Pretopped Double Tees

Precast elements must be joined together within. PCI Journal,2005,50(2):44-45. 2), with an in-situ topping. With appropriate planning, lifespans of 20, 40 and even 50 years are achievable with Shockey Precast. panel to panel. The parkade fire was an extreme in my mind; I don't know if we should be realistically designing for an entire parking garage to go up in flames. This invention relates to connecting devices for concrete panels, and especially to connection of precast concrete double tee floor panels. single placement in the plant (so-called pretopped double tees) or using two-course construction, with an initial, 2-in. institutions and companies, the programme has coordinated the efforts of over a dozen different research teams from across the United States, and included, as signicant steps, (a) the. "Analytical Method to Determine the Elastic In-Plane Behaviors of Pretopped, Precast Untopped Double-tee Diaphragm with Discrete Connections under Seismic Loads," PCI. 39 in,dan kelembaan udara relative sebesar 70 % untuk keadaan normal. Most of the walls around the northwest and southwest cores are to be load bearing precast concrete walls. The double tee was loaded to service level, 85%, ultimate, 110% and failure. Design details of the wall system and the fame connections arepresented in a companion paper [Stanton et. ) are provided at the north and south ends of the structure to provide for vertical automobile circulation, both up and down. CarbonCast is a precast concrete technology that uses carbon fiber grid as secondary reinforcing or as a shear truss. Structures built to cover long spans and that require high load capacities for floor and roofing systems are the perfect candidate for our precast and prestressed double tee concrete components. Near grids F and 11. sizes with 10 ft. 10DT26 and 10LDT26 (59k, PDF) 10DT34 and 10LDT34 (62k, PDF) 12DT30 and 12LDT30 (58k, PDF) 12DT34 and 12LDT34 (61k, PDF) Rectangular Beams. When used in the flanges of CarbonCast pretopped double tees, the carbon-fiber grid can reduce weight by 12 percent and eliminate the need for sealers and sacrificial barrier coatings. Highconcrete. double tee to double tee. • Mixed system. stair bearing to landing. Performance of Bulb Tees with Self Consolidating Concrete Evaluation of Bond Mechanics in Prestressed Concrete Applications FRP Bridge Decks with RC Parapets. A separate precast 1,200-car parking garage utilizing pretopped double tees is included in the project. 33-m-wide units were 5. A pretopped double-tee diaphragm was located at the second floor of the specimen (Fig. Dari profil penampang PCI 12LDT34 Pretopped Double Tee diketahui = 2. Design details of the wall system and the fame connections arepresented in a companion paper [Stanton et. Current code design choices for precast systems. Structural design included pretopped precast double tees with precast beams, columns and shear walls. By going to the double-tees, it's more cost-effective for the precaster," says Kinnell, noting that the 12-ft. With field-topped double tees, connection spacing can be up to 8 to 10 feet. Blast Resistance of a Load Bearing Shear Wall Building. 1980年代,停车场结构中研发的双T板(Pretopped double-tees)在磨损方面表现出预制预应力混凝土构件最优化耐久性。工厂浇筑混凝土比现场浇筑混凝土更耐用,因为它能够以较低的水胶比和适宜的控制条件下进行浇筑。. for rapid construction is the double tee. Three different precast floor systems were adopted at each level, namely a composite double-tee diaphragm at the first floor, non-composite hollow-core at the second and pretopped double-tee diaphragm at the third. The use of carbon fiber grid over conventional reinforcement yields a number of unique properties to CarbonCast components: [7]. Pretopped Double Tee Benefits & Considerations - 2 of 2. , Fleischman, R. Blakeslee has been at the forefront of state-of-the art parking garage design and construction for the past 45 years. However, the use of double tees required Woodland to carefully. The test structure had a rectangular plan and incorporated a pretopped double-tee diaphragm with welded chords, a noncomposite-topped diaphragm on hollow-core units, and a composite-topped diaphragm on double-tee floor units. Double-tee floor systems can be topped in the field with cast-in-place concrete or manufactured with the appropriate strength and surface conditions to eliminate the need for field-placed top-ping. The distinctive exterior precast spandrels, which combined sandblasted and exposed aggregate finishes and inlayed tiles, were designed by the architect, in collaboration with the precaster, to simulate a runway approach. Drainage patterns are developed by varying elevations of framing and deck members. PL 6" x 2" x ¼" No. An experimental study of flange-to-flange connections of double-tees was conducted as part of the PCI-funded research effort in developing a seismic design methodology for precast concrete diaphragms. Precast Concrete Double-tee Connections, Part I: Tension Behavior. Because carbon fibre does not corrode, parking garages do not face long-term flange degradation from cracking and spalling. Unless the facility is user-friendly, projecting a safe, secure, and easy to use environment, parkers will find other options. The pretopped double tee is a very common precast, President (7. The building boasts 6 suspended levels; 1394 stalls including slab on grade and a precast roof. By going to the double-tees, it's more cost-effective for the precaster," says Kinnell, noting that the 12-ft. c bottom in. double tee ends for chords where higher strength or deformation demand are critical (Figure 1). Vulnerability assessment and retrofit solutions of precast industrial structures precast structures;seismic assessment;seismic retrofit;industrial buildings; The seismic sequence which hit the Northern Italian territory in 2012 produced extensive damage to reinforced concrete (RC) precast buildings typically adopted as industrial facilities. 2, is based on a topped hollow-core slab floor system. 5-hour plant tour, video and exhibit area, catered lunch, and prize drawings, besides the featured AIA-registered presentations including Precast Parking Structure Design, Total Precast Systems, and CarbonCast Carbon Fiber-Reinforced Precast Pretopped Double Tees for Parking Structures. 5 Engineering Manager the interest of designers and precast concrete manufacturers The Shockey Precast Group Winchester, Virginia alike. Figure 3 shows the cross sections of the floor units and the connection with adjacent elements. Koefisien susut diambil sebesar 1. Highconcrete. in Civil Engineering, August 10th, 2010 Chongqing University, Chongqing, China. in the double tees? Who is responsible for the design? Who is supplying them? Is the rebar epoxy coated? 6. 8 m) and 8 ft (2. Precast Prestressed Concrete Parking Structures: Recommended Practice for Design and Construction Pci Committee On Parking Marketing & Pro. The test structure had a rectangular plan and incorporated a pretopped double-tee diaphragm with welded chords, a noncomposite-topped diaphragm on hollow-core units, and a composite-topped diaphragm on double-tee floor units. Pre-Topped Double Tee cross-sections. 30" x 12' Double Tee (Pretopped) 32" x 12' Double Tee (No Topping) 32" x 12' Double Tee (2" Topping) 34" x 12' Double Tee (Pretopped). They also wanted an open garage with few obstructions, so tenants could feel secure when coming to and leav-ing work. Three ecospace elevators are included, each with custom glass doors to provide extra visibility. Lite wall will s. Avoid storing snow directly over floor drains. Pretopped tees have a flange thickness of 4 inches, which creates the wearing surface in parking structures. A Practical Method to Estimate Elastic Deformation of Precast Pretopped Double Tee Diaphragms[J],PCI Journal,2005 (2 ) : 44 - 55. 4 Selected pretopped double-tee properties for normal weight concrete Width 4height A g in. These two types of systems are referred to as topped and untopped (or pretopped) double-tee parking structures. Check out our precast concrete images on Pinterest. The second prototype building, shown in Fig. landing to wall panel. Pretopped Double Tees. A pretopped double-tee diaphragm was located at the second floor of the specimen (Fig. ―Effect of Spandrel Beam to Double Tee Connection Characteristic on Precast Diaphragm Response‖, in preparation. 细部构造对预制rc楼板发卡式连接件面内抗剪性能的影响: 庞瑞 1, 梁书亭 1, 朱筱俊 2, 武川川 1, 孟瑶 1: 1. Double tees are used primarily as deck floor and roof components for any type of structure, including parking structures, office buildings and industrial buildings. The detailed formations of precast floor slab connectors have significant effect on its axial capacity, but there is no such specific provision on it at present. However, PCI cannot accept responsibility for any errors or oversights in the use of material or in the preparation of engineering plans. Design is Straight-forward per AltusGroup Design Handbook. Warpage data shall be sent to the Standards Unit of Main Office Structures. The distinctive exterior precast spandrels, which combined sandblasted and exposed aggregate finishes and inlayed tiles, were designed by the architect, in collaboration with the precaster, to simulate a runway approach. Nitterhouse Concrete Products offers structural precast concrete for commercial and residential construction. Pre-Topped Double Tee cross-sections. When used in the flanges of CarbonCast pretopped double tees, the carbon-fiber grid can reduce weight by 12 percent and eliminate the need for sealers and sacrificial barrier coatings. Analytical Method for Assessment of Shear Capacity Demand for Untopped Precast Double-Tee Diaphragms Joined by Mechanical Connectors[D ]. During the design phase, Woodland Construction of Jupiter, Fla. CE 10010 ISSUED FOR BID: 3 No. You're obviously going to destroy a few double tees and possibly have a localized collapse but what I saw was that it wasn't too much worse than normally reinforced concrete. Effect of Spandrel Beam to Double Tee Connection Characteristic on Flexure-Controlled Precast Diaphragms G Wan, RB Fleischman, D Zhang Journal of Structural Engineering 138 (2), 247-257 , 2011. Double Tee Floor Slabs 12 f 'c 25 to 30 Double Tee Roof Slabs 12 f 'c 35 to 40 Inverted Tee or ELL Beams 6 f 'c 10 to 20 Hollow Core Slabs 6 f 'c 45 to 50 GENERAL NOTATION Width of Precast Depth of Precast Description Section (ft) Section (in) of Section 10DT24 1. Pretopped Precast Double Tees • Project Features Tight Site Conditions Tree Preservation Adjacency to Existing Hospital Facility Brandon Regional Hospital Structured Parking Brandon, FL "The new garage has turned into a very positive addition to our campus and an employee perk. They are made either pretopped or field topped. untopped (or pretopped) diaphragm, such a design does not comply with the requirements of Section 21. These two types of systems are referred to as topped and untopped (or pretopped) double-tee parking structures. pdf), Text File (. Drainage patterns are developed by varying elevations of framing and deck members. Pre-Con was proud to be chosen for the Oakville GO Transit Design/ Build Parking Structure project. A connector for a concrete structure including two generally flat plates connected together along one edge to form an elongated structure having substantially an L-shaped cross section. The subassembly consist of a portion of a double tee floor diaphragm 8ft long and 4ft DT web to the free flange face. 247-257 11 p. TECHNICAL SPECIFICATIONS DENVER INTERNATIONAL AIRPORT 2011 PARKING STRUCTURE TABLE OF CONTENTS REPAIRS & MOISTURE PROTECTION – LEVEL 5 CONTRACT NO. Stair and Elevator Towers: Check handrails, stair treads and landings, metal or precast stair members, walls, and roof for deterioration. Can you tell me why you're so skeptical of pre-topped double tees and hollow core? Pretopped tees are purportedly more durable, attractive, stronger, and more economical than site topped tees. When used in the flanges of CarbonCast pretopped double tees, the carbon-fiber grid can reduce weight by 12 percent and eliminate the need for sealers and sacrificial barrier coatings. 2R-13: Design Guide for Connections in Precast Jointed Systems Author: Joint ACI-ASCE Committe 550 Subject: The proper detailing and design of precast concrete connections are essential to the performance of a precast concrete structure. CarbonCast Pretopped Double Tee CarbonCast Pretopped Double Tee with Curbed Deck. 12’-0” x 34” PreTopped Double Tees Dead Load Weight of Tee = 85 psf MKLT112-0109 A=981 in. Pretopped double tees are a recommended alternative to field-placed concrete toppings. The simulation structure is a three-story precast concrete shear wall building. sizes with 10 ft. Zhang, W, Oliva, MG (2007) Analytical method to determine the elastic in-plane behavior of pretopped, precast concrete double-tee diaphragms with discrete connections. CarbonCast Pretopped Double Tees can also incor-porate field-installed precast curbs to direct water to drains, or they can be cast to receive field-applied washes/pour strips. Historically, pretopped double tees made with high strength concrete outperform field-topped double tees made with low-strength concrete. Taracon Precast’s double tees are the ideal solution for construction projects in which the strength, beauty and flexibility of the design are critical. pdf), Text File (. The weight for the floors includes double tees, ceiling and partitions (total load of 70 psf) but not beams and columns. Blakeslee has been at the forefront of state-of-the art parking garage design and construction for the past 45 years. Pre-Con was proud to be chosen for the Oakville GO Transit Design/ Build Parking Structure project. This twisting may occur intention-ally, such as when the bearing supports at the two ends of. sizes with 10 ft. These two types of systems are referred to as topped and untopped (or pretopped) double-tee parking structures. double tee to lite wall. Parking Design Manual April 2013. [email protected] Equipment Site. The diaphragms were designed and detailed according to a new design methodology developed as part of parallel research. UR Team The Co-PIs are Dr. a composite double-tee diaphragm, the second-floor level was a noncomposite hollow-core diaphragm, and the third-floor level incorporated a pretopped double-tee diaphragm. 4 m) between connections for aunder controlled conditions. Associate Chair. With field-topped double tees, connection spacing can be up to 8 to 10 feet. LOAD TESTING OF PRESTRESSED CONCRETE DOUBLE TEES WITHOUT WEB REINFORCEMENT. Lite wall will s. Education University of Arizona, Tucson, Arizona Ph. The diaphragms were designed and detailed according to a new design methodology developed as part of parallel research. The schedule includes a 2. stair bearing to landing. However, PCI cannot accept responsibility for any errors or oversights in the use of material or in the preparation of engineering plans. TECHNICAL SPECIFICATIONS DENVER INTERNATIONAL AIRPORT 2011 PARKING STRUCTURE TABLE OF CONTENTS REPAIRS & MOISTURE PROTECTION - LEVEL 5 CONTRACT NO. The "standard" thin-flange Double Tee with composite topping, and the thick-flange Double Tee, are used for moderately loaded applications, such as floors for most. 2R-13: Design Guide for Connections in Precast Jointed Systems Author: Joint ACI-ASCE Committe 550 Subject: The proper detailing and design of precast concrete connections are essential to the performance of a precast concrete structure. The second prototype building, shown in Fig. Amenities in the office building include a full service child care facility, complete in-house fitness center and a large commercial kitchen with servery and dining area. 1 Pemodelan Struktur Pada tugas akhir ini, akan direncanakan suatu rangka bidang portal statis tak tentu yang disimulasikan sebagai salah satu rangka dari struktur bangunan gudang. In the upper two floors, topped hollow-core slabs spanning between the gravity frames and the wall pro-vided the floor system. C-GRID’s corrosion resistance and strength allow you to reduce. & Zhang, D. Reserarch Experinece for Undergraduates. institutions and companies, the programme has coordinated the efforts of over a dozen different research teams from across the United States, and included, as signicant steps, (a) the. Warpage data shall be sent to the Standards Unit of Main Office Structures. Pre-Con was proud to be chosen for the Oakville GO Transit Design/ Build Parking Structure project. Cast-in-place concrete pour strips and closure strips at cross joints of precast double tees. Pretopped Double Tees. PCI Journal,2005,50(2):44-45. Typically, double tees are 8, 10, 12, and 15 ft in width and can span up to 65 ft. ―Effect of Spandrel Beam to Double Tee Connection Characteristic on Precast Diaphragm Response‖, in preparation. AltusGroup precaster Shockey Precast Group used CarbonCast Pretopped Double Tees in th e engineer ing, manufacturing and erection of the 540-space garage. Floor live load is 50 psf, except 100 psf is used in the elevator lobby. a composite double-tee diaphragm, the second-floor level was a noncomposite hollow-core diaphragm, and the third-floor level incorporated a pretopped double-tee diaphragm. Plane Behaviors of Pretopped, Precast Untopped Double-tee Diaphragm with Discrete Connections under Seismic Loads," PCI Journal, V. Education University of Arizona, Tucson, Arizona Ph. The need to create a parking structure that precisely fits the needs of the users can- not be stressed enough. Avoid storing snow directly over floor drains. , Feb 2012, In : Journal of Structural Engineering (United States). When used in the flanges of CarbonCast pretopped double tees, the carbon-fiber grid can reduce weight by 12 percent and eliminate the need for sealers and sacrificial barrier coatings. single placement in the plant (so-called pretopped double tees) or using two-course construction, with an initial, 2-in. in the double tees? Who is responsible for the design? Who is supplying them? Is the rebar epoxy coated? 6. Most of the walls around the northwest and southwest cores are to be load bearing precast concrete walls. 2002 for the development of a seismic design methodology for precast concrete diaphragms, and subsequently awarded the project to the DSDM Consortium. OAKVILLE, ONTARIO, GO TRANSIT PARKING STRUCTURE DESIGN/ BUILD. Pretopped double tees put the final driving surface immediately in place— eliminating the need for expensive, field-applied concrete toppings. Pre-Con was proud to be chosen for the Oakville GO Transit Design/Build Parking Structure project. The parkade fire was an extreme in my mind; I don't know if we should be realistically designing for an entire parking garage to go up in flames. The top surface is typically broom-finished to provide improved driving traction. to achieve design requirements. Lite wall will s. The double tees are supported by precast spandrel beams or inverted tee beams, and precast bearing walls. JOINTING PRACTICE. However, it sounds as though you might be the guy that I need to talk to. Check out our precast concrete images on Pinterest. Pretopped Double Tees. 15ft Double tees are the premium choice for parking decks and can also be used in roof applications where a long, clear span is required. is added in the field. 北美地区预制/预应力混凝土行业快速发展的里程碑事件是1950年在宾夕法尼亚州费城建设的著名的核桃路大桥。. This invention relates to connecting devices for concrete panels, and especially to connection of precast concrete double tee floor panels. sizes with 10 ft. The double tees which make up the floor system can be either pretopped or field topped. , Feb 2012, In : Journal of Structural Engineering (United States). The need to create a parking structure that precisely fits the needs of the users can- not be stressed enough. Chart and Diagram Slides for PowerPoint - Beautifully designed chart and diagram s for PowerPoint with visually stunning graphics and animation effects. Follow Gate Precast on Twitter. 4 m (TT00X), as shown in Fig. Pretopped double tees for parking structures In pretopped double tees, carbon fibre grid replaces conventional steel mesh reinforcing in the flange, or deck. - Pretopped modules with galvanized steel press-brake-formed tub girders •System contains prestressing: - Increases complexity/cost - Limited fabricators to implement Con -Struct - Decreases skew options - Limits deck options •Plates are 3/8" thick (susceptible to corrosion). They are made either pretopped or field topped. The simulation structure is a three-story precast concrete shear wall building. to achieve design requirements. CASE STUDY. OAKVILLE, ONTARIO, GO TRANSIT PARKING STRUCTURE DESIGN/ BUILD. Double tees can be constructed in 24 in. double tee to lite wall. Pretopped precast double tees minimize the caulking and sealants necessary. Spans up to 70' can be achieved using Precast Double Tees. This paper reports the design, construction, and preliminary results of a three-story precast concrete building built at half scale and tested under input ground motions on the George B. The large single column in-verted Tee caps were held in place tem-porarily during grouting operations by four ASTM A193 B7 threaded rods in full height ducts bolted on the top sur-face of the cap. 2R-13: Design Guide for Connections in Precast Jointed Systems Author: Joint ACI-ASCE Committe 550 Subject: The proper detailing and design of precast concrete connections are essential to the performance of a precast concrete structure. Precast concrete double tee floor panels are used for forming floors and roofs in garages and other buildings. In the upper two floors, topped hollow-core slabs spanning between the gravity frames and the wall pro-vided the floor system. ) are provided at the north and south ends of the structure to provide for vertical automobile circulation, both up and down. ―Effect of Spandrel Beam to Double Tee Connection Characteristic on Precast Diaphragm Response‖, in preparation. Associate Professor of Structural Engineering. [24]ZHENG Wei,MICHAEL G Oliva. MEGA-Tee Pretopped Double Tees comprise the main traffic and parking surfaces within precast concrete parking garages, and may be used as decking and roofing elements on other structures. w o plf V/S in. 02 WORK BY OTHERS. 8 Modular Pretopped Concrete Girders These types of systems use precast beam elements that are fabricated with a portion of the deck in place as a unit and are erected side by side and connected with a CIP closure joint, posttensioning, composite concrete topping, or a combination of these. He adds that the pretopped tees offer a driving surface that many feel is as good as those made from finishes applied on site. Because C-GRID does not corrode, double tee flange degra-dation from cracking and spalling is a non-issue. 8 m) and 8 ft (2. Combinations of two building systems and four ductile frame connections adopted in the PRESSS test building effectively provide experimental verifications of seismic. Double-tee beams with the span of 18m or 24m were designed to be free of cracks under the service load, whose bearing capacity meets the requirements of ramps and floors based on the overall stiffness of the diaphragm, and was incorporated into the design drawing standard. Check pretopped double tee flange connections for weld distress or corrosion damage. 2R-13: Design Guide for Connections in Precast Jointed Systems Author: Joint ACI-ASCE Committe 550 Subject: The proper detailing and design of precast concrete connections are essential to the performance of a precast concrete structure. Vulnerability assessment and retrofit solutions of precast industrial structures precast structures;seismic assessment;seismic retrofit;industrial buildings; The seismic sequence which hit the Northern Italian territory in 2012 produced extensive damage to reinforced concrete (RC) precast buildings typically adopted as industrial facilities. The second prototype building, shown in Fig. , which creates the wearing surface in parking structures; or. [11 ] Zheng W. When speed of construction is. Precast and prestressed concrete was used for all columns, beams and pretopped tee floor units. Taracon Precast’s double tees are the ideal solution for construction projects in which the strength, beauty and flexibility of the design are critical. The parkade fire was an extreme in my mind; I don't know if we should be realistically designing for an entire parking garage to go up in flames. Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. They also wanted an open garage with few obstructions, so tenants could feel secure when coming to and leav-ing work. The test structure had a rectangular plan and incorporated a pretopped double-tee diaphragm with welded chords, a noncom-posite-topped diaphragm on hollow-core units, and a composite-topped diaphragm on double-tee floor units. With field-topped double tees, connection spacing can be up to 8 to 10 feet. 10DT26 and 10LDT26 (59k, PDF) 10DT34 and 10LDT34 (62k, PDF) 12DT30 and 12LDT30 (58k, PDF) 12DT34 and 12LDT34 (61k, PDF) Rectangular Beams. McDonald 2012 PCI/NBC PCI & PARKING: PAST, PRESENT AND FUTURE Shannon S. Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete. a composite double-tee diaphragm, the second-floor level was a noncomposite hollow-core diaphragm, and the third-floor level incorporated a pretopped double-tee diaphragm. 1 cm flange and a 7. -thick (50 mm) plant-cast flange supplemented with a 2 to 3 in. double tee to double tee, exp. 247-257 11 p. Drive aisles should be oriented perpendicular to medical center entrances as shown in the photo and diagram below. CE 00027 ISSUED FOR BID: 21 Dec 2009 Walker Parking Consultants Revision No. Precast concrete double-tees are typically fabricated with a 2-in. Vector Connector double tee flange connectors, pretopped 6,500-psi concrete double tee floors, and a new horizontal light wall system. Stair and Elevator Towers: Check handrails, stair treads and landings, metal or precast stair members, walls, and roof for deterioration. Pretopped tees have a flange thickness of 4 inches, which creates the wearing surface in parking structures. Lite wall will s. be framed with precast, pretopped double-tees supported by precast - inverted tee beams and precast light-walls. An experimental study of flange-to-flange connections of double-tees was conducted as part of the PCI-funded research effort in developing a seismic design methodology for precast concrete diaphragms. The double tee was evaluated as a simple span beam for flexure and shear. double tees, with C-GRID®carbon fiber mesh replacing conventional steel mesh flange reinforcing. This will reduce conflict between pedestrians and drivers navigating the. During the design phase, Woodland Construction of Jupiter, Fla. double tee to double tee, exp. Check pretopped double tee flange connections for weld distress or corrosion damage. Pretopped Double Tees. Double tees are used primarily as deck floor and roof components for any type of structure, including parking structures, office buildings and industrial buildings. Our new CrystalGraphics Chart and Diagram Slides for PowerPoint is a collection of over 1000 impressively designed data-driven chart and editable diagram s guaranteed to impress any audience. The interior structural frame will be made up of prestessed beams and precast columns. In order to design the double tee we have selected the section and procedure are carried and check are made for that it satisfies the condition. panel to panel. A Practical Method to Estimate Elastic?Deformation of Precast Pretopped Double-Tee Diaphragms[J]. Precast and prestressed concrete was used for all columns, beams and pretopped tee floor units. w o plf V/S in. A simply supported pretensioned pretopped double T-beam for a floor has a span of 70 ft (21. The top surface is typically broom-finished to provide improved driving traction. PCI Journal,2005,50(2):44-45. Precast Double Tees are extremely durable, sound resistance and can withstand wind, road salt, earthquakes and even fire. ―Effect of Spandrel Beam to Double Tee Connection Characteristic on Precast Diaphragm Response‖, in preparation. The parking structure is 6 levels, can accommodate 1,132 vehicles, has a width. A double grout mixer and pump ensured a constant flow of grout to the connections as high as 60 feet off the ground. DIVISION 1 - GENERAL REQUIREMENTS 2010 Parking Structure Moisture Protection -Level 5 SECTION 01010 - SUMMARY OF WORK CONTRACT NO. See Section 1-23 for more information on precast erection tolerances. The diaphragms were designed and detailed according to a new design methodology developed as part of parallel research. -thick (50 mm) flange and topped in the field with cast-in-place concrete or fabricated with a 4-in. Pretopped Double Tee Benefits & Considerations - 2 of 2. The distinctive exterior precast spandrels, which combined sandblasted and exposed aggregate finishes and inlayed tiles, were designed by the architect, in collaboration with the precaster, to simulate a runway approach. Follow Gate Precast on Twitter. original construction drawings, which indicate a field topped slab). The exterior façade of the building will be simple in nature and will utilize spandrel beams with an architectural finish and accent panels of applied brick. 2), with an in-situ topping. 2), with an in-situ topping. Drive aisles should be oriented perpendicular to medical center entrances as shown in the photo and diagram below. PCI Journal,2005,50(2):44-45. Pretopped Double Tee Benefits & Considerations – 2 of 2. Structural con-tinuity is developed by field welds. Student commuters 10. The double tee was loaded to service level, 85%, ultimate, 110% and failure. Research output: Contribution to journal › Article. Double-threaded circular helices (96-feet O. Today the pretopped alternative is the preferred and most common system with most garage designers. This weight reduction permits engineers to reduce substructure or specify smaller cranes for lifting the panels into place. By going to the double-tees, it's more cost-effective for the precaster," says Kinnell, noting that the 12-ft. double tee to lite wall. This invention relates to connecting devices for concrete panels, and especially to connection of precast concrete double tee floor panels. In order to use untopped precast double tees or hollow-core slabs as the structural diaphragm in a high Seismic Design Category design, the authors believe it to be necessary to apply ACI 318-02 Section 21. -thick (50 mm) plant-cast flange supplemented with a 2 to 3 in. ARCHITECTURAL PRECAST CONCRETE THIRD. You can access tables from previous editions of the handbook as well as the current edition. Network of Earthquake Engineering Simulation's Large High-Performance Outdoor Shake Table at the University of California, San Diego. in Civil Engineering, August 10th, 2010 Chongqing University, Chongqing, China. 5 DT = Double Tee Slab. With the field-topped system, a 3-inch-. Education University of Arizona, Tucson, Arizona Ph. Highconcrete. Each level of the test structure contained a different precast concrete floor construction technique: topped double tees on the lower level; topped hollow core on the middle floor; and pretopped double tees on the top floor. 1980年代,停车场结构中研发的双T板(Pretopped double-tees)在磨损方面表现出预制预应力混凝土构件最优化耐久性。工厂浇筑混凝土比现场浇筑混凝土更耐用,因为它能够以较低的水胶比和适宜的控制条件下进行浇筑。. double tee to lite wall. [ 4 ] Cao L,Naito C. The double tees are supported by precast spandrel beams or inverted tee beams, and precast bearing walls. Double tees with precast curbs and welded end connections for seismic performance are recommended in many areas of the country. Precast joints are sealed. -thick (50 mm) flange and topped in the field with cast-in-place concrete or fabricated with a 4-in. Serving PA, MD, NY, NJ, VA, WV & DE. They are made either pretopped or field topped. Drainage patterns are developed by varying elevations of framing and deck members. Amenities in the office building include a full service child care facility, complete in-house fitness center and a large commercial kitchen with servery and dining area. Richmond, VA. The paper provides a case study of an existing parking garage with pre-topped double tees using steel plate connecting hardware that was popular in the late 1990s through early period of the current decade (T-108). The typical sizes of double tees are up to 15 feet (4. 8 m) and 8 ft (2. panel to panel. The test structure had a rectangular plan and incorporated a pretopped double-tee diaphragm with welded chords, a noncomposite-topped diaphragm on hollow-core units, and a composite-topped diaphragm on double-tee floor units. Typically, double tees are 8, 10, 12, and 15 ft in width and can span up to 65 ft. Each level of the test structure contained a different precast concrete floor construction technique: topped double tees on the lower level; topped hollow core on the middle floor; and pretopped double tees on the top floor. 68 DESiGN GUiDE FOR BRiDGES FOR SERviCE LiFE 2. UR Team The Co-PIs are Dr. double tee to double tee, exp. They are made either: • Pretopped using a flange thickness of 4 in. The 30" deep prestressed double tee, 12'-0" wide x 4" thick flange, was evaluated to support its dead load and superimposed garage live load of 40 psf. Naito and Dr. 1 cm flange and a 7. A practical method to estimate elastic deformation of precast pretopped double-tee diaphragms[J]. single placement in the plant (so-called pretopped double tees) or using two-course construction, with an initial, 2-in. Because carbon fibre does not corrode, parking garages do not face long-term flange degradation from cracking and spalling. The Practice of Warping Double Tees.