While hollowcore doors are sometimes maligned, they do have their place in the home for being vastly cheaper than either solid wood or solid core doors. 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. New stahlton fibrecore in recent years, through research and perceptions amongst designers, much has been learnt and developed by our designers to improve the shear performance of stahlton hollowcore products. To obtain a higher slab thickness, normal carbonate concrete field topping can be added to gain a higher total slab thickness. To check the validity of the method, 49 shear tests on hollow core slabs with thickness 200. Transform any room in your house simply by changing the door. 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. Pci manual for the design of hollow core slabs and walls. Prepared for the pci hollow core slab producers committee john e. In all tests the observed failure mode was the same as the predicted one, i. Keep the dunnage accurately aligned from slab to slab. Chapter 2 of the pci design handbook3 provides information on dimensions, section properties, and loadcarrying capacities of hollowcore slabs. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. The equivalent thickness of the 200 mm 8 hollow core slab is 125 mm therefore exceeding the 124 mm minimum.
Hollowcore flooring is a precast prestressed concrete slab with tubular voids which run through the full length of the slab, thereby reducing the weight of the unit. Quality assurance of hollow core slab floors pdf fip reports 1992. Hollow core slabs are prestressed concrete elements that have a constant cross section. They are the ideal choice for constructing floors in individual homes, both at ground level and upper level. The contractor hereby warrants that the precast accordance with.
Maximize space in any house plan with hollowcore roof and floor systems. Hollow core concrete slab is a versatile precast element. The two producers that fabricated the hollowcore units use different fabrication machines and therefore employ different concrete mixtures in their processes. One producer uses an extruder with a drymix concrete, and the other uses a slip. Hollow core floors are used due to their lower cost and quick erection time. Jeldwen rockport white 5panel equal hollow core molded composite slab door common. The lightweight nature of the product allows erection by tower crane, decreasing site congestion. Resistance of prestressed hollow core slabs against web.
Hollow core spans 50 feet plus continuous installation minimizing down time on site for other trades proper coordination and quick installation allows for a fastpaced. Hollow core concrete slabs have many advantages over the conventional solid concrete slabs. Proof of concept tests for hollowcore floor unit connections. Double tees for floor and roof allowable superimposed service loads, pounds per square foot noncomposite span ft 50 52 54 56. The units themselves are manufactured at a width of 1200mm and depths of 150, 200, 250, and 300mm. Jeldwen molded composite interior doors with smooth surfaces offer a modern, clean look. Our prestressed hollowcore slabs, also called hollow core planks, concrete planks or voided slabs, are available in a variety of lengths and thicknesses. 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. The eurocode 2 method overestimated the mean shear resistance of all tested slab types. Hollow core slabs precast india infrastructures pvt. Hollowcore slabs with castinplace concrete toppings. Four tests on prestressed hollow core slab units were carried out.
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. Formulas for homogenisation of the floor properties. Review load tables, details and specs of spancrete precast hollowcore for use in specifications for an upcoming project. If you need to install doors throughout your entire home, you can save a great deal of money by using hollowcore doors for bedrooms, bathrooms, pantries, and closets. Jeldwen rockport white 5panel equal hollow core molded. Mnl126 manual for the design of hollow core slabs free pdf. Create extra living and storage space by using a homes entire footprint, even neglected space available under a garage, porch or stoop. In todays world of innovation and fasttracking, the hollowcore floor slab is a viable and in many instances, preferable alternative to more conventional building methods. Hollowcore slab150mm, b hollowcore slab100mm, and c hollowcore slab75mm at. These specifications cover manufacture, transportation, and erection of precastprestressed hollow core plank, as manufactured by nitterhouse concrete products, inc. Specialized beams of precast prestressed concrete or steel create shallow floor systems supported on precast columns. Full operation of precast hollow core slab machine shuangli building materials equipment co. This comprehensive and easy to use resource has been divided up into the different project stages design approach, preplanning, preliminary design, final.
Hollowcore flooring technical manual 2003 hollowcore flooring is a technical manual covering the design and construction of projects utilising precast hollowcore flooring. It is the best solution for the current market demands related to the modern housing needs. Reprinted from pci manual for the design of hollowcore slabs. Pci m anual for the design of h ollo w c ore s labs and w. Details hollowcoredetails hollowcore just click below to download a pdf or dwg detail. A complete revision of the diaphragm chapter includes the latest design information. Ultraspan is a machineextruded, precast, prestressed hollowcore plank. Manual for the design of hollow core slabs second edition by donald r. Figure 6 shows the cracks in the web of a longitudinally cutted hollow core slab during a fire test at the laboratory of tno in delft, the nether lands 6. Minimum end bearing is 75mm unless specified otherwise on drawings. The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including northern europe and former. Hollow core slab properties prop imperial metric a 235.
Hollow core slabs provide considerable benefits to builders and house owners. 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. Details are available in both adobe acrobat reader pdf and cad dxf format. Melbourne manufacturers and installers of hollow core precast concrete for building. The plank is manufactured on 500foot long beds in a standard width of 48 inches and. 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. The slab serves as a ceiling for the lower level and. Any core drilled openings that cut through the strand must be accounted for in the design of the plank and carefully monitored in the field. Hbl has stateoftheart technology to offer precasted prestressed hollow core slabs with advanced extrusion technique. The reason for the distribution of the cracks over the whole length lies in the fact that the. In the tests the slab units were subjected to pure torsion.
Hollowcore slab benefits of using hollowcore floor slabs. Hollowcore slabs lajes alveolares machinery and equipment for hollow core slabs maquinas e. That role has been strengthened through the acquisition of topfloor by the echo group, south africas largest and longestestablished prestressed and precast. Setting hollowcore slabs on bearing walls forms the necessary fire separation and the perfect noise barrier. Hollow core concrete concrete acoustic noise barriers. Compared to the other alternate and traditional methods of construction, precast hollow core slabs are manufactured using highly automated hollow core machines. For 200 mm slabs and slabs with flat webs the overestimation was tens of percent. Dxf files can be imported directly into many common cad programs. They are manufactured using high tensile strength prestressed strands. The flexural behavior of this type of slabs have not been investigated in detail in the past. Hollowcore was originally conceived and developed as south africas alternative to insitu cast concrete floor panels for multistorey buildings some 25 years ago. Stahlton now offers galvanised steel fibres cast in our hollowcore units to prevent web shear cracking in highly prestressed units.
Since its establishment in 1988, hollow core concrete pty. Numerical analysis of reinforced concrete hollowcore slabs. Installation hollowcore slabs are to be located and installed in accordance with expocrete drawing. Other topping materials such as gypcrete can be added to achieve a fire endurance using different tables. As industry leaders, hollow core has served an array of prestigious clients and has assisted them in. Feasibility of construction with hollowcore concrete. Hollowcore residential applications county materials. Issn 01103326 proof of concept tests for hollowcore floor unit connections by professor des bull and jeff matthews this report has been prepared for precast nz inc. Discover a homes hidden potential for additional space with hollowcore.
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