Analysis and design of slabs two way civil engineers pk. This is a part of his project economic design of two way rcc slabs under prof s. Two way slab design by direct design method as per aci 31811. Foreword this spreadsheet performs an analysis and design of two way spanning reinforced concrete slab.
Oct 23, 2019 two way slab design spreadsheet this spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. Comprehensive and customizable reports are available for all analysis and design results. Reinforced concrete slab and beam design software adaptrc 2017. Best is subjective, so i will give my opinion here. Bs8110 provides a guide for undertaking analysis of simple slabs spanning in two directions, subject to universally distributed loads udl. Betonexpress, software for designing structural elements of reinforced concrete. He developed a project economic design of two way rcc slabs and this slab designing excel is a part of his project. Finite element design without strips is also available and useful for slabs with complex geometries. Find depth of slab using deflection control criteria. I have developed a microssoft excel software for design of a two way rcc slab. If the ratio of longer dimension of the slab panel to the shorter dimension is greater than or equal to 2 then it is designed as one way slab.
Twoway joist waffle slab design approach and methodology. Two way slabs have two way bending unlike one way slab. Design of 2 way slab using etabs tutorial direct design. One way slab bends in one direction and two way slab bends on both the directions. Apr 24, 2019 in this video you can see how to design of a two way reinforced concrete slab with rcsolver software program according to eurocode 2 specifications. One way and two way slab design as per aci, is, bs code with. Its for a residential slab in the us on a pier and grade beam fo two way slab design concrete engineering general discussion engtips.
Concrete grade 30 mpa, yield strength of reinforcement 500 mpa, variable action on floor 2. The stiffness of 2way slabs is not considered in this calculation, so the user should manually assign the proper k factor for columns supporting 2way slabs. It has numerous abilities including the 3d presentation of. 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. Dec 03, 2019 two way slab is a slab supported by beams on all the four sides and the loads are carried by the supports along both directions, it is known as two way slab. Design the floor to satisfy ultimate and serviceability limit state requirements. Twoway slabs have two way bending unlike oneway slab. Buildinghow team integrates all earthquake resistant building technologies. This spreadsheet undertakes these calculations and returns design moments for use during detailed design. Two way slab design panel select boundary condition of slab for upliftment of corners. Home structural engineering slab design two way slab design by direct design method as per aci 31811.
Steps for slab designing by direct design method ddm 2way slab on beams interior panel, exterior panel, corner panel design defining grids for slab design define material properties for slab. The building has been named the aqua because of its contoured, wavelike balconies. I wanted to see if anyone has any good literature on two way slab design for point loads. Design example the layout of a floor slab is shown in figure 1 below. May 02, 2017 am from tn lylx 1 as two way slab in our theoretical studies but in site they are using oneway slab reinforcement design cause of due to economic cost wise low and labour cost is low to compared with two way slab design so, in site all are mostly provided one way slab. Get an efficient two way reinforced slab design with rcsolver. Betonexpress design of concrete structures according to eurocode 2. There are some basic differences between one way slabs and two way slabs. I know that there is aashto for deck design using one axle or point loads, but these point loads a are smaller. Analysis of two way ribbed and waffle slabs with hidden beams. Take spand 28 for simply supported slab and 32 for continuous slab.
Reinforced concrete slab and beam design software adaptrc. Details title one way and two way slab design as per aci, is, bs code with excel duration 30 mins language english format mp4 size 190 mb download method. The steel fixers formwork drawing of a twoway slab for reasons regarding behaviour, safety and economical design, the twoway slab is far more efficient than the equivalent oneway slab. A civil engineer must know all the aspects regarding the flat floor system. Two way slab design spreadsheet spreadsheet, slab, concrete. One way slabs are the easiest to design as the direction is simple and are usually designed as set of beam strips spanning in one direction. Dec, 2017 beam and slab arrangement can be the best example for one way and two way slabs.
One way and two way slab design as per aci, is, bs code. Suspended slabs can include flat, twoway, waffle, and ribbed framing systems. In waffle slab design where the drop panels create a large critical shear perimeter, the factor b o d has limited contribution and is traditionally neglected for simplicity and conservatism. Rcsolver is a present dayone of the best software program for the configuration of concrete members as indicated by eurocode details. Design of a two way rcc slab structural engineering forum. So, main reinforcement is provided in both direction for two way slabs. Specific code sections will be discussed in conjunction with construction photographs to highlight the design. Design of reinforced concrete structures ii two way slabs 1 1. For the simplicity in design, one way slabs are designed in per meter strips.
Models can have columns, braces, walls, and ramps connected from the floors. Tn342 design example 2way mondada 093090 adapt corporation. Concrete slab design software economically design posttensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. Design of a two way reinforced concrete slab with rcsolver software program according to eurocode 2 specifications. Two way slab design by direct design method as per aci 31811, step by step procedure and limitations of direct design method for two way slab is presented. Two way rcc slab designing tool in microsoft excel developed by shankar tayal a 3rd year student of school of infrastructure, indian institute of technology, bhubaneswar this is a part of his project economic design of two way rcc slabs. This situation happen when slab connected by monolithic with the supporter or slab panel connected by monolithic between one and another and moment acting at slab edge. This can be used in conjunction with a structural analysis program such as our slab. Reinforced concrete slab and beam design software adaptrc 2017 product overview an easytouse and learn software for the design, analysis, and investigation of reinforced nonprestressed concrete beams, beam frames, slabs and floor systems a must have production tool in every structural engineering office. Simply supported slab upliftment of corners continuous slab no upliftment. The program can design longitudinal reinforcement, stirrups and column rein forcement for common. Please enter the support width along the shorter span of slab panel. Slab is one of the most famous part of a construction project. Two way slab design to aci free download and software.
We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. Direct design method alias ddm as well as coefficient method are used to design the slabs. Reinforced concrete slab and beam design software adaptrc 2017 product overview an easytouse and learn software for the design, analysis, and investigation of reinforced nonprestressed concrete beams, beam frames, slabs. The calculation checks the design of one or twoway spanning reinforced c. Reinforcement detailing of reinforced concrete slabs. Analysis results from software are directly used in design. A slab or panel is said to be two way slab if the ratio of longer span to the shorter span is not greater than 2 two.
Here, we have tried to gather various reading materials available in the web about flat slab. Here is two way rcc slab designing excel sheet template for download. In two way slabs, load will be carried in both the directions. He developed a project economic design of two way rcc slabs and this slab. Foreword this spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. One way slab being supported on two opposite sides only leads to the structural action in single direction. Because there are joists in both directions, this floor system is the strongest and will have the least deflection. Civilax is the knowledge base covering all disciplines in civil engineering. Two way slab is a slab supported by beams on all the four sides and the loads are carried by the supports along both directions, it is known as two way slab.
Slab may be supported on walls or beams or columns. Analysis and design of slabs two way two way edge supported slabs two way slabs. Oct 23, 2019 two way slab design spreadsheet this spreadsheet performs an analysis and design of two way spanning reinforced concrete slab. Two way slab building design by staad pro v8i software youtube. Each single slabs are referred to as panels, if the slab is continuous over supports. Hidden or drop beams can be used with this system depending on their spans. Download two way rcc slab designing excel sheet template for free. Does anyone have a good reference or software package for designing a two way or one way slab. Two way slab design concrete engineering general discussion. D min 100mm for normal design and 125mm for earthquake resistant design. It looks like it is mostly geared towards flat slabs on columns, not slabs on beams. Twoway slab design for point loads structural engineering. Slabs are primarily categorized as either one way or two ways.
This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci code. In high rise buildings and skyscrapers, thinner, precast concrete slabs are slung between the steel frames to form the floors and ceilings on each level. Check longterm deflection in etabs using aci code deflection limits for slabs check for 2 way slab or 1 way slab steps for slab designing by direct design method ddm 2way slab on beams. Safis reinforced concrete slab design assistant becomes the ultimate tool for slab design in a simple and intuitive way. In two way slab, the ratio of longer span to shorter span is less than 2. Twoway joist waffle slab design approach and methodology twoway joist slab often called twoway ribbed slab or waffle slab is an economical floor system when the spans are long andor loads are high. Generally, there are two types of slab which are one way and two way slabs. If the proportion of longer dimension of the slab panel to the shorter dimension is more than or equivalent to 2 then it is defined as one way slab. Ram ss 1way vs 2way concrete slabs bentley communities. Slab engineering reinforced concrete slab design assistant. Posttensioned, reinforced concrete slab design software ram.
Download two way rcc slab designing excel sheet template. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. Slabs can be designed by direct design method known as ddm and another method for design is coefficient method which is the easier one. Bending will take place in the two directions in a dishlike fo. Slabs or foundations can be of any shape, and can include edges shaped with circular and spline curves. This can be used in conjunction with a structural analysis program such as our slab analysis tool. Analysis, design and investigation of beams, one and twoway slab systems, flat plate, flat slab, waffle slab and slab bands. Two way rcc slab designing excel sheet civil engineering. Lecture04 analysis and design of twoway slab system parti. Design of reinforced concrete structures ii twoway slabs. The topics of balance loads equivalent loads, slab thickness, punching shear, use of computer software and keys to an efficient design will be specifically covered. The rcc slab designing tool is developed by shankar toyal, student of indian institute of technology, bhubaneswar. Design of reinforced concrete structures ii twoway slabs 1 1.
Safe perform iterative uplift analysis,any one having experience how to check the results of this analysiswhat is the purpose and scope of this analysis. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. The simplified design for concrete buildings book from pca has a 40 page section on two way slabs. I wanted to see if anyone has any good literature on twoway slab design for point loads. Two way slabs supported on stiff beams or walls by. This video demonstrates the tekla tedds rc slab design calculation to the eurocode. May 09, 2018 best is subjective, so i will give my opinion here. Chicago towers wavelike design features different shapes for every floor. In this building we will design a twoway slab for rooms, a oneway slab, beam and column for verandah 23. This spreadsheet allows user to design a two way spanning reinforced concrete slab in accordance with the british standard bs 8110. Posttensioning may be included in both slabs and beams to balance a percentage of the selfweight.
Framing dead load selfweight superrimposed dead load 25 psf partitions, me, misc. Specific code sections will be discussed in conjunction with construction photographs to highlight the design concepts. Dec 26, 2019 details title one way and two way slab design as per aci, is, bs code with excel duration 30 mins language english format mp4 size 190 mb download method. Twoway edge supported ribbed slabs design methods in the aci code 31808, two empirical methods are given for analysis and design of twoway slabs. For more information on design and consultancy to accomplish the most challenging design brief, contact the author on. Waffle slab twoway pan joist twoway joist slab, also called a waffle slab. Two way rcc slab designing tool in microsoft excel developed by shankar tayal a 3rd year student of school of infrastructure, indian institute of technology, bhubaneswar.
Two way slab design spreadsheet the engineering community. Beam and slab arrangement can be the best example for one way and two way slabs. In ram concrete, the column k factor is determined based on the relative stiffness of the beams to the columns. Slab resting on walls or sufficiently deep and rigid beams on all sides. Every example ive ever seen on two way slab design is for uniformly distributed loads. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Please select the grade of concrete for twoway slab construction.
With the advent and popularity of finite element analysis software, engineers can create sophisticated models of twoway slabs supported by columns. One way and two way slabs as floor systems are the most conventional forms of. In slabs 1 and 2, by direct design method, the slab. I have seen in some posts that it is not recommended to mix 1way and 2way slab in ram ss. I am wondering if i should model the slabs as 1way and 2way slabs, or should i model all the slabs. This paper focuses on analysis of twoway ribbed and waffle slabs with hidden beams.
Mar 14, 2018 two way slab constrained have more than one panel or in section slab edge can be prevent from lifted. Flat slab system is an important division of concrete floor system. Download two way slab design excel sheet template for free. Okay, i know it is based on upper bound thorem and the solution might be unsafe.