First, find number of rods required for main reinforcement and distribution. Slab supported directly by columns are called flat slab. Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110. Oneway wide module joist slab in the lower middle is a variation on the oneway. As with the green book the scope of the manualcovers the majority of concrete building structures and has now been extended to cover slender columns and prestressed concrete. Drawing principles for layout and reinforcement drawings rozvojove projekty msmt cr rozvojove projekty mladych tymu 9 lines. Manual for design and detailing of reinforced concrete to the. Thus, the maximum reinforcement ratio corresponds to a net tensile strain in the. A civil engineer must know all the aspects regarding the flat floor system. Design is defined as the decisionmaking process of planning, sizing, detailing, and developing specifications preceding construction of slabsonground. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Step 3 cover to reinforcement determine cover required to reinforcement as per tables 11.
The rest of the floor can be slightly thinner with less dead weight. This manualfollows in the footsteps of influential guides published by the institution of structural engineers and uses the format of the green book manualfor bs 8110. Guide to the design and construction of reinforced concrete flat slabs contents membersof the projectsteeringgroup list of tables vii iv list of figures v 1. The thickness of the slab has to be increased or the slab has to be shear reinforced. Prepared for the pci hollow core slab producers committee john e.
The slab is without drops and is supported internally and on the external long sides by square columns. Determine the area of steel required in the slab at critical sections for column and middle strips. Punching of flat slabs design for shear at th e column heads 12. For flat plate slab system, the minimum slab thickness per aci 31814 are. Aps area of prestressed reinforcement avf area of shear friction reinforcement. The first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci. These materials are originally located at different websites. Analysis of flat sanalysis of flat sllabab moment division example 6000 6000 6000 6000 6000 5000 layout of building 7000 5000 a floor slab in a building where stability is provided by shear walls in one direction ns. Manual for the design of hollow core slabs second edition by donald r. Chapter 18 concrete slab structures january 2019 183 18. Flat slab is defined as one sided or twosided support system with sheer load of the slab being concentrated on the supporting columns and a square slab called drop panels. Find effective depth d, assuming reinforcement diameter. Reinforcement detail may be shown as was done in previous problem.
Flat slab types of flat slab design and its advantages flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. Foreword the reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. Draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. Reinforcement detailing of a slab is done based on its support conditions.
Flat slab system is an important division of concrete floor system. Manual for design and detailing of reinforced concrete to. Drafting principles for layout and reinforcement drawings. Oneway solid slabs are designed as rectangular sections subjected to shear and moment. Twoway joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf. This system is similar to the twoway flat plate system except there is a drop panel to provide extra thickness around the columns. Analysis of flat sanalysis of flat sllabab moment division example 6000 6000 6000 6000 6000 5000 layout of building 7000 5000 a floor slab in a building where stability is provided by shear walls. As span is same in both directions, provide similar reinforcement in both directions.
Different types of shear reinforcement used at column heads. Also it should be positioned at the outer sections of the lap as shown. Information on other aspects, su ch as materials, construction methods, placement of concrete, and finishing techniques, is. Ec2 webinar autumn 2017 lecture 93 minimum mandrel size. Fire tnoreport for the weena tower rotterdam enclosure d1. No shear reinforcement required detail the position of the linkstuds taking into account the calculated area of reinforcement, spacing rules, shape and position of the. Simply supported one way slab main reinforcement effective depth. Sep 03, 2011 draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1. Manual for the design of reinforced concrete building. Transverse reinforcement at laps bars in tension ec2. The position and dimensions of an opening shall be always provided or reference to appropriate detail drawing shall be present. Reinforcement detailing of reinforced concrete slabs. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23.
Guide to the design and construction of reinforced concrete. The behaviour and response of flat slab and post tensioned flat slab during earthquake is an important aspect which needs to be explored. It has to carry a live load of 4 knm2 and a finishing load of 1 knm2. For a bar adjacent to the face of the member, ab should be taken as. Although structures having concrete compressive strength exceeding 6000 psi are within the realm of this document, the recommendations limit. Flat slab design in tekla structural designer youtube. List of figures for hec 21design of bridge deck drainage back to table of contents figure 1. The first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci committee 340, design. Mar 23, 2015 as span is same in both directions, provide similar reinforcement in both directions. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place.
Flat slab analysis, design and detailing pdf civil. Department of mechanics, materials and structures english. Flat slab haunched slab a longitudinal slab is one of the least complex types of bridge superstructures. Saccoman, chairperson james beerbower ernest markle kevin boyle james markle jeffrey butler milo j. Pci manual for the design of hollow core slabs second edition by donald r. Slab may be supported on walls or beams or columns. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. The lateral loads are independently resisted by shear walls. Flat slab detail dwg detail for autocad designs cad.
Asw area of shear reinforcement in each perimeter around the col. Fdots structures manual 2004b, the price of the superstructure on a flat slab bridge is the least per square foot, when compared to other designs used in florida. Information on other aspects, su ch as materials, construction methods, placement of. Cross sections of twoway concrete floor at the slab edge. Aug 27, 2015 guide to the design and construction of reinforced concrete flat slabs contents membersof the projectsteeringgroup list of tables vii iv list of figures v 1. Twoway joist concrete slab floor waffle slab system. Select reinforcing bars for the slab and concentrate bars near the column, if necessary 5. Report bygdtu r074 2003 by gudmandhoyer technical university of denmark enclosure c2 a guidance to calculate the moment capacity in a bubbledeck joint.
This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Design beams if any, using procedures you learned in civl. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. Flat slab types of flat slab design and its advantages. Saccoman, chairperson james beerbower ernest markle. Flat slab bridges consist of prestressed, precast concrete deck panels that span from. Shear reinforcement to check if shear reinforcement and which system can be used, one can calculate the minimal needed value of factor k sys.
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