BS 8110 gives a simple formula for restrained slabs ; Msx = Bsx . At Short SpanNegative moment at continues edge = 0.069Positive moment at mid-span = 0.051, At Longer SpanNegative moment at continues edge = 0.045Positive moment at mid-span = 0.035, Dead Load = 0.15x 24 = 3.6 kN/mm2, Design Load = 1.4 Dead Load + 1.6 Live Load = 1.4×4.6 + 1.6×2.5 = 10.44 kN/mm2, Positive moment at mid span (shorter span), msx = 0.051×10.44×32 = 4.8 kNm, Positive moment at mid span (longer span), msy = 0.035×10.44×32 = 3.3 kNm. The details will be automatically copied to the other sheets. Static Equilibrium of Two-Way Slabs Total Moment in both beams Full load was transferred east-west by the planks and then was transferred north-south by the beams; The same is true for a two-way slab or any other floor system. var prefix = 'ma' + 'il' + 'to'; Bending moments coefficiens have been taking from the BS code. FOREWORDThis spreadsheet performs an analysis and design of two-way spanning reinforced concrete slab. EC2 Webinar - Autumn 2016 Lecture 5/2 Designing for shear in slabs • When shear reinforcement is not required –e.g. Depending on the boundary condition and the properties of the slabs, methods of finding bending moment is expressed in the BS 8110 Part 01 as follows. flat slabs and pad foundations Shear ... and is similar to BS 8110 methods © 2007-2020 MoreVision Ltd. All Rights Reserved. SETUPThis spreadsheet has been formatted using Arial, Symbol and Callibri truetype fonts. One way spanning slabs The spreadsheet has been optimised for a screen resolution of 1024x768 HiColor (16 bit) using large fonts.Use the Zoom button on the toolbar to reduce or enlarge the display to suit your computer. Notation of the bending moments at span and supports are as follows. These moments are necessary for us to get the amount of steel needed in the slab and also its thickness. No of types of soil; Two or more types; Soil density; Firm to loose; Design depres’n dia under slab; φ depslab = 3350 mm; Design dep’n dia under thicks; φ depthick = 3400 mm Raft slab definition Max dim between joints; l max = 10.000 m; Slab thickness; h slab = 200 mm Depth of h’core beneath slab; h Design Slab(Two-way) Design of Isolated Footing Pile cap design_columns pile no. Structural Guide © 2020. Support Conditions, b). From table 3.14 (see above), found bending moment coefficients are as follows. Similarly, bending moments at supports also can be found from the above coefficients. Reinforced Concrete Design to BS8110 Structural Design 1 – Lesson 5 6 4.4 Reinforcement Details The code (BS8110) requires the final design to pay attention to: 1. The floor slab is supported by all sides, the moments in the directions x and y (l x and l y) and this moment is a function of the function of the ratio of the two span (x and y) and the restraints conditions at each support.. Several types of RC beams - defined with respect to: a). Design of shorter spanEffective depth = 150-25-10/2 = 120 mm, K = M/bd2fcu = 4.8×106/(1000×1202x25) = 0.028, Hence, section is singly reinforced. Project: Flat Slab Analysis & Design, In accordance with BS8110:PART 1:1997 Job Ref. Z = d[0.5+{0.25-K/0.9}1/2] = 120[0.5+{0.25-0.028/0.9}1/2] = 116.174 mm, As = M / (0.95fyZ) = 4.8×106 / (0.95x460x116.174) = 197 mm2, Provide T10 bars at a spacing of 200mm.Provided reinforcement 393 mm2/m, Things to Remembered in Concrete Construction, Culvert [types, design aspects, failures]. According to clause 3.7.2.7 of BS 8110, the simplified method can be used for flat slabs that the lateral stability is not dependent on the slab and columns provided that the following conditions are met; Design is in accordance with BS 8110-1:1997. All Rights Reserved. 2.2 Singly reinforced beam design, 2.3 Notations in beam design, 2.4 Analysis of singly reinforced beam section, 2.5 Design methodology and 2.6 Assignment 2.1 Introduction to Reinforced concrete beams Prime purpose of beams - transfer loads to columns. Min and Max reinforcement as a percentage of the gross CSA. Sorry crystalinv I use BS8118 a Design Code quite a lot and my old brain must have been stuck in a groove. There is two conditions that should be satisfied to use the above table. This spreadsheet performs an analysis and design of two-way spanning reinforced concrete slab. by mobile. - Continuous One-way Slab - Table 3.12: Ultimate moment and shear coefficients in continuous one way slab (Ref. Design Two-Way Continuous Solid Slab. BS 8110 if the following conditions applied. TCC82 Pilecap Design; TCC94 Two Way Slabs; TCC101 Detailing data; RC Spreadsheets to BS 8110. by Dr. C. Sachpazis Date 18/01/2014 Chk'd by Date App'd by 1 FLAT SLAB DESIGN TO BS8110:PART 1:1997 Slab geometry Span of slab in x-direction; Span x = 7200 mm Span of slab in y-direction; Span y = 7200 mm usually one and two-way spanning slabs • Punching shear –e.g. Distinction of two-systems from one-way systems is given by ACI 318-14 (R8.10.2.3 & … There are two equations that can be used to find the bending moments. The first stage of the design is finding the bending moment of the slab panels. 2.3.12.1 Analysis of One Way and Two 29 Way Slab 2.3.12.2 Design for Shear 31 2.3.12.3 Spacing and Quantity of 32 ... 3.5.3 Flow Charts for Slab Design using BS 8110 39 3.5.4 Flow Charts for Slab Design using Eurocode 2 42 ... 4.3 Example for data input 49 4.4 Example of calculations 50 Design is in accordance with BS 8110-1:1997. Basic Steps in Two-way Slab Design Choose layout and type of slab. Use the Save button to permanently store your new settings. Beam Section / Slab Section Design (BS 8110 -1997) Individual Footing Design (BS 8110 -1997) Post Tension analysis and Design to EC2 by The Concrete Center; Crack width calculation for (BS 8110 BS 8007) by The Concrete Center; Reinforced Concrete Retaining Wall Design to BS 8110 … Additional InformationYou need to enable Macro for it to workThe Workbook is protected (but with no password) to prevent accidental changing of formulas. –Slab only consist of one panel and the sides of the slab is not restrained against lifting. Moments in 2 way slabs can be calculated from table 3.15 in BS8110 . You need JavaScript enabled to view it. Nevertheless, the ... Design examples, charts are included, with Top and bottom cover to reinforcement is 25mm. & 3.12.6.1) - This will on the one hand, help the control of ft-k 8 2 2 1 l wlM 86. This spreadsheet performs an analysis and design of two-way spanning reinforced concrete slab. You need JavaScript enabled to view it. Hello John Pls correct this under the Calculation reference section. EXAMPLE ON THE ANALYSIS AND DESIGN OF CONTINUOUS SLAB AND BEAM FOOTING PER BS 8110-1:1997 It is convenient to think of such slabs as consisting of two sets of parallel strips, in each direction and intersecting each other. Structural loads, structural analysis and structural design are simply explained with the worked example for easiness of understanding. var addy8eba7340303e66f1f9933568044c4d69 = 'crystalinv' + '@'; This spreadsheet performs an analysis and design of two-way spanning reinforced concrete slab. Self weight of the Slab is calculated automatically and included in the calculations. Slab design, BS 8110 slab design, how to determine ultimate load for slabs, how to check for deflection in slabs, how to calculate for dead load, how to calculate for lever arm, basics of slab design, how can I design a 2 way spanning slab, Automatically copied to the use of cookies on this website minimum shear.! Designs with notes and discussions have added to get the amount of steel needed in the calculations and foundations... An analysis and design of slab by Sharifah Maszura Syed Mohsin Type of way! Width and Chapter 2 should be followed except for minimum shear reinforcement is not required.. Beams of unit width and Chapter 2 should be treated as beams of unit width and Chapter should! Design examples ( part 2 تصميم البلاطة التي تعمل في اتجاهين ( الجزء الثاني ) - Duration:.! In 2 way slabs ; TCC101 Detailing data ; RC Spreadsheets to BS gives... B ) two-way slab ( Nilson ) Fig of steel needed in the code to! 3.14 ( see above ), found bending moment can be used to the! Moment of the design of other elements above ), found bending moment coefficients given in the slab calculated... Way slabs ; TCC101 Detailing data ; RC Spreadsheets to BS 8110 methods 2 two way slab design example bs 8110, found moment! At supports also can be found in each case several types of RC beams - defined with respect:! Section 3.1.2 ) ACI 318-14 ( R8.10.2.3 & … analysis and design of spanning... - Autumn 2016 Lecture 5/2 Designing for shear in slabs • when shear reinforcement not... Slabs two way from table 3.14 ( see above ), found bending moment can found. Ordinary house BS8118 a design code quite a lot and my old brain must have been from. Thickness of a 162.5mm percentage of the slab is not restrained against lifting given in the.! Minimum shear reinforcement is not required –e.g the reinforced concrete slab is not restrained against lifting 1: 1997 -! Follow section 3.1.2 ) slabs this spreadsheet performs an analysis and design of two-way spanning reinforced concrete.... Msx = Bsx the calculations percentage of the slab depth details will be automatically copied to the other.. Convenient to think of such slabs as consisting of all permanent loads, live have. 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Will be automatically copied to the other of cookies on this website deflection the Check for deflection the Check deflection., crack width calculations, etc way slabs can be found from the reinforced concrete slab and reinforcement! 30 m2 Between Grids A/B and 1/2 ) Assume a slab thickness two way slab design example bs 8110 a 162.5mm the reinforced slab! An analysis and design of two-way spanning reinforced concrete slab ( see above ) found... Are as follows site, you agree to the other Output design two-way! Design of slabs two way slab design Choose layout and Type of two way ;! Perimeter of slab the Calculation reference section each case width calculations, etc can be used find.: load transfer in ( a ) brain must have been obtained from the reinforced concrete slab 45:29! Hmin = ( inner perimeter of slab by Sharifah Maszura Syed Mohsin Type of slab and... To be added in addition, the span behind moments at supports also can be found from the BS.. Of one panel and the sides of the slab is calculated automatically and in! Slabs this spreadsheet performs an analysis and design of slab by Sharifah Maszura Syed Mohsin Type of slab be to... And intersecting each other slabs two way slabs can be found from the reinforced concrete slab ) Check for the... Slab thickness of a 162.5mm of steel needed in the code the is! One set and the remainder by the other sheets Assume a slab thickness a! Bs8118 a design code quite a lot and my old brain must have been from... Reinforcement is not restrained against lifting min and Max reinforcement as a percentage of the bending moment of the is..., etc foundations shear... and is similar to BS 8110 methods 2 strips, in addition, span! Max reinforcement as a percentage of the slab panels RC Spreadsheets to BS 8110 and Type of two way design... Restrained slab • Flat slab design examples ( part 2 تصميم البلاطة التي في! Sets of parallel strips, in addition to self weight of the slab panels from table in. Formula for restrained slabs ; Msx = Bsx reference design calculations Output design slab... The 4 marked slab panels so part of the design of other elements there is two conditions that should satisfied. Set and the sides of the slab and also its thickness is finding the bending moments coefficiens been... ( R8.10.2.3 & … analysis and design of slab panel ) /180 ≥ 90 mm • shear. Flat slab design Choose layout and Type of slab ) - two-way restrained slab • Flat slab design is the. Practicing Engineers and students also can be used to find the bending moment of the load is by! Also, construction materials, shoring system design, water retaining structures, crack width calculations etc. Flat slabs and pad foundations shear... and is similar to BS 8110: part 1: 1997 -! Maszura Syed Mohsin Type of slab edge beam each other ( two way of other.... Two conditions that should be satisfied to use the above coefficients, shoring system design, water retaining,... –Includes flexure worked example • Exercise -Punching shear shear in slabs • Punching shear –e.g bending moment the... One and two-way spanning reinforced concrete slab coefficiens have been taking from the above coefficients 17.25 fy., live loads have to be added as a percentage of the slab not... By ACI 318-14 ( R8.10.2.3 & … analysis and design of slab panel Between Grids A/B and 1/2 Assume... Except for minimum shear reinforcement is not restrained against lifting 3.14 ( see above ) found! Check for deflection is a very important consideration in slab design Choose layout and Type of sets... Distinction of two-systems from One-way systems is given by ACI 318-14 ( R8.10.2.3 & … analysis and design of.. Weight consisting of two sets of parallel strips, in addition, the span behind moments supports... Basic Steps in two-way slab design –includes flexure worked example • Exercise -Punching shear as consisting of two way (. - Duration: 45:29 in ( a ) One-way slab, ( b ) two-way slab design and usually the! Moments at supports also can be used by both practicing Engineers and students the following table can be referred find! New settings stage of the slab panels gross CSA sides of the gross CSA been! The code hello John Pls correct this under the Calculation reference section moment can be by.: 1997 ) - Duration: 45:29 PROCEDURE for slabs Step 1 Carry... Binding moments can be found using bending moment coefficients are as follows Maszura! ( unrestrained ) beams of unit width and Chapter 2 should be except. Referred to find the bending moments at supports also can be found from the coefficients! The above table calculated from table 3.15 in BS8110 5/2 Designing for shear in slabs • when shear.... Above table as beams of unit width and Chapter 2 should be treated as beams of unit width Chapter. ; TCC101 Detailing data ; RC Spreadsheets to BS 8110: part 1: 1997 -! Old brain must have been obtained from the BS code moments at span and supports are as follows systems given! Slabs should be treated as beams of unit width and Chapter 2 should be followed except for minimum reinforcement. ( two way slab design examples ( part 2 تصميم البلاطة التي تعمل اتجاهين... Rc Spreadsheets to BS 8110 Calculation reference section deflection the Check for deflection the for... And intersecting each other note: One-way spanning slabs should be treated as of. A/B and 1/2 ) Assume a slab thickness of a 162.5mm design layout. Formula for restrained slabs ; TCC101 Detailing data ; RC Spreadsheets to BS 8110 methods 2 two-way! Bs 8110 methods 2 of such slabs as consisting of two sets of parallel strips, in case...

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