In twoway slabs shorter direction strip carry greater %age of load. He developed a project economic design of two way rcc slabs and this slab designing excel is a part of his project. Buildinghow products books volume b slabs twoway slabs. Slab member deflection check using structural toolkit slab member comparison using rapt reinforced and posttensioned concrete design software this will be a two span continuous slab 4. Design of reinforced concrete structures ii twoway slabs 1 1. The design bending moment of twoway restrained slab can be calculated as follows. General steps for the design of two way slab system by efm. The calculation checks the design of one or twoway spanning reinforced c. Slab shear strength twoway shear check the adequacy of slab thickness for punching shear twoway shear at an interior column figure 4. Slab being the first element to be designed has pretty much importance as the whole structural design is based on the design of slab. Analysis, design and investigation of beams, one and twoway slab systems, flat plate, flat slab, waffle slab and slab bands.
Accordingly, main reinforcement is required in the two directions. Hence, one way slabs have ratio between longer to shorter span greater than 2. I have developed a microssoft excel software for design of a two way rcc slab. Every example ive ever seen on two way slab design is for uniformly distributed loads. Mar 14, 2018 two way slab design spreadsheets to eurocode 2 14 march 2018 off by the engineering community two way spanning slabs for rectangular slabs with standard edge conditions and subject to uniformly distributed loads, normally the bending moments are obtained using tabulated coefficients. It can be used by both practicing engineers and students. The program covers wide range of two way slab systems and can be used for more complex slab layouts. Design of a two way rcc slab structural engineering forum. In two way slab, load is delivered in both the directions. Buildinghow team integrates all earthquake resistant building technologies.
One way slab design simplified online design of concrete. Two way slab design based on aci 31819 using finite element method. Applicability of code design methods to rc slabs on secondary. Two way rcc slab designing excel sheet civil engineering. Okay, i know it is based on upper bound thorem and the solution might be unsafe. Posttensioning may be included in both slabs and beams to balance a percentage of the selfweight. Posttensioning and reinforced concrete structural analysis. Slabs or foundations can be of any shape, and can include edges shaped with circular and spline curves. This is a part of his project economic design of two way rcc slabs under prof s. This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci. May 09, 2018 best is subjective, so i will give my opinion here. Design floors and foundations reliably and efficiently, saving time and money, and overcoming the most common concerns you face as a designer. Twoway concrete slab with beams spanning between supports.
Design of reinforced concrete structures ii two way slabs 1 1. This condition occur when the slabs are connected monolithically with support. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member. I am submitting it to you and i want students or professional engineers to download it and use it for their studies or projects. 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. Therefore, primary reinforcement is presented in both directions for resisting the loads. In two way slab, the ratio of longer span to shorter span is less than 2. Two way slab building design by staad pro v8i software youtube.
The pca computer program pcaslab can be used to expedite the design of different slab systems. Here the ratio of longer span of slab to the shorter span of slab is less or equals to 2. Two way slab design by direct design method as per aci 31811. Two way slab building design by staad pro v8i software. Design of a two way rcc slab structural engineering. Flat plate concrete floor system does not use beams between columns or. I needed a software that could both design and also present the stepbystep calculation of the design procedure so i could append to my design report. The one way slab is deflected in one way direction and primary reinforcement is placed in one direction whereas. Download two way rcc slab designing excel sheet template for free. Applying the provisions of twoway slab system to the secondary beam slab system is. I wanted to see if anyone has any good literature on two way slab design for point loads.
The rcc slab designing tool is developed by shankar toyal, student of indian institute of technology, bhubaneswar. Posttensioned concrete design spreadsheet program a pdh. The design software are developed by visual basic and ms excel interaction for each. Feb 15, 2019 construction work and civil engineering software work. The other ways of analysis of twoway slabs are the direct design method and the equivalent frame method. Structural design software engineering international. Jul 21, 2017 rapt is a two dimensional post tension beam slab design software.
Twoway slab design for point loads structural engineering. Here is two way rcc slab designing excel sheet template for download. So it was important for the engineer to understand the spanning direction. Jun 30, 2014 design calculation for two way slab as per bs 8110. There are multiple analysis methods, manual and computer analysis, available for analyzing two way slabs. Slab engineering reinforced concrete slab design assistant. The models are analyzed using standard finite element software.
Apr 18, 2019 this spreadsheet performs an analysis and design of two way spanning reinforced concrete slab. Analysis and design of slabs two way civil engineers pk. 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 under prof s. A slab supported on all four edges with an aspect ratio of longer to shorter theoretical span less than. Does anyone have a good reference or software package for designing a two way or one way slab. Adapt corporation specializes in structural concrete design software for posttensioning, reinforced concrete, and prestressed beam, slab, foundation, building and bridge structures using finite element or equivalent frame analysis. Suspended slabs can include flat, twoway, waffle, and ribbed framing systems. Models can have columns, braces, walls, and ramps connected from the floors.
Analysis of two way ribbed and waffle slabs with hidden beams. 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. Safe provides an immensely capable yet easytouse program for structural designers, provideing the only tool necessary for the modeling, analysis, design, and detailing of concrete slab systems and foundations. All traditional floor systems were designed as either one way or two way slabs. Generally, there are two types of slab which are one way and two way slabs. Its more user friendly compared to other pt design softwares. Two way slab design to aci free download and software. Analysis two way slabs are not direct as in one way slabs. This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems.
The coefficient method may be the simplest, easiest and the quickest approach for the design of two way slab supported by edge beam on all slab sides. Two way slab design spreadsheet the engineering community. In two way slabs, load will be carried in both the directions. Since slab spans in both directions, design reinforcement is provided in both the direction. Its typically used when stiffness is important or if there are abnormally heavy loads. Twoway slabs have two way bending unlike oneway slab. Because there are joists in both directions, this floor system is the strongest and will have the least deflection. Analysis results from software are directly used in design. It is recommended to create the design of slab with the use of excel sheet as the process will be very simple and lots of time will be saved. Aci 318 permits the use of direct design method ddm and.
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. This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci code. Download two way slab design excel sheet template for free. Jul 22, 2015 design of two way ribbed slab 18 x 25 m clear span 1. The output of the program for the slab in the example is shown in the following pages. Bending will take place in the two directions in a dishlike form. Twoway flat plate concrete floor system analysis and design the concrete floor slab system shown below is for an intermediate floor to be designed considering partition weight 20 psf, and unfactored live load 40 psf. Two way slab design concrete engineering general discussion.
Posttensioned, reinforced concrete slab design software ram. Twoway restrained slab if the slabs consist more than one panel or corner of the slab are prevent against lifting it is define as twoway restrained slab. Slab is one of the most famous part of a construction project. 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. Two way slab design spreadsheet this spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. This video demonstrates the tekla tedds rc slab design calculation to the eurocode. Pdf design comparison of slab system by direct design method.
Twoway slab design based on aci 31819 using finite element method. The following example illustrates the example building. Static analysis of twoway slabs, subjected to uniform load, is performed using tables, which give the fundamental support moments, span moments and shear forces. 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 slab being supported on four sides the load will be carried in both the directions. Suspended slabs can include flat, twoway, waffle, and. Waffle slab two way pan joist two way joist slab, also called a waffle slab. Design of a two way reinforced concrete slab with rcsolver software program according to eurocode 2 specifications.
The following simplified design is valid when length2width of slab and for 15ft or 4. Jun 14, 2017 download two way slab design excel sheet template. Just figure in the appropriate slab width in each direction based on the width of the point load, add in the other uniform loads over the same width strips, get the moments and reactions and design the reinforcing steel. What is the best software to design a post tension slab. One way and two way slabs as floor systems are the most conventional forms of. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Economically design posttensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality.
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