However, the slabs can be manufactured to suit the specifications of your construction project. Effectiveness of a ventilated concrete slab on an air source heat pump performance in cold climate. Details are available in both adobe acrobat reader pdf and cad dxf format. 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. Hollow core slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths. Our prestressed hollowcore slabs, also called hollow core planks, concrete planks or voided slabs, are available in a variety of lengths and thicknesses. Hollowcore slabs with castinplace concrete toppings. Pci m anual for the design of h ollo w c ore s labs and w. Because of hollowcores high loadbearing capacity, it can handle unique design loads from tile and stone floors, fireplaces, wall partitions, columns and even oversize vehicles. Hollowcore slab benefits of using hollowcore floor slabs.
In order to view pdf documents, you must have adobe acrobat reader installed. This comprehensive and easy to use resource has been divided up into the different project stages design approach, preplanning, preliminary design, final. Run the numbers and estimate your next project in oldcastle precast hollowcore plank. Zeroslump, highstrength concrete with a 28day strength in excess of 8,000 psi and. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. They are the ideal choice for constructing floors in individual homes, both at ground level and upper level. 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.
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. Less is more with hollow core slabs the good old hollow core slab has managed to remain one of the most common floor and roof slabs over the years. Hollowcore flooring technical manual 2003 hollowcore flooring is a technical manual covering the design and construction of projects utilising precast hollowcore flooring. Less is more with hollowcore slabs concrete issues. The topping may increase the flexural strength, shear strength, and bending stiffness of the slab if composite action is developed with the hollowcore units. Savings in cost and time will keep your project on time and under budget.
Floor slabs are suitable to bridge larger spans at lesser height of a structure. Hollow core slabs are prestressed concrete elements that have a constant cross section. Precast concrete is highly fireresistant and an excellent material for compartmentalization as it slows the. Hollowcore residential applications county materials. The excellent loadbearing capacity and structural efficiency allows you to build large areas with fewer partition walls. Units are installed with or without a structural screed, depending on requirements. Ultimately, this means greater freedom in design and architecture during and after construction as well as savings in material costs. Hbl has stateoftheart technology to offer precasted prestressed hollow core slabs with advanced extrusion technique. Hollowcore commercial applications county materials. The units themselves are manufactured at a width of 1200mm and depths of 150, 200, 250, and 300mm. We asked structural engineering professional lasse rajala, business unit director at sweco.
The notable fire resistance tests on precast, prestressed concrete hollow core slab were performed by abrams, 6 borgogno et al. 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. Construction load tables colony precast concrete llc. 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. Pdf hollowcore slab systems information manual first. Hollow core floors are used due to their lower cost and quick erection time. Performing design checks over simplified model saves considerable time without compromising at the quality of output. Betonika uab, a leading company in the sector of precast concrete element manufacturing, produces floor slabs to individual projects, therefore the architects are provided with greater freedom when designing internal spaces of buildings and preparing layouts of the rooms.
Dxf files can be imported directly into many common cad programs. Hollowcore is easy to work with and accomodates other building trades. Hollow core slabs are prestressed, precast concrete slabs, with hollow portions in the regions of zero stresses. The longspan capability is ideal for offices, retail or car park developments. A structural topping can increase that up to a 4hour rating.
The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including. As more residential covenants dictate restrictions, hollowcore helps home owners gain more usable space. 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. Prepared for the pci hollow core slab producers committee john e. Pcimanual for the design of hollow core slabs second edition bydonald r. Jul 28, 2014 hollow core slabs provide considerable benefits to builders and house owners. Pci manual for the design of hollow core slabs and walls. Pdf analysis of hollowcore slab floors researchgate. Hollowcore slabs vary by depth, length and loading performance with the standard width of a slab being 1200mm.
Saccoman, chairpersonjames beerbower ernest marklekevin boyle james marklejeffrey butler milo j. Hollow core covering slabs are characterized with possibility to be used in the situations with increased spans andor loading, guaranteeing signi. Jun 06, 2014 hollow core slabs are prestressed concrete elements that have a constant cross section. The hollow core slab is manufactured in a standard 4 width and 8, 12, and 12. Hollowcore flooring systems have been designed for quick installation, to significantly increase build efficiency, and to provide high levels of construction strength and quality. The topping may increase the flexural strength, shear strength, and bending stiffness of the slab if composite action is developed with the hollow core units. Hollowcore solutions slab section and material properties 203 x 1220 net area 8,685 mm2 moment of inertia 683.
Disclaimer the views expressed in this publication are not. It also creates wide open spaces without the need for columns, trusses or joists. Thermal performance of a hollow core concrete floor system for passive. Failure modes and shear design of prestressed hollow core. Mnl126 manual for the design of hollow core slabs free pdf. Pci manual for the design of hollow core slabs second edition by donald r. Hollow core slab is a complex geometric entity that takes long time for design checks. Hollow core slab properties prop imperial metric a 290. Hollowcore is the product of choice in structures that require sound barriers between floors, excellent fire and earthquake resistance, heat insulation characteristics, long spans, and is therefore widely used in hotels, schools, multistorey car parks, high rise buildings and upscale residential and commercial complexes. Maximize space in any house plan with hollowcore roof and floor systems. Hollowcore slab systems information manual first edition 2008 quality, strength, speed.
The lightweight nature of the product allows erection by tower crane, decreasing site congestion. Less is more with hollowcore slabs the good old hollowcore slab has managed to remain one of the most common floor and roof slabs over the years. Therefore, we meet the requirement for a 3 hour slab thickness, but the strand clear cover needs to be met too. Prestress, hollow core slab, flexible support, shear resistance, floor test, composite construction, concrete. Hollow core slabs provide considerable benefits to builders and house owners. Slabs arrive onsite with a smooth prefinished soffit. Hollow core slabs hcs were developed in the 1950s when longline prestressing techniques evolved. The notable fire resistance tests on precast, prestressed concrete hollowcore slab were performed by abrams, 6 borgogno et al.
They are manufactured using high tensile strength prestressed strands. Performing design checks over simplified model saves considerable time. Hcs are advanced products in the prestressed precast concrete industry, especially in terms of efficient use of material low selfweight, and given their high quality due to the efficient production line manufacturing process. Hollow core slab properties prop imperial metric a 235. Create extra living and storage space by using a homes entire footprint, even neglected space available under a garage, porch or stoop. We asked structural engineering professional lasse rajala, business unit director at sweco, to explain the secret behind its success. These slabs are of lesser weight and are used for quick erection and early completion of projects. Adobe acrobat reader is free and can be downloaded here. The depth of each slab usually ranges from 110 mm to 400 mm with spans typically available up to 200 meters. Designed to meet each customers build specification, hollowcore flooring systems are fixed onsite quickly and economically.
Simplified crosssection is a geometrically equivalent crosssection to normal crosssection. A complete revision of the diaphragm chapter includes the latest design information. Applications of active hollow core slabs and insulated. Common depths of prestressed hollow core slabs range from 6 to 10 in. Hollow core slabs precast india infrastructures pvt. Specialized beams of precast prestressed concrete or steel create shallow floor systems supported on precast columns. Hollowcore slabs are prestressed floor elements with voids. Builtin components such as electrical sockets, pipescables and openings etc. Hollowcore slabs lajes alveolares machinery and equipment for hollow core slabs maquinas e. They are manufactured using high tensile strength prestressed strands or single wire which are embedded. Hollow core concrete slab is a versatile precast element. The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including northern europe and former.
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