Narrower gap widths are also preferred to have compact layout and smaller size of roof slab. System selector guide girderslab technologies, llc. Weights of floor diaphragms are typically determined by taking onehalf of the walls above. A continuous load path must be provided to transfer lateral and vertical loads from the roof, walls, and floor system to the foundation. The floor system is the major part of a building structure. Residential commercial insulated suspended structural slab. Reinforced concrete joists are spaced at 24 610mm on center and poured monolithically with the slab to form a tbeam reinforced concrete structure. Double tees, hollowcore, and solid slabs are prestressed floor elements. Feng fu, in design and analysis of tall and complex structures, 2018. Flat slabs a flat slab is a twoway reinforced structural system that includes either drop panels or column capitals at columns. The floor system is the major part of a building structure, and the selection of an appropriate system is vital in achieving an overall economic building.
Posttensioned floor slabs are predominantly used in the multistory buildings, especially tall building construction across the world. A flat plate is a one or twoway system usually supported directly on columns or load bearing walls. Composite floor slabs generally comprise profiled steel floor deck with insitu concrete cast over the deck. The panform quaddeck panels are available in several. Modular precast concrete floor and roof slabs are machine manufactured under controlled conditions in modern precast. In order to adopt this composite precast reinforced.
The chart on the back is designed to guide you in the selection of a structural system according to its advantages in the multistory residential market. Electrical conduits and ducts may readily be embedded in the flat slab. This is because the slab sections can be about 30% thinner which enables the total weight carried by the foundations to be reduced. Floor systems and roof slab system by felerlaine rachel. The range of steel based floor systems is presented in general terms, with the advantages and. A flat plate floor system is a twoway concrete slab supported direct ly on columns with.
The flat plate is a twoway reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. Hollowcore is a prestressed concrete flat slab containing continuous. Building construction 2 roof and membrane failures are the most often litigated parts of a building. The load is transferred directly from slab to column in the flat slab. Woodframe floor systems and concrete slabongrade floors are discussed in this chapter. The buildings structural system consists of a system of trusses from which the various concrete. Although coldformed steel framing for floor systems also is permitted by the irc, it is not covered here. Spancast contec concrete floor we installed this sqft floor in under 4 hours. The combination of the joist and the slab performs as a t shaped beam. This guide specification serves as a guideline for slabs supported by pedestals for pedestrian roof plaza decks. Another advantage is a slight reduction in double tee weight that would improve.
By using the highly insulated epsdeck floor system, construction professionals can easily and cost effectively build a solid load bearing flat or low slope reinforced concrete roof structure with inherently high insulation values, ideal for finishing with a green roof system. Assume that the roof framing must be replaced because the new floor loads will be much greater than the existing roof loads. Roof pavers guide specifications for construction of hydrapressed slab roof pavers section 32 14. The decking formed by amdeck is a oneway reinforced concrete joist construction type a. The 1844 fox and barrett floor system, patented in the uk by fox, was the first to use concrete as a fireproof covering over. Light weight eps deck panels are supported by metal clad truss forms that provide the formwork for suspended slabs. Professional development series sponsor bentley systems, incorporated thin slab floor systems for high rise towers by steven m. Unilock architectural slabs and retaining walls come in a wide selection of shapes, textures and colors designed to deliver. Icf roof system applications for icf floor forming panels. When constructing the floor system it is important to take into consideration the type of flooring, the laying of pipes and reinforcement. Is it the concept of the roof, or the concept of the slab that takes precedence, or are the two concepts so intertwined that they must. Serviceability of a floor system can be maintained through deflection control and crack control deflection is a function of the stiffness of the slab as a measure of its thickness, a minimum thickness has to be provided irrespective of the flexural thickness requirement. The topshield ts has many narrow enclosures opened at the bottom due to component penetrations.
The continuous slab voids can be used as heatingcooling ducts and as chases. The concrete slab is reinforced with welded wire mesh and behaves structurally as a continuous oneway slab orientated perpendicularly to the joists. Guidelines for a twoway concrete flooring system brewer. Precast hollowcore provides a costeffective efficient floor and roof system. The concrete is compacted around cores that are formed with augers or tubes. A load path can be thought of as a chain running through the building. Each flooring system depends on the foundation you are working with or intend to build. Slab sections between 2 and 6 inches 50 and 150mm, depending on live loads and other forces applied to the slab, are commonly used. To learn more about precast structural systems and how they work, as well as. The radial duct system in its simplest f orm consists of. Since the cost of the floor system can be a major part of the structural cost of a building, selecting the most effective system for a. Alternative concrete floor slab system for residential buildings by c.
Floor systems when constructing the floor system it is important to take into consideration the type of flooring, the laying of pipes and reinforcement. This reduces the floortofloor height and overall cost of the building. Beauty, strength, and comfort make concrete floor and roof systems a solid choice for your home. A modified type of ceiling distribution system can be used if the registers. Guidelines for a oneway concrete flooring system brewer. Two floor systems will be investigated for potential use as the second floor in the keystone library castinplace concrete on metal deck composite slab design and precast hollow core concrete panels. Two floor systems will be investigated for potential use as the second floor in the keystone library. In order to create a second level for the keystone building, a new elevated floor system will replace the existing roof. The selection of an appropriate system is vital in achieving an overall economic building.
This paper presents an historical and analytical evaluation of the ribbed floor slab systems developed by. Lift slab construction is a method of constructing concrete buildings by casting the floor or roof. Design of the slab system is done for different spacing grid size of column to find out which grid size of the column or plan area which slab is economical. For technical classification purposes the determining factor has been first, the type of external wall construction and second, the roof and floor construction. Types of economical floor systems for reinforced concrete. With the increased use of concrete wall systems for homebuilding, more homeowners are demanding the strength, comfort, and beauty of concrete for the floors see decorative floors and roof of their new homes.
With over 300 floors sold within the first 6 months of. Know the pros and cons of each type of flooring before you begin. The annular gap widths of the enclosures have to be minimum to resist natural convection so that the heat load to roof slab cooling system is low. Typical construction details are available on the quadlock website. The maximum permitted cantilever of a second floor supporting a braced wall and roof is illustrated in figure 43. The hambro composite floor system consists of open web steel joist with a top chord embedded in a reinforced concrete slab.
This brief will provide guidance to architects and structural engineers during the concept phase of the design for selecting a suitable flooring system. All elements of a raised wood floor system must be properly sized and assembled to support the design loads. Ribbed floors consisting of equally spaced ribs are usually supported directly by columns. Comparative analysis and design of flat and grid slab. Structural frames, floor and roof systems, and loadbearing walls must be able to withstand the stresses and. Roof sheathing is the first structural component in the load path between the roof system and the foundation. Structural frames, floor and roof systems, and loadbearing walls must. This brief will provide guidance to architects and structural engineers during the concept phase of the design for selecting a suitable oneway flooring system. It is the system of construction in which the floor slab and the flat roof are cast one over the other at ground level at round columns or in situ cast. There are number of factors that influence the economy of floor systems such as building type, architectural layout, span length between columns and aesthetic features. Insulated suspended structural slab floor deck roof green roof superior strength, flexibility, safety and value.
It is one of the most common forms of construction of floors in buildings. Construction system, for definitive reasons, is the manner of constructing the whole or dominant part of the house 1. Floor and roof systems portland cement association. The type of flooring in a house must be adequately supported by the flooring structure below. All content pdf s, text, photographs, graphics, code, applications is protected by in the u. Fortruss is a forming system for insulated suspended concrete slabs.
This form of construction is not very common because of the formwork costs and the low fire rating. The analysis and design of slab system is done as per is 4562000 and is 19832002. Reinforced concrete slab is the most popular floor slab. They are either oneway spanning systems known as ribbed slab or a twoway ribbed system known as a waffle slab. Due to the fact that floor system cost constitute major part of structural cost, therefore selection of an economical floor system would affect the overall cost of the project. Keywords structure design and analysis of slab system, flat slab system, grid slab system, conventional. Example projects and details will be presented to highlight possible applications of. It maintains that the green roof also helps to buffer from the effects of sound as well as weather, and controlsdelays runoff from. There are many types of wooden flooring systems to choose from. In conventional slabbeam system, the load is transferred from slab to beam and ultimately beam to the column. Concrete floor and roof systems are the perfect match for. A hardwood floor can be a warm and inviting addition to your living spaces. Pdf reinforced concrete slab is the most popular floor slab system used in residential building construction in sri lanka. A flatplate system is well suited for roof parking or where other heavy loads are anticipated.
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