Manual design of beam and raft foundation to eurocode 2. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria. The locations of the strips are usually governed by the locations of the slab supports. The building is located in seismic zone iii on a site with medium soil.
Oneway and twoway slabs university of asia pacific. The construction and design of concrete slabs on grade d. Design principles and calculations slab design the hambro slab the slab component of the hambro d500 composite floor system behaves as a continuous oneway slab carrying loads transversely to the joists, and often is required to also act as a diaphragm carrying lateral loads to shear walls or other lateral load resisting elements. Aci 360, design of slabs ongrade, refers to this as a type b slab. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Reinforced concrete slab design and detailing guide is456. Dismantle props and remove timber plates on completion of installation of permanent steel beams.
Analysis and design of slabs one way civil engineers pk. The third chapter presents the design calculations of slab and drawing of building. Calculation package 3002 300 floor and roof framing calculation index. Figure 5 sample calculations using ddm from twoway flat plate concrete slab floor analysis and design design. Pdf design of flat slab worked example mohamed hussein. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. The slab is 300 mm thick and columns are 400 mm square. Roof slab r17, ex1 to 2 14 snow loading s1 to s2 15 wind loading wl1 to wl 6 16 proposed roof plan and details drawings 30950031010, 1011 and 5010 structural calculations code and standard used bs en 1990. The construction and design of concrete slabs on grade. It was actually the widespread use of the posttensioned slab onground which induced this interest in design procedure and in many studies of reported slab failures. The slab has to carry a distributed permanent action of 1.
In any span, the max cable sag, zd depends on the concrete cover requirements and the tendon dimensions. Design of sections and reinforcement arrangements for slabs, beams, columns and. Analysis to determine the maximum moments, thrusts and shears for design design of sections and reinforcement arrangements for slabs, beams, columns and walls using the results from 3 production of arrangement and detail drawings and bar schedules this structural design process has been carried out under use of bs8110 design code of practice. Determine whether the slab geometry and loading allow the use of the direct design method as listed in ddm. Designer individuals designated by the structural engineer to use this manual to design and detail culverts. The recommendations derived from these and other studies vary from extremely light to extremely heavy. Manual design of beam and raft foundation to eurocode 2 free. Oneway slabs normally design as a beam with cables running in the direction of the span at uniform centres.
Design the slab following the provisions of the aci code. Conc slab, pt slab design strip key plan 312 conc slab, pt slab design strip design 3 conc slab, pt slab punching shear key plan 314. How to calculate load for design of rcc structures. Twoway slab design static equilibrium of twoway slabs total moment in both beams full load was transferred eastwest by the planks and then was transferred northsouth by the beams. Quick guide to design of one way slab with is code 456. Simply supported one way slab minimum and maximum reinforcement area, a s,min 0. Flat slab analysis, design and detailing pdf civil engineering.
Reinforced concrete design 1 design of slab examples. Structural design of a reinforced concrete residential. For flat plate slab system, the minimum slab thickness per aci 31814 are. One way slab design procedure with example design of one. Q design a floor slab for an interior room, with clear dimensions of 3. When zd is determined, the prestressing force required to balance an. Pdf design calculation design of one way slab slab s1 span of. Select slab thickness to satisfy deflection and shear requirements. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Pdf design calculation design of one way slab slab s1 span. Extend horizontally from center line column at least 16 center line span. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Design of reinforced concrete structures eciv 3016.
Design the slab, following the provisions of the aci code. The trial depth is selected based on spandepth ratio of 7, as in is. Areas of fill should be avoided or limited as much as possible. Structural design of a reinforced concrete residential building. Considering m20 grade of concrete and fe 500 steel of diameter of 10 mm effective depth. The axial force, moments and shears for a particular strip are recovered from the analysis on the basis of the wood armer tech. Design principles and calculations slab design table 1 slab capacity chart total load in psf joist spacing slab d thickness t inch 41 14 exterior interior t design of slab examples and tutorials by sharifah maszura syed mohsin example 1. In this article, it is assumed that slab thickness is determine but calculation of column and middle strips is explained in the following section. Asce, secb course content slab on grades construction.
Practical structural analysis and design of residential buildings using staad pro v8i, csc orion, and manual calculations. Design calculation design of one way slab slab s1 span of one way slab l 2 m section provided. Twoway flat plate concrete floor system analysis and. In this video deisgn of two way slabs has been covered using is 456. Slabs are usually used in floor and roof construction. Twoway joist concrete slab floor waffle slab system. Online concrete slab on grade analysis calculator for slab subjected to interior concentrated post or wheel loading assuming slab is reinforced for shrinkage and temperature only. Design of cantilever slab civil engineering youtube. Concrete slab on grade analysis calculator for post or. Before the start of two way slab design, slab depth should be determined in addition to specify column strips and middle strips. Design of reinforced concrete structures ii twoway slabs.
Tm 580912 concrete floor slabs on grade subjected to. Any changes in slab depth, levels or movement joints within the live perimeter a general layout drawing may be required alternatively, you may prefer to gather the relevant data and produce a calculation and design layout yourself using the linkstudpsr online design software available later in 2010 or by using the long hand. These calculations shall govern the structural portion of the working drawings. According to the way loads are transferred to supporting beams and columns, slabs are classified into two. However, where any discrepancies occur between these calculations and the working drawings, the engineer shall be notified immediately so proper action may be taken. Fill height the vertical distance from the top of the top slab of a. They are projections from wall face of lintel beams or floor slabs. The same is true for a twoway slab or any other floor system where.
Design of cantilever slab spreadsheet engineering books. A finite element model may be created to analyse a complicated loading arrangement. Please read the lauses mentioned in the video while solving the problem. Tm 580912 concrete floor slabs on grade subjected to heavy. Introduction concrete slabs on grade are a very common type of concrete construction. Flexible pavement design excel calculator flexible pavement design, calculator, sn, aashto design, structural number grdslab concrete slab on grade analysis excel spreadsheet. The result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete. Design of slabs onground aci 360r06 by american concrete institute 2006 4. Bm and sf coefficients for flat slab or 3 or more equal spans outer support column wall near centre of 1st span first interior span centre of interior span interior span moment 0. Now, if we consider the finishing load to be 1 kn per meter and superimposed live load to be 2 kn per meter.
Mar 23, 2015 the column heads may be provided with any angle from the consideration of architecture but for the design, concrete in the portion at 45. Calculators for structural engineers, construction professionals and steel building specifiers. Design of slab examples and tutorials by sharifah maszura syed mohsin. The design bending moment of twoway restrained slab can be calculated as follows. Reinforced concrete design 1 design of slab examples and. For this slab system, the minimum slab thicknesses per aci 31814 are. Even while designing they are considered as one slabs with cantilever fixed or continuous at supports. Calculations for columns 3 through 7 performed by spreadsheet attached typical calcs. This chapter is therefore concerned with the calculation of the design moments for slabs under different support conditions. Reinforced concrete slab design guidelinesa effective span of slab. Such calculations require a knowledge of the supporting beam or column dimensions a reasonable. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Download the full calculation sheet from the link below.
Concrete slab on grade analysis calculator for post or wheel. Floor loads also include working ff 25 psf, rw 50 psf. For slabs spanning in both directions published tables and charts should be used to find bending moment and shear per unit width of slab. It is estimated that a concrete slab lasts for about 30 to 100 years if it is built with good grade of. A reinforced concrete slab is built integrally with its supports and consists of two equal spans, each with a clear span of 15 ft. No attempt is made to finish the rebar design for required lengths or the number of bars to be carried continuously as this is concrete design. Helloin this video cantilever slab is design as per is. Assume partitions cannot be damaged by deflections. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. A six storey building for a commercial complex has plan dimensions as shown in figure 1. So, the selfweight of each square meter of the slab would be 0. Ce 433, summer 20 slab design example 1 5 design a one. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Connection design calculations can be found in appendix a300.
Distinction of twosystems from oneway systems is given by aci 31814 r8. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Tensioning building structures march 12, 2020 2020 educode las vegas. The service live load is 116 psf and 4000 psi concrete is specified for use with steel of yield stress equal to 60,000 psi. The slab is for an offi ce where the specifi ed load is 1. This example focuses on the analysis of flat plates using efm. Member design reinforced concrete one way spanning slab. Design a cantilever projecting out from a room slab extending 1. The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. A slab strip of unit width is analysed using simple beam theory.
Twoway slab analysis and design aci 318 states that a slab system shall be designed by any procedure satisfying equilibrium and geometric compatibility, provided that strength and serviceability criteria are satisfied. However, under certain circumstances it may be preferable to base design on the seventeenth edition of the aashto standard specification for highway bridges instead. This report presents the structural engineering calculations of a posttensioned flat slab supported on columns, using hong kong building code hkcop 2004 and its amendment of june 2007. Point load this problem is designed to demonstrate how to check the ability of a composite slab to carry a 3000 lb point load over an area of 4. With some limitations, reinforcement for slabs can be sized using the subgrade drag theory in order to increase the spacing of control or construction joints. Following are the rcc slab design and detailing guidelines. Mar 09, 2015 engineering calculation sheet consulting engineers jxxx consulting e n g i n e e r s 5 relevant panels relevant panels member design reinforced concrete one way spanning slab bs8110 v2015. Slab thickness design for industrial concrete floors on grade is195. Flat slab analysis, design and detailing pdf civil. Design example of a six storey building iit kanpur.
Design methodology design methodology simplified method table 3. Pdf design calculation design of one way slab slab s1. A brick wall of 250 mm thickness including plaster of 1. Ce 433, reinforced concrete design summer 20 example slab design 1 2 material properties geometry compressive strength of concrete fc 5,000 psi span length of slab beam spacing l 18 ft center to center coefficient for depth of stress block 1 0. Culvert extension a portion of a culvert built beyond the limits of a previously existing culvert. Manual design of beam and raft foundation to eurocode 2 pdf references ubani o. Good subgrade drainage is also important to reduce risk of frost heave on exterior slabs as well as swelling and shrinking.
Designing of slabs depends upon whether it is a oneway or a two way slab, the end conditions and the loading. M ed is that part of the unbalanced slab bending moments that is transferred into the column at the support. Two way slab design by direct design method as per aci 31811. Load and resistance factor design lrfd bridge design specifications and the current interims as the primary standards for the design of bridges in the state of new mexico. Introduction part b of the design report presents a prestressed concrete interior girder as well as the reinforced concrete deck of a 25meter bridge. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is 456. Critical beams beam 1 layout calculation and design type. Stresses in floor slabs on grade resulting from vehicular loads a re a function. Design calculation for slab civil engineering portal. The structural calculations included here are for the analysis and design of primary structural system.
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