Revit 2019 precast automation for lattice girder slabs. Planning software for the production of filigreelattice. One such method is the use of precast concrete lattice girder slabs, or filigree slabs, as an alternative to insitu flat slab construction. Description lattice girders are threedimensional, industrially prefabricated reinforcing elements. The most commonly used type of slab used along is the lattice girder slab. It consists of a single 65mm precast concrete leaf, with a projecting lattice girder. The objective of this work was to analyze and evaluate the situation at construction sites using lattice girder slabs, addressing the issues of design, manufacture and construction procedures con.
Precast automation for lattice girder slabs youtube. Effectiveness of lattice girders bft international. Application and use of this information requires design by a registered professional structural engineer. Structural performance of precast concrete lattice girder.
Pantex lattice girders have been developed for special demands in the field of tunneling. Pdf lattice girder floor slabs tested application as a. They can be assembled from small pieces and are particularly advantageous where site access is difficult. Precast omnia floor slab precast concrete product keegan precast. When the order is placed, the lattice girder height h, lower chord diameter lc, upper chord size uc and diameter of diagonals d are specified. First, we have the precast lattice girder slabs which are one of the most.
The units are typically 50mm to 100mm thick and 1200mm or 2400mm wide. Therefore lattice girders are best suited when slab. Pdf lattice girder floor slabs tested application as a point. The top reinforcement mat is placed on site along with a layer of stitching reinforcement across the joint between slabs, prior to pouring the insitu concrete. They consist of an upper chord and two lower chords and continuous truss wires. A discussion of overall truss design considers primary analysis, secondary stresses, rigorous elastic analysis, cross braced trusses and truss deflections. The safe use of these precast slabs with insitu topping as doubleaxis stressed slabs has been sufficiently proven through examinations. We inform design and construction professionals, supply design tools and details, and assist the engineer of record on an as needed basis. The pantex system has been extensively tested and used successfully for numerous tunnel projects throughout the world. You can also make the section properties vary along the length of the girder.
The market for lattice girders in the construction industry grows continously worldwide. Sketch additional girders onto a girder slab by clicking beginning and end points. Lattice girder floor slabs tested application as a pointsupported slab. The design of crosssections subject to combined bending, shear and axial force is covered in clause 6. The lattice girder provides rigidity to the slab when insitu concrete is poured onsite by a local provider. The intake slab formwork elements also consisted of peri system components featuring gt 24 lattice girders, sru steel walers and rcs rails. Our designdrawing department uses the latest software by allplan. The component sections may typically include metal beams, channel and angle sections, with the lacing elements either metal plate strips, or angle sections.
Lattice girders are threedimensional, industrially prefabricated reinforcing elements. Some modules interact with the frame analysis and single span beam analysis, allowing you to effortlessly postprocess analysis results. Product brochures dimensioning software technical guideline insulation. Avi lattice girders lattice girders lattice girders for half slabs special girders lattice girders with the complete reinforcement required for residential buildings girders with german approval advantages of the product secures the bonding between precast slabs. After reading this article you will learn about the design of slab and girder bridges. From the results in this study, it was concluded that the studied detailing of.
This means clashes are avoided during the design and detailing. They showed that the loadcarrying capacity of a slab depends on the rotation capacity of the lattice girder joints. Creating a post and beam structure chief architect software. They showed that the loadcarrying capacity of a slab depends on the rotation capacity of the lattice girder. Precast concrete lattice girder flat slabs are designed and manufactured in accordance with european standards 1,2 but the importance of the various design parameters in precast lattice girder floor systems are not fully understood 3. Slightly different but with the same efficiency you can plan in an optimized way the filigrees on the tables. Versitile, cost effective precast omnia slab flooring. The filigree slab is a hybrid, semifinished slab construction with lattice girders. They are cast with most, if not all, of the bottom reinforcement required. Omnia slab is a reinforced precast concrete slab incorporating a triangular lattice girder that is attached to a lower layer of reinforcement. In the same range of production planning, floordesk offers also a module for carrousel planning for the production of filigreelattice girder slabs. Lattice girder slabs function a floor system that serves as an alternative to conventional concreteinplace floors, in which a prefabricated slab with reinforcement serves as a permanent formwork for the. Therefore, it is recommended that the rotation capacity is not limited by the horizontal cast joint. The growing demand of girders draws a need for girder.
Lattice girder article about lattice girder by the free. However, provided the shear force ved is less than 50% of the design plastic shear resistance vpl, rd and provided shear buckling is not a concern then the crosssection need only satisfy clause 6. For structural engineering services in massachusetts and new hampshire please go to my web site. On the general panel, change the room type to slab so there is no additional flooring on top of the slab foundation. The load bearing behaviour of these semiprecast slabs with lattice girders is similar to in situ concrete slabs. The diagonal lines of steel give support in all directions, helping to prevent the girder, which is one of the main support elements in a bridge design, from bending. Use of lattice girders in reinforcedconcrete floor plates is a widely practiced method of construction for conventional highrise building structures.
The lattice girder is manufactured using high strength steel wire. Pdf laboratory testing of the structural behaviour of. Lattice girder slabs act as permanent formwork and as precast soffits for robust, high capacity composite floor slabs they are cast with most, if not all, of the bottom reinforcement required. Click structure tab model tab component dropdown place a component. Fabrication, construction and assembly of the girderslab system and dbeam girder shall be in conformance with the girderslab system design guide v3. Dibt include ald truss girders for precast slabs with structural insitu concrete. Lattice girder elements, pilot experiment, bending, design and analysis method. For bridges, trusses can be economic for spans of 30m to 200m. Lattice beam and block slabs the complete ital concrete lattice beam decking system is based on a european concept in use for more than 50 years. This new version of the precast for revit app now allows precast projects using lattice girder slabs. Autodesk 2d and 3d design and engineering software. Product brochures dimensioning software technical guideline insulation values.
Next, navigate to build floor build foundation from the menu. All reinforcement used in manufacturing uses multicycled steel. Structural engineers are asked to add the girder slab system specification guide to their general notes. These are connected to the chords by means of electric resistance welding. This type of girder is a stocked product and therefore available at short notice. It is a semiprecast floor system consisting of a precast panel with a minimum thickness 40 mm, a lattice girder wire trusses, and bottom reinforcement. Analyses of whole slabs were carried out to investigate the demands of the deformation capacity of the lattice girder joint. Girder design example of a first floor girder youtube. Kg produces lattice girders and is active in the area of semiprecast elements for over 60 years.
Revit wall, floor and roof object style common edges, hidden lines and line weights cadclips duration. An estimated 70 % of all floors in these structures are executed with lattice girder. Current european standards force engineers to design the bending ultimate limit state design the floor slabs with lattice girders by applying en 199211. The lacing elements are typically attached using either hot rivets or threaded locator bolts. The lattice girder slab consists of a thin precast concrete plank. Precast concrete lattice girder slabs consist of a. Girder slab technologies can help you determine whether or not the girder slab. Lattice girder slabs act as permanent formwork and as precast soffits for robust, high capacity composite floor slabs. It replaces conventional insitu slab systems with the associated problems of decking and support work and can easily be erected by unskilled labour. Flat slabs are manufactured costeffectively from prefabricated slabs with lattice girders and a castinsitu concrete topping. Girder slab technologies, llc 3 myers drive suite 10 mullica hill, nj 08062 phone. Lattice girder slabs act as permanent formwork and as precast soffits for robust, high capacity composite floor slabs they are cast with most, if not all, of the bottom reinforcement.
The lattice girder slab consists of a thin precast. Pdf realtime monitoring of concretelatticegirder slabs. In the type selector at the top of the properties palette, select girder slab lattice girder. The top reinforcement mat is placed on site along with a layer of stitching reinforcement across the joint between slabs. Revit precast lattice girder is read only autodesk community.
The new autodesk structural precast extension for revit 2019 blogs. In the work plane dialog, select pick a plane and click ok. The new autodesk structural precast extension for revit. The lattice girder is manufactured using high strength steel wire which provides rigidity to the panel and enables it to bind easily with insitu concrete which is poured later on site.
Manually add lattice girders into girder slab assemblies. Pdf laboratory testing of the structural behaviour of precast. Multiflex the flexible girder slab formwork for all ground. The omnia slab is a reinforced precast concrete slab which incorporates a lattice girder to provide stiffness and facilitate the placement of the top mesh. The main bottom floor reinforcement is contained within the precast concrete leaf. The prokon structural analysis and design suite includes a number of modules with which you can design most types of steel members. Revit precast lattice girder is read only hello, i need a lattice girder similar to the one that comes with the structural precast extension in revit 219 with the difference being that the default branches out into 2 bottom chords when i just need a straight top chord and bottom chord girder. Girder slabs are now part of the precast automation process, following similar.
In the build foundation dialog, move the radio button under foundation type to monolithic slab and click ok. Each item which is due to be casted into the panels, inclusive of the reinforcement and lattice girder, are detailed at this stage. The lattice girders are used mainly as reinforcement of prefabricated slabs and beams, where concreting is performed in two stages, offering the advantage of avoiding scaffolding and formwork needed in traditional construction. Jan 25, 2018 hello there sepakistan, im designing a long span structure for roof, this just an alternative instead of using peb. Precast design department bespoke designs precast walls. Girder slabs are now part of the precast automation process, following similar configuration r. Cad planning of precast floor slabs with autocad concrete plant. Pantex lattice girders ensure an immediate support in the open span area.
Lattice girder floor slabs concrete plant precast technology. Flooroffice, the complete and fully integrated software solution for hollowcore flooring and precast industries, supports all types of prefab floors. Lattice girder dss cup lock scaffold ring lock scaffold. Once the design has been completed by the team and signed off by the client. Slab and girder bridges are used when the economical span limit of solid slab bridges is exceeded. Possible dimensions are stated below or can be found in the product range. For simply supported spans, this limit is generally found to be nearly 10 metres and for continuous or balanced cantilever type structures, this limit is 20 to. Once the design has been completed by the team and signed off by the client the 3d model is sent electronically into the host computer of the factory. It is a semiprecast floor system consisting of a precast. The girder slab system design guide and technology is available for use by industry professionals. Dss ring lock lattice girders are manufactured under the guidance of our exhaustive qaqc program and iso accreditation. A lattice girder, like any girder, primarily resists bending.
The lattice girder was used prior to the development of larger rolled steel plates. Select the bottom face of the girder slab assembly to set the work plane. Autodesk structural precast extension for revit 2020. The lattice girder provides rigidity to the slab when insitu concrete is poured on site by a. Flat slabs with lattice girders according to european. The program is capable is designing ishaped sections with identical or different top and bottom flanges. The girder slab system and dbeam girder are available competitively from.
Apr 18, 2018 revit wall, floor and roof object style common edges, hidden lines and line weights cadclips duration. To insert independent lattice girders click structure tab work plane tab set. However, if cracking is allowed the crack width in the finished slab must be calculated. Peri international the footbridge was built in 1894 with a timber deck suspended between wrought iron lattice girders. The growing demand of girders draws a need for girder production machines. Design, manufacture and construction of buildings with. Filigree slabs the floor slab is made into a solid and monolithic reinforced concrete floor by using mixinsitu concrete that is poured at the construction site. Cross sections is a software that draws in cad the entire dimensioning of the deck cross sections of bridges, viaducts and other similar structures in 2d. Vt 20k the costeffective solid web girder gt 24 the versatile lattice girder with a high loadbearing capacity the peri vt 20k is the economical, 20 cm high solid web girder. The thickness of the finished floor slab is between. The girder slab composite steel and precast system breaks new ground for multistory residential building superstructures. This lecture presents the types and uses of trusses and lattice girders and indicates the members that are most often used in their construction. Available in the upcoming structural precast extension for revit 2019. Planning software for the production of filigreelattice girder slabs.
The reason is that lattice girders are a basic 3dreinforcement for concrete precast elements, like floors or walls. Eurocode 2 together with the german annex 1 gives advice for that. Girder slab technologies, llc is neither a subcontractor or material supplier. The following article describes the software modules for planning precast floor slabs in detail. In the same range of production planning, floordesk offers also a module for carrousel planning for the production of filigree lattice girder slabs. Hello there sepakistan, im designing a long span structure for roof, this just an alternative instead of using peb. It has been supplanted in modern construction with welded or bolted plate girders. Get answers fast from autodesk support staff and product experts in the forums. A lattice girder is a truss girder where the load is carried by a web of latticed metal. Design composite floors using lattice girder planks are designed in accordance with the relevant sections of eurocode 2. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. The manufacturing process provides a prefinished fine textured smooth concrete finish on the soffit of the omnia slab.
Trusses and lattice girders are important elements in building where they are used to support floors and roofs and provide bracing. While putting up lattice girder by means of textile slings the following rules have to be obeyed. World leading software for precast flooring flooroffice. The girderslab composite steel and precast system breaks new ground for multistory residential building superstructures.
177 204 23 458 525 1408 101 463 901 760 201 894 1536 722 646 246 1171 85 1164 1263 472 108 597 277 1016 1301 583 1563 116 447 1340 759 574 1271 91 125 1093 977 576 181 66 532 104 1234 211 1464 1261 1466 1085