Pt Slab Maximum Span

For the design of prestressing force it is supposed that prestressing tendons are designed in scheme d) from the figure below. 2017 AASHTO Bridge RADBUG Meeting 8/15/2017 Kansas City, KS. The cambers for these spans represent dead-load deflections of L/845 and L/1824, indicating a very stiff floor system. Design of Waffle Slab (without beams) by Direct Design Method 32 32 32 C 1 C 2 C 3 C 4 132 C. Minimum slab thickness, h = L/20 = 10’ x12”/20 = 6”. The modeled slab is 10 inches thick by 36 inches wide and spans 32 feet, as shown in shown in Figure 1. For heavy roofs or in areas with substantial snowfall or winds, call your local building department for code requirements. In Spancrete hollowcore plank, such loads may be distributed over several slabs. The saving of materials tends to be. Section Civil Engineering Sheet no. pt-structures. Simple-span girders made continuous behave as continuous beams for all loads applied after the deck slab hardens. The number of construction joints in concrete structures should be minimized. 4 125 Maximum tensile strain of reinforcement 10. 0 Long direction Short direction 2. This problem is consistent with the requirements of the 2006 International Building Code for garages storing vehicles accommodating not more than nine passengers. Joints should be spaced about 10 feet and a maximum of 15 feet. Adduced guidelines in design of p restressed slabs are dictated by two factors: necessity of stresses. 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. members has been ensured under the provision of IS: 456-2000. I am building a four post workbench type caster table with a 65" span. Foreword This Report is intended to serve as a manual of good practice for the design of prestressed concrete flat slabs. depth slabs are erected worldwide with the maximum span limit s et at around 12÷13m. The shorter clear span of a simply supported two way slab is 3250 mm, and the longer clear span is 3450 mm. The vast majority of post-tensioning tendons used in these slabs have been unbonded. Load values for single span and double spans are to be reduced. [Note: L=span length in inches]. The plain concrete slabs behave in a brittle fashion as expected. Post-tensioning allows longer spans to be used. dead load (weight of structure and fixed loads) 10 lbs/ft 2. 3L for parabolic haunches, & 0. the cast-in-place concrete in deck slab shall be class 4000d. Max Span Length. SPAN CHARTS Maximum clear span for ceiling joist- w/ gypsum clg. Figure 2:. 8% of the gross cross sectional area of the. In this post, I will go over the sixth example in our course that covers the analysis and design of reinforced concrete one-way slabs. With curved girders, show at diaphragm lines (10 feet < L < 22 feet, where "L" is the maximum distance between haunch measurement locations). These planks or slabs are ideal for offices, shops, light industrial, or high quality residential properties where spans are often greater with increased loadings. The top will be 2" concrete and lower shelf will be holding 400lbs. Appleton (Tecbnical University, Lisbon, Portugal), Carlos A. the slab is kept symmetrical it does not seem to matter. GARAGE SLABS Post-Tensioned concrete is a very common type of concrete structure for parking garages today and can be constructed below grade or above grade. According toArticle 9. The minimum numbers of I-girders in any roadway width is four if the span is over a lower roadway and the vertical clearance is less than 20 feet. The Powertruss PT BRACE ® narrow wall brace is a light-weight metal truss frame that can be used for all types of lateral wall bracing ranging from N1(W28) to C4(W70) cyclonic, providing bracing values of up to 22. STRUCTURAL TECHNOLOGIES is the exclusive manufacturer of VSL post-tensioning products and construction systems in the United States. A flat slab is a two-way reinforced concrete slab that usually does not have beams and girders, and the loads are transferred directly to the supporting concrete columns. So, main reinforcement is provided in both direction for two way slabs. 50 MPa) for beams; although the Code’s limit of maximum compressive stress is much higher, values higher than these typically. The development of PT-Plus creates a completely new set of rules to assist with the design of one-way, post-tensioned composite slabs that incorporating Fielders’ KingFlor® composite steel formwork profiles and bonded pre-stressing strands as tensile reinforcement in the slab bottom face. We use them frequently ourselves. This guide presents information on the design of slabs-on-ground, primarily industrial floors. The saving of materials tends to be. refer to udot standard specifications for additional material and construction deeper than 74 inches. For example, a post-tensioned 10. A finite element model may be created to analyse a complicated loading arrangement. The beams usually have spans in the range of 50 ft to 62 ft. ) 24" 3" 4x4 brace 45° 24" 24" (2) 2x4 braces 24" a a 4x4 post header. 2 circular drip groove bot. BONDY INTRODUCTION Two-way post-tensioned slabs have been an extremely popular floor-framing system in American building construction. At 16 inch spacing, 15 feet 2 inches and 13 feet 3 inches at 24 inch spacing. (2) Design of slab “S1”:. 53), being built with the beam and a part of it. Wheeled vehicles: 25% for spans up to 12 m and in accordance with the above curve for Spans in excess of 12 m. Brochures, product spec sheets, webcasts, customer case studiesYou'll learn more about our extensive portfolio in the resource library. Pt Slab Maximum Span Generally speaking, bridges can be divided into two categories: standard overpass bridges or unique-design bridges over rivers, chasms, or estuaries. If a slab does not fulfill the conditions to use the force coefficients in the. Quick notes for different long span concrete slabs. Control joints will be spaced approximately 12'‐0" on center in each direction to help control slab cracking. 022Fl * the design moments in the edge panel may have to be adjusted according to 3. Standard Spread Box Beam Spans • To simplify calculation of bearing seat elevations and bearing pad tapers, these are not permitted with standard spans: – Vertical curve combined with a skew – Change in cross-slope – However, a bridge designer can take care of this geometry with a standard span on a custom basis. 72" minimum box girder height for PT sections; For haunched girders, mildly reinforced field cast filled bottom flange build up is allowed. For beams continuos from both ends,. The maximum loss of stiffness is at the connection of the overhang to the beam, where the negative moments have reduced the slab stiffness to 63% of its uncracked value. The beams usually have spans in the range of 50 ft to 62 ft. Main bars are 12 mm in diameter @ 150 mm centre to centre spacing ; Distribution bars are 8 mm in diameter @ 150 mm centre to centre spacing. The GIRDER-SLAB ® system is widely used in the Northeast, New England, and the Mid-west for high-rise (8 stories and above) or large square footage low rise buildings. slab surface. 140mm x 60mm (80 mpa @ 28days) Mass 17kg/m. One-way slab: It is slab supported by beams on two opposite sides to carry the load along one direction. For the case where the steel deck acts as tensile reinforcement for the composite deck-slab, the steel shall conform to AISI S100, Section A2. Pt Slab Maximum Span Generally speaking, bridges can be divided into two categories: standard overpass bridges or unique-design bridges over rivers, chasms, or estuaries. BONDY INTRODUCTION Two-way post-tensioned slabs have been an extremely popular floor-framing system in American building construction. PT flate slab and PT flate plate. The diagonal struts reduce the deck slab thickness and the bottom slab width (Fig 2-2). Find the dead load and the live load per square meter of the slab. Bridge Beams. Ultimately, this means greater freedom in design and architecture during and after construction as well as savings in material costs. Find the latest quotes for (Silicon Laboratories, Inc. fire rating of one or two hours without applying drywall or spray-on fireproofing to the deck. Domestic concrete slabs only improve on these spans a little, while commercial flat concrete slabs commonly cover 6 to 8 metres between supports, and floors using steel or concrete beams can extend these limits a little. With some limitations, reinforcement for slabs can be sized using the Subgrade Drag Theory in order to increase the spacing of control or construction joints. 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 For longer spans, the bowstring is designed as a through truss. 0 MPa) for slabs and 350 psi (2. Abstract- Two way slabs are slabs in which the surface load is transferred in two directions. The slab is supported on 230 mm thick brick masonry walls all around. 5 m with 5 prestressed concrete elements AASHTO Type IV as shown in Fig. Equal slab spans Maximum slab spans, mm BONDEK® sheets continuous over 2 slab spans Formwork deflections limits L/130 (Visual appearance not important) Equal slab spans Notes: 1. flat slabs and pad foundations Shear There are three approaches to designing for shear: • When shear reinforcement is notrequired e. Note: Many slab crews use metal or wood spikes in the gravel to aid in maintaining a level surface. Effective width of the flange can be calculated as per ACI 318 section 8. Accordingly, neither SFPA, nor its members, warrant that the design values on which the span tables for Southern Pine lumber contained herein are based are correct, and specifically disclaim any liability for injury or damage resulting from the use of such span tables. Rib spacing of 600 to 1500 mm can be used. For beams and slabs, construction joints are preferably located at about one-third of the span length. However, the number of strand and the development length shown on the standard drawing may be considered adequate. SLAB IN SECTION Slab depth mm Block Type Lintel Type Slab DL kN/m 2 Concrete Topping Vol. Simple online calculator to find the maximum slab length of a concrete floor by knowing the values of thickness of reinforced slab, yield strength, the reinforcing ratio. Must span a minimum of 1/6 the clear span on each side of support (ACI 18. Canam Buildings offers to owners, real estate developers and general contractors an array of structural components, including the Hambro D500 or MD2000 composite floor system, a composite girder and a transfer slab system which can be combined in order to design better adapted and more functional buildings. PT slabs on ground can be placed and stamped just like with any other concrete slab. DESIGN OF STIFFENED SLABS-ON-GRADE ON SHRINK-SWELL SOILS Jean-Louis Briaud President of ISSMGE, Professor Texas A&M University, USA Remon Abdelmalak Geo-Engineer, Dar Al-Handasah Group, Cairo, Egypt Xiong Zhang Assistant Professor, University of Alaska, USA. Reliance on 3D finite element software for design and drawings. Milbank hollowcore floors (also known as slabs or planks) are pre-stressed concrete slabs with internal tubular voids, creating an efficient and lightweight plank that is far lighter than other floor slabs of equal thickness or strength. But we have seen designers balance more than 400% DL in some spans, which almost always leads to sudden failure of the slab. Foreword This Report is intended to serve as a manual of good practice for the design of prestressed concrete flat slabs. SLAB AND BEAM DESIGN Bending Moments and Shears. tension, and 620 psi in flexural tests. aprons? I need to minimize the thickness and width of the aprons. Bottom of slab elevations shall be shown over each stringer at centerlines of bearings and at intervals of 22 feet or one-tenth of the span length, whichever is less. If the design shear strength is greater than or equal to the maximum shear force, the design is satisfactory. To calculate the amount of concrete needed, you'll need to consider the thickness in addition to the length and width of the slab. For this reason, the maximum tendon spacing for tendons is several times larger than that for reinforcement in nonprestressed floors. The elevated structural slab on piles is a very good solution but can be expensive (about 200$/m2 in 2010), and represents an unnecessary expense for light structures. This means the number of columns per floor is reduced, which opens up the floor area and increase the flexibility of the structure. Our rapid, all-weather construction shortens project schedules and allows you to get down to business faster. p or p ¢ intermediate diaphragm 1'-0" 1'-0" 1 2 see bottom slab drain hole detail see bottom slab drain hole detail 6" strand spa. 2) Design a waist slab type staircase comprising of a straight flight of steps supported between two stringer beams along the two sides. Support spans of up to 5 m can be attained, depending on loads. Steel bridges Tracked vehicles: 10% for all the spans. Beam span maximums are based on a maximum anticipated live load. Codes dictate how high the railing must be, as well as how far apart the balusters can be. One half of the tendons in each direction is uniformly distributed in the span and one half is concentrated around the columns. If the moment varies along the length of a Design Strip then the individual design cuts will show a varying amount of moment demand at each section. placed over purlins or joists spaced not more than 2. PREFACE TO PRODUCT LOAD TABLES DESIGN RECOMMENDATIONS Maximum Bottom Range of Maximum Precast Tension Stress Span-To-Depth Ratio Double Tee Floor Slabs 12 f 'c 25 to 30. The beams usually have spans in the range of 50 ft to 62 ft. 0 kip/ft live load. 2 VERSION 6. [email protected] With some limitations, reinforcement for slabs can be sized using the Subgrade Drag Theory in order to increase the spacing of control or construction joints. Wood species is variable as well. 1 Insulation and Fenestration Requirements by Component E402. Advanced Engineering Solutions Ltd Project Job Ref. 5" occurring anywhere in the span. For slab edges, the notional span is defined as the distance from a point on the slab edge to a crest at interior of the floor (Fig. ANY slab crew should agree to a slab with maximum flatness variation of +/- 3/8 of an inch over the entire slab area. Longer Spans. Modeling Post-Tensioned Concrete Haunched Slabs (XCSH) in BrDR Abdul Hamada, P. <--ZohreSeverler--/title> <2. For this reason, the maximum tendon spacing for tendons is several times larger than that for reinforcement in nonprestressed floors. As part of the complete design solution, a load versus span calculator is available to designers and specifiers. 3 Reduction in building height. The test results for conventional. of the slab to minimize cracking due to shrinkage and temperature effects and to help distribute concentrated loads. Introduction Reinforced concrete slabs supported on beams on all sides of each panel, generally termed two-way slabs, have been widely used as structural system in reinforced concrete building in Brazil in last decades. 2017 AASHTO Bridge RADBUG Meeting 8/15/2017 Kansas City, KS. Slabs can span up to 28 feet. We satisfy the demand for high quality, reliable products that are available within short lead times in an industy there the demand for building products is almost insatiable and. [email protected] A reinforced concrete slab is built integrally with its supports and consists of two equal spans, each with a clear span of 15 ft. According toArticle 9. In addition to the recommended procedures, other methods are described for the sake of completeness and to compare. Clemson University 2. Roof Deck - Maximum Spans NOTES: For more information regarding Canam steel deck, please refer to the Steel Deck or contact our experts by phone at 1-866-466-8769 or online. Check for deflection is as per the provsions in Cl. Top and Bottom Clear Cover is 25 mm; Development length. Double Tee slabs are made with G50 concrete and strands ASTM A416 as standard, each double Tee slab is normally 2400mm wide. ANY slab crew should agree to a slab with maximum flatness variation of +/- 3/8 of an inch over the entire slab area. couplers and pull out bars provision were first left into core walls at the time of wall casting and later slab was casted with necessary PT reo. 5" width of a 2x4. Must span a minimum of 1/6 the clear span on each side of support (ACI 18. 80 mm steel sheet: 10: AS1170. SPAN 8 FEET O. 1, though the span of the deck is the length BC or DE, the slab will span along AB or CD being the shortest distance between the supports. Longer Spans. Choose from multiple types of decking and from 2x6 up to 2x12 joists. The percentage variation is not too high 1. by Kevin Miller Date 16/05/2008 Chk'd by Kevin Miller. Integrated into each beam case is a calculator that can be used to determine the maximum displacements, slopes, moments, stresses, and shear forces for this beam problem. keys were 6 to 8 inches deep and 5 to 6 inches wide. The value is 1000kN-m 2) Maximum Column reaction in PT frame structure. Two-way slab i. If construction joints are necessary to facilitate construction, it is normally aligned perpendicular to the direction of the member. I have a ceiling slab 60 ft x 30 ft x 9″ thick that does not have propper support under neath, im thinking of running PT cables a cross the 30 foot span, can you tell me approximaterlly how tight between the cables and what wood be the ballpark cost of this kind of repair in order to open up the whole basdement?. Bending Moments in Beams of Two Way Slab Systems By Ibrahim Mohammad Arman An-Najah National University, Israel. With curved girders, show at diaphragm lines (10 feet < L < 22 feet, where "L" is the maximum distance between haunch measurement locations). Page 5 • TF 700-R-03 Update Figure 10 Slab 1 Slab 2 Where: d = Beam depth, in (mm) B = Sum of all widths, in (mm) M = Moment, kip-ft (N-m) l C = Cantilever length, ft (m) 3 664 Ml C B d = Combined Slabs Figure 11 d b b b t f(t) f(t) f(t) f(t) Effective Width of “T” Beams Slab Segments Figure 9. be approximately 1 13 of the middle strip in no case greater in details the spacing of the bars at the column strips can bars near the support unless otherwise indicated or shown those along the longer span at center and over the longer span 2. Customizable Double Tee Concrete. Load values for single span and double spans are to be reduced. online free live maximum floor live load capacity is a great engineering tool to help you calculate floor strength use it now. Option 4: Post Tension slab- similar to option 3 but cables or "tendons" are stategically placed and tensioned with a jack after curing of the slab and before forms are removed. Roof Deck - Maximum Spans NOTES: For more information regarding Canam steel deck, please refer to the Steel Deck or contact our experts by phone at 1-866-466-8769 or online. Heavy duty long span floors Long spanned floors with high live loads Industrial and commercial buildings Rui Pedro Frazão Barreiros Abstract: The main purpose of this dissertation is to establish a comparative analysis among several flat slabs, taking into account parameters such as the live load, the span, the material (normal or. TwO-wAY POST-TENSIONED SLABS wITH BONDED TENDONS BY KENNETH B. 2 which is given in the following table. 1 were used to establish the number of strands required for the various girder depths as well as development length. For beams continuos from one end and simply supported from the other end, the distance L2 may be taken as 0. I have a ceiling slab 60 ft x 30 ft x 9″ thick that does not have propper support under neath, im thinking of running PT cables a cross the 30 foot span, can you tell me approximaterlly how tight between the cables and what wood be the ballpark cost of this kind of repair in order to open up the whole basdement?. CRITERIA) REINFORCED CONCRETE SLAB ALLOWABLE LOADS. If a slab is supported on all the four sides but the ratio of longer span to shorten span is greater than two, the slab will be considered as a one-way slab. The minimum slab thickness prescribed in ACI 318-05 for flat. A finite element model may be created to analyse a complicated loading arrangement. 8 x 8 in x 0. For beams and slabs, construction joints are preferably located at about one-third of the span length. More detail regarding the column layout will be covered in the column design section of the report. this is the maximum span what is the minimum to determine if this slab one way or two way and what is the condition of this slab if it sample support or continuous and determine if we can use solid or flat or hollow core slab as per the architectural we should see and study the geometry and determine what is the suitable system. For the design of prestressing force it is supposed that prestressing tendons are designed in scheme d) from the figure below. For shower areas, it is recommended to have kerb instead of a second drop to avoid thickening the slab at non-drop area. 2 Left click Jurisdiction Publications. 2 For Beams and Slabs Continuous over three or more Spans. a hypothetical maximum punching shear stress for the assumed surface. The slabs typically have spans in the range of 17 ft to 27 ft. FLOOR DECK DESIGN TOOLS. The average maximum elevation difference damage threshold was reported to be 1 to 1. They are engineered to reduce story height while maximizing ceiling height and address market-specific building requirements. 0 Area of reinforcement required. When non-uniform loads such as bearing wall or post loads are applied, special considerations are necessary for using the load tables. Example-2: One-way simply supported slab, Span length, L= 10 ft. single reinforced concrete general notes class 2 exposure condition is utilized for the slab design in 0' fill limited to a maximum of 10 degrees from vertical. The excellent load-bearing capacity and structural efficiency allows you to build large areas with fewer partition walls. 2 is minimum of: i) 5hf =5 × 5 =25″ ii) 18″ Therefore 9″ spacing is O. For example, in a 4-inch [100 mm] thick slab the joint spacing should be about Saw cut Tooled Wall or Column Expansion joint material Slab on grade Column Contraction joints intersect at diagonals of the square Form openings which will be filled after floor has. Although drop panels result in somewhat higher formwork costs, a relatively shallow slab system is achieved in situations where punching shear would otherwise preclude the use of a flat plate. Our rapid, all-weather construction shortens project schedules and allows you to get down to business faster. Option 4: Post Tension slab- similar to option 3 but cables or "tendons" are stategically placed and tensioned with a jack after curing of the slab and before forms are removed. Find the dead load and the live load per square meter of the slab. Perfect Slabs is a supplier of Elematic SA en Shukuma Flooring Systems. Bottom of slab elevations shall be shown over each stringer at centerlines of bearings and at intervals of 22 feet or one-tenth of the span length, whichever is less. Accordingly, neither SFPA, nor its members, warrant that the design values on which the span tables for Southern Pine lumber contained herein are based are correct, and specifically disclaim any liability for injury or damage resulting from the use of such span tables. If uncoated form deck is used, deduct the weight of the slab from the allowable superimposed uniform loads. Comparative Study of Slab Culvert Design using IRC 112:2011 and IRC 21:2000 Shivanand Tenagi1 R. a hypothetical maximum punching shear stress for the assumed surface. Spans should not exceed 80 ft. 6% increases. @ 2" 6" 5" min. 4, edge of slabs shall either be strengthened or be supported by an s. The Powertruss PT BRACE ® narrow wall brace is a light-weight metal truss frame that can be used for all types of lateral wall bracing ranging from N1(W28) to C4(W70) cyclonic, providing bracing values of up to 22. This problem is designed to demonstrate how to check the ability of a composite slab to carry a 3000 lb point load over an area of 4. Columns and shear walls means vertical elements form work we cane remove after24 hours but slab form work depend on span same like this(L*2+3) L=Maximum length of span. It is manufactured in precision made steel moulds to stringent quality standards. 3 shall be used. This is because the. Check for deflection is as per the provsions in Cl. Keywords—flat slabs, flat plate floors, IS codes, post tensioned slabs. The slabs typically have spans in the range of 17 ft to 27 ft. This is a CAD dwg drawing for a Reinforced Concrete Mid-Span Slab Beam Support Detail. At 16 inch spacing, 15 feet 2 inches and 13 feet 3 inches at 24 inch spacing. Slab R‐Value Table 402. 4m in short direction and 12m in long direction. methods for lat plate/slab sf tructure designs based on Indian Standard 456:2000[1] and American Concrete Institute ACI-318[2]codes. Flat plates and Unbonded PT slab design reinforcement has been used in offices, apartments, condominiums, and parking structures. Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans. ACI 360, "Design of Slabs-on-Grade", refers to this as a Type B slab. The GIRDER-SLAB ® system is widely used in the Northeast, New England, and the Mid-west for high-rise (8 stories and above) or large square footage low rise buildings. 2 For Beams and Slabs Continuous over three or more Spans. The only exception is if slab span tendons are kept clear of. Bending moments in beams of reinforced concrete buildings 1. CHAPTER 8b. It is the solution of choice for more expensive structures. Phone (03) 9369 4944. If construction joints are necessary to facilitate construction, it is normally aligned perpendicular to the direction of the member. A suspended concrete floor is a floor slab where its perimeter is, or at least two of its opposite edges are, supported on walls, beams or columns that carry its self weight and imposed loading. • Integrated IFB beams with under-tied hollow sections to create a span of 12,5 m, which is 30% larger than is possible with integrated beams. One half of the tendons in each direction is uniformly distributed in the span and one half is concentrated around the columns. • Water-cooled composite slab using sinusoidal stainless steel façade, which acted as framework to the concrete slab of 300 mm depth. Maximum Joint Spacing should be 24 to 36 times the thickness of the slab. The types of slabs are 1. 4); Design sagging moment (per m width of slab) ; m sx = 2. aprons? I need to minimize the thickness and width of the aprons. Construction of PT flat slabs (with drop panel ) /PT flate plates is one of the quickest method available for multi storey buildings. Deck slab cantilevers at the edge of the deck will control the position of the outer main girders. pdf), Text File (. —Structural forms in which slabs of concrete are supported by T-beams are very common in rein forced concrete structures. We satisfy the demand for high quality, reliable products that are available within short lead times in an industy there the demand for building products is almost insatiable and. Clemson University 2. Beam Span Calculator For help, simply click on the beside the section you need help with, watch this Tutorial Video. Conventional slab is of two types i. The slab is reinforced with the bars in both directions parallel to the spans with the steel for the shorter span placed farthest from the natural acis to five the greater effective depth. 25 Kn/m Floor finish = 2 Kn/m Filling load = 3. Design of Flat Slabs 407 WIDTH FOR RAME NALEIS SPAN A SPAN B SPAN SK 9/8 Typical plan of flat slab negative moment limitation. 2x 1 where x = distance of load-from support closest to load I = effective span. RESEARCH STUDY. The concrete slab happens to be 20 inches deep. 8 is the ratio of span (L=2290 mm for both slabs) to mid-span vertical deflection, shown on the right-hand vertical axis, against mid-span vertical deflection, shown on the horizontal axis. 1 Conventional slab: Conventional slab is a slab constructed with columns and beams. The post-tension would help reduce the. Lumber Species Southern Pine Douglas Fir Douglas Fir-Larch Hemlock-Fir Spruce-Pine-Fir Redwood Western Cedar Ponderosa Pine Red Pine. It’s identified as approximately same. , and 72 in. SPAN:DEPTH CHART Ribbed slabs (One-way joists) Introducing voids to the soffit of a slab reduces dead weight and increases the efficiency of the concrete section. Concrete floor slabs may be in situ or prefabricated. Top and bottom longitudinal and transverse slab reinforcement, supporting beam reinforcement detail. Abstract- Two way slabs are slabs in which the surface load is transferred in two directions. Design calculation Design of one way slab Slab S1 Span of One way slab L = 2m Section provided D = 130 mm d = 105 mm Loads on slab Self weight of slab = 3. For this reason, the maximum tendon spacing for tendons is several times larger than that for reinforcement in nonprestressed floors. 5m for unidirectional slabs. Beam Span Data Tab This is basically the same tab used for a normal steel beam except that there is no ability to specify unbraced compression flange lengths. Up to live loads of about 50 psf, the deflection criteria usually govern, and the economical span length range is 15 ft to 25 ft. If the moment varies along the length of a Design Strip then the individual design cuts will show a varying amount of moment demand at each section. Overall depth, h (includes insitu slab thickness; {beam L/30, slab L/40} cont) 1500 mm NOT OK Note minimum practical slab thickness to strand no. Since PT is simply reinforcement, there really aren't any specific decorative applications related to post tensioning. Calculator works for rectangular beams, positive-moment and negative-moment T-beams, and 1-way slabs, as shown in the sections below:. Maximum bay sizes ± 30' Slab f - "span length of beam or one-way slab, as Some Recent Problems in Applying ACI 318 Code Deflection Criteria. The objective of this reinforced concrete design example is to design a one ribbed concrete joist floor system per ACI Code 318-11. This is because the. Deck slab cantilevers at the edge of the deck will control the position of the outer main girders. 5 kNm/m ; Moment Redistribution Factor ; βbx = 1. 2 is minimum of: i) 5hf =5 × 5 =25″ ii) 18″ Therefore 9″ spacing is O. aprons? I need to minimize the thickness and width of the aprons. Props at Mid-Span Only MetFloor® 55 - Span table - Using Grade 350 Steel - Normal Weight Concrete using Fibredeck MAXIMUM SPAN (m) with no additional reinforcements Deck Thickness (mm) Props Span** Fire Slab Fibredeck 0. Remedy for slab deflection We have PT slab, constructed after jumpform work i. @ 2" 6" 5" min. We satisfy the demand for high quality, reliable products that are available within short lead times in an industy there the demand for building products is almost insatiable and. R-value Calculation for Concrete Slab. Members of the Institute include major post-tensioning material fabricators in the U. Slab modeling, analysis, and design procedures feature a suite of sophisticated tools and applications, couple with post-tensioning, punching-shear, and beam detailing, and integrate the influence of soils, ramps, columns, braces, walls (rectilinear or curvilinear), and other interfacial elements. For the maximum typical span of 12’-10”, a 18 gage deck was selected. the cast-in-place concrete in deck slab shall be class 4000d. 75 Kn/m Bending Moment B. Where an opening in floor framing is framed with a single header joist the same size as the floor joist, the maximum header joist span shall be _____feet. 2) Design a waist slab type staircase comprising of a straight flight of steps supported between two stringer beams along the two sides. Keywords—flat slabs, flat plate floors, IS codes, post tensioned slabs. Transfer Plates / Beams In buildings it is sometimes needed to transfer, at a certain level, some of the vertical loads to other alignments in order to obtain bigger spans at the lower levels. Vulcraft’s painted or galvanized form deck can be considered as permanent support in most building applications. Table 8 gives the limiting span/effective depth ratios for beams spanning up to 7 m (23 ft) and flat slabs spanning up to 8. Slabs - Design Strips. To better understand the working methodology of income tax slab, one has to first understand […]. A finite element model may be created to analyse a complicated loading arrangement. parking structures is a one way slab supported on beams. 6m for two-way slabs and to 12. The saving of materials tends to be. Quick notes for different long span concrete slabs. Simplified equivalent width, stress Real max. 5mt PT beam along with Exposed slab with PT beam. Ribbed slabs are suitable for medium to heavy loads, can span reasonable distances, are very stiff and particularly suitable where the soffit is exposed. members has been ensured under the provision of IS: 456-2000. I criterion for temperature and shrinkage. ** contractor may elect to cast the pt girder in one piece if the shipping weight is less than 182 kips & the shipping route allows the shipment of long girders. this is the maximum span what is the minimum to determine if this slab one way or two way and what is the condition of this slab if it sample support or continuous and determine if we can use solid or flat or hollow core slab as per the architectural we should see and study the geometry and determine what is the suitable system. Vulcraft’s painted or galvanized form deck can be considered as permanent support in most building applications. Canam Buildings offers to owners, real estate developers and general contractors an array of structural components, including the Hambro D500 or MD2000 composite floor system, a composite girder and a transfer slab system which can be combined in order to design better adapted and more functional buildings. p or p ¢ intermediate diaphragm 1'-0" 1'-0" 1 2 see bottom slab drain hole detail see bottom slab drain hole detail 6" strand spa. The excellent load-bearing capacity and structural efficiency allows you to build large areas with fewer partition walls. For beams and slabs, construction joints are preferably located at about one-third of the span length. Heavy duty long span floors Long spanned floors with high live loads Industrial and commercial buildings Rui Pedro Frazão Barreiros Abstract: The main purpose of this dissertation is to establish a comparative analysis among several flat slabs, taking into account parameters such as the live load, the span, the material (normal or. 2 For Beams and Slabs Continuous over three or more Spans. On average, the material alone costs anywhere between $5. One-way shear results are available through Display > Show Reinforcement > Display type change to shear reinforcement. with imposed loads upto 10KPa. fire rating of one or two hours without applying drywall or spray-on fireproofing to the deck. Span/depth ratios for reinforced concrete slab design to BS8110. The maximum ratio of span to a depth of a simply supported slab is 30.