Ram concept is a software application for the structural analysis and design of conventionally reinforced and posttensioned concrete floors, mats, and rafts. To avoid getting burned in a dispute over slab tolerances, engineers and contractors need to know how design and construction decisions affect variations in slab dimensions and locations. Elevated concrete slabs are typically used as columnspiles supported floors in multistory buildings or industrial facilities. Tm 580912 concrete floor slabs on grade subjected to. Effects of concrete placing and finishing operations on floor flatness will be discussed in a subsequent a rt i c l e.
Learn the art of woodworking using these stepbystep woodworking plans. Using our vast experience in the engineering and commercial construction industries, were able to select the most appropriate elevated slab or garage floor system design to help curb formwork costs. As ceo of tella firma foundations, a dallasbased construction technology firm, jim fontaine understands that what is beyond the surface of the home is equally as important as what is within it. The contractor is usually responsible for controlling deflections of formwork and. Manual for design and detailing of reinforced concrete to the code. Ce 433, reinforced concrete design summer 20 example slab design 1 2 material properties geometry compressive strength of concrete fc 5,000 psi span length of slab beam spacing l 18 ft center to center coefficient for depth of stress block 1 0. Rooftop swimming pools and spas offer breathtaking views, writes rob holmer, but they also tend to come with an array of unique challenges. My apologies for the relatively banal question, but im drawing a blank. Refer to aci 223 for procedures for the design and construction of shrinkagecompensating concrete slabsonground.
Simplified slab design approach for parking garages with. Superior concrete has completed a variety of elevated slab projects ranging from a 6. Reinforced concrete design 1 design of slab examples. Pdf design and testing elevated steel fibre reinforced self. Elevated slabs superior concrete constructors, inc. Reported by committee 302 american concrete institute. Unlike other 2d diaphragmbased slab design programs, adaptfloor pros true 3d fem. This guide identifies the various classes of floors based on use, construction design details, necessary site preparation, concrete type, and other related materials.
A continuous cycle of placement, measurement, evaluation, and adjustment produces highquality elevated concrete slabs and satisfied owners. Slab steel for tbeams parallel to main slab reinforcement. Formwork design for high elevated slab construction. With high elevated concrete elements, the vertical shoring for the high soffits may raise the share of formwork cost even higher, making it imperative that the formwork design be more rigorously addressed. The best how do i make an elevated concrete patio free download pdf and video. Pdf composite floor slab design and construction researchgate. Prediction of the load carrying capacity of elevated steel. They are used for storing vehicles and goods, and provide maneuvering areas and access for delivery vehicles. The slab has to carry a distributed permanent action of 1. Guide for design and construction of concrete parking lots. Concept includes an integrated design process for posttensioned concrete slabs, including full 3d finiteelement analysis of.
Elevated concrete slab boundary autodesk community. Here, he discusses how knowing the forces at work on elevated concrete shells will help when it comes to getting things just right. The structural design of concrete structures incorporating suspended longspan floor systems needs an appreciation of many factors and for these reasons must. The reinforcement design is calculated based on the design strips which are defined by the support lines. Concrete decks for coastal homes professional deck builder. This guide covers the design and construction of composite slabs and beams, and addresses the. Concretebending flexural design of concrete beams, slabs. The basic concept of its design is to ensure that at service loads, the bending moments and shear. Guide for design and construction of concrete parking lots aci 330r01 concrete parking lots serve many transportation facilities, industrial plants, commercial developments, and multifamily housing projects. The formulae, calculations and tables used in this spreadsheet are based on aci committee 347, formwork for concrete, 6th edition. The elevated slab is typically designed with steel reinforcement and creates the floors and ceilings in a multilevel storey building.
An elevated or suspended concrete slab is most commonly found in multistory heavyuse buildings, such as parking garages or commercial offices. Within a design strip, there are autogenerated design cuts that are slices thru the design strip perpendicular to the support line. Linear fe analysis has become commonly used for the design of rc slabs. Thin slab floor systems for high rise towers by steven m. Have used sketch tools to draw boundary of one floor. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Effects of concentrated loads a slab is a structural member carrying an out of plane external load that causes bending moments. By simplifying slab reinforcement at column locations and eliminating column capitals, stirrup cages, or i beam shear heads, they enable efficient design and rapid. Many factors need to be taken into account when designing an elevated concrete floor, not only to take into account the weight of the floor, but also the. After receiving numerous requests, we are providing an interactive microsoft excel spreadsheet for design of timber formwork systems for elevated concrete slabs. Elevated slabs overview elevated slab design is a feature that is only available in risafloor es as opposed to risafloor.
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 committee 340, design. The process of designing highrise buildings have changed over the past years. Simplified slab design approach for parking garages 309 4. Concrete slabs are often carried directly by columns without the use of beams or girders. Oneway and twoway slabs oneway slabs transfer the imposed. Im planning on designing this to aci 31811 standards, and as a twoway slab. Design and testing elevated steel fibre reinforced selfcompacting concrete slabs. Behaviour of concrete floor slabs at ambient and elevated. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. The developments include the refinement of the assumed inplane stress pattern and a prediction of when concrete crushing occurs in the proximity of the corners of the slab. Because we were already building with concrete for our wall systems, it seemed logical to look for a concrete solution for our porches and decks. The pans are used to support a thin slab of pouredinplace concrete.
Refer to aci 223 for procedures for the design and construction of shrinkagecompensating concrete slabs onground. Reinforced concrete slab an overview sciencedirect topics. Direct design method ddm for slab systems with or without beams loaded only. See elevated slabs modeling for a full description of how to model the support lines and design strips. Complete materials list available, easy to follow plans. Determination of the bearing capacity of the slabs was made by using the yield. The design method is compared against 44 smallscale tests carried out at ambient and elevated temperatures on horizontally unrestrained slabs with an aspect ratio of 1. Free instant download get how do i make an elevated concrete patio. Reinforced concrete slabs, at least those designed to span in one direction, are no. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Elevated slab keeps foundation stable professional builder.
Contractor and engineer responsibilities an outoflevel elevated slab may be caused by. This feature allows you to model a concrete floor system that is self supporting, as opposed to a beam supported floor, where the floor is a deck that is supported by beams. Once i finish the boundary, can i fix any small errors by stretching the boundary, or do i have to start over. The contractor is usually responsible for controlling. The use of steel fibres for the reinforcement of concrete structures is as competitive as higher is the support redundancy, and as many stress components develop in the structure. In the case of the elevated structural slab on piles, the soil can move up and. Refer to aci 223 for procedures for the design and construction of shrinkage compensating concrete slabsonground. In modern structure design particularly for high rise buildings and basement structures, slabs as floor diaphragms help in resisting external. Vibration design of concrete floors for serviceability1 bijan o aalami2 this technical note covers the design of concrete floor systems for vibration, with an emphasis on simple and expeditious first estimates for a floors vibration response. The design of suspended floors should conform to requirements of aci 318 and aci 421. My research led to versadek, a steel pan system with a dovetail design that allows for clear spans of up to 20 feet or more. The structural design of a concrete floor slab on grade is primarily controlled by the stresses caused by moving live loads and in some cases the stationary loads.
This paper presents a method for the design of high elevated slab formwork in which shoring towers are the central element. Sci p300, composite slabs and beams using steel decking. 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. Reinforced and posttensioned concrete slab design software. Tella firma developed and patented an elevated slab foundation system that combines the efficiency of a slab foundation with the protection of a pierandbeam foundation. View example in pdf format concrete deck slab deck slab design. Elevated concrete slab design structural engineering. An elevated slab is a suspended concrete plate in contrast to a concrete plate supported by beams. Contraction joints in elevated slabs ascc position. Conference paper pdf available september 2012 with. Watch and download floor construction design ideas. Am learning revit by modeling an old building project with 7 elevated concrete slab floors. This process involves shoring the underside of the slab, forming the slab in place, pouring the slab and then removing the shoring once the slab has cured.
744 1158 975 384 272 1132 1223 174 553 1268 1014 1377 1250 342 229 374 593 1024 668 942 1276 839 126 260 1297 1245 1052 1427 1175 1189 587 111 246 331 1064 1003 1472 110 967 1428 1108 447 1026 58 1152 915