Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. The main reinforcing in a single barrel reinforced concrete box culvert slab is the bottom transverse reinforcing steel. This is a dynamic block which enables you to easily add reinforcement to flat slabs and rafts. Concrete slabs come in a variety of forms depending on their locations.
Reinforced concrete design rc design specifications, loads, and design methods strength of rectangular section in bending shear and diagonal tension design of stairs, double rc beam, and tbeam analysis and design for torsion design of slabs. Slab may be supported on walls or beams or columns. Reinforcements for slabsonground crack width controlas per aci. As we think that calculating steel quantity for the slab is a too difficult task, it required good skills in civil engineering. Atr crosssectional area of the transverse reinforcement along the development length lsy.
Anchorage and lap splicing detailing of slabs, columns. Concrete reinforcement steelfibreonly reinforced concrete in free suspended elevated slabs as outlined in concrete society technical report 63 1, over the last 15 years the total replacement of all traditional reinforcement by steel fibres has become completely routine in applications such as industrial and commercial suspended slabs on piles. If playback doesnt begin shortly, try restarting your device. Reinforcement conventional reinforcing steel typically used in base slabs and flat slab tops. Limit state design of reinforced concrete by varghese p. Autocad structural detailing helps improve design accuracy by providing tools that automate the generation of more complete and comprehensive. Design example on slab bridge fundamentals of bridge structures.
While this publication deals only with foundations reinforced with reinforcing bars andor welded wire reinforce. It is based on the theory that the slab panel will. Minimum recommended depth for slabs with main reinforcement parallel to traffic is where s is the span, scc of supports. Purpose of this course is to establish a firm understanding of behavior of reinforced concrete. When a rectangular slab is supported on all the sides and the lengthtobreadth ratio is less than two, it is considered to be a twoway slab. Reo wire gauge for measuring reomesh wire diameters. Information on other aspects, such as materials, construction methods, placement of concrete, and finishing techniques, is included only where it is. The rib reinforcement follows the same rules with the beam reinforcement. Twoway concrete slabs with openings the static system and the design of reinforcement. Sep 10, 2017 bar bending schedule plays a vital role in finding the quantities of reinforcement in structure. Reinforcement for slabson ground for crack width control only there are two factors based on which the crack width can be controlled by reinforcement.
In ordinary jointed floors, steel fibers provide a safety net by limiting the width of any cracks that occur, by accident, between the joints. Prestressed reinforcement in external tendons is also considered reinforcement. This report covers the design of slabs on grade for loads caused by material stored directly on the slab or on. Design of reinforced concrete, 9th edition wec civilians. The critical section of the slab is just outside the outside edge of the beam supporting the slab. Two separate mats of reinforcing steel are independently supported in this slab for the rcb.
Slab is one of the most famous part of a construction project. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Concrete reinforcement steelfibreonly reinforced concrete. Pdf reinforced concrete is widely used in building industry. Advisory board committee on residential slabs onground.
For rc slabs reinforced with plain bars, the proposed numerical method by drar et al. Slabs can be prefabricated and brought to the construction sites or can be made insitu at the site 1,2. The slab may be plain, reinforced, or prestressed concrete. This procedure can be made reasonably simple, if not easy. This document provides standards of practice for both the architectengineer ae and reinforcing steel detailer in showing reinforcing steel details. Concrete slabs are commonly divided into the following types.
Besides being a medic, he loves blogging, and he always strives hard to share the highquality content with others. Download two way slab design excel sheet template for free. Reinforcement detailing of reinforced concrete slabs. Openings in the slab are becoming common nowadays in retrofitting of existing structures or even in new structuresbuildings during the design stage due to. 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. Aci 315 99 details detailing of concrete reinforcement. Reinforced flat slab design excel sheet best online. Steel reinforcement for concrete slab reinforcement bar. How to calculate steel quantity for slab civiconcepts.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Step 3 cover to reinforcement determine cover required to reinforcement as per tables 11. Effect of macrofibers on behavior and performance of concrete slabs and overlays. Plain slabs similar in shape to ground slabs take the load directly from the floor and transmit it to the beams.
The main reinforcing in a bridge slab supported by beams is both the top and the bottom transverse reinforcing steel. The reinforcing bars must extend into the slab beyond the critical section for a required length. At the point when the depth of web or rib in a beam crosses 750 mm, the side face reinforcement of cross sectional area at the very least 0. Reinforced concrete detailing to eurocode 2 ec2 section 8 detailing of reinforcement general rules bar spacing, minimum bend diameter anchorage of reinforcement lapping of bars large bars, bundled bars ec2 section 9 detailing of members and particular rules beams solid slabs flat slabs columns walls deep beams foundations discontinuity. Feb 07, 2014 a short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. A rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Although not included in astm c478, plants may use astm a706 reinforcing steel when welding reinforcing mats. The slabs possessing ratio of longer length to its smaller length lylx higher than 2 is known as one way slab or else as two way slab. Pdf reinforced concrete design or reinforced cement.
Ribbed slabs oneway joists introducing voids to the soffit of a slab reduces dead weight and increases the efficiency of the concrete section. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Reinforced concrete design 1 design of slab examples and. Determine v max v eff u od where u o is the length of column perimeter check v ma slab. Slab supported directly by columns are called flat slab. There are many different methods for analysis of twoway reinforced concrete slabs. Slab reinforcement and beam reinforcement details daily civil. Therefore, this study can be extended to examine the effect of frp strengthening on these slabs. Slabs are usually used in floor and roof construction.
A 2 2area 2 a c 2 2 posttensioned concrete design table 11 list of symbols used in the aci 31808 code cp area enclosed by the outside perimeter of the section, in a g gross area of concrete, in. The wire reinforcing institute recommends the use of the subgrade drag theory for slabs up to 150 feet in length. Design of reinforced concrete 10th edition pdf free download. Fiber reinforced concrete overview for concrete pavement. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Rc slab design ec2 worked example bending reinforcement. Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1. Oneway and twoway slabs university of asia pacific. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. The slab has to carry a distributed permanent action of 1. In one way slab, major reinforcement is along the side of smaller direction and the reinforcement along the side of longer direction is known as distribution steel. 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.
Access click design required reinforcement of slab walls options code parameters to open the plate and shell reinforcement type dialog, and then click. Prefabricated reinforcing cages pfx prefabricated reinforcing cages for concrete elements such as slabs, walls, cores, columns, piles and beams. The lateral loads are independently resisted by shear walls. Reinforced cement concrete rcc or reinforced concrete or reinforced concrete design standard books pdf free download. No beam, free layout and large windows create bright and open spaces in flat. The reinforcement tab allows you to define reinforcement parameters. Steel fiber reinforcement for ground supported slabs cfs 1002 fibers steel fibers can help control random cracks in groundsupported concrete floors. The reinforcement will be inspected before concreting.
Designs done by this method should be economical yet give quite satisfactory results with a minimum of deflection and resulting superstructure distress. Find effective depth d, assuming reinforcement diameter. Design considerations design methodology analysis of flat slab detailing. Steel reinforcement strong in tension, and strong in compression as long as the concrete can stop it bowing myth busting. They may be supported on two opposite sides only fig. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Buildinghow products books volume a the reinforcement. Flat slab analysis, design and detailing pdf civil engineering.
Aci 360, design of slabs ongrade, refers to this as a type b slab. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Twoway joist concrete slab floor waffle slab system. Slab reinforcement stock photos download 2,249 royalty free. Code requirements for residential concrete and commentary an aci standard reported by aci committee 332 aci 33208 the code portion of this document covers the design and construction of castinplace concrete one and twofamily dwellings and multiple singlefamily dwellings townhouses, and their accessory structures. In this context, design is defined as the decisionmaking process of planning, sizing, detailing, and developing specifications generally preceding construction. Lots of concretors will tell you we put steel the reinforcement close to the bottom of a driveway slab because when you load a slab, the bottom is in tension,which needs the steel, and the top compresses. In order to find out the bar bending schedule for slab or steel reinforcement in slab, i recommend you to learn basics of bar bending schedule and how to adopt concrete cover for different components of a building. It will be ensured that the surface of reinforcement will be free from mud, oil, retarders, grease or any other substance which would affect adversely the steel or concrete chemically or reduce the bond. Beamless slabs beamless slabs are supported only on columns and are applied mostly in large industrial and. Between the ribs, the slab is usually reinforced with a common wire mesh. Method statement for formwork, reinforcement and concrete. For b oth one way and two way slab with an example. The powerpoint files are posted rather than files in pdf format to permit the.
Couplers onesteel reinforcing can provide the best coupler option to reduce lapping for columns and beams. Slab reinforcement dynamic block autocad autodesk app store. Reinforcement detailing of a slab is done based on its support conditions. Return instructions and a free of charge return mailing label are available at. More economical structures resulting from the use of prestressing steels with a very high tensile strength instead of normal reinforcing steels. A slightly deeper section is required but these stiffer floors facilitate longer spans and provision of holes.
Oneway and twoway slabs oneway slabs transfer the imposed. One way slab design procedure with example design of one. In flatplate floors, slab column connections are subjected to high shear stresses produced by the transfer of axial loads and bending moments between slab and columns. This book aims to provide fundamental understanding to the analysis and design of reinforced concrete structures according to aci. The code has included definitions of beam, slab, column and wall in accordance. Varghese also provides details about the new additions in the code for stirrups in be. Pdf slabs are the flooring systems of most structures including office, commercial and residential buildings, bridges. Slab reinforcement and beam reinforcement details daily. Reinforced concrete design 1 design of slab examples. Reinforced concrete rc slabs are used as floors in residential buildings, industrial buildings, decks in bridges, and many more. Reo calculator for steel reinforcement area calculations. Design of reinforced concrete 10th edition pdf free. Flat slab analysis, design and detailing pdf civil. The materials to be used are grade c25 concrete and grade 500 reinforcement.
The designer determines the required slab thickness after determining the controlling loads, the appropriate safety fact o r, and the subgrade modulus appropriate for the base and fill materials. Manual for design and detailing of reinforced concrete to the code. Reinforced concrete may also be permanently stressed in tension, so as to improve the behaviour of the final structure under working loads. Jun 14, 2017 download two way slab design excel sheet template.
Manual for design and detailing of reinforced concrete to. Reinforced concrete sloped roof slab overhang detail section detail of a reinforced concrete sloped inclined slab overhang cantilever detail, supported from a concrete beam. Fatigue analysis of frp strengthened rc slabs reinforced. Reinforcement detailing of reinforced cement concrete slabs.
Download design of reinforced concrete textbook by civilenggforall in pdf format useful for the students preparing for gate, ies, semester exams. Ec2 webinar autumn 2016 lecture 52 designing for shear in slabs when shear reinforcement is not required e. Slab design reading assignment chapter 9 of text and, chapter of aci31802. Sep 03, 2011 draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. However, mainly as far as the stirrups are concerned, the amount of placed rebars is not as large as it is in beams. 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. Cantilever longitudinal and transverse reinforcement bars, supporting beam reinforcement details, adjucent slab top bottom reinforcement. Reinforcement parameters reinforcement tab rc slab. For better view, please read this post in landscape mode if you are on the mobile device. In this article, you will learn about how to calculate steel quantity for the slab. A second video shows how the shear resistance of the slab and its deflection are checked.
Oneway, and twoway bond and achorage design of column, and footing. Download 2,249 slab reinforcement stock photos for free or amazingly low rates. These are the joint spacing and the thickness of the slab. Also it will be ensured that it is placed in full accordance to the issued for.