Bolted connections under hollow core slabs, steel beam. Installation hollowcore slabs are to be located and installed in accordance with expocrete drawing. Pretensioned hollow core slabs are one of the most widely applied precast elements in the modern building industry all over the world. Hollow core technical sheets should be used for guidance only and consultation with hollow core concrete should be made prior to proceeding. Hollowcore slab details drawing labels, details, and other text information extracted from the cad file translated from spanish. Hollow core slab technical sheets hollow core concrete. Modelling hollowcore concrete slabs subjected to fire. Hollow core slab properties prop imperial metric a 290. The hollow core slab has a variety of uses, including floors and roofs for buildings. Precast concrete floor support and diaphragm action core. 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. Bolted connections under hollowcore slabs, steel beam.
Sections and details showing connections, edge conditions, and support conditions of the hollow core planks. New applications of hollowcore components in housing, administrative, and public buildings by farnaz a. Builtin components such as electrical sockets, pipescables and openings etc. Load distribution factors for hollow core slabs with in. Minimum end bearing is 75mm unless specified otherwise on drawings. Pci manual for the design of hollow core slabs second edition by donald r. Beroukhim submitted to the department of architecture may 8, 1985. Hollowcore slabs have excellent span capabilities, achieving a capacity of 2. Hollow core slabs are prestressed, precast concrete slabs, with hollow portions in the regions of zero stresses. Reinforced concrete hollowcore slab is made with cores in one direction with the following points. Hollow core plank is a costeffective and versatile solution for almost any building project. Hollowcore slabs with castinplace concrete toppings. Panels with the heights of 150, 220, 265 mm designation bep are manufactured using extruding method, i.
The longspan capability is ideal for offices, retail or car park developments. Our prestressed hollowcore slabs, also called hollow core planks, concrete planks or voided slabs, are available in a variety of lengths and thicknesses. No matter what the type of design, encons hollowcore. Adobe acrobat reader is free and can be downloaded here. Hollowcore solutions slab section and material properties 203 x 1220 net area 8,685 mm2 moment of inertia 683. Additional reinforcement can be incorporated into hollowcore slabs to accept bolt. Concrete slab types construction, cost, and applications. Details hollowcoredetails hollowcore just click below to download a pdf or dwg detail. It was found during the development of the original model that, when modelling the floor slab with only one hollowcore unit, simulating the topping slab as. 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.
When they are placed, the tongue of one panel is placed inside the groove of adjacent. This comprehensive and easy to use resource has been divided up into the different project stages design approach, preplanning, preliminary design, final. Other topping materials such as gypcrete can be added to achieve a fire endurance using different tables. House framing n hollow core slabs video by construction diva. In order to view pdf documents, you must have adobe acrobat reader installed. Hollow core slab cylinder strength at transfer, fci 250 kgcm2 cylinder strength at 28 days, fc 400 kgcm2. The january 1994 issue of underwriters laboratories, inc. To obtain a higher slab thickness, normal carbonate concrete field topping can be added to gain a higher total slab thickness. Pdf strengthening of hollow core precast slabs using frp. Keep the dunnage accurately aligned from slab to slab. The slabs are typically 4 feet wide with standard thicknesses of 8 and 12.
Sizes and locations of these openings are to be provided to the manufacturer by the respective trades. Primarily used for floors and roof decks, hollow core is a precast slab of prestressed concrete designed for greater structural efficiency. Dxf files can be imported directly into many common cad programs. Other than weld plates, all structural connections are made without embedding anchors, dowels or other connection devices in the slab during manufacture.
The cpci metric design manual second edition indicates the following standards for the. Prepared for the pci hollow core slab producers committee john e. Details are available in both adobe acrobat reader pdf and cad dxf format. They are manufactured using high tensile strength prestressed strands. Hollow core slabs are prestressed concrete elements that have a constant cross section. Molin concrete offers two types of hollow core plank. Topping concrete cylinder strength at 28 days, fct 240 kgcm2.
Hollowcore slabs are precast prestressed concrete elements extensively used for floor, roof slabs and wall panels. The tongueandgroove panel could vary in size based on the design requirement. 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. Hollowcore slab dwg detail for autocad designs cad. Pci manual for the design of hollow core slabs and walls. This bundle contains all 32 pcirecommended hollowcore details. The doublet slabs vary in sizes and spans up to 15m have been used. Units are installed with or without a structural screed, depending on requirements. The topping may increase the flexural strength, shear strength, and bending stiffness of the slab if composite action is developed with the hollowcore units. 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. Hollowcore flooring technical manual 2003 hollowcore flooring is a technical manual covering the design and construction of projects utilising precast hollowcore flooring. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. Used as roof and intermediate floor formers in building the industrial, business and nonresidential facilities and residential buildings. To verify the approach adopted in this study, an elastic analysis using common finite element software sap 20001 for slab system consisted of seven grouted hollow core units is carried out under concentrated loading and line loading.
As betoneks manufactures six different types of hollow core slabs. More than 30 standard fire tests astm e119 have been conducted on hollow core floor assemblies. Hollowcore slabs are available in a range of seven depths. Hollow core slabs precast india infrastructures pvt. Due to the possibility of their use under various support or. Architectural details and treatments where applicable. The following sections and details demonstrate the simplicity of structural connections using the saycore system. Experimental research on wallhollow core slab connections. The schematic drawings of the two modelling methods are shown in figure 2. Task experimental research on wallhollow core slab connections 1 background when multistorey concrete buildings are made of bearing wall elements and prestressed hollow core slabs, the ends of the slab elements, together with the jointing concrete or mortar, transfer the loads from the upper wall element to the lower one. Also enclosed are sample specifications and a set of typical general notes. Plans locating and defining all hollow core planks furnished by the manufacturer with all castin openings shown and located.
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