To download our design files to assist in your drawings, please provide your email address. The effective flange width be, is evaluated according to aci 8. Composite floors required for double tee, but optional for hollowcore. Close any open pgsuper projects select file program settings. Double tee to double tee flange connection spandrel at exterior flat column connection disclaimer. Bridge system with precast concrete double t girder and external unbonded posttensioning yang eileen li. Designs using higher values of f c for both the double tees and topping slab. The canadian precastprestressed concrete institute cannot accept responsibility of any errors or oversights in the use of this material or in the preparation of architectural or engineering plans. Publishing these auto cad files, images and pdf files on the internet and other social media is strictly prohibited and it will be a punishable offense. Pocket joint rehabilitation cost is 28% of that of replacement. Roof double tee to insulated wall double tees nonbearing wall autocad oldcastle precast is the leading manufacturer of precast concrete, polymer concrete and plastic products in the united states. Rehabilitation of longitudinal joints in double tee bridge girders cost estimate for. Stresscon of colorado springs supplied the 10ftwide, 60ftlong double tee for the demonstration.
Fatigue fractures of double tee connections typically have the following distinctive features. Abstract this project developed, analyzed, and tested a method for laterally connecting the edges of double tee members in a bridge. I have double tee slab revit family from autodesk seek but it is rectanguler and my project is big and not stragith i have a project of mall and it is precast work. Jul, 2016 all the rights of these auto cad files, images and pdf files will be reserved only by therefore you will be able to download these auto cad files, images and pdf files for free.
Double tee floor and roof oldcastle precast spokane. I used a topping dimension of 4 for each floor and the roof, giving a total slab depth of 6. Pci bridge design manual appendix b aashtopci standard products aashto solid and voided slab beams oct 97 dimensions inches. Analysis and design of precast concrete structures to. Double tees are common precast flooring elements for larger projects. Technical hub overview plumbing engineers technicalinstallation data dimensional catalogs detail drawings revit drawings submittal forms certification letters specifications articleswhitepapers value engineering safety data sheets green building fgg chemical compatibility important safety information technical bulletins tech tools.
Bridge system with precast concrete doublet girder and. Parking garages frequently utilize this costeffective solution to support vehicle loads on fewer columns to increase available parking stalls. The configuration of the connections creates a severe notch at the root of the weld that is the precipitating point for crack initiation. Rehabilitation of longitudinal joints in doubletee girder. Double tee slabs, cast on smooth steel forms, have a finished underside. Like the name implies, a precast, prestressed double tee resembles two. Concrete delamination ledger beam undersides, double tee, column, panels overheadvertical deep concrete patch with forming corroded shear transfer plate and corroded supplemental steel double tees clean and coat, minor demo required for embedded steel inspection deck topping slab delamination upper levels. Double tee unit weights are per square foot of deck area. Excluded items related to precast and installation.
In addition, data from a laboratory test of a fullscale prototype double tee test beam conducted prior to bridge construction were compared with the data obtained from the field load test of. Spans can range from 10 to 25m for floor loads to over 33m for roofs. Also, the exterior walls are concrete which is much heavier than. Develop a method to tie double t flanges together to get proper lateral load transfer 16.
A double tee or double t beam is a loadbearing structure that resembles two tbeams connected to each other side by side. Floor preparation will vary depending on final flooring material and finish. Precast templates and families revit products 2018. All the rights of these auto cad files, images and pdf files will be reserved only by therefore you will be able to download these auto cad files, images and pdf files for free. One layer of steel is used in each direction of the castinplace slab with 1 clearance from bottom of slab.
Review load tables, details and specs of spancrete precast double tees for use in specifications for an upcoming. Consider double tees for those longer spans and heavier. An 18 m span beam was tested under service load condition, while a m and a 20. The precast double tees have a 2 flange with a minimum topping of 314. Oldcastle precast is the leading manufacturer of precast concrete, polymer concrete and plastic products in the united states.
Double teeshas a typically range from 12 to 32 inches in depth with a typically span from 28 to 75 feet. Continuous joint rehabilitation cost is 57% of that of replacement. Double tee flooring long span flooring the light weight. The designing team, structural engineers and architects, works together to find the best possible solution that will fulfill the owners whishes. Analysis and design for end effects in twisted double tees. Pdf a double tee or doublet beam is a loadbearing structure that resembles two tbeams connected to each other side by side. Designs using higher values of f c for both the double tees and topping slab are also possible. Precast concrete options are cast in a factory environment and include the following prestressed concrete options. The underside of slabs can be specified as standard grade, finish grade b and finish grade a as described in csa a23. The analytical model of the bridge consists of beam elements and a slab to connect the two tbeams. The strong bond of the flange horizontal section and the two webs vertical members, also known as stems creates a structure that is capable of withstanding high loads while having a long span.
The total depth of the stems was 23 and they were 46 apart see figure 1, above. The highly popular double tee slab system is an excellent choice for an economical, dependable floor or roof system on other types of structures, as well. This tutorial deals with a simple 2span post tensioned concrete double tbeam bridge. The washington state department of transportation wsdot makes these documents available on an as is basis. In flatplate floors, slab column connections are subjected to high shear stresses produced by the transfer of the internal forces between the columns an d the slabs. As directed in the contract documents, design calculations. Pci bridge manual appendix b, aashtopci standard products. Analysis and design for end effects in twisted double tees 40 pci journal precast concrete double tees are designed to carry vertical load by bending, but they are sometimes also subjected to torsion. The slab thickness, t is evaluated from the design process of the slab, a step that usually precedes the design of the beam. Precastdouble tee revit products autodesk knowledge network.
Roof double tee to insulated wall double tees nonbearing wall autocad. Inverted tee beam bearing on column future expansion. Precastdouble tee revit products autodesk knowledge. In this section of the report, each alternative floor system is described, followed by a sketch of the typical bay incorporating the system described. The results indicate that the double t systems are in general more. Double tee flooring long span flooring the light weight solution banagher concrete double tee flooring is typically 3m wide. When installing structural precast for revit, you specify a path for the template and family files. I have double tee slab revit family from autodesk seek but it is rectanguler and my project is big and not stragith i have a. The double tee was loaded to service level, 85%, ultimate, 110% and failure. Comparison of double t systems with cpci slab ongirder system 96 6. All unhighlighted values in the spanload tables use f ci 4000 psi at release and f c 6000 psi at 28 days. Analysis and design of precast concrete structures to eurocode 2.
Strength to a double tee national precast concrete. Double tees have evolved from 1220mm 40 widths to 2440mm 80, 3000mm 100 and 3660mm 120. For composite double tees, the strength of the topping at 28 days is a minimum 3000 psi. Double tee dimensions are based on many factors design efficiency, most popular usage, fire regulations, transportation regulations. The economy of the cpci and double t systems is compared within the framework of four sample designs.
In the experimental program, three nonprismatic prestressed concrete double tee beams were tested. Latex caulking of joints between precast slabs on the underside where exposed to view. The double tee was 9 wide and 60 long, spanning in the northsouth direction. The double t alternatives utilize slender double t crosssections, fully precast segments, and posttensioning in both longitudinal and transverse direction. Precast solutions canadian precast prestressed concrete. 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. Strength to a double tee national precast concrete association.
Even without a load, the ordinary concrete beam must carry its own. Whenever spantodepth ratio exceeds 30 for double tees a positive roof slope is. The smooth ceiling provided by a double tee slab may require only the caulking of the longitudinal joints. Contact strescon limited for further design and detailing information. This twisting may occur intentionally, such as when the bearing supports at the two ends of. For castinplace concrete slabs placed on clean concrete girder surface intentionally roughened. Investigation of the may 23, 20 partial collapse of a.
The following pdf diagrams accompany table 1, above. Hollowcore units single tee units double tee units solid concrete units beam and block floors. Double tees are also used for other long span flooring and roof applications such as athletic facilities and buildings of worship. All warranties and representations of any kind with regard to said documents are disclaimed, including the implied warranties of merchantability and fitness for a particular use.
The double tee girder flange is designed to carry the load of the castinplace slab, the flange weight and a 50 lb. In addition, several advantages and disadvantages of each of the alternative. The weight of the double tee was calculated to be approximately 42,800 pounds. Load tests were conducted on a 27 ft span, two tee bridge in the laboratory. Review load tables, details and specs of spancrete precast double tees for use in specifications for an upcoming project. Inverted tee beam bearing on column future expansion pdf dxf. Deck bulb tees ubeam voided slab box beam double tee multiweb tees wsdot publishes libraries and templates that are based on the aashto girders defined in the pci bridge design manual. Refer to the pdf files listed below for further information on double tees. Setting the record straight on the origin of the prestressed.
Precast double tee double t concrete slab tt beams. In a double tee connection, fatigue failure occurs through the weld throat. Specifications download specifications about spancrete products for use in the preparation of specifications for a particular project. With more than 80 locations nationwide, our products are always close at hand. Annotations custom slabs sample slab families mounting parts lifters and other. Double tbeam post tensioned concrete bridge sofistik. Drypacking infill of gap between precast and structure. Various types of precast concrete slabs free download as powerpoint presentation. Double tee wall panels double tee wall panels 37k, pdf hollowcore wall panels hollowcore wall panels 30k, pdf precast, prestressed columns 12x12, 14x14 42k, pdf 16x16, 18x18, 20x20, 24x24 48k, pdf precast, prestressed columns 89k, pdf precast, prestressed solid wall panels. Setting the record straight on the origin of the prestressed double tee 3714 helmuth wilden, p. Technical drawings canadian precast prestressed concrete. Pci bridge design manual appendix b aashtopci standard products double tee beams oct 97 light sections w ft h in.
Double tee floor and roof oldcastle precast spokane resources. If a castinplace concrete topping is required, the concrete contractor will normally be required to hold finished floor. A 1 integral wearing surface is deducted from effective slab depth for design. Truncated sections should be calculated individually. Structural precast for revit maintains its own directory of family and template files. Highdensity, large format precast concrete panels are, by themselves, resistant to air and water penetration. Pdf precast prestressed concrete enjoys wide use in all types of residential.