The comparison between the experimental and numerical investigations gave insight into the fire performance of hplwc hollow core slabs and enlightened on the phenomena governing their fire resistance. Hollow core slab properties prop imperial metric a 290. Vme hollow core slabs have all the advantages of precast concrete. 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. As a first step the development of the world market for precast and precast machinery was checked to get an. The use of hollow core or solid plank precast units offer benefits in terms of cost the long spanning capabilities of the precast slabs lead to fewer secondary beams as well as the advantages offered by composite construction. Thanks for your interest in building with precast in the residential space. In accordance with our cpci certification all concrete used is tested prior to pouring to ensure it meets the project criteria, similarly prior to stripping and shipping the cylinders taken during pre pour testing process are tested to ensure they meet the appropriate level of strength. Applications of active hollow core slabs and insulated. Plans locating and defining all hollowcore planks furnished by the manufacturer, with all major openings shown. The aci 1996 standard provides guidelines on pages 302. The longspan capability is ideal for offices, retail or car park developments. I am designing hollow core slabs with and without toppings according to the eurocodes. Hollowcore flooring technical manual 2003 hollowcore flooring is a technical manual covering the design and construction of projects utilising precast hollowcore flooring.
Concrete slabs, therefore, are further classified into oneway joist slab, flat slab, flat plate, waffle slab, hollow core slab, precast. Hollowcore slabs are prestressed floor elements with voids. Since concrete slab is common in the basement or garage of north american houses, designing and utilizing a ventilated concrete slab vcs with proper control strategy is viable and does not increase the construction costs 14. Creagh were delighted to be one of the main sponsors for supercupni 2018. The companys product range includes precast structural concrete components, prestressed elements, hollow core slabs, glass fiberreinforced plastics. Fib recommendations precast prestressed hollow core floors quality design aspects for a good quality of the ceiling. Continuous voids in the planks reduce their overall weight and help keep building costs in check.
This paper provides the engineer with a simple design method dealing with situations arise where insitu. Gulf precast hollow core slab production in united arab. Hollow core slabs hcs were developed in the 1950s when longline prestressing techniques evolved. Run the numbers and estimate your next project in oldcastle precast hollowcore plank. As an added benefit, the hollow core slabs will eliminate the need to drill the slab for electrical and mechanical runs. Moreover, prestressing decreases the deflection at midspan of the tested hollow core slab and reducesthe oscillation period due to the increase. Mar 03, 2016 the common method of constructing hollow core slab is by using high strength, zero slump concrete which is reinforced by using high tensilestrength, prestressing wire strands of 9 mm diameter.
The hollow core slab is manufactured in a standard 4 width and 8, 12, and 12. Cost saving carparks hollow core concretes 17m span plank is ideally suited to carpark design. 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. Precast concrete hollowcore slabs lafarge precast edmonton. Connections in concrete wall gaskets, concrete wall. Primarily used for floors and roof decks, hollow core is a precast slab of prestressed concrete designed for greater structural efficiency. When, 1 fire endurance, 2 openings, or 3 sustained live loads do not control the design.
Pdf precast reinforced or prestressed concrete hollowcore slabs are often used in civil engineering structures of various purposes. Hollowcore planks can be attached to cmu walls, steel beams or precast wallsbeams. The depth of each slab usually ranges from 110 mm to 400 mm with spans typically available up to 200 meters. Figures in shaded areas require additional shear strength from the standard product. The study here addressed this issue by conducting experimental study of four different hollow core concrete slabs along with a solid concrete slab as a control specimen. After curing, the slabs are cut into smaller pieces as required on site. Mar 22, 2007 gulf precast is a leading manufacturer of precast components in the united arab emirates.
Read the safe operating procedure on the use of timber infills applicable for the spaced hollowcore option. Hollow core slab stock photos download 405 royalty free photos. Using this unique slab will not only reduce building costs but will also reduce the overall weight of a structure. Stahltons hollowcore is 1,200mm wide and comes in 200, 300 and 400mm thickness. Some hol low core producers are able to combine the ribbed. Our precast hollowcore composite combines hollowcore slab with a composite. Less is more with hollowcore slabs concrete issues. Load distribution factors for hollow core slabs with insitu. The end edge of slabs may be of geometric shape oblique or stepped sawing provided in the project. Creagh support the habitat for humanity big build programme by sending a team of employees to various locations throughout the world to help build houses. A hollow core slab is a precast, prestressed concrete with continuous voids. Full operation of precast hollow core slab machine shuangli building materials equipment co. Details are available in both adobe acrobat reader pdf and cad dxf format.
The figures shown in the load table are based on the capacity of the slab governed by flexural strength. Create extra living and storage space by using a homes entire footprint, even neglected space available under a garage, porch or stoop. Slabs arrive onsite with a smooth prefinished soffit. They are then either stocked in our huge stockyard or taken to the site directly. Mar 01, 2016 guide specification for nicore plank hollow core 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. The units themselves are manufactured at a width of 1200mm and depths of 150, 200, 250, and 300mm. Hollowcore can be used either as a solid floor or spaced to provide an even more economical flooring solution. Our solid composite floors combine solid prestressed units with a composite. Hollowcore slabs have excellent span capabilities, achieving a capacity of 2. Dxf files can be imported directly into many common cad programs. Prepared for the pci hollow core slab producers committee john e. Formulas for homogenisation of the floor properties.
Ipha annual conference september 2003 mm none 1200 mm 2400mm 3600mm 200 7600 7400 6300 5200 strength of element. Upc information turn over qar 110 million 2017 70 staff, 350 450 workers. Download specifications about spancrete hollowcore for use in the preparation of specifications for a particular project. Hollowcore commercial applications county materials.
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. Hollow core floor slabs are designed and manufactured using a continuous formation method in accordance with the floor plan with indicated holes submitted by the client. Pci manual for the design of hollow core slabs and walls. Floor slabs are suitable to bridge larger spans at lesser height of a structure. 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. Manufacturing of concrete hollow core wall panels for. Precast hollowcore concrete planks installation at. 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. Strengthening of prestressed concrete hollowcore slab. Design of composite beams using precast concrete slabs.
Preparation for topping typically, composite topping slabs are placed over the grouted hollow. Download 405 hollow core slab stock photos for free or amazingly low rates. Guide specification for nicore plank hollow core 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. Bolted connections under hollow core slabs, steel beam. Fib recommendations precast prestressed hollow core floors. The design basis is generally in accordance with bs 59503. The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including. Hollowcore residential applications county materials. Motivation there is an interest in using the buildings concrete slab as tes. Hollow core technical sheets should be used for guidance only and consultation with hollow core concrete should be made prior to proceeding. Please provide your email address to learn more about how one builder maximized the benefits offered by precast.
Feasibility of construction with hollowcore concrete slabs. However, the slabs can be manufactured to suit the specifications of your construction project. Plans locating and defining all hollow core planks furnished by the manufacturer, with all major openings shown. The elimination of beams and columns reduced on site labour costs utilising. Can you guys help me finding text about good design phase for hollow core slabs. This uniqueness manifests itself in a suite of benefits in structural quality, cost savings, safety, and more. Fire ratings will also be improved if the plank assembly is restrained against thermal expansion. Setting hollowcore slabs on bearing walls forms the necessary fire separation and the perfect noise barrier. Once the slabs reach on site, they are erected in to their positions using our tower cranes. Hollowcore slab precast slab depth mm structural topping depth mm total depth mm self weight knsq. 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.
Span of slabs varied from 5m upto 18m placed simply supported over beams. Hollow core slabs are prestressed, precast concrete slabs, with hollow portions in the regions of zero stresses. A structural topping can increase that up to a 4hour rating. To be the leader in prestressed concrete slabs and much more worldwide.
Van thuyne invests in a new hollow core factory echo precast. These slabs are casted 120m long at a time, with a fixed width of 1. Savings in cost and time will keep your project on time and under budget. Pci, an organization dedicated to fostering greater understanding and use of precast and prestressed concrete.
Section 03 41 00 precast structural concrete 030000 concrete section 034100 precast structural concrete 0341 precast concrete hollow core planks part 1 general 1. Check here if you wish to receive emails from spancrete. Hoogenboom delft university of technology, faculty of civil engineering and geosciences, delft, the netherlands this paper provides a procedure for finite element analysis of hollow core slab floors, which may be necessary in case of large floor openings. Precast concrete is highly fireresistant and an excellent material for compartmentalization as it slows the. Hollowcore slabs vary by depth, length and loading performance with the standard width of a slab being 1200mm. However i am not finding any good detailed design guides to do thisnot much about hollow core slabs in the ec. If the length of the cutout is more than 50 cm, it is necessary to use lateral enforcement a1 and longitudinal a2. Hollow core anchor easy mkt metallkunststofftechnik. Melbourne manufacturers and installers of hollow core precast concrete for building. This comprehensive and easy to use resource has been divided up into the different project stages design approach, preplanning, preliminary design, final. In order to view pdf documents, you must have adobe acrobat reader installed. Manufacturing of concrete hollow core wall panels for making partition walls with worlds latest concrete extrusion technology or light load bearing hollow core slabs with additional reinforcement for affordable housing. We combine longterm expertise with experience to provide our customers with tailormade solutions and give them the competitive edge they need.
Hollow core slab properties prop imperial metric a 235. 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. Chapter 9 guide specification for precast, prestressed hollow core slabs. Hollow core slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths. Zeroslump, highstrength concrete with a 28day strength in excess of 8,000 psi and. It is to be used as a basis for the development of an. Hollow core slab vme precast precast concrete slab. Should a suspended slab be required inside an existing building, the entrance.
Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. The slab serves as a ceiling for the lower level and. For roof slabs a span to depth ratio limit of 50 is suggested. Hollowcore slab benefits of using hollowcore floor slabs. Pdf failure state of reinforced and prestressed concrete hollow. A new production facilitiy for prestressed concrete floor slabs have been manufactured on xtec machines here since march 2006. 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. Molin concrete offers two types of hollow core plank.
One of our trademarks is the inhouse manufacturing of precast hollowcore slabs. Load distribution factors for hollow core slabs with insitu reinforced concrete joints jongyoung song,1 kim s, elliott,2 ho lee,3 and hyogyoung kwak4 received march 16, 2009, revised may 6, 2009, accepted may 7, 2009 abstracts. Hollowcore slabs with castinplace concrete toppings. Hollowcore gets its strength from pretensioned steel strands that are embedded in high strength concrete. The excellent loadbearing capacity and structural efficiency allows you to build large areas with fewer partition walls. As the heroes of flooring, roofing, bridges, and mezzanine systems, there are 7 main advantages of precast hollowcore slabs. 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.
Impact insulation class iic of various floor systems utilizing spancrete hollowcore slabs. Common depths of prestressed hollow core slabs range from 6 to 10 in. Anchor for prestressed hollow concrete slabs hollow core anchor easy steel, zinc plated range of loading. Units are installed with or without a structural screed, depending on requirements. We asked structural engineering professional lasse rajala, business unit director at sweco, to explain the secret behind its success. Maximize space in any house plan with hollowcore roof and floor systems.
Concrete slab types construction, cost, and applications. As more residential covenants dictate restrictions, hollowcore helps home owners gain more usable space. Hollow core plank is a costeffective and versatile solution for almost any building project. Manual for the design of hollow core slabs second edition by donald r. Failure modes and shear design of prestressed hollow core.
Varying conditions and stipulations ask for the selection of appropriate and costeffective concrete slab, keeping in view, the type of building, architectural layout, aesthetic features, and the span length. Pdf damage assessment of hollow core reinforced and. Adobe acrobat reader is free and can be downloaded here. Spiroll hollowcore slabs, was used at botswanas first science and. The second is a hollow core pretensioned slab analysis using pci to check the stresses limits, design strength and m crack the third excel is an analysis method for seismic design of reinforced concrete water containing structures. Bolted connections under hollowcore slabs, steel beam.
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