New Page 1

	Missoula Concrete Construction



	Utility Building Specifications Missoula Concrete Construction Missoula Montana Specifications for Utility Buildings 1.0 SCOPE This specification covers the construction and placing of Missoula Concrete Construction’s Utility Buildings. 2.0 SPECIFICATIONS ASTM C33 Concrete Aggregates ASTM C39 Method of Test for Compressive Strength of Cylindrical Concrete Specimens ASTM C143 Method of Test for Slump of Concrete ASTM C150 Standard Specification for Portland Cement ASTM C192 Method of Making and Curing Test Specimens in the Laboratory ACI 1211.1 Recommended Practice for Selecting Proportions for Normal and Heavyweight Concrete PCI MNL 116 Quality Control for Plants and Production of Precast Prestressed Concrete Products AWS D1.1 Structural Welding Code 3.0 DESIGN CRITERIA MCC Utility Buildings are designed to meet the following criteria. Calculations and Engineer’s stamped drawings are available upon request by the customer and are for their sole and specific use only. The design criteria are to ensure that the structure not only will withstand the forces of nature listed below but to provide protection from vandalism and other unforeseen hazards. A. Snow Load MCC Utility Buildings will withstand a snow load of 250 pounds per square foot. B. Wind Load MCC Utility Buildings will withstand the effects of 120 mile per hour wind load (fastest mile) or 180 mph (3 second-gust) Exposure C. C. Earth Quake MCC Utility Buildings will withstand the effects of a zone 4 earthquake. D. Tolerances Tolerances will be within the limits as dictated by the PCI Quality Control and Assurance Manual. 4.0 MATERIALS A. Concrete - General This concrete mix design is designed to ACI 211.1 to produce concrete of good workability. Mix #7.25 R - 1 cubic yard cement 681 lbs. water 232 lbs. (27.8 gal.) w/c=.34 Course aggregate (SSD) 1,800 lbs. Fine aggregate (SSD) 1,196 lbs. Water Reducing Agent 34 oz. MB 322N Air Entraining Agent 6 oz. MB AE-90 (4-7%) Ave. 28 day strength 5,500 psi 1. Cement will be low alkali type I-II or type III conforming to ASTM C-150 2. Coarse aggregates used in the concrete mix design will conform to ASTM C33 with the designated size of coarse aggregate #67. 3. Minimum water/cement ratio will not exceed 0.40. Slump will not exceed 5" with normal water reducing agent or 7” with super plasticizer. 4. Air-entrained admixtures will conform to ASTM C260. Water reducing admixtures will conform to ASTM C494, Type A. Plasticizing admixtures will conform to ASTMC 1017. Other admixtures will not be used without customer approval. B. Colored Concrete 1. Color additives will conform to ASTM C979. A 6"x12"x2" color sample will be available for customer approval. 2. The following will contain colored concrete: a. Utility Building roof panels b. Building walls c. The sample brand and type of color additive will be used throughout the manufacturing process. d. All ingredients will be weighted and the mixing operation will be adequate to ensure uniform dispersion of the color. e. All ingredients will be weighed and the mixing operation will be adequate to ensure uniform dispersion of the color. 3. Color pigments will be by Davis Colors. C. Cold Weather Concrete 1. Cold weather concrete placement will be in accordance with ACI 306. 2. Concrete will not be placed if ambient temperature is expected to be below 35 degrees F. during the curing period unless heat is readily available to maintain the surface temperature of the concrete at least 45 degrees F. 3. Materials containing frost or lumps of frozen materials will not be used. D. Hot Weather Concrete The Temperature of the concrete will not exceed 80 degrees F. at the time of placement and when the ambient temperature reaches 90 degrees F. The concrete will be protected with moist covering. E. Concrete Reinforcement 1. All reinforcing steel will conform to ASTM A615. All welded wire fabric will conform to ASTM A185. 2. All reinforcement will be new, free of dirt oil. Paint, grease, and loose mill scale and loose or thick rust when placed. 3. Details not shown on drawings or specified will be to ACI 318. 4. Steel reinforcement will be centered in the cross-sectional area of the walls and will have at least 1" of cover on the under surface of the floor and roof. 5. The maximum allowable variation for center-center spacing of reinforcing steel will be 1/2". 6. Full lengths of reinforcing steel will be used when possible. 7. Reinforcing bars will be bent cold. 8. Diagonal reinforcement will be placed around all openings. F. Sealers and Curing Compounds 1. Curing compounds, if used, will be odorless, complying with ASTM C309 type I or I-D. 2. Weatherproofing sealer for exterior of building will be clear, low gloss, water based acrylic sealer (Dayton-Superior J-24). G. Caulking, Grout, Adhesive and Sealer 1. All caulking will remain flexible and non-sag at temperatures from 50 to 140 degrees Fahrenheit> 2. Interior joints will be caulked with white “Sidewinder” by DAP. 3. Exterior joints will be caulked with a siliconized acrylic caulk that closely matches the exterior concrete color (by GE Sealants). Roof ridge will be 100% silicon caulk (also by GE Sealants). 4. Epoxy concrete adhesive will be two component rigid, non sag gel adhesive for bonding to dry or damp surfaces, moisture insensitive. 5. Portland cement mortar will consist of one part Portland cement, three parts sand and enough water to make a workable mixture H. Paint 1. All paints and materials will conform to all Federal specifications or be similar "top-of-the-components". Paints will be lead free. a. Inside concrete surfaces I. Interior floors will be a 2-part water based epoxy (AQUA TILE by INSL-X) The color will be gray. II. Interior walls and ceiling will be a 100% acrylic emulsion, Mirrorlac-WB DP84XX by DEVOE / GLIDDEN. The color will be white. b. Metal surfaces both inside and out. I. Primer and enamel - Mirrorlac DP85XX by DEVOE / GLIDDEN c. Exterior concrete surfaces I. Exterior walls will be a pure acrylic water repellent penetrating stain in the same color as the walls followed by a clear acrylic sealer. Stain enhanced with Wondershield by DEVOE / GLIDDEN. DR15XX II. Simulated shake roofs will receive one heavy coat of pure linseed oil. I. Steel Doors 1. Doors will be flush panel type 1-3/4" thick, minimum 16 gauge prime coated steel panels, level 3 Extra Heavy-duty, by Ceco Door Products. 2. Door frames will be knockdown or welded type, single rabbet, minimum 16 gauge prime coated steel width to suit wall thickness. Three (3) rubber door silencers will be provided on latch side of frame. J. Door Hinges Door hinges will be 3 per door with dull chrome plating 4 1/2"x 4 1/2", adjustable . tension automatic-closing for each door. K. Door Hardware (as specified by customer or as below) 1. Lockset will meet ANSI AI 56.2 Series 4000, Grade 1 cylindrical lockset for exterior doors. 2. Lever handle both inside and out. 3. Non-locking passage lever and separate deadbolt lock (“Yale” or “Best” brand. Owner furnished core). 4. U.S. 26D finish. L. Door or Wall Louvers Door louver will be fixed, inverted split Y, non-vision, 18 gauge cold rolled steel with a factory prime coat equal to FDLS series. Wall louver (if requested) will be HEAVY DUTY KICK PROOF VENT by Romtec, Roseburg, OR. M. Doorstop (optional) Door stop will have a cast metal base, US 26D finish, and hook latch for holding the door in the open position. N. Door Sweep Door sweep will be provided at the bottom of door and will be an adjustable brush type, or rubber as requested by the customer. O. Threshold Threshold will be extruded aluminum of a thickness to provide a maximum clearance of 3/8” between threshold and bottom of door. P. Windows 1. Windows frames will be constructed from steel. 2. Window glazing will be 1/4" thick LEXAN polycarbonate. 5.0 MANUFACTURE A. Mixing and Delivery of Concrete. Mixing and delivery of concrete will be in accordance with ASTM C94, section 10.6 through 10.9 with the following additions. 1. Aggregate and water will be adjusted to compensate for differences in the saturated surface-dry conditions. 2. Concrete will be discharged as soon as possible after mixing is complete. This time will not exceed 30 minutes. B. Placing and Consolidating Concrete Concrete will be consolidated by the use of mechanical vibrators. Vibrations will be sufficient to accomplish compaction but not to the point that segregation occurs. C. Finishing Concrete 1. Interior floor and exterior slabs will be floated and troweled until all marks are removed. A light broom finish will be applied to the exterior and interior slabs for a non-slip finish. 2. All exterior building walls and exterior screen walls will be a barnwood texture, unless otherwise specified. 3. All exterior surfaces of the roof panels will be cast to simulate a cedar shake roof, unless otherwise specified. The underside of the overhang will have a smooth finish. D. Cracks and Patching 1. Cracks in concrete components that are judged to affect the structural integrity of the building will be rejected. 2. Small holes, depressions and rock pockets will be patched with a suitable material. The patch will match the color, finish and texture of the surrounding surface. 3. Patching will not be allowed on defective areas if the structural integrity of building is affected. E. Curing and Hardening Concrete 1. Concrete surfaces will not be allowed to dry out from exposure to hot, dry weather during the initial curing period. 2. Curing compounds will not be used on interior walls as they will prevent paint adhesion. 6. FINISHING AND FABRICATION A. Structural Joints 1. All welding will be by Certified Welders only (in accordance with AWS D1.1). 2. Wall components will be joined together with 2 welded plate pairs at each joint. Weld plates will be anchored into the concrete panels and welded together with a continuous weld. 3. Walls and roof will be joined with weld plates, 2-1/2"x5", at each building corner. 4. The joint between the floor slab and walls will be joined with a grout mixture on the inside. a matching colored caulk on the outside and two weld plates 6" long per wall. B. Painting 1. An appropriate curing time will be allowed before paint is applied to concrete. 2. Some applications may require acid etching. A 30% solution of hydrochloric acid will be used, flushed with water and allowed to thoroughly air dry. 3. Painting will not be done outside in cold, frosty or damp weather. 4. Painting will not be done outside in winter unless the temperature is 50 degrees Fahrenheit or higher. 5. Painting will not be done in dusty areas. 6. Schedule of finishes: a. Inside concrete surfaces I. Inside floors will be 2 coats of 2-part water based epoxy. II. Interior walls and ceiling will be one coat primer / filler and 2 coats of white water based acrylic emulsion. b. Metal surfaces both inside and out I. 1 coat primer and 2 coats of enamel c. Exterior concrete surfaces I. Exterior slab will be 1 coat of clear sealer. II. Stained enhanced exterior walls will be 1 coat of pure acrylic water repellent penetration stain in the same color as the walls or roof followed by 1 coat of clear acrylic sealer. 7.0 QUALITY CONTROL AND INSPECTION A. Pre-pour inspection. 1. Check all panel measurements including diagonals (must be within ¼ inch). 2. Check rebar spacing and clearance 3. Check location of all embeds. B. Concrete Testing 1. The following tests will be performed on concrete used in the manufacture MCC Utility Buildings. Testing will only be performed by qualified individuals who have been certified ACI Technician Grade 1. Sampling will be in accordance with ASTM C172. a. The slump of the concrete will be performed on the first batch of concrete in accordance with ASTM C143. This slump will be in the 3"-5" range formixes with normal water reducing agents, and 3”-7” range for super plasticized mixes. b. The air content of the concrete will be checked per ASTM C231 on the first batch of concrete. The air content will be in the range of 4%-6%. c. The compressive strength of the cylinders will be tested to ASTM C39. d. Test cylinders will be taken from each other batch. - 1 cylinder will be tested prior to removal of forms and must be at 2,500 psi or higher. - 1 cylinder represents 7 day strength - 2 cylinders will represent 28 day strength and must be 4,500 psi or greater. C. After Form Removal Inspection 1. Recheck panel dimensions 2. Verify that all embeds remained in place. 3. Look for all cracks or blemishes that may cause rejection. 4. Assure that panels are properly yarded and blocked. 8.0 INSTALLATION A. Scope of Work 1. Work specified under this Section includes excavation, backfill and placement of MCC Utility Buildings. B. Materials Bedding material to be sand or 3/4" minus crushed or screened aggregate. C. Location and Access to the Site It is the responsibility of the customer to locate the structure in area that provides safe and reasonable access for trucks and equipment. 1. The area must be free of overhead or underground obstructions. 2. Care must be taken to not place excavated material in the area where the crane must be positioned. 3. Verify that bridges/culverts enroute to the site are rated for HS-20 loading. 4. Deliveries may be delayed if road conditions are hazardous or unsuitable for normal trucks and trailers. 5. Trucks must be able to reach the site under their own power. Placement 1. Buildings Placed Upon Compacted Gravel Pad. a. Care must be taken to allow slack in electrical wire entries and swing joints or flexible pipe in plumbing entries as the building will be subject to several inches of up and down movement during frost cycles. b. Oversize penetrations in floor slab for pipe or electrical entries. Place sand or screened gravel in the extra space, DO NOT GROUT. c. Backfill exterior of building up to finished floor elevation allowing drainage away from the structure. Buildings placed upon existing asphalt or concrete slabs. a. Place continuous ½”x4” neoprene rubber bearing pads around building perimeter between floor slab and asphalt or concrete. b. If existing asphalt or concrete is moderately sloped or irregular, prepare the area with a 1” minimum thickness leveling coarse of clean sand. After the building is placed, remove sand from the perimeter of the building (undermine 4”-6”) and replace with dry packed grout. c. A 3” diameter hole in the floor will be in each interior corner of the structure. Drill (in concrete) or drive (in asphalt) a 1” diameter x18” long steel dowel to a depth that puts the top of the dowel 1” below the fiinished floor surface. Fill each hole with high-strength grout. (This process is for seizmic considerations) Notes: Take care to locate all buried utilities. See section 1 (above) for electrical and plumbing penetrations. 3 . Buildings placed upon cast in place frost walls, foundations, cisterns, basements. a. Place continuous 1”x1” Butyl Rubber Sealant between foundation and building floor prior to building placement. (Cistern applications require non-toxic materials.) b. Dowel building to foundation as in Section 2. Dowel may be placed in foundation during casting to avoid drilling. 9.0 MISSOULA CONCRETE CONSTRUCTION WARRANTY Missoula Concrete Construction warrants that all goods sold are manufactured with the best of industry standards and that all materials and workmanships are as set forth in the specifications. For a period of 3 years from the date of delivery, Missoula Concrete Construction will repair or replace, free of charge, any of its structures which are determined to be structurally unsound due to poor workmanship or materials. Determination must be in writing by a licensed structural engineer. Missoula Concrete Construction must be given the opportunity to inspect the site. For a period of 7 years form the date of delivery, Missoula Concrete Construction will replace, free of charge, any LPDE vault liner which allows the migration of liquid contents from the vault to the surrounding soil due to defects in manufacturing. Accessories are warranted to the extent of the individual accessory manufacturer’s warranty. This warranty shall not apply to: goods which have been improperly handled or improperly installed by others; goods which have been poorly sited (Such as in areas subject to flooding or high water tables.) goods which have been repaired or altered without Missoula Concrete Construction’s written consent; goods which have been damaged by forces of nature in excess of design criteria, to include fire, flood, avalanche, landslide, tornado, etc. minor hairline cracks due to shrinkage, thermal expansion / contraction, or shipping. damage due to accidents, vandalism, or improper maintenance. 10.0 DISCLAIMER OF OTHER WARRANTIES THE WARRANTY SET FORTH ABOVE IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. ALL OTHER WARRANTIES ARE HEREBY DISCLAIMED. MISSOULA CONCRETE CONSTRUCTION MAKES NO OTHER WARRANTY OF MERCHANTABILITY OF OR FITNESS FOR A PARTICULAR PURPOSE OR USE. 11.0 LIMITATION OF REMEDIES In the event of any breach of any obligation hereunder; breach of any warranty regarding the goods or any negligent act or omission of any party, the parties shall otherwise have all rights and remedies available at law; however, in no event shall Missoula Concrete Construction be subject to or liable for any incidental or consequential damages. Back to the top Back to Utility Building Product Information Missoula Concrete Construction 8012 Deschamps Ln P.O. Box 16086 Phone: 406-549-9682 Missoula, MT 59808 Missoula, MT 59808 Fax: 406-549-6404