Slabs may be supported on two sides only or have beams on all four sides. Jan 05, 20 in highload traffic environments, concrete topping slabs must be designed to compensate for the nonrigid substrate. Best practices of concrete pavement transition design and. The required standard plans for bridge construction for projects are included in the structures component of the contract plan set. First, lines joining adjacent column or wall supports. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. The numbering system relates to specification masterformat 2004. Step 1 consult your project plans to determine the spacing of the rebar that was placed in the first slab and the spacing of the rebar that is to be placed in the second slab. Reinforced concrete slab design using the empirical method bridgesight solutions for the aashto lrfd bridge design specifications bridgesight software tm creators of effective and reliable solutions for the worlds bridge engineers 2688 venado way rescue, ca 95672 phone. The thickness of a floor slab must be determined early in design because the weight of the slab is an important part of the dead load of the structure. Flat plate concrete floor system does not use beams between columns or. Foreword the reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. Over the years, these four categories have been merged and updated, giving rise to many hybrid. Va standard details div 00 architectural all details.
Reinforcement detailing of a slab is done based on its support conditions. Pdf composite slab systems were first developed in the late 1930s for use in tall. By creating a localised thicker section of slab around the column head, the need for shear reinforcement is negated. Posttensioned slab column connection whe report 68, serbia and montenegro poured on the ground in forms, one on top of the other, as shown in figure 11. Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1.
The sand aggregate mixed to form the epoxy mortar provides a heat sink for heat generated and it provides increased modulus of elasticity. Reinforcement detailing of reinforced concrete slabs. Accordingly, main reinforcement is required in the two directions. It is a horizontal structural component, with top and bottom surfaces parallel or near so. Flat slab analysis, design and detailing pdf civil. Concrete slab, a very common and important structural element, are constructed to provide flat, useful surfaces. Modern concrete construction manual by detail issuu. The unique properties of the steel deck combining high rigidity and. Splitslab waterproofing in highload traffic environments. Simply stated, 2 50 mm of insulation serves the same function as 4 1,200 mm of. These instruments have been used for many years in europe and are becoming more popular in the united states. Concrete is good in taking compression and steel is good in tension. Chapter 18 concrete slab structures january 2019 183 18. Twoway joist concrete slab floor waffle slab system.
Filler slab technology is a simple and a very innovative technology for a slab construction. Autocad structural detailing software, built on the familiar autocad platform, helps structural engineers, detailers, and fabricators to create more precise detailing and fabrication shop drawings. Coreslab binder comp 2 op precast concrete building. Tips for pouring a concrete slab most concrete cracks can be minimized if the base is well prepared reinforce slabs with weldedwire fabric during layout, i cut the fabric about 6 in. Guide to concrete floor and slab construction, aci 302. Reinforced concrete slab is the most popular floor slab system used in residential building construction in sri lanka. First model a flat slab for the entire area, then model the drop panels as separate slabs from the bottom of the flat slab. Mar 31, 2016 swirnow structures offers the best cost on hambro d500 structural floor systems, hambro joists, and structural floor joist systems. Causes, prevention, repair, is177, portland cement association, skokie, il 4. Twoway concrete floor slab with beams design and detailing design the slab system shown in figure 1 for an intermediate floor where the story height 12 ft, column crosssectional dimensions 18 in. Disclaimer please read this guide and the supplied sealer instructions in their entirety prior to receiving your slabs and contact your merge rep if you should have any questions. Jul 17, 2017 while it sounds complicated, the proces to join two concrete slabs is easy but might take a few attempts to get it right. Reported by committee 302 american concrete institute.
Manual for design and detailing of reinforced concrete to. Concrete curb on existing slabtypical cad files, dwg files. Find the following parameters for design moments in step 2 per unit width step 4 note. This reduces the chance of exposing the wire at the edges and allows. Design the steel beams using software, or by simple manual calculation. 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. Frame opening with new wsection beam and l152x102x6. The first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci. Nov 28, 2014 the new slab will be poured over an existing interior concrete floor, so in this case, being an interior slab, the new slab will be of the same thickness in its entirely. Concrete curb on existing slabtypical planmarketplace, your source for quality cad files, plans, and details.
Concrete topping slab is an overlay designed to provide a dense, abrasionresistant, and a finished floor surface for multiple purposes such as providing a wearing course to support traffic loads in parking facilities and bus terminals, providing a level surface for interior floors, providing special base for electrical and mechanical equipment. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Lee at al 10 also studied about deflection of reinforced concrete half slab. Autocad file types open best by rightclicking on the link and doing a save target as and saving to your computer or network before opening. What should i know about installing slabs on grade. Expansion joints in the steel curb facing and concrete backing shallbe at a maximum spacing of 24 feet. Specifically, a concrete slab on grade may be subjected to concentrated post or wheel loading. Technical thestructuralengineer 35 technical guidance note. Drawing on the authors experience, this article presents a topping slab design method for waterproofing installations proven successful in highload traffic environments. 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. Particular features of the construction the concrete slab must be designed and constructed according to the requirements for concrete with a high resistance to water penetration as outlined in din.
Design of reinforced concrete structures ii twoway slabs 1 1. Anchoring of link slab the portion of the link slab beyond the unbonded length is used to anchor it into the concrete deck slab. The backfill material itself also significantly affects water drainage around the wall. Concrete supplier name and contact details concrete installer name and contact details this enables us to have the right products on hand and communicate with others involved in the flooring in a timely and. Structural concrete structures reinforced concrete construction. Traditional slab ongrade designs have employed frost walls around the building perimeter. Design of slab for flexure 067 m unit width of slab. Flat slab haunched slab a longitudinal slab is one of the least complex types of bridge superstructures. Grdslab concrete slab on grade analysis spreadsheet.
Drainage pipes may also be placed beneath the slab and connected to a sump. Crosswalk of design standards index to standard plans. Then for the given parameters, the slab flexural, bearing, and shear stresses are checked, the estimated crack width is determined, the. For slab repairs the maximum depth shall be mid depth of the slab. Reinforced concrete slab optimization with simulated. The size, spacing, and type should match that of the adjacent concrete deck.
Va standard details were updated in early 2009, div 22 and div 26 in early 2014, and the steam portion of div 23 in late 2017. Standard civil drawings autocad file types open best by rightclicking on the link and doing a save target as and saving to your computer or network before opening. Bending will take place in the two directions in a dishlike form. The manual and advisory safety code of practice for concrete pumping 67. Monolithic foundation detail us 100 third street castle rock, colorado 80104 303. Comparison of oneway and twoway slab behavior economic choices oneway slab on beams suitable span 3 to 6m with ll 35knm2. Slab supported on two sides and bending takes place predominantly in one direction only is called one way slab. Each detail is available in pdf and autocad dwg formats, go to our secure ftp site for the dwg format drawings. Most foundations, slabs, and walls consolidated by hand methods have a slump between 4 and 6 inches. Precast reinforced concrete wheel stop details pdf.
Concrete slabs on grade are a very common type of concrete construction. Reinforced concrete cantilever slabs expansion joint detail. Timberconcrete composite structures are one alternative to common slab systems, since the advantages of. The design of composite slabs and beams is discussed in detail in relation to the eurocodes and bs 5950.
For slabs spanning in both directions published tables and charts should be used to find bending moment and shear per unit width of slab. A flat plate system will be considered first to illustrate the impact longer spans and heavier applied loads. Shear strength of beamless slabs usually a controlling factor. Can be used for larger spans with relatively higher cost and higher deflections oneway joist system suitable span 6 to 9m with ll 46knm2. While it sounds complicated, the proces to join two concrete slabs is easy but might take a few attempts to get it right. Concrete floors are too much work to do a second time.
This guide covers the design and construction of composite slabs and beams, and. Flat slab system is an important division of concrete floor system. The standard plans for bridge construction shown on this site are for designers to use in preparing contract plans only and are not for direct use by the contractor. Slab supported directly by columns are called flat slab. Experimental study of two way half slab precast using. The effect of various surface treatments, using zinc and magnesium fluosilicate crystals on abrasion resistance of concrete surfaces, concrete laboratory report no. These materials are originally located at different websites. A civil engineer must know all the aspects regarding the flat floor system. Joining two slabs, help control joints should be 23 times no bigger the thickness of the slab, in feet, in this case, a 5 slab should have them at no more than 15. Generally, there are two types of slab which are one way and two way slabs. New concrete slab over existing slabs autodesk community. One hundred twenty major categories of fully editable and scalable drawings and details in autocad format. The many specific details of forming, placing, finishing, and curing a concrete slab are not included here.
Uhpc link slab design uhpc workshop june 28th, 2017 jim scarlata, p. Design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf. Pdf composite floor slab design and construction researchgate. Placed over a 2 4 base of compacted stonestonedust medium broom finish for slabs over 25 x 25 slightly heavier mediumbroom finish for smaller slabs to minimize tile migration sloped 1 for every 10. Posttensioned concrete slabs augi the worlds largest. Cad dwg detail drawing with a detail of an expansion joint between 2 adjacent cantilever slabs. Design of timberconcrete composite structures cost actions. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. It is a method in accordance with aci 360 design of slabs onground. A durable concrete mix design must be a minimum 4000 psi at 28 days.
Two way slab design by direct design method as per aci 31811. Grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade. Design of reinforced concrete structures ii twoway slabs. Longitudinal steel should be detailed in a 2bar alternating pattern, with one of the bars continuous through the slab. The minimum spacing of reinforcing bars should preferably be 6 in. The minimum thickness can be determined by many factors. Basketball slab specifications 4 slab of 3500 psi concrete. However, no matter how basic or complex the floor is, the construction method is similar and includes. Structural modeling and analysis of concrete floor slabs. In some cases, pipes are cast in or placed on top of concrete footings at 6 to 8 ft 1. This publication presents best practice for the design of steel construction technologies used in. The reason why, concrete and steel are used together to construct rcc slab, is in their individual properties as separate building materials and their individual limitation. Insulated or frostprotected slab ongrade foundations use insulation in place of soil to control heat loss and avoid freezing conditions next to and beneath the slab.
Deep ribs, the concrete and steel quantities are relative low expensive formwork expected. The depth of a concrete slab floor is very small compared to its span. For most large pt slabs, we also have to model the drop panels at the column supports. Twoway flat plate concrete floor system analysis and design. A guide to slab edge insulation install that meets the. It is also reported that epoxy is a combustible material. The load transfer mechanism at the concrete to the concrete interface is determined by several factors, such as cohesion behavior, friction coefficient, and dowel action. The lateral loads are independently resisted by shear walls. Uhpc link slab design new york state department of. Hambro d500 structural floor system, hambro joist concrete. According to builders plaque, this structure was built by cecil county in 1931. Concrete repair technical drawing concrete repair patch edge treatment dxf technical drawing concrete repair patch edge treatment.
Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Typical installation details technical drawing typical layout for slab and slab edge repair. Slump is measured in accordance with astm c143 by inverting a standard 12inchhigh metal cone, filling it with concrete, and then removing the cone. Two way slab design by direct design method as per aci 31811, step by step procedure and limitations of direct design method for two way slab is presented. Thus the mortar is not a stiff material for replacing reinforced concrete. The oneway slab is deflected in one way direction and primary reinforcement is placed in one direction whereas. Ce2007 lombard road in cecil county 1931 concrete slab with solid parapet rail. The construction and design of concrete slabs on grade. Indicate component details, materials, finishes, connections, and joining. All of merge designs extremeconcrete materials converts recycled waste stream materials into beautiful, distinctive and never duplicated concrete essentials. Full learn to read structural drawing course at the cheapest rate. The batch report which includes all mix details such as additives, oxides, aggregates, mpa, etc. Slab may be supported on walls or beams or columns.
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