Download 405 hollow core slab stock photos for free or amazingly low rates. 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. The success of this precast product is owing to the combination of. Teemage hollowcore slabs are precast in the controlled environment of the factory away from the building site. Pdf the objective of this study is to understand the behaviour of hollow core slabs strengthened with frp and hybrid techniques through. Using this unique slab will not only reduce building costs but will also reduce the overall weight of a structure. Hollow core concrete concrete acoustic noise barriers. Details are available in both adobe acrobat reader pdf and cad dxf format. Zeroslump, highstrength concrete with a 28day strength in excess of 8,000 psi and. 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. A readymade template with a hollow core beam may be used for the design checks in scia lite as follows.
Hollowcore slabs lajes alveolares machinery and equipment for hollow core slabs maquinas e. 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. Hollow core slabs weight up to 50% less than conventional cast insitu slab of the same size resulting considerable saving in construction cost. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. This office building is a prime example of how using hollow core slabs can accelerate the building process. Hollowcore production at hanwha factory in bismayah, iraq. Bolted connections under hollowcore slabs, steel beam.
Keep the dunnage accurately aligned from slab to slab. Restrain every hollowcore bay that requires a 3 hour rating. Pci manual for the design of hollow core slabs second edition by donald r. 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. Fire ratings will also be improved if the plank assembly is restrained against thermal expansion. The hollow core slab has a variety of uses, including floors and roofs for. Setting hollow core slabs on bearing walls forms the necessary fire separation and the perfect noise barrier. 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. It also demonstrates the long spans achievable with hollow core slabs, perfect for an open plan office area. The slab serves as a ceiling for the lower level and. Pcimanual for the design of hollow core slabs second edition bydonald r. Ultimately, this means greater freedom in design and architecture during and after construction as well as savings in material costs.
We core drill hollow core precast slabs when needed. 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. Hollowcore slabs are available in a range of seven depths. File new from the templates, choose the suitable template template dialogue appears edit the input values as required press ok. 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.
Hollowcore slabs are precast prestressed concrete elements extensively used for floor, roof slabs and wall panels. 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. Troubleshooting precast cracks in hollowcore slabs. Hollowcore slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths. Exeed precast offers a range of depth for hollow core slabs. The batching plant was made by speco which is a korean company.
The floor layout of hollowcore slabs in a building is designed using 3d cad software. Hollowcore floor slabs our hollowcore slabs continue to help accelerate and mitigate risks on projects. Saccoman, chairpersonjames beerbower ernest marklekevin boyle james marklejeffrey butler milo j. Effectiveness of a ventilated concrete slab on an air source heat pump performance in cold climate. Connections in concrete wall gaskets, concrete wall. The slabs are typically 4 feet wide with standard thicknesses of 8 and 12. Common depths of prestressed hollow core slabs range from 6 to 10 in. In order to view pdf documents, you must have adobe acrobat reader installed. Hollowcore is manufactured using long line extruders which form continuous cores running through the slabs. The floor elements are provided with round hollow channels in the longitudinal direction resulting in weight savings. 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.
Pdf design analysis of prestressed hollow core slabs on. Hollowcore slabs vary by depth, length and loading performance with the standard width of a slab being 1200mm. Hollow core advantages and applications banu mukhtar. It is to be used as a basis for the development of an. Hollowcore slabs are prestressed floor elements with voids. Hollow core slab vme precast precast concrete slab.
Units are installed with or without a structural screed, depending on requirements. Slabs arrive onsite with a smooth prefinished soffit. Hollow core slab stock photos download 405 royalty free photos. Melbourne manufacturers and installers of hollow core precast concrete for building. These slabs are of lesser weight and are used for quick erection and early completion of projects. Thermal performance of a hollow core concrete floor system for passive. They are manufactured using high tensile strength prestressed strands. 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.
The concrete distribution system has been supplied by marcantonini and consists of a 2 m. Prepared for the pci hollow core slab producers committee john e. The voids of the hollow core can be used as conduit for installations. Strengthening of prestressed concrete hollowcore slab. A hollow core slab is a precast, prestressed concrete with continuous voids. Installation hollowcore slabs are to be located and installed in accordance with expocrete drawing. Hollow core plank technical guide temperatures are based on the amount of concrete cover and the standard fire exposure as defined by the timetemperature relationship specified in astm e119. Hollow core slabs provide economical and efficient floor and roof system for various reasons. Hollow core slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths. 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. Adobe acrobat reader is free and can be downloaded here. 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. 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.
This is then translated into a production plan for. As a first step the development of the world market for precast and precast machinery was checked to get an. A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank. Production international prestressed hollowcore association. The hollow core slab is manufactured in a standard 4 width and 8, 12, and 12. Economical and efficient flooring and roofing system. 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. However, the slabs can be manufactured to suit the specifications of your construction project. Hollowcore slabs conform to the current edition of csa and cpci related standards. 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. Hbl has stateoftheart technology to offer precasted prestressed hollow core slabs with advanced extrusion technique. Installation hollow core slabs are to be located and installed in accordance with expocrete drawing. Our prestressed hollowcore slabs, also called hollow core planks, concrete planks or voided slabs, are available in a variety of lengths and thicknesses. A total of five prestressed hollowcore slabs were tested to failure.
These slabs are supported by cables, embedded in the webs of the slabs, under tension, hence the name prestressed concrete. Shear capacity of hollow core slabs on flexible supports. 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. Hollowcore slabs with castinplace concrete toppings. Therefore, we meet the requirement for a 3 hour slab thickness, but the strand clear cover needs to be met too. 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. Stabilan slabs are suitable for long span applications like townhouses, clusters, industrial and commercial. The units themselves are manufactured at a width of 1200mm and depths of 150, 200, 250, and 300mm. Hollowcore slabs have excellent span capabilities, achieving a capacity of 2. The longspan capability is ideal for offices, retail or car park developments. At this stage, design loads are used to calculate the depth and wire patterns of the slabs, depending on the spans required. Pdf analytical and numerical studies on hollow core slabs. 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. Therefore, we meet the requirement for a 3 hour cover thickness.
They are manufactured using high tensile strength prestressed strands or single wire which are embedded. The hollow core slabs require only simple processing with no constructive propping involved. Hollow core slabs are prestressed concrete elements that have a constant cross section. Bearing on structural steel beams, two levels of slabs were installed simultaneously. 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.
Builtin components such as electrical sockets, pipescables and openings etc. 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. Dxf files can be imported directly into many common cad programs. Precast concrete hollow core floor slabs hollow core slabs are precast, prestressed concrete elements that are generally used for flooring. Minimum end bearing is 75mm unless specified otherwise on drawings. The slabs originally had an internal prestressing steel reinforcement ratio of 0. Also, since several hollow core extruded slab systems are made with zero slump concrete, there is an additional reason to examine their characteristics. Floors are prestressed and suitable for use as cantilever flooring in home and commercial construction. Common depths of prestressed hollowcore slabs range from 6 to 10 in.
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. Hollowcore slab benefits of using hollowcore floor slabs. As an added benefit, the hollow core slabs will eliminate the need to drill the slab for electrical and mechanical runs. Applications of active hollow core slabs and insulated. Prestress, hollow core slab, flexible support, shear resistance, floor test, composite construction, concrete. The depth of each slab usually ranges from 110 mm to 400 mm with spans typically available up to 200 meters. Troubleshooting precast cracks in hollowcore slabs download the pdf version of this article. Hollow core slabs are typically used in construction of floors or roof in a multistory building.
Hollow core slabs and wall elements without prestressed steel wire can be formed by extruders. Composite steel beams with precast hollow core slabs. 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. Hollow core slabs are sometimes also termed as voided slabs or concrete planks. Vme hollow core slabs have all the advantages of precast concrete. The excellent loadbearing capacity and structural efficiency allows you to build large areas with fewer partition walls.
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