One Way Post Tensioned Slab Design Example

Part Three also covers related topics such as punching shear for two-way slabs and moment transfer at the column. The United States experienced a huge post-World War II building boom as the housing industry raced to catch up with demand. How much does it cost to build a carport? Though many believe a carport to be the simplest, and therefore least expensive, way to shelter a vehicle they can be extremely close in cost to a finished garage of the same size. two way slabs which are supported on all four sides. Anyway, application for the post-tensioning slabs system include: Low to high rise residential and commercial buildings Industrial floor slabs on the ground. Slab Design Example Design a one-way slab for an interior. mechanism in post-tensioned concrete members still needs to be greatly enhanced in many aspects such as shear-flexure interaction in post-tensioned two-way slab systems. Concrete slabs are susceptible to two different types of shear failure: One Way Shear. All Products. Includes: RCC11 Element Design (to BS 8110), TCC11 Element Design (to Eurocode 2) and TCC31 Continuous one-way slab (to Eurocode 2). EXAMPLE BS 8110-97 PT-SL-001 - 1 EXAMPLE BS 8110-97 PT-SL-001 Post-Tensioned Slab Design P ROBLEM D ESCRIPTION The purpose of this example is to verify slab stresses and the required area of the mild steel strength reinforcing for a post-tensioned slab. The use of hidden steel beams and concrete topping [1] significantly increases the attractiveness of this type of slab. That's where DIN Next steps nicely in – a versatile sans serif family that will never go out of. Project Management Templates. There is only one way Waffleboxes can be installed, ensuring each Wafflemat Foundation is laid out correctly - and, to code. Transoms span side to side, supported by the mullions which span from. Our aim is to ensure you find what you are looking for when visiting our site. Civil Engineering Design (1) 12 Dr. The structure is checked both at serviceability and ultimate limit states. Varghese- Advanced Reinforced Concrete Design. 03 Movement; control joints in masonry walls 26 3. Working Stress Design Tables and Examples The following tables, along with the table presented in the first section of this chapter regarding sheathing eccentricity (where post-tensioning is used), are commonly used for working stress design. In order to design the footing size, the actual stress P/A must be less than or equal to the allowable pressure: Design Stresses The result of a uniform pressure on the underside of a footing is identical to a distributed load on a slab over a column when looked at upside down. Detailing is provided as mentioned in SP34. FIGURE S4-2 THREE DIMENSIONAL VIEW OF THE POST-TENSIONED SLAB AND ITS SUPPORT ARRANGEMENT S5 - LOADING ASSUMPTIONS AND VALUES From the design criteria, the post-tensioned slab is designed for a uniformly distributed superimposed dead load of 3. one-way slab assumed as a beam with high width-to-depth ratio, one-way slab design by separating (12 in) or 1 m strip in the long direction as shown in figure 1, then this portion is designed as a beam, the main reason for using 12 in (1m) width strip is quite convenient and helpful because the load usually specified as pound per square foot(kn/m2). VSL systems have a well-earned reputation for their quality, reliability, and durability - and have been used throughout the world since 1956 to build, repair, and strengthen buildings, tanks, transportation and special structures. DESIGN Reinforced Concrete One-way Slab - Free download as Powerpoint Presentation (. , which is the moment of inertia of the shaded area c = 6", low-relaxation Friction, anchor set, long-term losses. Evaluation of fibre-reinforced polymer post-tensioned slab bridges using the Canadian Highway Bridge Design Code. We doesn't provide post tensioned concrete slab products or service, please contact them directly and verify their companies info carefully. For design using FEM results (rather than design strips), the effect of P/T upon strength design has now been implemented. West slab is covered and being heated from underneath. stiff spt = 4 - 15 v. 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. 1 Elevation of a one-way spanning slab (supported on 2 7 slabs) 2. • If shear reinforcement is required to provide sufficient shear strength for a two-way slab system, the fyt for shear reinforcement should be limited to 60,000 psi (410 MPa). The minimum slab depth guidelines specified in Table 2. Latifee Question: Define the term slab, one way slab, two way slab, Shrinkage and temperature reinforcement, main reinforcement. This type of concrete slab construction requires different concrete slab design from the one we normally see that is cast on the ground. In Phase-I, a total of six unbonded post-tensioned (PT) slab specimens were tested. Scroll down to this location and left click on the associated. McCormac, Russell H. The hand solution is used for a detailed comparison with the analysis and design results of the engineering software program spBeam. Prepared for the. They consist of a perimeter footing (edge beam) and a series of narrow internal beams (strip footings) at one metre nominal centres running each way. Modeling concrete cracked section properties for building analysis. 5 One-Way and Two-Way Reinforced-Concrete Slabs. 2L for drop panel haunches. JURGENS his article presents a set of guidelines intended to T assist designers in routine post-tensioning design, beginning with a discussion of the initial decisions that must be made to design post-tensioned floor members. All post tensioned concrete slab wholesalers & post tensioned concrete slab manufacturers come from members. The software is extremely easy to use and is intended for both occasional and regular designers of post-tensioned concrete beams, one-way and two-way slabs, and mat foundations. The verified finite element model was used to investigate the effects of the change in the position of restraint over the slab's depth, axial restraint stiffness, load ratio and aggregate type on the global structural behaviour of unbonded post-tensioned one-way concrete slabs in fire. Cables are arranged as indicated by the engineer and chaired to run through the center of the slab. (13 cm) thick; they were designed as one-way slabs, reinforced with post-. 1: Anchorages provide for the safe introduction of post-tensioning forces into the concrete. A one-way, simply supported slab modeled is in SAFE. Track 2, Example 1 This design example demonstrates how to use the Iowa DOT ENR (Engineering News-. Drill your post saddles and move on. Longer spans can be achieved due to prestress, which can also be used to counteract deflections. Comprehensive Design Example for Prestressed Concrete (PSC) November 2003 (one-way shear and punching (two-way) shear) For this example, a slab thickness of 8. For Post-Tensioned beam M-35 Grade of Concrete is taken for Design. The effects of post-tensioning tendons can be simulated by equivalent loads, inducing. 5 Adjacent spans loaded 20 2. Site Cast Flat Slab Construction One Way Solid Slab System-Support by bearing walls or beams. Includes: RCC11 Element Design (to BS 8110), TCC11 Element Design (to Eurocode 2) and TCC31 Continuous one-way slab (to Eurocode 2). andd=20in. Design floors and foundations reliably and efficiently, saving time and money, and overcoming the most common concerns you face as a designer. Thus, the effectiveness of fibers is considerably higher in two-way than in one-way bending. A civil engineer must know all the aspects regarding the flat floor system. However, much more slander slabs can be constructed using post-tensioned concrete. This will create a thin impermeable membrane that traps the slab’s own moisture and prevents premature drying. EXAMPLE BS 8110-97 PT-SL-001 - 1 EXAMPLE BS 8110-97 PT-SL-001 Post-Tensioned Slab Design P ROBLEM D ESCRIPTION The purpose of this example is to verify slab stresses and the required area of the mild steel strength reinforcing for a post-tensioned slab. Pre-stressing. Part Two of the course was example-intensive, and key concepts were introduced along the way. Columns may use up to 6% rebar, partly because the rebar carries both tension and axial forces. Construction Update: January 30, 2019. Post-Tensioned Foundation Characteristics. 4 Edge-supportedtwo-wayspanningslab 272 12. CS Service Design Type. DIN is that classic typeface you always root for – the one you want to use but just can't bring yourself to because it's limited in its range of weights and widths. EXAMPLE 6 - DECK DESIGN, INCLUDING COLLISION ON A TYPE 7 & TYPE 10M BARRIER 1 2019 Design Example 6 APPENDIX A EXAMPLE 6 - DECK DESIGN, INLCUDING COLLISION ON A TYPE 7 OR TYPE 10 M BARRIER EXAMPLE 6. Calculators for structural engineers, construction professionals and steel building specifiers. Detail Architectural Drawings Fab Tape Seam (DWG & Instruction Sheet) Concrete Slab on Grade – Grade Beam Detail Fig 1 (DWG) Concrete Slab on Grade – Grade Beam Detail Fig 2 (DWG) Concrete Slab on Grade – Grade Beam Detail Fig 3 (DWG) Concrete Slab on Grade – Grade Beam Detail Fig 4 (DWG) Griffolyn Repair (DWG). one-way reinforced concrete slab example. included one control slab built with normal-strength self-consolidating concrete (SCC) and ordinary steel, and two companion specimens built with CRC, and either ordinary (NS) or high-strength (HS) steel. 1(a)], in which the structural action is essentially one-way, the loads being carried in direction perpendicular to the supporting beams or walls. We see other contractors cutting down the bottom of the posts to make an 8" post fit into a 6" bracket. The walls of the basement are typically formed by cinder blocks, and the entire process is done in three portions: first the beams are poured, then the walls, and finally the slab inside the walls. The reinforcement requirements for a rectangular shaped slab and a square shaped slab is different. PT Designer is a Windows-based computer program for the design and analysis of linear post-tensioned concrete frames. In today’s world, where the modern engineering is finding new ways to build longer, more efficient and stronger structures, post tension slab becomes one of their chief requirements. 00 kN/m2 and uniformly distributed live load of 5 kN/m2. Design a one-way slab for an exterior bay of a multi-story office building using the information specified below. The example presented here is for Two-Way Post-Tensioned Design. Overview 5 - 1 Chapter 5 Automated Tendon Layout 5. Slab Design Example. Slabs in which the deflected surface is predominantly cylindrical is called one-way slabs spanning in the direction of curvature. Part Three also covers related topics such as punching shear for two-way slabs and moment transfer at the column. This is why you will find that there are more sub-slab depressurization systems being included in new construction plans. Examples are presented demonstrating the use of these proposed procedures. 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. If its on a deck you can use Ground Penetrating Radar or. Approximate Elastic Method, or "Equivalent Strip" Method (AASHTO 4. Technical Notes #1, “Effective Width and Post-Tensioning,” 3 Section 5 and PTI Technical Notes#8, “Layout of Post-Tensioning and Passive Reinforcement in Floor Slabs,”4 Section 3. Design simply supported pretensioned and post-tensioned flexural members. Plan View of Floor System Assume partitions will not be damaged by deflections. 1 Guidelines for the Design of Post-Tensioned Floors BY BIJAN O. In this post, I will go over the third example in our course that covers the analysis and design of reinforced concrete one-way slabs. To enable you to evaluate the benefits that RC Spreadsheets V4 can offer, trial modules are available. 00300), and the steel will simultaneously yield. Structurally, the parking garage is a separate structure from the tower. Loads: Framing Dead Load = selfweight Superrimposed Dead Load = 25 psf partitions, M/E, misc. Course Study on Post Tension Slab Design. After Design comparing results. On the other hand One-way slabs span in shorter direction and is designed for one way bending. FEM-based design is an effective alternative to strip-based design when strips cannot be easily or reasonably defined. SAFE provides unmatched. 1) In residential construction, suspended floors will generally be supported by loadbearing walls or sometimes beams. The "common" practice is to provide half of this area in each face as a minimum (except for thin slabs with one mat of steel). 1 Designof atwo-way spanningslab 273 12. AALAMI AND JENNIFER D. Comprehensive Design Example for Prestressed Concrete (PSC) Girder Superstructure Bridge Design Step 4 Deck Slab Design Design Step 4. Slab thickness and reinforcement, including a 2. Buettner and Roger J. Post-Tensioned Floors Design for Temperature •Response of beam and one-way slabs different Example Post-Tensioned Slab. PCI MANUAL FOR THE DESIGN OF HOLLOW CORE SLABS SECOND EDITION by Donald R. Though strong enough in tension, these lap joints appear too weak to carry vertical loads. There is only one way Waffleboxes can be installed, ensuring each Wafflemat Foundation is laid out correctly - and, to code. We ensure the most suitable and economical precast design to suit. Modeling of post-tensioned one-way and two-way slabs with unbonded tendons Article in Computers and Concrete 13(5):587-601 · May 2014 with 228 Reads How we measure 'reads'. For example to secure a canoe to a car top, a tarp to a trailer, or any application where a very tight rope is needed. The vast majority of post-tensioning tendons used in these slabs have been unbonded. roof slab (for example a slab to be used. DES is a comprehensive, multidisciplinary engineering organization committed to providing our clients with quality products and services in a timely manner. Rebar reinforcement in this case is technically allowed by code but in our experience, a properly designed post-tensioned concrete slab will minimize cracking due to shrinkage. The beams will often span in the 60 foot range and will typically require no camber due to proper use of post-tensioning. and design a post-tensioned continuous slab supported on parallel beams or walls. 2 VERSION 6. While we started out as two separate print publications many years ago, we’ve since moved into the digital age and combined the great content our readers love into one supercharged magazine and website. 1—Design example: Post-tensioning to minimize cracking. one-way slab assumed as a beam with high width-to-depth ratio, one-way slab design by separating (12 in) or 1 m strip in the long direction as shown in figure 1, then this portion is designed as a beam, the main reason for using 12 in (1m) width strip is quite convenient and helpful because the load usually specified as pound per square foot(kn/m2). RAM Concept contains an advanced feature set that allows for the design of a wide variety of floor systems including post-tensioned, reinforced concrete and hybrid systems, elevated slabs and mat/raft foundations, one-way slabs, two-way slabs, beams, and joist systems. Design using IS: 456-2000. Aalami, Editor For Professionals Engaged in Post-Tensioning Design Issue 6 • August 1995 Cracking in Ground-Supported Post-Tensioned Slabs on Expansive Soils By Ken Bondy1 1 -INTRODUCTION Post-tensioned slabs are widely used as foundations for light residential construction in areas of expansive soils. 4 Concrete Slabs on Open-Web Steel Joists. Structural Con Download with Google Download with Facebook or download with email. Ribbed (Waffle) Slab System. The hand solution is used for a detailed comparison with the analysis and design results of the engineering software program spBeam. 5 , for column an. General contractors depend on us for electrical trenches, plumbing trenches, core drilling and more. An experienced post-tensioning engineer will probably be able to generate larger capacities depending on concrete strength and force applied from the tendons. yielding at one internal section or sections or cause elastic-plastic displacement of the structure or cause the entire structure to be on the point of collapse. Quite large span is achieved using pre-tensioned hollow core slabs. 3L for parabolic haunches, & 0. 0: One-way Joist Slab System. Two Floors Houses. Slab foundation. flat slab 4. 18 × 1 0 5 N; however, when stabilized, the readings indicate that the jack-up forces on the two sides are 55 kN and 53 kN. Economically design post-tensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. Site Cast Flat Slab Construction One Way Solid Slab System-Support by bearing walls or beams. One-way slab 2. Slab design may not be that ‘challenging’ to some compared to designing walls and columns and the parts of the lateral force resisting systems (LFRS). TCC31 One-way Slabs. On the other hand One-way slabs span in shorter direction and is designed for one way bending. yielding at one internal section or sections or cause elastic-plastic displacement of the structure or cause the entire structure to be on the point of collapse. area in tension). Adapt has an excellent stand-alone design package for post-tensioned slabs and beams. Any section along the moment slab should not fail in shear, bending, or torsion when the barrier is subjected to the design impact load. Unit 571 New Smyrna Beach, FL 32128. The slab has to carry a distributed permanent action of 1. Round slab thickness up to the nearest ¼". 2 Definitions 4. concrete slab supported by continuous T beams of 24 ft span, 47 in. b, the percentage of steel requiredfor a balanced design. Also, it is permissible to design a slab with a bonded post-tensioning system having neither top nor bottom non-prestressed reinforcement. Waffle slabs are a reinforced concrete footing and slab system constructed on the ground. Either may be prestressed or a combination of prestressed and reinforced. -One Way slab depths are typically 4 to 10 inches. Some guys use double sided tape in between each layer. For spans over 9 m post-tensioning should be considered. DESIGN CRITERIA There are three criteria which must be considered for the design of a conventional one -way slab system: 1. The slab is without drops. Common design. A: There are long-term plans to add post-tensioned slab design, however in the near term we plan to further improve the analysis and design of mild steel slabs. They form roofs or floors above ground level. To enable you to evaluate the benefits that RC Spreadsheets V4 can offer, trial modules are available. Technical Notes #1, “Effective Width and Post-Tensioning,” 3 Section 5 and PTI Technical Notes#8, “Layout of Post-Tensioning and Passive Reinforcement in Floor Slabs,”4 Section 3. This spreadsheet program provides for the design and analysis of post-tensioned concrete one-way beam and slab systems and two-way flat plate slab systems. Post Tensioned Slab VSL Report. Pile Foundations. The aim of this project is to try and illustrate the methods used for flat slab design using ACI-318, NZ-3101, and Eurocode2 and IS: 456 design codes. Determine the loads based on the building's parameters (Section D. CE 433, Summer 2013. This paper investigates the effect of improper posttensioning of a 2-way spanning concrete slab subject to a central point load. 3 - Post-Tensioned Members For post-tensioned beams and slabs, the recommended values by the Post-Tensioning Institute [PTI, 1990 are as follows: TABLE 3. one way and two way slab design programme Design Spreadsheets In high rise buildings and skyscrapers, thinner, pre-cast concrete slabs are slung between the steel frames to form the floors and ceilings on each level. 3: Shear Strength of Slabs. txt) or view presentation slides online. 1 Design of Raft Foundation Prestressed, Post-Tensioned Concrete Section (ACI 318-08) ACI 318 -350 P-M Interaction Diagram 2. Slab Design Example Design a one-way slab for an exterior. One-way shear design has been added to the design strips for all codes. At ultimate load for such a beam, the concrete will theoretically fail (at a strain of 0. The minimum slab depth guidelines specified in Table 2. For structural engineers and architects, Basheer Bava, BSBG Lead Structural Engineer, provides an indispensable guide on the two-way concrete flooring system. SAFE provides unmatched. Pile Foundations. Two-way post-tensioned slabs have been an extremely popular floor-framing system in American building construction. It was actually the widespread use of the “post-tensioned” slab-on-ground which induced this interest in design procedure and in many studies of reported slab failures. Department of Civil and Environmental Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada. This alternate interpretation is further sup-ported by the analogy between one-way beam and slab framing and two-way post-tensioned slabs with a banded. The ratio of longer span panel (L) to shorter span panel (B) is equal or greater than 2. PDF | The article is about design of prestressed slabs. The first edition of the Post-Tensioning Manual was published in 1972, and as of the time of this writing (2018), they are up to their 6th edition. , reduction of slab thickness, storey height, and building mass, and. Rebar reinforcement in this case is technically allowed by code but in our experience, a properly designed post-tensioned concrete slab will minimize cracking due to shrinkage. 25L for straight haunches, 0. 6 Methodsofanalysisofflat slabs 279 12. The strands or tendons are fed through the ducts (Stage 1) then tensioned (Stage 2) and then anchored to the concrete (Stage 3): The anchorages to post-tensioned members must distribute a large load to the. Post-tension cables are used in concrete construction to allow thinner slabs and greater span lengths between support columns. 2 Cross-section of a composite slab 9. xls TCC32 Ribbed Slabs (A & D). Technical Notes #1, "Effective Width and Post-Tensioning," 3 Section 5 and PTI Technical Notes#8, "Layout of Post-Tensioning and Passive Reinforcement in Floor Slabs,"4 Section 3. 4 Concrete Slabs on Open-Web Steel Joists. 2 for one way continuous slabs Ratio of longer to shorter span does not exceed 1. Two-way slabs 2. Case Studies. 3) Which structural systems the provision applies to - beams, one-way slabs, two-way slabs, or all structural systems. Post-tensioned slabs - Application PT reinforcement is used more in the residential market than in any other sector of construction. ACI 318-14 Section 8. Combined Strap Footing Design. As shown in Figure 1, the one-way slabs had a depth of 100 mm, a width of 400 mm and a length of 2440 mm (4 × 16 × 96 in). 0 or better (C or better). 4 Alternate spans loaded 19 2. Adding a circuit or two is no big deal if your kitchen is above a basement or crawl space and near your electrical panel. Open sections include I-beams, T-beams, L-beams, and so on. JURGENS his article presents a set of guidelines intended to T assist designers in routine post-tensioning design, beginning with a discussion of the initial decisions that must be made to design post-tensioned floor members. It addresses the planning, design, and detailing of slabs. 2—Example selecting the optimum amount of reinforcement to maximize the compressive. There are many advantages and disadvantages of post tensioned slabs which we will discuss in this post. The efficiency of the post tensioned concrete slab system is dependent on a number of factors such as the column layouts, available floor to floor headroom and specific project requirements. One-way Slab Design Spreadsheet Download Rigorous One-way Slab Design Spreadsheet Download Ribbed Slab Design Spreadsheet Download Flat Slab Design Spreadsheet Download Continuous Beams Design Spreadsheet Download Post Tensioned Analysis & Design Spreadsheet Download T Beam Design Spreadsheet Download Column Load Evaluation Spreadsheet Download. 10 Cracks in concrete slabs 24 2. السلام عليكم ACI Detailing Manual Product Details ACI Detailing Manual-2004 SP6604 (ACI-SP-66(04)) is a must-have resource and reference that provides answers to many drawing detailing questions asked by design engineers, architects, contractors, detailers, drafters, and engineering students. DESIGN AND DETAILING OF FLAT SLAB F is the total design ultimate load on the strip of slab between adjacent in one direction (N-S). 1 Overview In the past, the analysis and design of post-tensioned floor slabs has been diffi- cult because of the high degree of indeterminacy of the structure, large number of design requirements, and the need to provide an economical design. In this chapter we will discuss about the analysis of continuous one-way slabs. – This system is composed of slab on supporting reinforced concrete beams and girder. For most cast-in-place floor systems, the slab and beams are cast monolithically and the slab functions as the flange of a T- or L-shaped beam, as shown in Figure below. The proposed slab system must meet the current code. Design Standards eBook FY 2017-18 Two-Way, Mobile Operation, Work on. 1 Worked example 4. On average, the material alone costs anywhere between $5. Design of Slab (Examples and Tutorials) by Sharifah Maszura Syed Mohsin Example 1: Simply supported One way slab A rectangular reinforced concrete slab is simply-supported on two masonry walls 250 mm thick and 3. This form of construction is not very common because of the formwork costs and the low fire rating. Topics will include design and detailing considerations for slabs-on-grade and elevated slabs, consideration of uniformly distributed loads and heavy concentrated forces, horizontal diaphragm design, conventional and post-tension design of one- and two-way elevated slabs. This allowance eases the structural engineer’s design process and ultimately simplifies construction. Analysis of post-tensioned flat slabs Thickness of PT flat slabs is chosen as span/40 to 50 with span/45 as most commonly used value for two-way flat slabs and span/40 for one way slabs [ 6 ]. Concrete Beam Design Concrete Design software that designs one-way flexural members, including beams, one-way slabs and …. As a business we are proud to have worked with some of worlds most prominent museums, galleries and art collectors who have used our products over many years and use continue to purchase our products today. Purposely done, out of proportion elements can communicate additional meaning. CCL Post-Tensioned Slabs can bring unique freedom. REINFORCED CONCRETE SLAB BRIDGES Design Considerations Haunched Slabs Straight haunches preferred in lieu of parabolic Depth at pier should be 2 – 2. The reinforcement requirements for a rectangular shaped slab and a square shaped slab is different. Unless otherwise noted, all referenced table, figure, and equation numbers are from these books. 0 m (Figure 4. Experimental Program 2. Post-tensioned tendons across the joint (25,550 m2). The neutral axis is located by the triangular strain relationships. Design of Slab (Examples and Tutorials) by Sharifah Maszura Syed Mohsin Example 1: Simply supported One way slab A rectangular reinforced concrete slab is simply-supported on two masonry walls 250 mm thick and 3. The floor system is the major part of a building structure, and the selection of an appropriate system is vital in achieving an overall economic building. The reinforcement requirements for a rectangular shaped slab and a square shaped slab is different. Post-tensioned slabs - Application PT reinforcement is used more in the residential market than in any other sector of construction. One-way simply supported slab • Analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Combined Strap Footing Design. Spreadsheets for one-way slabs, ribbed slabs, flat slabs and beams provide powerful design tools. An example is the computation of allowable bending. two way slabs which are supported on all four sides. Economically design post-tensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. Steel Design Steel Design software that easily designs or checks steel beams, columns and single span beam- columns using the ASD and LRFD standards. The concrete floor slabs are approximately 5 in. The use of hidden steel beams and concrete topping [1] significantly increases the attractiveness of this type of slab. Detail Architectural Drawings Fab Tape Seam (DWG & Instruction Sheet) Concrete Slab on Grade – Grade Beam Detail Fig 1 (DWG) Concrete Slab on Grade – Grade Beam Detail Fig 2 (DWG) Concrete Slab on Grade – Grade Beam Detail Fig 3 (DWG) Concrete Slab on Grade – Grade Beam Detail Fig 4 (DWG) Griffolyn Repair (DWG). flat, to limit the total slab thickness for the floor adjacent to the bathroom, it is encouraged to limit to only one drop of 50mm at the wet areas. However, because the continuous two-way tendons had to be placed in a draped parabolic profile -near the top of. Project Management Templates. The advantages of cast-in-place post-tensioned concrete parking structures discussed above are shown by the case histories that follow. The structural integrity requirements in ACI 318-11 Section 18. Labor costs are also reduced because less material is used in slab construction and construction times are optimized. Richardson. As a rule, a spread footing is a quite rigid element therefore, the applied soil stresses are almost linear and in case of a symmetric (with respect to the pedestal) footing, they are orthogonal. In all the chapters, both bonded and unbundled post-tensicmng will be dealt with. Quite large span is achieved using pre-tensioned hollow core slabs. 5 Anchorage at supports 4. 2 Analysis and Design One-way slabs are analysed and designed for the spanning direction similar to rectangular beams. A civil engineer must know all the aspects regarding the flat floor system. Position the post in the middle of the concrete mix, making sure to slope the concrete mix away from the post. Design a one-way slab for an exterior bay of a multi-story office building using the information specified below. 3-1 RECOMMENDED SPAN TO DEPTH RATIOS FOR POST-TENSIONED MEMBERS Continuous Spans Simple Spans Roof Floor Roof Floor One-way solid slabs 50 45 45 40 Two-way solid slabs (supported. - Design of T-Beams in Bending- Determination of Steel Area for a given Moment: A floor system consists of a 3 in. foundation analysis and design examples D The proposed foundation for the home is a system of steel pipe piles, a reinforced concrete grade beam, and concrete columns extending from the grade beam to the elevated structure. This knot has many advantages. Suspended slabs are slabs that are not in direct contact with the ground. 4 Alternate spans loaded 19 2. Design simply supported pretensioned and post-tensioned flexural members. Post-tensioned slabs - Application PT reinforcement is used more in the residential market than in any other sector of construction. In the industry, Black Swamp workers are known as rodbusters, craftsmen who install rebar, anchor rods, and post-tensioned cables. Usually, the slab is a bit larger than the home. Main reinforcement is provided in shorter span and distribution reinforcement is provided in longer span. For this example, the controlling member is the interior slab. West slab is covered and being heated from underneath. 00 kN/m2 and uniformly distributed live load of 5 kN/m2. One Way Shear can cause a localized shear failure along a plane perpendicular to the direction of the shear. Post-tensioned slabs are intrinsically waterproof and. pdf), Text File (. One-way shear design has been added to the design strips for all codes. DESIGN OF PILE CAP. Civil Engineering Design (1) 12 Dr. Both of these are critical to the way that post-tensioning works. com Ezekiel Enterprises, LLC 301 Mission Dr. In addition to designing the deck for dead and live loads at the strength limit state, the AASHTO-LRFD specifications require checking the deck for vehicular collision with the railing system at the extreme event limit state. stiff spt = 4 - 15 v. plate/slab construction in India followed by a review of design methods for lat plate/slab sf tructure designs based on Indian Standard 456:2000[1] and American Concrete Institute ACI-318[2]codes. DETAILING FOR POST-TENSIONING. Note: a C- average is equivalent to. 1 Slab Design Procedure 40 3. Slab thickness and reinforcement, including a 2. Slabs in which the deflected surface is predominantly cylindrical is called one-way slabs spanning in the direction of curvature. I have 2 different beams, one a regular 6x12 timber and another with custom 1/4 round end that I attached to then main timber beam. Post-tensioned slabs could not be penetrated, b/c a stair opening would probably require cutting an area larger than the spacing of the post-tensioning cables. Design a T-section to resist an ultimate external moment M u of 240 kNm. Part Three now continues with the study of two-way, post-tensioned slab systems, including a complete design example using the Equivalent Frame concept. Post-tension cables are used in concrete construction to allow thinner slabs and greater span lengths between support columns. In this experimental study, six post-tensioned light weight concrete (LWC) continuous one-way slabs were tested in the following manner: the flexural behaviors of the members were compared with the calculations from the existing standards. SMARTSLAB provides a total service for the design and construction of suspended slabs. Track 1, Example 7 This design example is a companion to Example 6 and is for prestressed concrete friction piles that are driven in non-cohesive soil at a pile bent that is exposed to possible scour. The structural integrity requirements in ACI 318-11 Section 18. Aalami, Editor For Professionals Engaged in Post-Tensioning Design Issue 6 • August 1995 Cracking in Ground-Supported Post-Tensioned Slabs on Expansive Soils By Ken Bondy1 1 -INTRODUCTION Post-tensioned slabs are widely used as foundations for light residential construction in areas of expansive soils. All Products. xls TCC32 Ribbed Slabs (A & D). 2 Analysis and Design One-way slabs are analysed and designed for the spanning direction similar to rectangular beams. The structural design consisted of cast-in-place one way continuous post-tensioned slabs in the north-south direction and post-tensioned beams in the east-west direction. Slab design may not be that ‘challenging’ to some compared to designing walls and columns and the parts of the lateral force resisting systems (LFRS). stiff spt = 4 - 15 v. #A1: Note beam, one-way slab or two-way slab option to cl. Also, it is permissible to design a slab with a bonded post-tensioning system having neither top nor bottom non-prestressed reinforcement. Can plumbing be The only method for locating post tension cables on slab-on-grade is with Ground Penetrating Radar. Apr 22, 2016- Explore micca_rangasa's board "POST TENSION" on Pinterest. AALAMI AND JENNIFER D. design steps for a two way post-tensioned slab was prepared according to the simple hand calculation provided by PCA (Portland Cement Association) as well as the ACI 318-05 code requirements. Allowable stress design or working stress design (WSD) 2.