The configuration of the connections creates a severe notch at the root of the weld that is the precipitating point for crack initiation. In the experimental program, three nonprismatic prestressed concrete double tee beams were tested. Contact strescon limited for further design and detailing information. Fatigue fractures of double tee connections typically have the following distinctive features. Oldcastle precast is the leading manufacturer of precast concrete, polymer concrete and plastic products in the united states. Double tee slabs, cast on smooth steel forms, have a finished underside. 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. 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. Designs using higher values of f c for both the double tees and topping slab are also possible. Also, the exterior walls are concrete which is much heavier than. Review load tables, details and specs of spancrete precast double tees for use in specifications for an upcoming project. Pocket joint rehabilitation cost is 28% of that of replacement.
Composite floors required for double tee, but optional for hollowcore. Roof double tee to insulated wall double tees nonbearing wall autocad. Setting the record straight on the origin of the prestressed double tee 3714 helmuth wilden, p. To download our design files to assist in your drawings, please provide your email address. Like the name implies, a precast, prestressed double tee resembles two. 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. 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. Develop a method to tie double t flanges together to get proper lateral load transfer 16. Pci bridge manual appendix b, aashtopci standard products. As directed in the contract documents, design calculations. The analytical model of the bridge consists of beam elements and a slab to connect the two tbeams.
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. The total depth of the stems was 23 and they were 46 apart see figure 1, above. Pci bridge design manual appendix b aashtopci standard products double tee beams oct 97 light sections w ft h in. Bridge system with precast concrete doublet girder and. 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. I used a topping dimension of 4 for each floor and the roof, giving a total slab depth of 6. Refer to the pdf files listed below for further information on double tees. Annotations custom slabs sample slab families mounting parts lifters and other. 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. Stresscon of colorado springs supplied the 10ftwide, 60ftlong double tee for the demonstration. The double tee was 9 wide and 60 long, spanning in the northsouth direction. Double tee flooring long span flooring the light weight.
Bridge system with precast concrete double t girder and external unbonded posttensioning yang eileen li. 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. The double t alternatives utilize slender double t crosssections, fully precast segments, and posttensioning in both longitudinal and transverse direction. A double tee or double t beam is a loadbearing structure that resembles two tbeams connected to each other side by side. The effective flange width be, is evaluated according to aci 8.
Pdf a double tee or doublet beam is a loadbearing structure that resembles two tbeams connected to each other side by side. The following pdf diagrams accompany table 1, above. 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. Double teeshas a typically range from 12 to 32 inches in depth with a typically span from 28 to 75 feet. Abstract this project developed, analyzed, and tested a method for laterally connecting the edges of double tee members in a bridge. Floor preparation will vary depending on final flooring material and finish. Double tee unit weights are per square foot of deck area. Rehabilitation of longitudinal joints in doubletee girder. In addition, several advantages and disadvantages of each of the alternative. Pci bridge design manual appendix b aashtopci standard products aashto solid and voided slab beams oct 97 dimensions inches. Precastdouble tee revit products autodesk knowledge network. 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. Excluded items related to precast and installation. This tutorial deals with a simple 2span post tensioned concrete double tbeam bridge.
One layer of steel is used in each direction of the castinplace slab with 1 clearance from bottom of slab. Double tee floor and roof oldcastle precast spokane. Double tee dimensions are based on many factors design efficiency, most popular usage, fire regulations, transportation regulations. Even without a load, the ordinary concrete beam must carry its own. Parking garages frequently utilize this costeffective solution to support vehicle loads on fewer columns to increase available parking stalls. Consider double tees for those longer spans and heavier. Various types of precast concrete slabs free download as powerpoint presentation. The precast double tees have a 2 flange with a minimum topping of 314. Hollowcore units single tee units double tee units solid concrete units beam and block floors.
Double tees are common precast flooring elements for larger projects. Review load tables, details and specs of spancrete precast double tees for use in specifications for an upcoming. A 1 integral wearing surface is deducted from effective slab depth for design. The double tee girder flange is designed to carry the load of the castinplace slab, the flange weight and a 50 lb.
Analysis and design for end effects in twisted double tees. Strength to a double tee national precast concrete. Load tests were conducted on a 27 ft span, two tee bridge in the laboratory. Wall loads are given per square foot of surface area of wall. Spans can range from 10 to 25m for floor loads to over 33m for roofs. The economy of the cpci and double t systems is compared within the framework of four sample designs. 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. 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. When installing structural precast for revit, you specify a path for the template and family files. Precast templates and families revit products 2018. Comparison of double t systems with cpci slab ongirder system 96 6. An 18 m span beam was tested under service load condition, while a m and a 20. Inverted tee beam bearing on column future expansion.
The results indicate that the double t systems are in general more. Precast double tee double t concrete slab tt beams. In this section of the report, each alternative floor system is described, followed by a sketch of the typical bay incorporating the system described. Technical drawings canadian precast prestressed concrete. Continuous joint rehabilitation cost is 57% of that of replacement.
Double tee to double tee flange connection spandrel at exterior flat column connection disclaimer. Double tee floor and roof oldcastle precast spokane resources. With more than 80 locations nationwide, our products are always close at hand. Structural precast for revit maintains its own directory of family and template files. Designs using higher values of f c for both the double tees and topping slab. Precast solutions canadian precast prestressed concrete. Consider double tees for those longer spans and heavier loads that exceed the. Double tees are also used for other long span flooring and roof applications such as athletic facilities and buildings of worship. In a double tee connection, fatigue failure occurs through the weld throat. Precastdouble tee revit products autodesk knowledge. The smooth ceiling provided by a double tee slab may require only the caulking of the longitudinal joints. This twisting may occur intentionally, such as when the bearing supports at the two ends of. 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.
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. Pdf precast prestressed concrete enjoys wide use in all types of residential. The washington state department of transportation wsdot makes these documents available on an as is basis. 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. The underside of slabs can be specified as standard grade, finish grade b and finish grade a as described in csa a23. The slab thickness, t is evaluated from the design process of the slab, a step that usually precedes the design of the beam. Precast concrete options are cast in a factory environment and include the following prestressed concrete options. Analysis and design of precast concrete structures to. Strength to a double tee national precast concrete association. Double tee flooring long span flooring the light weight solution banagher concrete double tee flooring is typically 3m wide. The weight of the double tee was calculated to be approximately 42,800 pounds. 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. Latex caulking of joints between precast slabs on the underside where exposed to view. Rehabilitation of longitudinal joints in double tee bridge girders cost estimate for.
For castinplace concrete slabs placed on clean concrete girder surface intentionally roughened. Drypacking infill of gap between precast and structure. Highdensity, large format precast concrete panels are, by themselves, resistant to air and water penetration. If a castinplace concrete topping is required, the concrete contractor will normally be required to hold finished floor. The double tee was loaded to service level, 85%, ultimate, 110% and failure. Whenever spantodepth ratio exceeds 30 for double tees a positive roof slope is. Truncated sections should be calculated individually. Close any open pgsuper projects select file program settings. Investigation of the may 23, 20 partial collapse of a.
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. Specifications download specifications about spancrete products for use in the preparation of specifications for a particular project. Double tbeam post tensioned concrete bridge sofistik. 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.
644 437 16 206 855 147 683 1650 814 1513 326 636 816 1097 1531 1086 1238 804 1476 289 77 687 731 1611 921 392 258 151 936 1086 221 147 252 952 190 1308 304 356 439 726 1411 960