# Slab Design Example

thanks for. The footing thickness is 1ft 9in. For slabs spanning in both directions published tables and charts should be used to find bending moment and shear per unit width of slab. 1 Insulation and Fenestration Requirements by Component E402. (ii)For New culvers, Span can ascertained as per Site condition or as per Design. It is full. The design procedure separately incl udes determining thickness of slab under wall load. This theory again mentioned that the design moment must follow Lewe’s theory (1920, 1922) or theory developed by Marcus (1924). Singleanddouble. Your slab is to be the same width as your building, and 2″ longer. hmin = (inner perimeter of slab panel)/180 ≥ 90 mm. Download Free Excel Spreadsheet For Concrete Design of Two Way Slab, Voided Biaxial Slab, Anchorage to Concrete, Anchorage to Pedestal, Circular Column, Concrete Column, Super Composite Column, Special Shear Wall - CBC, Ordinary Shear Wall,Concrete Pool, Corbel, Coupling Beam,Deep Beam, Concrete Development & Splice, Equipment Mounting, Existing Shear Wall, Friction,Pipe Concrete Column, PT. 1 Robert Maillart’s Contribution. wSD = 20 psf wLL = 80 psf f'c = 4000 psi fy = 60,000 psi span. The reinforcement is typically shown as a standard detail. Thickness of Slab4 3. 16 Two-Way Slabs, Direct Design Method 492. Rectangular Beams and One-way Slabs Page 3 of 9 Design of Rectangular Beams and One-way Slabs (Continued) a = β1 c Where β1 = 0. This types of slabs are mostly used in the floor of multi-storey buildings. Content rating: Average page rating: 4. They're quick and inexpensive to build and are great in southern climates where the freezing depth in the soil is shallow. 4 Summary of a Design Example with Soft Soil. 0 Transfer Structures 11. I need help to design a slab on grade. Buettner and Roger J. Design of cross-girders and slabs in ladder deck bridges Abstract Deck slabs in ladder decks span longitudinally between transverse cross-girders and the primary function of these cross-girders is to support the deck slab. So again - it is important to settle on your shed design first, before thinking about slabs. 10 — Distribution of load on a beam supporting a two-way spanning slab 41 Figure 3. 0 ksi Railings: 3. A comparison of experimental and PSC method results of the load-carrying capacity of the composite slabs revealed that agreements between these values are sufficiently good. Include four examples in your journal. The 2012 edition of the Reinforced Concrete Design Manual [SP-17(11)] was developed in accordance with the design provisions of ACI 318-11, and is consistent with the format of SP-17(09). Main reinforcement in slab bridges is designed for Flexural Resistance (5. SOIL CONDITIONS The design procedure shown in this report is based on the use of the “effective P. Introduction 4 1. 1 Design a floor slab simply supported over a clear span of 3m. Concrete floor slabs on grade are subjected to a variety of loads and loading conditions. The intended audiences for the use of this document are members of PTI's Slab-on-Ground Committee as well as engineers and others involved in the design of foundations for residential and other low-rise structures. It covers the complete range of concrete elements and includes numerous data sheets, charts and examples to help the designer. Chapters 1. It should be noted that even the best design often requires reconciliation with the actual means, methods, materials, and site conditions. You should make your slab 4” wider than the width of your steel building and 6” longer. Raft foundation. Pro model that has been successfully analyzed, because you will want to have the support reactions available for the foundation design. tool for the analysis and design of concrete slabs. Combined Footing Design. View example in PDF Format (Design Example 1) Download example as a Mathcad Workbook (Zip) Cast-in-Place Flat Slab Bridge Design. 0 metre back from the edge of exaction to ensure no plant encroaches into this zone. Determine suitable dimensions for the effective depth and width of the beam. The publication has derivations of equations and design examples that show how as steel area increases more crack width control is gained. Foundation design options for heavily loaded structures such as mid- to high-rise buildings or. span composite beams at 10 ft. This is a part of his project ‘Economic design of two way RCC slabs’ under Prof S. Move to right to post spacing, y = 98. Design Span Length be adjusted as per S. Minimum Depth. alfanar Precast provides double tee and single tee slabs with standard width of 2400 mm/ 1200 with span from 8 to 32 meters, 2 production lines, 150m long each, depths: 400, 500, 600, 700, 800, 900 and 1,000 mm. This guide presents information on the design of slabs-on-ground ON ACI 318R, primarily industrial floors. Other counters will cost more because they will require extras, like backsplashes, cut-outs for sinks, etc. A geotech friend called with a question about a steel gable-frame building that had suffered significant distress. In 1902, Maillart has successfully developed dimensioning procedure to design a flat. 2″ thick brick tile. This theory again mentioned that the design moment must follow Lewe’s theory (1920, 1922) or theory developed by Marcus (1924). Assume partitions cannot be damaged by deflections. One and Two Way Slab Quantity. BRIDGE APPROACH SLAB ANALYSIS AND DESIGN INCORPORATING ELASTIC SOIL SUPPORT _____ A Thesis presented to. The Construction and Design of Concrete Slabs on Grade D. Columns may use up to 6% rebar, partly because the rebar carries both tension and axial forces. 7 - Sleeper slab. If desired, moment in the sleeper slab may be determined assuming the wheel load is applied at the midpoint of a length assumed to bridge over settled fill, say a 5 ft. shown on pages 42 and 43 of our Design Manual and Catalog of Steel Deck Products. NHI Course 130081 - Load Resistance Factor Design (LRFD) for Highway Bridge Superstructures, Design Examples (PDF, 7. praveen reddy 08241a0128 v. addresses the design and construction of jointing sys tems for concrete street pavements. 0 Cantilevers 10. SOUTH AFRICAN NATIONAL STANDARD Concrete floors Part 1: Bases to concrete floors Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www. 3 Prestressed Flat Plates 1 2. In this article the discontinuity layout optimisation (DLO) procedure which has been used to automate the yield-line method is briefly described and then applied to various example problems. Example on Design of Slab Bridge Design Data and Specifications Superstructure consists of 10m slab, 36m box girder and 10m T-girder all simply supported. when compared with non-composite design. Minimum Depth of 2-Way Slab for Deflection Control. 1 Loads 4 3. In another example, the ground, first and second floor slabs of the Faculty of Divinity at the University of Cambridge were also analysed using LUSAS. The slab thickness is determined from Figure 3a to be about 5-1/2 in. This course presents information on the design of slabs-on-ground, primarily industrial floors. An example is carried out to design a spread footing according to EC 2, DIN 1045, ACI and ECP codes. This also locks in your steel price, so when you’re ready for fabrication, any increases in the price of steel won’t affect you. This type of slabs or flooring system consists of series of small closed. As the shear span length increased, the failure/design load of slab decreased. The gravity load framing system consists of wood-frame bearing walls for the upper stories and concrete bearing walls for the lower story. Design of Bridge Slab Spreadsheet 31 October 2018 Off By The Engineering Community Reinforced Slab Bridges used For short spans, a solid reinforced concrete slab, generally cast in-situ rather than precast, is the simplest design to about 25m span, such voided slabs are more economical than prestressed slabs. After sometime later, requirements for the flat slab design theory were established. 1) Trail depth and effective span Assume approximate depth d =L/26 3500/26 = 134 mm. Inroduction When the ratio (L/S) is less than 2. Calculate your unfilled deck diaphragm shear and stiffness for your exact. The Nexa Slab f ont family contains 3 basic forms: italics, obliques and uprights, each of which has 8 different weights. Excel Sheet to Design Slab – One Way and Two Way >. The overall depth of the slab without finishing materials is 300mm. 3 Limit States Design Method 18. The recommendations derived from these and other studies vary from extremely light to extremely heavy. EC2 Worked Examples (rev A 31-03-2017) Latest Version Page 6 FOREWORD The introduction of Eurocodes is a challenge and opportunity for the European cement and concrete industry. For precast box culverts, the design earth cover shall be reported as the elevation difference between the point of maximum fill and the top of the top slab. … Continue reading Footing and Slab Plans →. Before going to this topic, Please read it. Reinforcement for Slab5 4. Instructional Materials Complementing FEMA P-751, Design Examples Reinforced Concrete Footings: Basic Design Criteria (concentrically loaded) d/2 (all sides) (c) Critical section for two-way shear (b) Critical section for one-way shear (a) Critical section for flexure Outside face of concrete column or line midway between face of steel column. Sachpazis Date 23/04/2013 Chk'd by - Date App'd by Date RAFT FOUNDATION DESIGN (BS8110 : PART 1 : 1997) Raft and soil definition Soil definition Allowable bearing pressure; q. For instance, in harsher climates. Normal-weight aggregate concrete is specified with a density of 145 pcf. Two-Way Joist (Waffle) Slab Design Approach and Methodology Two-way joist slab often called two-way ribbed slab or waffle slab is an economical floor system when the spans are long and/or loads are high. Civil Engineering Design (1) 6 Dr. 2 Depth 4 3. Caprani Civil Engineering Design (1) 11 Dr. Economically design post-tensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. The deck may consist of 3 girders spaced at 2, 45 m. Modeling Structure RFEM 5 allows you to perform the punching shear design for both 2D slab and 3D structures. 1-Go to slab thickness and define your slab similar to this picture. 9 — Division of slab into middle and edge strips 39 Figure 3. , appendix b design examples appendix c references tf 700-r-07. The output of the program for the slab in the example is shown in the following pages. Using the PCA design chart starting with the slab stress to the contact area, the wheel spacing for our example problem requires a slab thick-. CALCULATE VERTICAL LOADS (concluded) 101,228 lbs. (two way slabs) are continuous with verandah (one way slab). Minimum Depth of 2-Way Slab for Deflection Control. values established for each swell mode (edge and center lift) Design cannot be. Slab Reinforcement. There are two or more spans. Analysis and Design of One-way Slab: Design steps: Step 1: Preliminary Design: Find depth of slab using deflection control criteria. edu is a platform for academics to share research papers. The uninitiated think, Well pouring a slab is simple, right? I'll just get that part of the project all finished up, then call and order a steel building to fit my slab. 65 C = T ⇒ 0. It consists of either the design truck or a combination of design truck and design lane load. A numerical design example is included. Guidance is. 3 m Slab load, w = 10 kPa. EC2 Worked Examples (rev A 31-03-2017) Latest Version Page 6 FOREWORD The introduction of Eurocodes is a challenge and opportunity for the European cement and concrete industry. The program covers wide range of two-way slab systems and can be used for more complex slab layouts. Including steel fabric design. First step is to generate moment envelope. Concrete compressive strength (fc′) = 3 ksi. The latest edition of this well-known book makes available to structural design engineers a wealth of practical advice on effective design of concrete structures. 3 Design of Two-Way Slabs by the ACI Code, 488. Slab Reinforcement. Concrete elements include: structural slabs, beams, and columns; slab-on-grade (parking); foundation walls; footings. This current revised recommendation provides bulk material pressures for silos. However, plastic method can be the best method for designing such cases of two-way slabs. Now to illustrate the design principles, one worked out example is presented below: Example: Design a solid slab skew bridge having a clear span of 7. View example in PDF format. 4/22/15 2015&NebraskaBridge&Conference& 1 HS20-44 vs HL-93 (Standard Specifications vs LRFD Code) Fouad Jaber, P. Design of two way slabs(d. A geotech friend called with a question about a steel gable-frame building that had suffered significant distress. 0 Transfer Structures 11. the design, the link slab also acts as a semi-rigid link between spans transferring compressive, tensile, and shear stresses due to horizontal loads. Example 2: Continuous one way slab. 2); a strip footing on clay (Example 10. Design of Slab (Examples and Tutorials) by Sharifah Maszura Syed Mohsin Example 2: Continuous one way slab Figure 1 shows a clear area of 12 m x 8. Both use the subgrade drag equation for calculating the steel areas. Pro US Example No. Footings and Slabs Cornell Engineers specialise in footings and slab plans for new houses, extensions and renovations. 5 it behaves as one-way slab. However, it may usually be necessary to adopt reinforced concrete design with continuity of vertical bars in these load bearing walls. Design a 1′ wide strip of wall. In another example, the ground, first and second floor slabs of the Faculty of Divinity at the University of Cambridge were also analysed using LUSAS. This course presents information on the design of slabs-on-ground, primarily industrial floors. The web thickness at 5 ft (1. Main reinforcement in slab bridges is designed for Flexural Resistance (5. Waffle slabs are preferred for spans greater than 40 feet (12 m), as they are much stronger than flat slabs, flat slabs. Identify the material. 6 Conclusions 56 3. Buettner and Roger J. Design Span Length be adjusted as per S. In 1902, Maillart has successfully developed dimensioning procedure to design a flat. The deck may consist of 3 girders spaced at 2, 45 m. This is a program exclusively for designing slabs. SOUTH AFRICAN NATIONAL STANDARD Concrete floors Part 1: Bases to concrete floors Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www. 2 Beams Rectangular beams, inverted L-beams, T-beams 44 3. Slab Design Example Post-tensioned, un-bonded one-way slab with draped tendons (midspan moments will be assumed to control) , where is the area of the entire section shown above and is the shaded area. Passive Pressure. Reinforced concrete structures II – Ribbed slab Example 2 1 Example 2. Calculating the subtotal for the floor, ceiling, walls, footing, and slab: Solution for #5: The total dead load of the structure can be found by adding the two. 6 Section modulus of design section 128. Buettner and Roger J. This required special care during the design of the exposed connections of the perimeter steel diagonal braces to perimeter steel beams. conventional CBR flexible pavement design meth od but rounded it off to 6. 5 kN/m 2 and tandem axle load of 100kN (300kN/3m lane width). This is a must have book for structural engineers. 65 C = T ⇒ 0. Engineering and Design STRENGTH DESIGN FOR REINFORCED CONCRETE HYDRAULIC STRUCTURES. 2 Flat Plates 1 1. Instructional Materials Complementing FEMA P-751, Design Examples Reinforced Concrete Footings: Basic Design Criteria (concentrically loaded) d/2 (all sides) (c) Critical section for two-way shear (b) Critical section for one-way shear (a) Critical section for flexure Outside face of concrete column or line midway between face of steel column. Design, hardware, what's in the box The charger is a big, flat rectangle, with a plastic base, rubber feet, and an anodized aluminum bumper in some kind of bronze/brown/purple — it's a good color. Sog_project_example_11 030206 MNL 424 STRUCTURAL CALCULATION FOR THE POST-TENSIONED SLAB-ON-GROUND OF SUNSHINE PROJECT California March 2006 Reference: SOG USER MANUAL, ADAPT Corp. (ii)For New culvers, Span can ascertained as per Site condition or as per Design. They're quick and inexpensive to build and are great in southern climates where the freezing depth in the soil is shallow. Contents1 A Rational Approach to Flat Slab Design2 Abstract 3 1. 2 Analysis of Two-Way Slabs, 495. Likes (Received) The answer depends on a few things which you will need to provide: - The strength of the concrete mix. The edges of the slab are thicker (as wide as 24”) in order to allow for extra strength around the perimeter. Form Procedure. No design provisions are available for sleeper slabs. They're quick and inexpensive to build and are great in southern climates where the freezing depth in the soil is shallow. 2) and design the cast in place anchor bolts according to the arrangement shown. 1 Introduction, 492. Design examples The following design examples for two d i f ferent joint spacings illustrate how to select reinforcing steel for controlling cracks caused by shrinkage and tempera-ture effects. Table 3 presents the external loads. Excel sheets are often very useful to determine the slab thickness and reinforcement detailing. Note: File is not password. Title: Lecture 25 Design of TwoWay Floor Slab System 1 Lecture 25 - Design of Two-Way Floor Slab System. The composite slab which has to be placed on a conference hall has been selected for this project. The PDF covers the following topics: Properties of flat slab. The design load combinations are as follows. 1 Worked example A simply supported beam has an effective span of 9 m and supports loads as shown. Mike Bather 64,074 views. The ability of UHPC to develop ultimate tensile strains up to 0. The article “Foundations for Metal Building Systems” in the July 2013 issue reminded me of a case from a couple of decades ago. Tables 4 and 5 present the wall and support properties respectively. 1 Design example (slab base) A built-up steel column comprising two ISWB 400 RSJ sections with their webs spaced at 325mm and connected by 10 mm thick battens transmits an axial load of 2000 kN. Steel yield strength (fy) = 40 ksi. Web dimensions, as determined by negative-moment requirements at the supports,arebw =11in. Normally the entire building, 10 to 15 levels, is carried by a transfer slabs. Three-dimensional (3D) Finite Element Software for Analysis and Design of Concrete and Post-Tensioned Floor and Foundation Systems. Tab 1 - slab design input required data constants - change only if necessary calculated data b Notations: t concrete compressive strength, f'c typical steel strength, fy Steel reinforcing ratio, r % Unit width of measure, b Minimum requirements: bar diameter bar spacing final dosage requirements Q. PCI MANUAL FOR THE DESIGN OF HOLLOW CORE SLABS SECOND EDITION by Donald R. and Design of Residential Slabs-on-Ground, BRAB Report #33. • Connection details for supported beams and slabs. A short tutorial showing how the main reinforcement in a simply supported slab is designed using EC2. 0 Proudly developed in the United States of America July 2016. EC2 Worked Examples (rev A 31-03-2017) Latest Version Page 6 FOREWORD The introduction of Eurocodes is a challenge and opportunity for the European cement and concrete industry. Table 3 presents the external loads. The recommendations derived from these and other studies vary from extremely light to extremely heavy. His analysis suggested that the current slab design (1914) underestimated the moments by 30 to 50%. Loading – Single lane of Class 70-R or two lanes of Class A:. ACI design factors for calculating shear and moment in slab Limitation. 3 - Added requirement to submit design calculations in PDF format Section 1. Foundation Design Generalized Design Steps Design of foundations with variable conditions and variable types of foundation structures will be different, but there are steps that are typical to every design, including: 1. These design codes, considered to be the most advanced in the world, will lead to a common understanding of the design. Example: Design the 4 marked slab panels of an ordinary house. There’s no single method for design of non-suspended slab. The program covers wide range of two-way slab systems and can be used for more complex slab layouts. Institute (PTI) Design Procedure for designing post-tensioned slabs-on-ground. DESIGN OF SLABS-ON-GROUND 360R-3 A4. For Slab Subjected to Concentrated Post Loading (for k = 100 pci) Per PCA "Slab Thickness Design for Industrial Concrete Floors on Grade" - Figure 7b, page 10. • Effects of lateral drift and internal member deformations may be considered together or independently. Floor slabs can range from a simple residential basement slab to a heavy-duty industrial floor. Thick concrete slabs are more favorable for upper steel structure. The term 'slab-serif' itself is relatively recent, possibly twentieth-century. Design Step 2 - Example Bridge Prestressed Concrete Bridge Design Example Materials Concrete strength Prestressed girders: Initial strength at transfer, f¢ ci = 4. Humans walk on flat planes of concrete called. slab was designed for gravity and wind load in accordance with ACI 318-83. The basic. 1 Robert Maillart's Contribution. The main objective of this project is to analyze and design a multi-story building (3D-dimensional reinforce concrete frame), the design of reinforced concrete slabs, beams, columns, footings and. Any section along the moment slab should not fail in shear, bending, or torsion when the barrier is subjected to the design impact load. 5 [m] thickness has dimensions of 2. Concrete floor slabs on grade are subjected to a variety of loads and loading conditions. (two way slabs) are continuous with verandah (one way slab). Appendix 5—Design example using shrinkagecompensating concrete. 1990 Reinforced concrete: design theory and examples, E FN Spon. Concrete Deck Slabs on I-Girders, U-Beams, Spread Box Beams, Spread Slab Beams, Steel Plate Girders, and Steel Tub Girders ♦ Materials ♦ Geometric Constraints ♦ Design Criteria ♦ Detailing 3. This section will explain how the direct design method is used. Thus, research on skew slab-and-girder bridges with the goal of developing design criteria that include the effects of skew is desirable. “ Slab helps us onboard new reps faster and keep our processes streamlined. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types; one-way and two-way. Beam and slab arrangement can be the best example for one way and two way slabs. Each bridge is formed by steel girders acting compositely with a reinforced concrete deck slab. The design cuts will start at the face of the columns with the exception set by ACI 318-14 Section 8. The diagram to the right shows and example of a slab on grade that is structurally and thermally isolated. Reinforced Concrete Design Examples CHAPTER 1 REINFORCED CONCRETE STRUCTURES, Introduction, Reinforced concrete members, Download www. such as cross beam depth & width, slab thickness per use, amount of steel, number of beams, density of required concrete. You should contact an architect, engineer or experienced concrete contractor in your geographic region for specific recommendations regarding the best practices in your area. Thickness of Slab4 3. This section will explain how the direct design method is used. Design a 1′ wide strip of wall. Design the slab following the provisions of the ACI code. This required special care during the design of the exposed connections of the perimeter steel diagonal braces to perimeter steel beams. Slabs are classified into 16 types. Notes Author Staff - BridgeSight Software Sponsor BridgeSight Software. slab was designed for gravity and wind load in accordance with ACI 318-83. Good descriptions of how slabs behave and how this relates to design. 2—Example selecting the optimum amount of reinforcement to maximize the compressive. Analyze and design flat slab or waffle slab floors. Design Span Length be adjusted as per S. Sandwich slab reinforcement details In reality, sandwich slabs are ribbed slabs with a slab placed both to their upper and lower surface. 5 m along the roadway without any footpath and a skew angle of 25 degrees with IRC loading for N. - Structures Design Bureau. 2″ thick brick tile. It depends on purposes and location, but there several construction and design methods for non-suspended slab. Example 1: This is an example of two slabs with no Analysis offset. E-Mail [email protected] Concrete Deck Slabs on Adjacent-Framed Beams (Slab Beams and Box Beams) ♦ Materials. Reinforcement for Slab5 4. The slab may be supported by walls or by reinforced concrete beams usually cast monolithically with the slab or by structural steel beams or by columns, or by the ground. It covers the complete range of concrete elements and includes numerous data sheets, charts and examples to help the designer. 0 m centers. 85 for f c’ ≤ 4,000 psi, and decreases by 0. The design procedure includes determini ng slab thickness based on moving live loads and then checking adequacy of slab thickness for stationary live load. design for the maximum temperature range that the slab will experience during its service life. 1 Direct Design Method (DDM) For slab systems with or without beams loaded only by gravity loads and having a fairly regular layout meeting the following conditions:. 8 Design Stage of a Proposed Public Housing Development Project Housing Department 1 41 71 95 119 141 163 195. EC2 Worked Examples (rev A 31-03-2017) Latest Version Page 6 FOREWORD The introduction of Eurocodes is a challenge and opportunity for the European cement and concrete industry. Appendix 4—Slab design using post-tensioning. Pro model that has been successfully analyzed, because you will want to have the support reactions available for the foundation design. It should be noted that even the best design often requires reconciliation with the actual means, methods, materials, and site conditions. for the slab. sandeep reddy 09245a0104 department of civil engineering gokaraju rangaraju institute of engineering and technology bachupally, hyderbad-72. 7 Water Supply to Tai Long, Lantau Island Water Supplies Department WORKED EXAMPLE NO. Post-tensioned slabs can be designed to be crack free and therefore waterproof slabs are possible. Background information on design theories is followed by discussion of the types of slabs, soil-support systems, loadings, and jo. View example in PDF format. To make distinctions between the equations quoted from the Code and the equations derived in this Manual, the former will be prefixed by (Ceqn) and. • Second order effects may be accounted for according to the simplified method of the design codes. 2 m Beam width, b = 0. ACI 318-11 Crack Width Calculations For Slab. Slab-On-Grade Construction - Technical Guide Deciding to build your home with a slab-on-grade foundation instead of a conventional basement or raised crawlspace foundation can greatly reduce your environmental impact during construction, and has the potential to offer significant financial savings as well. sition in the slab. 6 Design load 12. Likes (Received) The answer depends on a few things which you will need to provide: - The strength of the concrete mix. For example, slabs with a geometric design (such as Rockwell or Memphis) have a more consistent stroke width, which makes them easier to read, so they’re great for text. You can lay slabs for paving hard surfaces on sidewalks, entrances, patios and more. Design drawings should clearly show all these details. 0 Design Codes 2 2. 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. Effective Span of Slab3 2. This required special care during the design of the exposed connections of the perimeter steel diagonal braces to perimeter steel beams. the slab, as per Fig. and TxDOT LRFD Bridge Design Manual 8" Slab with std. A geotech friend called with a question about a steel gable-frame building that had suffered significant distress. Achievement of this objective depends upon careful design, detailing and construction. 5 m along the roadway without any footpath and a skew angle of 25 degrees with IRC loading for N. The overall depth of the slab without finishing materials is 300mm. The bearing of the slab on the supporting walls may be taken as 230 mm. Different types of shear reinforcement used at column heads. such as cross beam depth & width, slab thickness per use, amount of steel, number of beams, density of required concrete. The proposed slab system must be able to be constructed at a reasonable cost. Normally the entire building, 10 to 15 levels, is carried by a transfer slabs. 0 ksi Substructure: 3. Foundation Design Generalized Design Steps Design of foundations with variable conditions and variable types of foundation structures will be different, but there are steps that are typical to every design, including: 1. Structure magazine a practical design for thin composite structure magazine a practical design for thin composite composite slab reinforced with profiled steel decking structure magazine a practical design for thin composite. Section 2: Concrete Deck Slabs on I-Girders, U-Beams, Spread Box Beams, Spread Slab Beams, Steel Plate Girders, and Steel Tub Girders Anchor: #i1350427 Materials. road slab (rectangular and with sides parallel to the sides of the road slab). Civil Engineering Design (1) Analysis and Design of Slabs 2006/7 Dr. This example taken from Example 8 on page 71 of ACI 355. Design a one-way slab for the inside of a building using the span, loads, and other data given in Figure 1. It should be noted that even the best design often requires reconciliation with the actual means, methods, materials, and site conditions. Raft Foundation Design for a Typical 2 Storey House Example (BS8110 : PART 1 : 1997) Job Ref. Slab R‐Value Table 402. 4] The empirical design method may only be used if the following conditions are satisfied: Cross frames are used throughout the cross-section at lines of support,â ¢ Supporting components are made of steel and/or concrete,â ¢ Deck is cast. The article "Foundations for Metal Building Systems" in the July 2013 issue reminded me of a case from a couple of decades ago. Getting started 9 3. Determination of bending moment and shear force. * Rectangular bases. Calculate loads from structure, surcharge, active & passive pressures, etc. A debonded zone under the link slab equal to 5% of the two adjacent girder spans to prevent stress concentrations was suggested [9]. Axially loaded columns 14. Columns may use up to 6% rebar, partly because the rebar carries both tension and axial forces. Constitution D J LeeCBE BScTech DIC FEng FIStructE FICE Chairman, (until April 1995) (previously G Maunsell & Partners) R S Narayanan BE(Hons) MSc DIC FEng FIStructE Chairman, (from May 1995) (S B Tietz & Partners) ProfessorAWBeebyBSc(Eng) PhD CEng MIStructE MICE (University of Leeds) PG CobbCEng MICE (Sir Robert McAlpine & Sons Ltd). It is full. A geotech friend called with a question about a steel gable-frame building that had suffered significant distress. For example, a concrete beam will deflect immediately under its working load, so a concrete floor slab will deflect under its own weight and the weight of the furniture and people setting on it. Each bridge is formed by steel girders acting compositely with a reinforced concrete deck slab. Full slab visual appearance examples. How to use slab in a sentence. 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. Chart use for design is presented in a nice step by step manner. The slab thickness is to be designed as 150 mm. 2), Fatigue (5. 6 Anchorages and laps 6. Table 3 presents the external loads. This design should always be used unless approval to use a thinner deck is obtained from the State Bridge Engineer. 1—Introduction. The reinforced concrete slab design assistant allows the user to quickly generate the design strips of a concrete slab. One and Two Way Slab Quantity. 60 (non-segmental brg. 6 Hollow Blocks and Formers 30. Design of Two-Way Floor Slab System 2. 1-Go to slab thickness and define your slab similar to this picture. For example, i n slab-column system, which is located in dr y or constantl y wet environment (XC1 by EC2), made of concrete C 40/50 and with require ment for R EI120, and with unbounded BBR's 20mm. His analysis suggested that the current slab design (1914) underestimated the moments by 30 to 50%. Orthogonal, non-orthogonal, multi-segment, and varying width design strips are all supported supported by SAFE. Continuous Beam/Slab Design. The design of retaining walls may become time-consuming, since the calculations involve multiple load types and combinations, fixity conditions, and the application of the Code provisions to design the reinforcement. Contemporary house plans, on the other hand, blend a mixture of whatever architecture is trendy in the here and now (which may or may not include modern architecture). Objective: Design the concrete slab and calculate the required tensile reinforcement for the main and the secondary direction. 0 deg Base material details Moist density mb = 18. Minimum depth of the one-way concrete slab, most of the times is governed by deflection criteria. Design of reinforced concrete transfer floors, although routinely performed by structural design engineers, is a very challenging task. The special foundation constructions as the foundation in the weak soil must be executed according. The result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete. 2 deg Angle of wall friction = 0. One way slab being supported on two opposite sides only leads to the structural action in single direction. Flat slabs 13. 8 kN, f c ’ = 20. 8 Modulus of rupture 0. Best Concrete Design EXCEL Spreadsheet Slab Design; Grid Floor Analysis & Design Read about the concepts and solved examples here. sition in the slab. Minimum Depth of 2-Way Slab for Deflection Control. 3—Design example: Equivalent tensile stress design Appendix 5—Examples using shrinkage-compensating concrete, p. Combined direct and bending stresses 15. Chapter 18 - Concrete Slab Structures January 2019 18-8 18. For 1m slab width, • Moment, Shear Force, One-way Continuous slab • For continuous slab, moment and shear force can be obtained from Table 3. Introduction 4 1. They are projections from wall face of lintel beams or floor slabs. Most beams, for example, use about 1% rebar for carrying the tension forces in bending. DESIGN EXAMPLES 1. Any section along the moment slab should not fail in shear, bending, or torsion when the barrier is subjected to the design impact load. 5m of waffle slab, and is to support an imposed load of 5 kN/m 2, design an interior panel of the waffle slab, and a supporting beam. This publication presents worked examples of the detailed design of two composite highway bridges. of such slabs run parallel to the span. Design solution. This problem is. In this example, with the sub-grade comprising a consistent medium dense sand, a design span of 0. 18 gage composite deck, and 4½ in. Introduction Reinforced concrete slabs are a feature of many modern buildings and bridges. The diagram to the right shows and example of a slab on grade that is structurally and thermally isolated. With a 12’ deck span, the beam may be either two 2x8s or two 2x10s, depending on wood used. 2 deg Angle of wall friction = 0. Punching, unbuttoning and perforation 11. allowing water to pond against the slab/footing, or keeping the soil adjacent to the slab/footing wet. ACI 318-11 Crack Width Calculations For Slab. and divide the moment consider from the map by spacing between the ribs then Design it for top and bottom moment As T Section. The structural capacity of the barrier and concrete moment slab shall be designed using impulse Traffic Loads (TL-3, TL-4, TL-5) in accordance with Sections 5 and 13 of AASHTO LRFD Bridge Design Specifications. In 1902, Maillart has successfully developed dimensioning procedure to design a flat. You can lay slabs for paving hard surfaces on sidewalks, entrances, patios and more. 10 SI Equations and Example Problem, 476. The design procedure set forth in that publication had at that time been in use by the author for about 15 years. Soil Design Parameters Edge Moisture Variation Distance. 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. Concrete Deck Slabs on Adjacent-Framed Beams (Slab Beams and Box Beams) ♦ Materials. Foundation Design Generalized Design Steps Design of foundations with variable conditions and variable types of foundation structures will be different, but there are steps that are typical to every design, including: 1. Bending will take place in the two directions in a dish-like form. a) Based on structural design. Slab Reinforcement. 2—Example selecting the optimum amount of reinforcement to maximize the compressive. Slabs are usually used in floor and roof construction. Thick concrete slabs are more favorable for upper steel structure. 8 ksi 28-day strength, f¢ c = 6 ksi Deck slab: 4. Where interior stud wall loads are to be carried by the floor slab, the slab section shall be thickened to 12-inches and founded directly on the undisturbed sub-grade. Only the design of Slab Bridge will be used for illustration. 2 3 Span with Link Slabs. A typical example may be a precast T-beam. 6 Escalators for Footbridge at LRT/Road Junction of Lung Mun Road and Tuen Tsing Lane Highways Department WORKED EXAMPLE NO. 1 Robert Maillart’s Contribution. EMPIRICAL DECK DESIGN [S9. ACI 318-11 Crack Width Calculations For Slab. 17 ¥ B Ö′ where f’c is the specified compressive strength in psi (MPa), ρ is the reinforcement ratio, and d is the effective depth. Find out more. The girders may however need to perform the secondary function of preventing the slab from buckling in compression. 1 Effect of depth on Strength 4 3. “ Slab helps us onboard new reps faster and keep our processes streamlined. In 1902, Maillart has successfully developed dimensioning procedure to design a flat. a) Based on structural design. 10 Design method from patch loads using design charts. It doesn’t matter what I say here on this blog or anywhere else for that matter when it comes to one-on-one design with a client, 9 times out of 10, they have a hard time jumping on board with a new idea. Design examples The following design examples for two d i f ferent joint spacings illustrate how to select reinforcing steel for controlling cracks caused by shrinkage and tempera-ture effects. However, a slab with length/ breadth ratio of not less than 1. The content of this article will be updated accordingly. 1990 Reinforced concrete: design theory and examples, E FN Spon. A typical example may be a precast T-beam. Building systems/frame Building structure Concrete building systems/frame Publisher History. 2 Basis of design: loadings 12. Round slab thickness up to the nearest ¼”. 45” • Side note: old geometry. The analysis and design follow the equivalent frame analysis method of the ACI code, which considers a one-bay wide strip of the floor system as a continuous frame. Anderson, a leading consultant on the subject of reinforced concrete slabs-on-ground. The first stage of the design is finding the bending moment of the slab panels. Cantilever slab is always one-way. Slab design in STAAD Foundation Advanced has three distinct parts. The floor consists of six panels at each direction, with a panel size 24 ft x 20 ft. And an overly thick slab will cost more than it needs to and be more difficult to put in. Asked in Building and Carpentry , Concrete. Loading – Single lane of Class 70-R or two lanes of Class A:. 1 Worked example A simply supported beam has an effective span of 9 m and supports loads as shown. spSlab software manual (Eq. 2 m Beam width, b = 0. Footing: 31,536 lbs. Updating your home's landscaping is a great way to increase the value of your property and create outdoor spaces for relaxing and entertaining. Cross-sections can include a combination of rectangular, I, T and L-sections, and spans can have constant or tapered sections. 3); and, for the same footing, verification of the serviceability limit state (Example 10. The bridge deck will have no footpaths. It is full. tool for the analysis and design of concrete slabs. The deck span is 7. Post-Tensioned Concrete Slab Design Manual. The structural capacity of the barrier and concrete moment slab shall be designed using impulse Traffic Loads (TL-3, TL-4, TL-5) in accordance with Sections 5 and 13 of AASHTO LRFD Bridge Design Specifications. DESIGN EXAMPLES 1. 00 m, amsl HWM = 1643. Determine the slab reinforcement. Effective Span of Slab3 2. Adopt M-20 concrete & Fe-415 steel. EXAMPLE PROBLEM: Design the form for a roof of a concrete structure which is 6 inches thick by 20 feet wide by 30 feet in length. The deck may consist of 3 girders spaced at 2, 45 m. "Expect to pay around $2 per square foot,” said J. Voided Slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications. 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. Saros is a free slab serif font which you can download right away and use in both web and print projects. Super Slabs Gauteng is one of South Africa’s largest slab suppliers. 10 Design method from patch loads using design charts. 3 Prestressed Flat Slabs and Plates Prestressed flat slabs and plates have been developed mainly in Australia and the USA over the last 30 years. Reinforced Concrete Design to BS8110 Structural Design 1 - Lesson 5 5 4. road slab (rectangular and with sides parallel to the sides of the road slab). The tire foot print is 4" x 4" and the wheels and axles are spaced 48 in. Example CVEG 4303: Reinforced Concrete I One-Way Slabs A 5" thick concrete slab is reinforced for tension with #4 bars spaced at 7". Slab is one of the most famous part of a construction project. slab, the design of post-tensioned slab is done by two methods, this example illustrates the design of a two span cast-in-place post-tensioned the minimum top slab thickness shall be as shown in the lrfd bridge design. Don't Jump the Gun on Pouring the Slab! It is tragic how many times people make the costly blunder of pouring their metal building foundation too soon. Find out more. contact area = 70. Continuous Beam/Slab Design. DESIGN EXAMPLE 1 This example illustrates the design of an interior and exterior beam of a precast prestressed concrete beam bridge using fully prestressed beams with harped bonded strands in accordance with the AASHTO LRFD Bridge Design Specifications, Third Edition, Customary US Units and through the 2005 Interims. 0 3 Panel Features and Benefits 1. Post-Tensioned Concrete Slab Design Manual. 86 kN/m2 and a live = 10 kN/m2. The following example illustrates the design methods presented in ACI 318-05 and IBC 2003. Horizontal members of this frame are called beams, and vertical members are called columns. Unless otherwise noted, all referenced table, figure, and equation numbers are from these books. beams of size 225 x 500 mm spaced at 4. ClearCalcs has calculations for a wide range of materials including wood, steel, concrete, and cold-formed steel 1-way RC Slab Design (AS 3600:2018) 2-way RC Slab. The web thickness at 5 ft (1. The overall depth of the slab without finishing materials is 300mm. Design comparisons and examples will be presented to demonstrate these concepts and the application of the PTI Design method. The footing slab must resist bending, one-way shear and two-way. We ensure the most suitable and economical precast design to suit. Design of T-and L-beams. ACI 360, "Design of Slabs-on-Grade", refers to this as a Type B slab. (165 mm) (1). Each bridge is formed by steel girders acting compositely with a reinforced concrete deck slab. Reinforced concrete structures II – Ribbed slab Example 2 1 Example 2. 5m of waffle slab, and is to support an imposed load of 5 kN/m 2, design an interior panel of the waffle slab, and a supporting beam. 56 - Roadway grade dictates elevation of superstructure and not minimum free board. beam design = A s /bd = balanced reinforcement ratio in concrete beam design = shear strength in concrete design Reinforced Concrete Design Structural design standards for reinforced concrete are established by the Building Code and Commentary (ACI 318-11) published by the American Concrete Institute International, and uses. 1 Types of concrete slab construction5 Flat slab6 Slabs supported on beams7 Ribbed and Coffered slabs8 Ribbed with deep beam Ribbed with wide beam 9 1. Thus, research on skew slab-and-girder bridges with the goal of developing design criteria that include the effects of skew is desirable. Sog_project_example_11 030206 MNL 424 STRUCTURAL CALCULATION FOR THE POST-TENSIONED SLAB-ON-GROUND OF SUNSHINE PROJECT California March 2006 Reference: SOG USER MANUAL, ADAPT Corp. In this example, the calculating value of the effective depth d v is equal to the effective depth d minus the concrete cover c on the bottom surface of the slab: , 204 30 174 vout. DESIGN OF SLABS-ON-GROUND 360R-3 A4. The shaded slab will be cast first and the remainder will be poured after some time. This PDF file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. 1 Prestress Level 2 2. There are two or more spans. Voided Slabs generally span 30' - 90'. In 1914 Nichols used statics to compute the total moment in a slab panel. Manual for Design and Detailing of Reinforced Concrete to September 2013 the Code of Practice for Structural Use of Concrete 2013 Contents 1. Normally the entire building, 10 to 15 levels, is carried by a transfer slabs. After sometime later, requirements for the flat slab design theory were established. Flat slab system is an important division of concrete floor system. and Choo, B. In this example, the calculating value of the effective depth d v is equal to the effective depth d minus the concrete cover c on the bottom surface of the slab: , 204 30 174 vout. The design of composite slabs and beams is discussed in detail in relation to the Eurocodes and BS 5950. Well, I found an example of an idea I’ve been trying to sell some of my clients who have had a hard time believing this is a thing. Determine the slab reinforcement. For example, when a double subduction system fails to initiate, the majority of the work is done by the right slab and DSF ∼0. Adopt M-20 concrete & Fe-415 steel. span length. Design of Reinforced Concrete Slabs 107 B = 1. Building systems/frame Building structure Concrete building systems/frame Publisher History. Background information on design theories is followed by discussion of the types of slabs, soil-support systems, loadings, and jo. Two-way slabs carry load in two directions. This example taken from Example 8 on page 71 of ACI 355. The Sub-Committee first published “Design Recommendation for Storage Tanks and Their Supports” in 1984, and amended it in the 1990, 1996 and 2010 publications. 4 Design of Two-way Slabs Example 1. Raft Foundation Design for a Typical 2 Storey House Example (BS8110 : PART 1 : 1997) Job Ref. Take the case of a warehouse with a 6-inch-thick, 2,500-psi concrete slab on 2 inches of EPS insulation with a rated stiffness of 360 psi for one inch. Practical Design to Eurocode 2 23/11/16 Lecture 10: Foundations 14 Pad foundation Worked example Worked Example Design a square pad footing for a 350 × 350 mm column carrying Gk = 600 kNand Qk = 505 kN. 4 kN (tension), V u =17. This is also called the "RC Designer" mode. 65 given below: Fig. They are cast in place as one single component, including a thickened perimeter that serves as a footing. The punching shear design according to EN 1992-1-1 checks that the acting shear force v Ed does not exceed the resistance v Rd. This tutorial shows how to configure a spreadsheet with the purpose of design the spacing of joists, stringers and shores for a concrete slab form. 3 Note: where b effective width of compression flange bw average width of web Use actual b if it is less than the calculated b using the above formulae. There are five design procedures with examples developed by Mr. and Design of Residential Slabs-on-Ground, BRAB Report #33. Deﬂ ection calculations 59. DESIGN OF SLABS-ON-GROUND 360R-3 A4. Example: 600 mm thick slab, loading at 30 days, C30/37 - ϕ= 1,8 h 0 = 2A c /u where A c is the cross-section area and u is perimeter of the member in contact with the atmosphere. the design of the foundation is performed by a licensed engineer. A finite element model may be created to analyse a complicated loading arrangement. Design detail for example C28 INTRODUCTION. Alternately, slabs like Clarendon feature thicker stroke widths in the stresses of the Cs and the bowls of the Bs, making them better for headlines.