Design of reinforced concrete structures ii twoway slabs 1 1. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. Determine the loads based on the buildings parameters section d. Calculation example frame analysis uniform load calculation example find the center of gravity surface calculation example design bolted connection of tension plates ec3 calculation example cantilever beam, temperature change calculation example undamped free vibration part a. Bridge approach slab analysis and design incorporating elastic soil support presented by. To make the slab design independent of the type of rail, we will place the wheel load 1 from the nominal face of the rail 1ft from the edge of the slab. Powered by a sophisticated fem solver increasing capacity and substantially speeding up solution for large and complex models, spmats v8. Mccabe1 the enclosed example is presented to demonstrate the intent and use of the aisi tentative recommendations for the design of composite steel deck slabs, and hereafter will be referred to as the criteria. Plan view of floor system assume partitions will not be damaged by deflections. Design of concrete structures 14th edition, 2009, by arthur h. A typical example of the decking layout for a composite floor is shown in. Lrfd castinplace cip slab span design example county. Reinforced concrete slab design and detailing guide is456. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design.
Notes author staff bridgesight software sponsor bridgesight software. Worked example 2 design of concrete cantilever retaining. The slab is supported on beams of size 225 x 500 mm spaced at 4. Example design a cantilever projecting out from a room slab extending. Use i wsd, ii usd to design the twoway slab shown below, carrying floor finish 30 psf, random wall 50 psf and live load 60 psf given.
This design example was not intended to follow the design and detailing practices of any particular agency. Structural design of cantilever slabs solved example. Posttensioned concrete design spreadsheet program a pdh. These include functions to determine c d and resistance values for flexure. Design of cantilever slab spreadsheet engineering books. Design of the composite flooring slab with profiled sheets t153 ruukki for a residential building, 35 pages, 1 appendix saimaa university of applied sciences, lappeenranta technology, civil and construction engineering civil and construction engineering bachelouv theviv 201. In addition to general ultimate and serviceability limit state design issues, practical design considerations such as the formation of holes in the slab, support details, fire protection, and attachments to the slab are discussed. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. N c,f 0,85 f cd b h c reduced plastic moment resistance of the sheeting. For designs, quasistatic and dynamic regimes are combined to form one regime and impulsive. Aashto lrfd has since become the design standard and uses impact loads significantly larger than those in asd. The decking should not cantilever beyond a support more than 600 mm or.
Reinforced concrete design 1 design of slab examples and. 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. Hello in this video cantilever slab is design as per is. Design of cantilever slab spreadsheet download link. The execution of the design will be explained with reference to an example. Cantilever slab supported on a reinforced concrete beam with top and bottom reinforcement as well as middle torsion reinforcement.
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. Cantilever slabs are common features in buildings due to the need to have bigger spaces at upper floors. Design example 1 cantilevered overhead sign support. Slab cantilever reinforcement design spreadsheet download link more from my sitevoided twoway slab design based on aci 31814 spreadsheetconcrete toggle navigation about us.
Cantilever retaining wall ouestion for the retaining wall and the profile shown below, calculate. Bss090119991 abstract this design example illustrates the empirical design method for composite concrete bridge decks specified in article 9. Cantilever retaining wall sheet excel civil engineering. The cantilever retaining wall shown below is backfilled with granular material having a unit weight. Design of cantilever slab spreadsheet download link more from my sitevoided twoway slab design based on aci 31814 spreadsheetdeck toggle navigation. Regarding the cantilever slab design i will get on to that later. Pdf design envelopes for cantilever slabs to resist blast loads.
This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems. Element designs with notes and discussions have added to get comprehensive knowledge. Department of mechanics, materials and structures english. In this post, we are going to show how we can analyse and design cantilever slabs subjected to floor. Manual for design and detailing of reinforced concrete to the code. For simply supported beam, continuous beam and cantilever, the effective. Design example 1 cantilevered overhead sign support truss with post.
An example would be a case in which a large portion of the. Reinforced concrete constant width cantilever slab detail. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in. Appendix i aashto lrfd format design guideline design of. Manual for design and detailings of reinforced concrete to code of practice for structural use of concrete 2004. Pdf blast resistant structural designs are becoming essential because of the. Design of slab examples and tutorials by sharifah maszura syed mohsin example 2.
All load combinations were entered into the model, and the combined load effects were. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Reinforced concrete design 1 design of slab examples. Assume partitions cannot be damaged by deflections. Design technique and philosophy design was conducted according to asce705 and the aisc steel manual th edition.
A subsequent report established the feasibility of using posttensioning in slab onground construction and verified many of the brab assumptions. Assuming that the allowable bearing pressure of the soil is 120 knm. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. Using aashto lrfd bridge design specifications 4th ed. Design example on composite steel deck floor slabs by thomas j. This report is intended to serve as a manual of good practice for the design of prestressed concrete flat slabs in addition to the recommended procedures, other methods are described for the sake of completeness and to compare different methods of design. Introduction concrete slabs on grade are a very common type of concrete construction. The major revisions in relation to design and detailing of reinforced concrete structures are.
The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member. Comprehensive design example for prestressed concrete. Comprehensive design example for prestressed concrete psc girder superstructure bridge design step 7 design of substructure design step 7. Composite slab worked example 1 made by sssr date 140500 structural steel design project calculation sheet checked by pu date 080800 check the adequacy of the continuous composite profiled deck slab with spans of 3. Oneway and twoway slabs oneway slabs transfer the imposed. Reinforced concrete slab design using the empirical method. Reinforced concrete, 2014, 9th edition, aci 31811 code edition, by jack c. Pdf design envelopes for cantilever slabs to resist. A detailed explanation will be given of the checksto be carried out, the aspects to be considered in the design and the construction procedures and sequences of a posttensioned slab. A subsequent report established the feasibility of using posttensioning in slabonground construction and verified many of the brab assumptions. Apr 4, 2012 this is a typical reinforced concrete cantilever slab reinforcement detail with a constant slab width. Only the design of slab bridge will be used for illustration. This spread sheets is useful for design of cantilever slab as per is 456.
Analysis and design of cantilever slab free download as word doc. Slabs and flat slabs lecture 5 19 th october 2016 contents lecture 5 designing for shear in slabs including punching shear detailing solid slabs flat slab design includes flexure worked example exercise punching shear. The construction and design of concrete slabs on grade d. Nagy 1 and istvan szatmari 2 technical university of budapest, department of steel structures h1521 budapest summary there is an enhanced intention imposed on building construction industry to improve time and structural efficiency of structures. Analysis and design of cantilever slab beam structure. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is useful for practical purposes.
Continuous one way slab figure 1 shows a clear area of 12 m x 8. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Title reinforced concrete slab design using the empirical method publication no. Bending will take place in the two directions in a dishlike fo. Manual for design and detailings of reinforced concrete to. Get this cad detailed drawing of a reinforced concrete cantilever veranda slab with a parapet wall detail in dwg, dxf and pdf formats, use it in your projects and save yourself valuable time. The building is located in seismic zone iii on a site with medium soil. It was thrill walking on it as each step would swing little under weight.
File example 11 castinplace concrete cantilever retaining wall. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Refer to document knukdescds1890003 rev 04 for conceptual design statement. Structural steel composite slab 1 of 7 rev design project. Cantilever concrete retaining walls are commonly used for residential purposes, often as integral basement walls.
Aug 28, 2016 cantilever slabs are a typical one way slabs. Design compressive normal force in the concrete flange. 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. The slab is designed in category a see eurocode 2, part 2, table. In this post, we are going to show how we can analyse and design cantilever slabs subjected to floor load and block work load. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. A copy of the tables is provided in the appendix and also. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. The composite slab which has to be placed on a conference hall has been selected for this project. Comprehensive design example for prestressed concrete psc. Design envelopes for cantilever slabs were developed using kingery and. To achieve this, architects normally extend the slab beyond the ground floor building line, thereby forming a cantilever.
Refer to page r 2 for the location of the roof area to be designed. Design strap as flexural member for the shear and moment obtained above. Department of mechanics, materials and structures english courses. Rail anchor slab design rail anchor slabs have been used with good performance under allowable strength design asd practices. This guide covers the design and construction of composite slabs and beams, and. In particular, see the chapter on postcracking stiffness, p. This method has been used extensively since 1963 for slabs. Examples c1 through c5 are a set of examples that illustrate the elevation of a singlestory home with a crawlspace. Even while designing they are considered as one slabs with cantilever fixed or continuous at supports. The following worked example is for a freestanding cantilever. Cantilever slab design part1 by parag kamlakar pal. Reinforced concrete slab design and detailing guidelines for depth of slab, loads on slab, reinforcement guide for oneway and twoway slabs as per is following are the rcc slab design and detailing guidelines. The lrfd impact loads result in a rail anchor slab that is much larger than what has proven. Full beam design example cee 3150 reinforced concrete design fall 2003 design the.
The trial depth is selected based on spandepth ratio of 7, as in is. Ce 433, fall 2006 slab design example 1 6 design a oneway slab for an exterior bay of a multistory office building using the information specified below. Solved example a cantilever slab 200 mm thick is 1. Design of one way and two way slabs, design of staircases. Example analysis using data from the portland cement association engineering bulletin 232, aashto lrfd design of castinplace concrete bridges this example demonstrates how slab bridge designer 2. Appendix a examples colorado department of transportation. Structural loads, structural analysis and structural design are simply explained with the worked example for easiness of understanding. Ce 437537, spring 2011 retaining wall design example 3 8 3. Asce, secb course content slab on grades construction. Design of strap or cantilever footings falmatasaba. Pretty easy, we used to have the same stair case in my home in india. All load combinations were entered into the model, and the combined load effects were compared to the reduced nominal strengths of the members.
The safety factor against sliding minimum required f. Integral abutments are used to eliminate expansion joints at the end of a bridge. A six storey building for a commercial complex has plan dimensions as shown in figure 1. The stem is a vertical cantilever beam, acted on by the horizontal earth pressure. In the temporary condition no water will be taken into account. Design of cantilever slab civil engineering youtube. Pdf cantilever slab design ramjan shehzaad academia. Run a beam diagonally along a side and then design a step as cantilever and anchor. Structural design of highrise buildings erik hallebrand and wilhelm jakobsson structural design of. In 1965 the writer developed a complete, overall design system, later modified to conform, in format. Usually the cantilever wall stem is of concrete block construction rising from an insitu concrete foundation. Lrfd design examples federal highway administration.
The preparation of this document was funded and commissioned by the metal. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020. Retaining wall design temporary condition the following calculations will consider the worst case. One way slab design procedure with example design of one. The design of composite slabs and beams is discussed in detail in relation to the eurocodes and bs 5950. In this project, the design of composite slab and connection with the beam using shear connectors have been done using insdag design manual based on assumptions of eurocode4 and is. Design of replacenent upper roof introduction as part of the works at south kensington station asset stabilization program there is a requirement for a design of replacement upper roof. Manual for design of slabs, pile caps and footings. This appendix presents design examples of the retrofitting techniques for elevation, dry floodproofing, wet. How to design a cantilevered, slabless, waistless rcc. Deck is 46 ft wide with a 15 degree skew roadway is 44 ft wide. The construction and design of concrete slabs on grade.
Total moment in slabs supported on circular column capitals 0 moments at design sections of slabs supported on. This design should always be used unless approval to use a thinner deck is obtained from the state bridge engineer. Example calculations for this and all other example problems the following data from the canam united steel deck design manual and catalog of steel deck products will be used and are worked using lrfd methodology. Slabs are usually used in floor and roof construction. Flat plate concrete floor system does not use beams between columns or. Sci p300, composite slabs and beams using steel decking. Design of reinforced concrete structures ii twoway slabs.
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