The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including northern europe and former socialist countries of. Design principles for hollowcore slabs regarding shear and transverse load bearing capacity, splitting and quality control available only as downloadable pdf file. Mnl126 manual for the design of hollow core slabs free pdf. The concrete distribution system has been supplied by marcantonini and consists of a 2 m. These slabs are supported by cables, embedded in the webs of the slabs, under tension, hence the name prestressed concrete. Details are available in both adobe acrobat reader pdf and cad dxf format. In order to view pdf documents, you must have adobe acrobat reader installed. Hollowcore slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths.
Hollow core slabs are prestressed concrete elements that have a constant cross section. The voids in each slab usually have a diameter that is equal to approximately 23 to 34 of the slab section, while the thickness of each plank is dependent on the ultimate length requirement. The concrete hollow core slabs have between four and six longitudinal cores running through them, the primary purpose of the cores being to decrease the weight, and material within the floor, yet maintain maximal strength. Hollow core slabs provide economical and efficient floor and roof system for various reasons.
It is to be used as a basis for the development of an. Oct 11, 2016 hi chan kok tiong, structural bridge design is intended to be used for the structural analysis and design of bridges to bs5400, eurocode 2, aashto and as5100, but the methods are generally very similar to those for buildings so with a little bit of engineering judgment it may be possible to use the software to carry out the calculations for hollow core slabs used in building construction. Precast concrete hollow core floor slabs hollow core slabs are precast, prestressed concrete elements that are generally used for flooring. The floor elements are provided with round hollow channels in the longitudinal direction resulting in weight savings. At this stage, design loads are used to calculate the depth and wire patterns of the slabs, depending on the spans required. They are manufactured using high tensile strength prestressed strands or single wire which are embedded.
Melbourne manufacturers and installers of hollow core precast concrete for building. Installation hollow core slabs are to be located and installed in accordance with expocrete drawing. Hollow core advantages and applications banu mukhtar. The batching plant was made by speco which is a korean company. Hollow core slabs are sometimes also termed as voided slabs or concrete planks.
Hollowcore can be used in virtually any building application that calls for strength, durability and speed of construction and is a crucial part of the structural integrity in multifamily residential, manufacturing and recreational facilities, retail, schools, municipal and commercial buildings. Applications of active hollow core slabs and insulated. Prepared for the pci hollow core slab producers committee john e. The slabs are typically 4 feet wide with standard thicknesses of 8 and 12.
Effectiveness of a ventilated concrete slab on an air source heat pump performance in cold climate. Hollowcore slab benefits of using hollowcore floor slabs. As a first step the development of the world market for precast and precast machinery was checked to get an. Hollow core slab stock photos download 405 royalty free photos.
The hollow core slab from vme precast, is of very high quality due to its excellent concrete compressive strength coupled with high tensile strength of steel strand. The slabs originally had an internal prestressing steel reinforcement ratio of 0. Hollow core slab vme precast precast concrete slab. A readymade template with a hollow core beam may be used for the design checks in scia lite as follows. Therefore, we meet the requirement for a 3 hour cover thickness. Hollow core covering slabs are characterized with possibility to be used in the situations with increased spans andor loading, guaranteeing signi. Hollow core slabs and wall elements without prestressed steel wire can be formed by extruders. File new from the templates, choose the suitable template template dialogue appears edit the input values as required press ok. This is then translated into a production plan for. Common depths of prestressed hollowcore slabs range from 6 to 10 in. Hollowcore production at hanwha factory in bismayah, iraq. Our prestressed hollowcore slabs, also called hollow core planks, concrete planks or voided slabs, are available in a variety of lengths and thicknesses. Keep the dunnage accurately aligned from slab to slab.
Production international prestressed hollowcore association. Adobe acrobat reader is free and can be downloaded here. Shear capacity of hollow core slabs on flexible supports. The voids of the hollow core can be used as conduit for installations. Floors are prestressed and suitable for use as cantilever flooring in home and commercial construction. Hollowcore slabs are prestressed floor elements with voids. Hollow core 14 356 mm load tables 12 strands m r kip ft simple span centre to centre of span feet 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47. Strengthening of prestressed concrete hollowcore slab.
The success of this precast product is owing to the combination of. Composite steel beams with precast hollow core slabs. Ultimately, this means greater freedom in design and architecture during and after construction as well as savings in material costs. Thermal performance of a hollow core concrete floor system for passive. However, the slabs can be manufactured to suit the specifications of your construction project. A hollow core slab is a precast, prestressed concrete with continuous voids. Builtin components such as electrical sockets, pipescables and openings etc. Teemage hollowcore slabs are precast in the controlled environment of the factory away from the building site.
Hollow core slabs weight up to 50% less than conventional cast insitu slab of the same size resulting considerable saving in construction cost. The depth of each slab usually ranges from 110 mm to 400 mm with spans typically available up to 200 meters. A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank. Pci manual for the design of hollow core slabs and walls, 3rd edition free pdf download mnl12615 this manual presents in detail design of hollow core slabs for. The floor layout of hollowcore slabs in a building is designed using 3d cad software. Therefore, we meet the requirement for a 3 hour slab thickness, but the strand clear cover needs to be met too. By using the wet cast method of manufacture as opposed to extruding concrete, the core is formed using polystyrene void formers and the ends are solid concrete. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. Connections in concrete wall gaskets, concrete wall. It also demonstrates the long spans achievable with hollow core slabs, perfect for an open plan office area.
Using this unique slab will not only reduce building costs but will also reduce the overall weight of a structure. Hbl has stateoftheart technology to offer precasted prestressed hollow core slabs with advanced extrusion technique. The use of precast concrete hollowcore flooring is a highly cost effective solution that fits easily into any structural system such as steel or concrete frame or indeed masonry construction. Installation hollowcore slabs are to be located and installed in accordance with expocrete drawing.
Pdf this paper provides a procedure for finite element analysis of hollowcore slab floors, which may be necessary in case of large floor openings find, read and cite all the research you. A complete revision of the diaphragm chapter includes the latest design information. Economical and efficient flooring and roofing system. The hollow core slabs require only simple processing with no constructive propping involved. Hollowcore slabs lajes alveolares machinery and equipment for hollow core slabs maquinas e. Minimum end bearing is 75mm unless specified otherwise on drawings. We core drill hollow core precast slabs when needed. Depending on the requirements of the project, our design team will provide the most adequate and economical design that will suit the span and loading performance and comply with. The hollow core slab is manufactured in a standard 4 width and 8, 12, and 12. Zeroslump, highstrength concrete with a 28day strength in excess of 8,000 psi and. Troubleshooting precast cracks in hollowcore slabs. As an added benefit, the hollow core slabs will eliminate the need to drill the slab for electrical and mechanical runs. Fire ratings will also be improved if the plank assembly is restrained against thermal expansion.
The slab serves as a ceiling for the lower level and. Hollow core slabs are typically used in construction of floors or roof in a multistory building. The size of these elements will typically range in width from 600 to 2400 mm, in thickness from 150 to 500 mm, and can be delivered in lengths of up to 24 m. The primary purpose of these cores is to decrease by 40% to 50% the weight of the slabs, which leads to significant savings in the rest of the members of the building construction. Units are installed with or without a structural screed, depending on requirements. Hollowcore slabs conform to the current edition of csa and cpci related standards. Download 405 hollow core slab stock photos for free or amazingly low rates.
Pci manual for the design of hollow core slabs second edition by donald r. A total of five prestressed hollowcore slabs were tested to failure. The longspan capability is ideal for offices, retail or car park developments. Mar 01, 2016 nicore plank hollowcore slabs this guide specification is intended for the use of professional personnel competent to evaluate the significance and limitations of its contents, and who will accept responsibility for the application of the material it contains. Pdf the objective of this study is to understand the behaviour of hollow core slabs strengthened with frp and hybrid techniques through. Stabilan slabs are suitable for long span applications like townhouses, clusters, industrial and commercial.
Hollowcore slabs with castinplace concrete toppings. Pdf design analysis of prestressed hollow core slabs on. Pcimanual for the design of hollow core slabs second edition bydonald r. Saccoman, chairpersonjames beerbower ernest marklekevin boyle james marklejeffrey butler milo j.
Hollowcore slabs are available in a range of seven depths. Hollowcore slabs are precast prestressed concrete elements extensively used for floor, roof slabs and wall panels. Hollow core slab after laying the slab on the construction site, there is no need to carry out any further concreting works, you can immediately begin with screeding work. Dxf files can be imported directly into many common cad programs. A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multistory apartment buildings. Setting hollow core slabs on bearing walls forms the necessary fire separation and the perfect noise barrier. These slabs are of lesser weight and are used for quick erection and early completion of projects. Bearing on structural steel beams, two levels of slabs were installed simultaneously. Hollowcore is manufactured using long line extruders which form continuous cores running through the slabs. Common depths of prestressed hollow core slabs range from 6 to 10 in. Hollowcore slabs vary by depth, length and loading performance with the standard width of a slab being 1200mm. Pci manual for the design of hollow core slabs and walls, 3rd edition free pdf download mnl12615 this manual presents in detail design of hollow core slabs for gravity and lateral loads.
Hollowcore floor slabs our hollowcore slabs continue to help accelerate and mitigate risks on projects. This office building is a prime example of how using hollow core slabs can accelerate the building process. The designers have greater flexibility because of the varying thickness 150 400 mm available and larger spans up to 18 meters can be obtained at costs which are lower than conventional flooring systems. The excellent loadbearing capacity and structural efficiency allows you to build large areas with fewer partition walls. Hollowcore slabs have excellent span capabilities, achieving a capacity of 2. They are manufactured using high tensile strength prestressed strands. Vme hollow core slabs have all the advantages of precast concrete. Restrain every hollowcore bay that requires a 3 hour rating. Bolted connections under hollowcore slabs, steel beam.
The hollow core slab has a variety of uses, including floors and roofs for. Prestress, hollow core slab, flexible support, shear resistance, floor test, composite construction, concrete. The units themselves are manufactured at a width of 1200mm and depths of 150, 200, 250, and 300mm. If the area in which you are planning to construct a building is in a lowseismic zones and you want to have a precast concrete construction to ensure fast handingover. Hollow core concrete concrete acoustic noise barriers. We are known for the very high standard of our slabs that are manufactured at our factory in polokwane using spiroll extrusion technology from the united kingdom. Hollow core slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths.
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