIONS A. Cold-Weather Placement: Comply with ACI Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise specified and approved in mixture designs. B. Hot-Weather Placement: Comply with ACI 301. PART 2- PRODUCTS 2.1 CONCRETE, GENERAL A. ACI Publications: Comply with the following unless modified by requirements in the Contract j Documents: ' 1. ACI ACI FORM-FACING MATERIALS A. Smooth-Formed Finished Concrete: Form-facing panels that provide continuous, true, and smooth concrete surfaces. Furnish in largest practicable sizes to minimize number of joints. B. Rough-Formed Finished Concrete: Plywood, lumber, metal, or another approved material. Provide lumber dressed on at least two edges and one side for tight fit. 2.3 STEEL REINFORCEMENT A. Reinforcing Bars: ASTM A 615/ A 615M, Grade 60, deformed. B. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded-wire reinforcement in place. Manufacture bar supports from steel wire, plastic, or precast concrete according to CRSI's "Manual of Standard Practice." 2.4 CONCRETE MATERIALS A. Cementitious Materials: 1. Portland Cement: ASTM C 150/C 150M, Type I gray. 2. Fly Ash: ASTM C 618, Class For C not to exceed 15% B. Normal-Weight Aggregates: ASTM C 33/C 33M, graded. 1. Maximum Coarse-Aggregate Size 1 inch nominal. 2. Fine Aggregate: Free of materials with deleterious reactivity to alkali in cement. Project No. R Rev. 0/Issued for Construction

3 C. Air-Entraining Admixture: ASTM C 260/C 260M. D. Chemical Admixtures: Certified by manufacturer to be compatible with other admixtures and that do not contribute water-soluble chloride ions exceeding those permitted in hardened concrete. Do not use calcium chloride or admixtures containing calcium chloride. I. Water-Reducing Admixture: ASTM C 494/C 494M, Type A. 2. Retarding Admixture: ASTM C 494/C 494M, Type B. 3. Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type D. 4. High-Range, Water-Reducing Admixture: ASTM C 494/C 494M, Type F. 5. High-Range, Water-Reducing and Retarding Admixture: ASTM C 494/C 494M, Type G. 6. Plasticizing and Retarding Admixture: ASTM C 1017 /C 1017M, Type II. E. Water: ASTM C 94/C 94M and potable. 2.5 A. B. c. D. E. CURING MATERIALS Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete. Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. when dry. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet. Water: Potable. Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B, nondissipating, certified by curing compound manufacturer to not interfere with bonding of floor covering. F. Clear, Solvent-Borne, Membrane-Forming Curing and Sealing Compound: ASTM C 1315, Type 1, Class A. 2.6 CONCRETE MIXTURES, GENERAL A. Prepare design mixtures for each type and strength of concrete, proportioned on the basis of laboratory trial mixture or field test data, or both, according to ACI 301. B. Admixtures: Use admixtures according to manufacturer's written instructions. C. Use water-reducing and -retarding admixture when required by high temperatures, low humidity, or other adverse placement conditions. 2.7 CONCRETE MIXTURES FOR BUILDING ELEMENTS A. Normal-Weight Concrete: Project No. Rl Rev. 0/Issued for Construction

4 1. Minimum Compressive Strength: 4500 psi -at 28 days. 2. Maximum W/C Ratio: Slump Limit: 4 inches plus or minus 1 inch" 4. Air Content: 6 percent, plus or minus 1.5 percent at point of delivery for l-inch nominal maximum aggregate size. 2.8 FABRICATING REINFORCEMENT A. Fabricate steel reinforcement according to CRSI's "Manual of Standard Practice." 2.9 CONCRETE MIXING A. Ready-Mixed Concrete: Measure, batch, mix, and deliver concrete according to ASTM C 94/C 94M and ASTM C 1116/C 1116M, and furnish batch ticket information. 1. When air temperature is between 85 and 90 deg F, reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F reduce mixing and delivery time to 60 minutes. PART 3 -EXECUTION 3.1 FORMWORK INSTALLATION A. Design, erect, shore, brace, and maintain formwork, according to ACI 301, to support vertical, lateral, static, and dynamic loads, and construction loads that might be applied, until structure can support such loads. B. Construct fonnwork so concrete members and structures are of size, shape, alignment, elevation, and position indicated, within tolerance Hmits of ACI C. Chamfer exterior corners and edges of permanently exterior exposed concrete. 3.2 EMBEDDED ITEM INSTALLATION A. Place and secure anchorage devices and other embedded items required for adjoining work that is attached to or suppotied by cast-in-place concrete. Use setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded. 3.3 STEEL REINFORCEMENT INSTALLATION A. General: Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and suppotiing reinforcement. Project No. R1509-0l Rev. 0/Issued for Construction

5 3.4 CONCRETEPLACEMENT A. Before placing concrete, verify that installation of formwork, reinforcement, and embedded items is complete and that required inspections are completed. B. Deposit concrete continuously in one layer or in horizontal layers of such thickness that no new concrete is placed on concrete that has hardened enough to cause seams or planes of weakness. If a section cannot be placed continuously, provide construction joints as indicated. Deposit concrete to avoid segregation. 1. Consolidate placed concrete with mechanical vibrating equipment according to ACI FINISHING FLOORS AND SLABS A. B. General: Comply with ACI 302.1R recommendations for screeding, restraightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces. Trowel Finish: After applying float finish, apply first troweling and consolidate concrete by hand or power-driven trowel. Continue troweling passes and restraighten until surface is free of trowel marks and uniform in texture and appearance. Grind smooth any surface defects that would telegraph through applied coatings or floor coverings. 1. Apply a trowel finish to surfaces to be covered with resilient flooring, carpet, ceramic or quarry tile set over a cleavage membrane, paint, or another thin-film-finish coating system. 3.6 CONCRETE PROTECTING AND CURING A. B. c. D. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI for cold-weather protection and ACI 301 for hot-weather protection during curing. Evaporation Retarder: Apply evaporation retarder to unformed concrete smfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft. x h before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete, but before float finishing. Formed Surfaces: Cure formed concrete surfaces, including underside of beams, supported slabs, and other similar surfaces. If forms remain during curing period, moist cure after loosening forms. If removing forms before end of curing period, continue curing for remainder of curing period. Cure concrete according to ACI 308.1, by one or a combination of the following methods: 1. Moisture Curing: Keep surfaces continuously moist for not less than seven days. 2. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches and sealed by waterproof tape or adhesive. Cure for not less than seven Project No. R Rev. 0/Issued for Construction

6 days. Immediately repair any holes or tears during curing period, using cover material and waterproof tape. 3. Curing Compound: Apply uniformly in continuous operation by power spray or roller according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall within tlu ee hours after initial application. Maintain continuity of coating and repair damage during curing period. a. Removal: After curing period has elapsed, remove curing compound without damaging concrete surfaces by method recommended by curing compound manufacturer. 3.7 CONCRETE SURFACE REPAIRS A. Defective Concrete: Repair and patch defective areas when approved by Architect. Remove and replace concrete that cannot be repaired and patched to Architect's approval. END OF SECTION Project No. Rl509~ Rev. 0/Issued for Construction

7 SECTION PRECAST CONCRETE STAIR TREADS PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Precast concrete stair treads/risers, starter nosings and landing planks, welded to supports on steel stairs. B. Related Sections: 1.2 REFERENCES 1. Section Structural Steel Framing: Stairs and stringers designed, fabricated and installed to meet applicable building codes, including weld plates for field attachment of Steptread welding plates. A. ASTM International: c 33 c 150 Concrete Aggregates Portland Cement 1.3 SUBMITTALS A. Shop Drawings: Provide setting drawings and tellj.plates showing recommended installation of anchorage devices. B. Samples: Submit one 3-inch wide by full depth samples of each type of stair tread unit to show the full range of color and texture of treads and integral detectable warning stripes, for selection and approval. Apply sealer on one sample. C. Manufacturer's Installation Details: Submit complete. D. Warranty: Provide certified copies of manufacturer's product warranties. 1.4 SUBSTITUTIONS: A. Proposed substitutions, to be considered, shall be manufactured of equivalent materials that meet or exceed specified requirements of this Section. Project No. R1509-0l Rev. 0/Issued for Construction

8 B. Proposed substitutions shall be identified not less than 10 days prior to bid date. 1.5 QUALITY ASSURANCE A. Compliance with Regulations: Comply with requirements of state and local building codes and with rules and regulations relating to building accessibility. B. Treads and connection shall be capable of supporting dead loads plus a uniform live load of 100 pounds per square foot. 1.6 DELIVERY, STORAGE AND HANDLING A. Deliver all materials to the installation site in the manufacturer's original packaging. Packaging shall contain manufacturer's name, customer name, order, identification number, and other related information. B. Handle and store stair treads, risers and landings in accordance with manufacturer's recommendations. Do not rest treads on the riser sections. 1.7 WARRANTY A. Provide warranty covering precast concrete stair treads, risers and landings against defects in material and workmanship for a period of 5 years. Unusual abuse and neglect are excepted. PART 2- PRODUCTS 2.1 MANUFACTURER A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Stepstone, Inc., South Main Street, Gardena, CA (800) Aristone Designs, 4150 East Magnolia Street, Phoenix, AZ (800) Bertelson Precast (800) , 316 River Rd. Ste. 100, Modesto, CA www. bertelsonprecast.com Project No. R Rev. 0/Issued for Construction

9 2.2 MATERIALS: 4. Centmy Group Inc. P.O. Box 228, Sulphur LA (800) Diamond Precast Stairs, rd Ave. NE, Arlington, WA (800) A. Stair treads shall be, precast concrete, consisting of Portland cement, aggt egate, color admixtures, and reinforcing, factmy formed to profiles indicated. 1. Pottland Cement: ASTM C 150, Type III, high early strength. 2. Aggt egate: ASTM C Color Admixture: As required to achieve color as selected by Owner from Manufacturers standard available colors. 4. Reinforcement - Minimum galvanized #3 rebar cage. B. Tread style: 1. Closed Riser: a. Profile as depicted on drawings with integt al detectable aggt egate waming stripe. C. Provide statter nosings with integral detectable waming stripe to match tread style and color. ' D. Landings: Of size indicated or required, matching treads in color and texture, 3" thickness. 2.3 COLORS AND FINISHES: A. Colors: Integral color admixture as selected from manufacturers standard colors with aggregate waming stripe. B. Finishes: Walking surfaces of treads and landings shall have minimum coefficient of friction of0.60, wet and dty. 1. Broom finish. C. Factoty Application of Sealer: Project No. R1509-0l Rev. 0/Issued for Construction

10 1. Factory apply one coat of penetrating sealer to all surfaces of treads, landings and starter nosings. 2. Sealer shall be non-staining, penetrating material, suitable for exterior or interior use, type which does not discolor or darken the surface. 3. Conform to sealer manufacturer's recommendations for application of sealer. 2.4 PHYSICAL PROPERTIES: A. Compressive strength: Minimum 5,000 psi. B. Size 13 inches wide, 3 inches thick, capable of span length as required for width of stair (8'-0") length. C. Weight:. Closed Riser: Approximately 49 pounds per lineal foot at 13 inch tread depth. Landing Units: 36 pounds per square foot at 3 inches thick, capable of span of 5'-0". D. Water absorption: Not more than 10 percent average, not more than 12 percent for any individual unit. E. Unit size: Within 3/16 inch of designated length, width and thickness. 2.5 ATTACHMENT ACCESSORIES: A. For welding to steel stairs: 1. 3/8 inch galvanized weld plate, approximately 6 inches by 6 inches for treads and landing units. 2. Starter Nosings have a galvanized weld plate/angle (2-1/2 inch by inch by 3/16 inch) the full length of the tread. 2.6 SOURCE QUALITY CONTROL A. Concrete for treads and risers shall be tested frequently to assure that mixes provide units having not less than 5,000 psi compressive strength at 28 days. Project No. Rl Rev. 0/Issued for Constmction

11 PART 3- EXECUTION 3.1 EXAMINATION A. Verify that structural components of stairs are in place, aligned and level, within tolerances for proper installation of stair treads and risers, and required structural inspections have been completed. 3.2 INSTALLATION- GENERAL A. Installation shall comply with requirements of applicable building codes and state and local jurisdictions. B. Install stair treads aligned, level and with uniform treads and risers throughout the extent of the stair. Where cutting is necessary, use powered masonry saw. C. Do not install stair treads having excessively stained, defaced, or damaged faces, edges, or comers where to remain exposed. Remove dust and dirt from stair tread units using oil-free compressed air. 3.3 INSTALLATION: WELDED TO STEEL STAIR SUPPORTS: A. Weld plates on treads and landing planks shall be welded to structural steel stairs as indicated on approved submittals. Any galvanized smface removed or damaged shall be repaired in accordance to ASTM A 780 using a cold galvanizing compound. B. Welding shall comply with specification section , Structural Steel Framing. 3.4 CLEANING: A. Clean exposed smfaces of stair treads and riser~. Use cleaners appropriate for precast concrete finishes, colors, and will not damage the sealer. Acid based cleaners shall not be used. 3.5 COMPLETION: A. Protect staitireads and risers from damage due to subsequent building operations. B. After installation and before completion, inspect stair tread units for construction damage, obtain new treads if required. C. Immediately prior to final acceptance of project, clean stair treads and risers. END OF SECTION Project No. Rl509-0l Rev. 0/Issued for Construction

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13 SECTION CONCRETE TOPPING PART 1- GENERAL 1.1 SUMMARY A. Section Includes: 1.2 REFERENCES 1. Installation of one component, polymer modified, shrinkage compensated cement based applied mortar for repair and resurfacing of the existing cast in place concrete entry landing surface. A. ASTM International: c 109 c 157 Compressive Strength of Hydraulic Mortars Length Change of Hardness Hydraulic Cement 1.3 SUBMITTALS A. Manufacturer's standard product information and installation procedures. B. Manufacturer's and Installers Qualifications as listed in paragraph 1.5,A. 1.4 SUBSTITUTIONS: A. Proposed substitutions, to be considered, shall be manufactured of equivalent materials that meet or exceed specified requirements of this Section. 1.5 QUALITY ASSURANCE A. Manufacturers and Installers Qualifications: The manufacturer shall be a company with at least ten years experience in the manufacture of cementitous dry packaged repair materials. Installer shall have at least ten years experience in the application of the material specified. 1.6 DELIVERY, STORAGE AND HANDLING A. Deliver all materials in original packaging, labeled with product identification, manufacturer, batch number and shelf life. Project No. R Rev. 0/Issued for Constmction

14 B. Store and handle products in accordance with manufacturers printed instructions. PART 2- PRODUCTS 2.1 MANUFACTURER A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Quikrete - Concrete Resurfacer, No Sakrete - Flo-Coat Concrete Resurfacer 3. Mapei - Concrete Renew 2.3 COLORS AND FINISHES: A. Colors: Liquid additive for adding color compatible with applied mmtar. Color as selected by Owner from manufacturers standard palette. B. Finishes: Broom finish. 2.4 PHYSICAL PROPERTIES: A. Compressive strength: ASTM C 109 (Air Cured): 1000psi@ 24 hours, 3000psi@ 7 days and days.. B. Length Change: ASTM C 157 Modified: Stored in Water less than +0.15%, Stored in Air less than -0.15% C. Walk on time 6 hours. PART 3- EXECUTION 3.1 EXAMINATION A. Examine substrates and conditions under which materials will be installed. Do not proceed with installation until satisfactory conditions are met in accordance with manufacturers printed instructions. Project No. R Rev. 0/Issued for Construction

15 B. Protect adjacent areas and building surfaces from contact due to mixing and handling of materials. Any contact with adjacent surfaces shall be immediately cleaned at Contractors expense. 3.2 SURFACE PREPARATION A. Clean existing concrete after all cracks and voids have been repaired. Pressure wash thoroughly with a 3,500 psi pressure washer. B. Level any spalled areas with trowelable consistency. 3.3 MIXING A. Comply with manufacturers printed instmctions for mixing and color application. 3.4 APPLICATION A. Comply with manufacturers printed instmctions and the following: 3.5 CURING/SEALING 1. Apply slip resistant finish with a broom making full strokes across the full distance of the landing ofthe work area without stopping perpendicular to the direction of traffic. 2. Do not apply if temperatures are below 50F or are expected to go below 40F within a 24 hour period without taking the appropriate protection measures. These measures shall be submitted for approval before proceeding. Use cold water in hot weather or hot water in cold weather to achieve desired grout temperature. A. Cure according to manufacturers printed instructions.,. B. Apply sealer in accordance to manufacturers printed instmctions. C. Protect from rain for at least 6 hours. Do not cover unless immediate rain protection is necessary. 3.6 CLEANING A. Remove excess material before material cures. END OF SECTION Project No. Rl Rev. 0/Issued for Construction

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