Spacious Tiled Kitchen ... a kitchen, a lounge , a dining area and a full bathroom. We are the only company in the Western Cape that manufactures high quality twin side colour panels in a rustic, broken brick and roman brick finish. Parking garages, office buildings, commercial buildings, gymnasiums, pool roofs, food processing plants, paper mills, industrial buildings, and sewage and water treatment plants are all ideal applications. parking garage is relatively a  new three-level precast parking garage for customers. The double tee was loaded with 4,400-lb highway barriers for the five different loading phases, where the factored service load was determined to be 29,300 lbs. Precast Prestressed Concrete Parking Structures: Recommended Practice for Design and Construction PCI COMMITTEE ON PARKING STRUCTURES Greg Force, Chairman Michael Crowley James T. Engle Gregory B. Gibbons Charles Magnesio Rita Seraderian Ron Schlerf Al Schoener Monica Schultes William E. Whitcher PCI COMMITTEE ON PARKING MARKETING & PROMOTION Precast concrete elements produced by union craftsmen in Clark Pacific’s PCI-Certified manufacturing facilities achieve greater strengths and tighter production tolerances, and produce higher quality finishes than any of their cast-in-place equivalents. Another option is to also contact one of our member engineering services for assistance. With their efficient cross section and high section modulus, precast double tees have been designed to span 80 ft or more. standard passenger-car flange connectors were specified and used for both roof and Engineers, precasters and students alike gathered in April 2014 at Colorado Precast Concrete in Loveland, Colorado, to find out. beam to column. A full-size 10DT24+2 double tee (see “Decoding the double tee”) designed for a typical parking garage floor member was load tested to determine performance. We manufacture and install precast concrete walls, paving and other structures; e.g. Shear Save my name, email, and website in this browser for the next time I comment. These articles describe raising double tee beams to replace the worn bearing pads within parking garage structures. Double T ee Flange Connections – Ana ... that c ommonly perform inspections and evaluations of precast parking garages. The parking garage is relatively a new three-level precast parking garage with pre-topped double-T decks. We manufacture and sell vibracrete slabs for DIY purposes. Thank you. double tee to lite wall. It provides approximately 330 parking spaces for customers. are technical services engineers with NPCA. Review load tables, details and specs of Spancrete precast double tees for use in specifications for an upcoming project. column to foundation. Precast con-crete structures are economical, can be constructed relatively quickly, and make use of in-plant quality control processes to ensure consistency in the concrete material properties, curing documents for the parking garage, assisted the owner with bidding the project, and flanges, and high chloride levels for both elevated ... double tee to double tee, exp. Stresscon of Colorado Springs supplied the 10-ft-wide, 60-ft-long double tee for the demonstration. This guide will provide information regarding the shoring strength and load factors. Parking Garage Footprint - Bay Size: 36 ft. x 60 ft. Review of the construction documents revealed that the design of the roof deck was double tee to P.I.P. stainless steel connectors were failed along the welds. Structure Evaluation Engineers, Inc. (SEE) was retained to peer review an engineering evaluation report and provide a second opinion regarding repair options and recommendations. However, no explanation was given why • ... tion in a precast parking garage. Prestressing tendons are situated in the forms and are stressed prior to casting. changed during the construction to allow emergency fire trucks over the roof deck. As a side note, I found two articles of possible interest for you: Bearing Pad Durability in Precast Concrete Garages and Parking Structure Restoration/Bearing Pad Replacement. Parking garages, office buildings, commercial buildings, factories, industrial buildings, etc., are all ideal applications. No matter what the application, double tees are spanning longer distances and performing at higher levels than ever before. Conventional reinforcing steel is then placed in the flange to resist tensile stresses. (SEE)  was retained to peer review an engineering Is there an existing NDT (Non-Destructive Test) for Precast Prestressed slab? SEE provided Fig. The rhythmic thumping of tires while driving through a precast parking garage is a familiar experience of modern life. of deflection and 1 in. Slabs can be cantilevered at one or both ends for up to 4 times the slab depth. Stresscon of Colorado Springs supplied the 10-ft-wide, 60-ft-long double tee for the demonstration. Evan Gurley and Kayla Hanson, P.E. A full-size 10DT24+2 double tee (see “Decoding the double tee”) designed for a typical parking garage floor member was load tested to determine performance. The Precast Double Tee is right at home anywhere large open spaces are required. This document from the Scaffolding, Shoring & Forming Institute also includes other references of interest. garages, carports, domestic quarters, etc in Cape Town. V ery nice entrance with a spacious Lounge. High Quality CPCI members supply precast concrete compo-nents certified to the CPCI Certification Program for Structural, Architectural and Specialty Precast In with pre-topped double-T decks. Double Tee-to-Lite Wall . With its heavy load resistance and incredible span length, our Double Tees are in high demand. The double tee finally reached the failure phase when 20 barriers (88,000 lbs) were loaded, causing the double tee to deflect more than 44 in. The reinforcing steel also helps resist flexural stresses from out-of-plane loads and provides protection from drying shrinkage cracking. evaluation report and provide a second opinion regarding repair options and recommendations. Information regarding shoring design can best be found within the ACI 347.2R-05, “Guide for Shoring/Reshoring of Concrete Multistory Buildings.”. The adjacent beams resist this deflection through individual connections located along the joint between the beam flanges. Waterproofing membranes can also be used to protect the double tee from water penetration. The An NPCA technical services engineer is going to contact you via email to get some more clarification about what specific test you need. Faster fabrication and erection, speeding up the construction process compared to cast-in-place structures. Long version 36m² - 5,82m wide x 6,24m deep. they failed. the meantime, the ownership approved to proceed with other repairs that included improvement of stainless steel connectors were failed along the welds. Sounds like an interesting project you are working on. typical electrical case double tee . Multilevel parking garages or car parks are buildings which are specifically intended to park vehicles. Simplified frame, design and construction. Thanks Rex for the inquiry. Jason Reigstad is on a crusade to warn about lurking danger in more than 100 parking garages, each with an underdesigned—and non-code-complaint—precast double-T slab system. double tee to lite wall. ramp expansion joint . Double Tee-to-Spandrel . Structure Evaluation Engineers, Inc. © 1994-2021 Structure Evaluation Engineers, Joints in Precast Parking Structures For many years, precast concrete has been a mainstay in the construction of aboveground parking structures. connectors immediately and not to allow trucks over the roof until appropriate repairs are done. While performing pre-construction services on a precast parking garage for a forensic engineer, a large crack was noticed at the mid-span of a double tee stem in a parking garage. Be the first to know when a new issue is available online. The cost of maintenance is so much higher on a Precast double tee deck. Higher durability and sound resistance, including the ability to withstand wind, road salt, earthquakes and even fire. Quality Control Manual for Precast Concrete Plants, NPCA Manual for Jointed Precast Concrete Pavement, Guide for Shoring/Reshoring of Concrete Multistory Buildings, Bearing Pad Durability in Precast Concrete Garages, Parking Structure Restoration/Bearing Pad Replacement, 2018 – Water and Wastewater Special Issue, Span length: 25-55 ft (up to 80 ft or more). By providing your email address, you are agreeing to receive emails from NPCA. Each double tee’s flange is cantilevered from the stem. The ground level is slab on grade parking, a small electrical room, and secure bike storage. Structural Peer Review and Design, Preparation The following response is from Eric Carleton, P.E., director of codes and standards. Double tees offer plenty of flexibility in design and construction, where they are an ideal choice for structures requiring long, uninterrupted spans and high load carrying capabilities. Repair programs can be designed as phased projects in order to limit the impact of the repair on tenants. Inc. The original evaluation report indicated that some of the double-T flange The double tee was loaded to service level, 85%, ultimate, 110% and failure. While precast concrete parking garages are stand-alone buildings, they can be used in innovative ways to accomplish project objectives. I forward your question to our Technical Services engineers. intermediate levels. What is the biggest in dimension pre-cast concrete double tee that is available in the market?? © 2021 National Precast Concrete Association. Plan on spending 100,000 or more per year after year 5 on maintenance of joints, cracks, sealant, connections etc for a 5 story parking … Our Double Tees are resistant to deterioration from weather; they posses a natural fire resistance and are well suited for our hurricane prone area. Non-Destructive tests do exist. The following PDF diagrams accompany Table 1, above. Thank you for the comment Asif. Testing procedures closely followed those found in Chapter 20 of ACI 318, “Building Code Requirements for Structural Concrete,” except for the 24-hour applied load time and the response measurement, which were a result of time restrictions. T-to-T joint sealants, failed expansion joints, differential elevation between adjacent double-T jt. provided This home is secure with precast wall and a double garage. I’d be happy to forward your questions to our Technical Services engineers. The integral design provides a stiffer member, while the material-saving shape reduces the dead load. and touch the ground. Precast IT‐ Beams, L‐Beams and R‐Beams will be taken off by length in linear feet and piece count. When loading the double tee at 85% of ultimate, 1 in. Double Tees are also used for other long span flooring and roof applications such as athletic facilities and buildings of worship. structural peer review and condition assessment, prepared the repaired bid SEE found out that the same Thank you for the comment m.asif khan. This compression shortens the lower section of double tee, resulting in upward camber, which counteracts dead loads, live loads and creep deflection. Once the double tees are welded together, the double tee joints are treated and, if applicable, toppings are applied. Adja-cent precast concrete tee beams are Your email address will not be published. Lafarge offers a variety of solutions that are ideal for warehouses, manufacturing plants, schools, retail, office buildings, recreational facilities, hotels/motels, multi-family residential, parking garages, bridges, and infrastructure, plus virtually any other application that calls for strength, durability, beauty, sustainability and fast-track construction. How much deflection allow in double.tee after screed or any liveload ,roofload design base. surface drainage. He also emailed you directly his response as well. Thank you for your comment asif. decks. with pre-topped double-T decks. 1: A partially-completed precast concrete parking structure consisting of key components including columns, double tees, inverted tees, and shearwalls made for connection requirements, sealant requirements, and crack-control requirements. Would you be able to explain a bit more about your project? parking garage is relatively a  new three-level precast parking garage This home has a single garage with 2 extra parking spaces! CECO’s cast-in-place park-ing structures have no joints to jostle your vehicle as you park. was retained to peer review an engineering As the wheel traverses each beam, load is applied, and the double-tee beam deflects downward (Figure 1). of rebound was recorded when barriers were removed. Double tees are generally manufactured on pretensioning beds ranging from 200-500 ft long, although some producers use beds of different lengths. It provides  approximately 330 parking spaces After the concrete cast into the forms reaches a specified compressive strength, the tendon ends are cut, placing the stems in compression. What happens when 4,400-lb highway barriers are placed on top of a 10-ft-wide, 60-ft-long precast, prestressed concrete double tee? Double garage: Short version 33m² - 5,82m wide x 5,66m deep. they failed. Can HVAC openings be cut through the top flange? SPI Double Tees will provide reliable long term performance as roof, floor and parking garage structural members. Double Tee slabs are made with G50 concrete and ½” strands ASTM A416 as standard, each double Tee slab is normally 2400mm wide. These tendons consist of high tensile strength cables, typically of multiple strands. Your email address will not be published. New Brunswick Gateway Transit Village Garage New Brunswick, New Jersey 697 vehicles, 278,000 square feet, 10 levels. Double Tees are also left exposed in parking garages or long span applications to display the very smooth and attractive concrete finish that is possible in a precast plant. By choosing to continue, you agree to the terms in our privacy policy. Open air stair towers are located along the west side of the structure to provide pedestrian access to each level. Beds are manufactured in the same orientation as double tees are to be installed in the field (the stems and lower surfaces of the flange are form finished and the top surface is finished manually). Ongoing repair of a precast double-tee beam flange and connection. panel to panel . Double Tee-to-Double Tee . clean surface. If you would be able to provide some more information regarding your project and concern, I’d gladly forward that to our technical services engineers for assistance. How can we will stressing with hydraulic jack without gauge and with using strand length. Is the full top flange used in the design, or just a portion of it? How much chamber will be in 50’long double tee. oversaw the construction. Total cost of DIA precast parking structure repairs and maintenance from 2000 to 2010: $22,261,774, or $1,712.44 per space (Construction was completed in 1995) ... mon of a precast structure due to the “double t” design of precast garages. oversaw the construction. Inspect bearing pads at ends of precast double tee beams for defects. There are three main types of parking deck structural inspections; precast parking concrete structures (the most common), cast-in-place concrete parking structures and steel parking structures (the least common).Parking structures are typically designed to have a service life between 30 and 50 years. Hey,good article and information given by you for Strength to a Double Tee. The SRP Parking Garage project is a 4-story precast parking structure on drilled caisson foundations. This type of construction was originally intended for buildings and parking garages, but has been integrated into the design of highway structures as well. Double tee slabs are resistant to moisture and corrosion. Parking Garages frequently utilize this cost-effective solution to support vehicle loads on fewer columns to increase available parking stalls. Parking Garages Structures. Precast/Pre‐topped Double Tees will be taken off by the top surface area in square feet and piece count. Commonly used for large structures like parking garages, gymnasiums and indoor pool areas, it also is the perfect fit for smaller applications like pedestrian bridges. (SEE). Would like to know how much of a camber there is on a 50 foot long and 24 inch in depth double tee? Photos show the placement of the shoring bearing along the bottom flange. The Other options are available on request. Filed Under: Precast Solutions Magazine, 2014 – Fall, Precast Magazines, Strength to a Double Tee Tagged With: Compressive Strength, prestress, strength, testing. , details and specs of Spancrete precast double tee resembles two side-by-side capital letter Ts among parking designers! It also cautions about protecting the shoring strength and load factors specifications an. Of Colorado Springs supplied the 10-ft-wide, 60-ft-long double tee is right at home anywhere open!, earthquakes and even fire spaces are required were loaded on the double tee ’ s park-ing. Regarding shoring design can best be found within the aci 347.2R-05, “ Guide Shoring/Reshoring., if applicable, toppings are applied Ana... that c ommonly inspections! The welds with weights corresponding to the five different phases double t precast parking garage load resting on the double tee held. Higher durability and sound resistance, including the ability to withstand wind road! The parking garage, depending on the layout of the double-T flange steel. The layout of the legs/stems allows the double tees are welded together, the ends... Are situated in the market? of ultimate, 110 % and failure side! Slabs can be used to protect the double tees have been designed to span 80 or... Receive emails from NPCA long double tee ’ s flange is cantilevered from the Scaffolding, &! Use beds of different lengths still held together despite nearly double t precast parking garage the calculated service load resting the. Resembles two side-by-side capital letter Ts, a precast double-tee beam deflects (... Know when a new three-level precast parking structure on drilled caisson foundations install precast garages... Tee still held together despite nearly triple the calculated service load resting on the of... One or both ends for up to 4 times the slab depth inspect bearing within... Bearing along the welds the impact of the shoring strength and load factors building was placed top... Resistance and incredible span length, our double tees are also used for other long span flooring and applications... This cost-effective solution to support vehicle loads on fewer columns to increase available parking stalls the deck or.... Concrete in Loveland, Colorado, to find out placing the stems compression... The following response is from Eric Carleton, P.E., director of codes and.... My name, email, and secure bike storage by providing your email address, you are on... The beam flanges withstand wind, road salt, earthquakes and even fire, 278,000 feet... X 5,66m deep buildings of worship salt, earthquakes and even fire 10 levels the combination of robust steel. Beds of different lengths home is secure with precast wall and a double tee still held despite! Precast double tees are common precast flooring elements for larger projects in our privacy policy double... A camber there is on a 50 foot long and 24 inch in depth double tee is at... Strength, the ownership approved to proceed with other repairs that included of. Camber there is on a 50 foot long and 24 inch in depth double tee for the demonstration parks buildings. Garage required our project manager to develop a creative double … Fig new three-level precast parking garage structural members,... Response as well on drilled caisson foundations the structure to provide pedestrian access each! And a full bathroom relatively a new three-level precast parking garage Footprint - Size! Little maintenance throughout the life of the structure to provide pedestrian access each. No explanation was given why they failed conventional reinforcing steel and the horizontal section is known as wheel! To know how much chamber will be in 50 ’ long double tee for the demonstration longer distances and at... Garage Footprint - Bay Size: 36 ft. x 60 ft area a! Factor engineered into the forms and are stressed prior to casting beam flanges, details and specs of Spancrete double! Structure to provide pedestrian access to each level called webs or stems the... Jostle your vehicle as you park home has a single garage: Short version 33m² - wide. Our precast/prestressed concrete double tee slabs are resistant to moisture and corrosion innovative ways to project. Utilize this cost-effective solution to support loads over long spans s flange is cantilevered from the Scaffolding shoring! Sound resistance, including the ability to withstand wind, road salt, earthquakes and even fire and! Are applied resistance, including the ability to withstand wind, road salt, earthquakes even. A specified compressive strength, the double tees are welded together, the tendon ends are cut placing. Garage required our project manager to develop a creative double … Fig will with! Brunswick, new Jersey 697 vehicles, 278,000 square feet, 10 levels design provides stiffer... Directly his response as well, director of codes and standards to accomplish project objectives each level an project... Jack without gauge and with using strand length even fire ft or more the forms reaches a specified compressive,. And even fire you agree to the five different phases more about your project a 10-ft-wide 60-ft-long... Design of the double-T flange stainless steel connectors were failed along the west of! One of our member engineering services for assistance flange is cantilevered from the stem 1. Elements for larger projects loads on fewer columns to increase available parking stalls strength! Dimension pre-cast concrete double tee for the demonstration repair the connectors immediately and not allow... Impact of the shoring strength and load factors toppings are applied carports, domestic quarters, etc Cape... A 50 foot long and 24 inch in depth double tee was loaded to service,... On grade parking, a precast double-tee beam deflects downward ( Figure 1 ),... Other repairs that included improvement of surface drainage that the same Standard passenger-car flange were! Office buildings, etc., are all ideal applications caisson foundations in depth double tee slabs are to. Although it was deemed failed, the tendon ends are cut, placing the stems in.... Tiled Kitchen... a Kitchen, a precast double-tee beam deflects downward ( 1. Director of codes and standards stair towers are located along the joint the... Tables, details and specs of Spancrete precast double tee resembles two side-by-side letter. A creative double … Fig aci 318 – building Code Requirements for concrete! Use beds of different lengths, they can be cantilevered at one both! Sell vibracrete slabs for DIY purposes by providing your email address, you are agreeing to emails! Different phases in the flange to resist tensile stresses there an existing NDT ( Non-Destructive test ) for prestressed. Membranes can also be used to protect the double tee slabs are resistant to moisture and.. Why they failed new three-level precast parking garage structures if applicable, toppings are applied is to. Were loaded on the layout of the repair on tenants, precasters and alike. Be cantilevered at one or both ends for up to 4 times the slab.! The stems in compression that c ommonly perform inspections and evaluations of double! Standard 19m² - 3,06m wide x 6,24m deep area and a double tee is! Bay Size: 36 ft. x 60 ft waterproofing membranes can also be used the! Despite nearly triple the calculated service load resting on the double tee still held despite. Prestressed slab another option is to also contact one of our member engineering services for assistance the roof until repairs... The application, double tees have been designed to span 80 ft or more ground level is slab on parking! Your project material-saving shape reduces the dead load no matter what the application, tees...: Short version 33m² - 5,82m wide x 6,24m deep including the ability to withstand wind, salt. Concrete in Loveland, Colorado, to find out your question to our Technical services engineers together despite nearly the... Or both ends for up to 4 times the slab depth surface area in square feet and piece count for! Ever before of it wind, road salt, earthquakes and even fire to resist stresses... Footprint - Bay Size: 36 ft. x 60 ft beam deflects downward ( Figure 1 ) a garage protecting. Garage required our project manager to develop a creative double … Fig the welds although some producers use beds different... Level, 85 % of ultimate, 110 % and failure than happy to answer your questions our! Forward your questions to our Technical services engineers questions as well surface area in feet! Is right at home anywhere large open spaces are required and other structures ; e.g buildings commercial... Used for other long span flooring and roof applications such as athletic facilities and buildings of.. Prestressed concrete double t precast parking garage tee was loaded to service level, 85 % ultimate! The product Colorado Springs supplied the 10-ft-wide, 60-ft-long double tee to support loads. Tee ’ s cast-in-place park-ing structures have no joints to jostle your as! Short version 33m² double t precast parking garage 5,82m wide x 6,24m deep that some of the repair tenants. Times the slab depth diagrams accompany Table 1, above, “ Guide for Shoring/Reshoring of concrete Multistory Buildings... Here, a dining area and a full bathroom strength to a double tee resembles two side-by-side letter!, toppings are applied top surface area in square feet, 10 levels each double tee resembles side-by-side!