Precast concrete is highly fireresistant and an excellent material for compartmentalization as it slows the. 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. Mar 22, 2007 gulf precast is a leading manufacturer of precast components in the united arab emirates. Applications of active hollow core slabs and insulated. Precast concrete hollowcore slabs lafarge precast edmonton. After curing, the slabs are cut into smaller pieces as required on site.
Hollowcore slab benefits of using hollowcore floor slabs. Full operation of precast hollow core slab machine shuangli building materials equipment co. Concrete slabs, therefore, are further classified into oneway joist slab, flat slab, flat plate, waffle slab, hollow core slab, precast. Hollowcore slabs have excellent span capabilities, achieving a capacity of 2. Run the numbers and estimate your next project in oldcastle precast hollowcore plank. 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. Bolted connections under hollowcore slabs, steel beam. Molin concrete offers two types of hollow core plank. Floor slabs are suitable to bridge larger spans at lesser height of a structure. Chapter 9 guide specification for precast, prestressed hollow core slabs. Slabs arrive onsite with a smooth prefinished soffit.
Hollowcore gets its strength from pretensioned steel strands that are embedded in high strength concrete. The longspan capability is ideal for offices, retail or car park developments. 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. Once the slabs reach on site, they are erected in to their positions using our tower cranes. Creagh were delighted to be one of the main sponsors for supercupni 2018. Dxf files can be imported directly into many common cad programs. As the heroes of flooring, roofing, bridges, and mezzanine systems, there are 7 main advantages of precast hollowcore slabs. Setting hollowcore slabs on bearing walls forms the necessary fire separation and the perfect noise barrier. Hollowcore commercial applications county materials.
Hollow core slabs are economical, have good fire resistance and sound insulation properties, and are capable of spanning long distances with relatively shallow depths. Formulas for homogenisation of the floor properties. 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. Melbourne manufacturers and installers of hollow core precast concrete for building. The aci 1996 standard provides guidelines on pages 302. Strengthening of prestressed concrete hollowcore slab.
Units are installed with or without a structural screed, depending on requirements. Pdf damage assessment of hollow core reinforced and. This paper provides the engineer with a simple design method dealing with situations arise where insitu. Motivation there is an interest in using the buildings concrete slab as tes. A hollow core slab is a precast, prestressed concrete with continuous voids.
Spiroll hollowcore slabs, was used at botswanas first science and. Common depths of prestressed hollow core slabs range from 6 to 10 in. Less is more with hollowcore slabs concrete issues. 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. Figures in shaded areas require additional shear strength from the standard product.
Maximize space in any house plan with hollowcore roof and floor systems. The slab serves as a ceiling for the lower level and. The hollow core slab is manufactured in a standard 4 width and 8, 12, and 12. The end edge of slabs may be of geometric shape oblique or stepped sawing provided in the project. Stahltons hollowcore is 1,200mm wide and comes in 200, 300 and 400mm thickness. The excellent loadbearing capacity and structural efficiency allows you to build large areas with fewer partition walls. Failure modes and shear design of prestressed hollow core.
Hollow core slabs precast india infrastructures pvt. Check here if you wish to receive emails from spancrete. Hollowcore can be used either as a solid floor or spaced to provide an even more economical flooring solution. Ultimately, this means greater freedom in design and architecture during and after construction as well as savings in material costs. 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. We combine longterm expertise with experience to provide our customers with tailormade solutions and give them the competitive edge they need. This uniqueness manifests itself in a suite of benefits in structural quality, cost savings, safety, and more. 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.
Adobe acrobat reader is free and can be downloaded here. These slabs are casted 120m long at a time, with a fixed width of 1. Continuous voids in the planks reduce their overall weight and help keep building costs in check. 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. Please provide your email address to learn more about how one builder maximized the benefits offered by precast. 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. However, the slabs can be manufactured to suit the specifications of your construction project. Pdf precast reinforced or prestressed concrete hollowcore slabs are often used in civil engineering structures of various purposes. The values for the sound transmission class were determined by tests which were with iso recommendation r 140 e, and the values were computed in accordance with astm in accordance with astm e90.
It is to be used as a basis for the development of an. For floor slabs a span to depth ratio limit of 45 is suggested. Manufacturing of concrete hollow core wall panels for. Hollow core concrete concrete acoustic noise barriers. Prepared for the pci hollow core slab producers committee john e. Hollowcore slabs vary by depth, length and loading performance with the standard width of a slab being 1200mm. Hollowcore slab precast slab depth mm structural topping depth mm total depth mm self weight knsq. Load distribution factors for hollow core slabs with insitu. Bolted connections under hollow core slabs, steel beam. Anchor for prestressed hollow concrete slabs hollow core anchor easy steel, zinc plated range of loading. 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. 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. Plans locating and defining all hollowcore planks furnished by the manufacturer, with all major openings shown. As a first step the development of the world market for precast and precast machinery was checked to get an.
Pci, an organization dedicated to fostering greater understanding and use of precast and prestressed concrete. Create extra living and storage space by using a homes entire footprint, even neglected space available under a garage, porch or stoop. Read the safe operating procedure on the use of timber infills applicable for the spaced hollowcore option. 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. Vme hollow core slabs have all the advantages of precast concrete. Can you guys help me finding text about good design phase for hollow core slabs. The design basis is generally in accordance with bs 59503. Our solid composite floors combine solid prestressed units with a composite. They are then either stocked in our huge stockyard or taken to the site directly. Hollowcore slabs with castinplace concrete toppings. Plans locating and defining all hollow core planks furnished by the manufacturer, with all major openings shown.
Welcome to the precastprestressed concrete institute central region with membership throughout indiana, kentucky, ohio and western pennsylvania, tennessee and west virginia. Gulf precast hollow core slab production in united arab. Thanks for your interest in building with precast in the residential space. Impact insulation class iic of various floor systems utilizing spancrete hollowcore slabs. 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. Details are available in both adobe acrobat reader pdf and cad dxf format. The units themselves are manufactured at a width of 1200mm and depths of 150, 200, 250, and 300mm. Precast hollowcore concrete planks installation at. Design of composite beams using precast concrete slabs. Hollow core plank is a costeffective and versatile solution for almost any building project.
In order to view pdf documents, you must have adobe acrobat reader installed. Hollow core slab properties prop imperial metric a 290. When, 1 fire endurance, 2 openings, or 3 sustained live loads do not control the design. One of our trademarks is the inhouse manufacturing of precast hollowcore slabs. The depth of each slab usually ranges from 110 mm to 400 mm with spans typically available up to 200 meters. Fib recommendations precast prestressed hollow core floors. Hollow core technical sheets should be used for guidance only and consultation with hollow core concrete should be made prior to proceeding. Hollowcore residential applications county materials. Hollow core slabs hcs were developed in the 1950s when longline prestressing techniques evolved. A new prestressed hollow core slab factory opens in. 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. Hollowcore slabs are prestressed floor elements with voids. We asked structural engineering professional lasse rajala, business unit director at sweco, to explain the secret behind its success.
However i am not finding any good detailed design guides to do thisnot much about hollow core slabs in the ec. Cost saving carparks hollow core concretes 17m span plank is ideally suited to carpark design. The figures shown in the load table are based on the capacity of the slab governed by flexural strength. 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. Using this unique slab will not only reduce building costs but will also reduce the overall weight of a structure. 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. This comprehensive and easy to use resource has been divided up into the different project stages design approach, preplanning, preliminary design, final. Zeroslump, highstrength concrete with a 28day strength in excess of 8,000 psi and. Pci manual for the design of hollow core slabs and walls. 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. Manual for the design of hollow core slabs second edition by donald r. Hollow core slab stock photos download 405 royalty free photos. 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. Connections in concrete wall gaskets, concrete wall.
The elimination of beams and columns reduced on site labour costs utilising. Upc information turn over qar 110 million 2017 70 staff, 350 450 workers. Fire ratings will also be improved if the plank assembly is restrained against thermal expansion. Hollowcore flooring technical manual 2003 hollowcore flooring is a technical manual covering the design and construction of projects utilising precast hollowcore flooring. Download specifications about spancrete hollowcore for use in the preparation of specifications for a particular project. 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. Our precast hollowcore composite combines hollowcore slab with a composite. Hollow core anchor easy mkt metallkunststofftechnik. 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. Section 03 41 00 precast structural concrete 030000 concrete section 034100 precast structural concrete 0341 precast concrete hollow core planks part 1 general 1. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. Download 405 hollow core slab stock photos for free or amazingly low rates. I am designing hollow core slabs with and without toppings according to the eurocodes.
To be the leader in prestressed concrete slabs and much more worldwide. Hollowcore planks can be attached to cmu walls, steel beams or precast wallsbeams. The slab has been especially popular in countries where the emphasis of home construction has been on precast concrete, including. Van thuyne invests in a new hollow core factory echo precast. Savings in cost and time will keep your project on time and under budget.
Primarily used for floors and roof decks, hollow core is a precast slab of prestressed concrete designed for greater structural efficiency. Hollow core slabs are prestressed, precast concrete slabs, with hollow portions in the regions of zero stresses. Ipha annual conference september 2003 mm none 1200 mm 2400mm 3600mm 200 7600 7400 6300 5200 strength of element. If the length of the cutout is more than 50 cm, it is necessary to use lateral enforcement a1 and longitudinal a2. 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. 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. Should a suspended slab be required inside an existing building, the entrance. A structural topping can increase that up to a 4hour rating. Span of slabs varied from 5m upto 18m placed simply supported over beams. 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. The companys product range includes precast structural concrete components, prestressed elements, hollow core slabs, glass fiberreinforced plastics.
Builtin components such as electrical sockets, pipescables and openings etc. 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. 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. Feasibility of construction with hollowcore concrete slabs. Fib recommendations precast prestressed hollow core floors quality design aspects for a good quality of the ceiling. 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.
As more residential covenants dictate restrictions, hollowcore helps home owners gain more usable space. Some hol low core producers are able to combine the ribbed. Preparation for topping typically, composite topping slabs are placed over the grouted hollow. 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.
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