PDF 4.5 Procedures for Diaphragms - Memphis Force: Strength or energy exerted Load: Forces applied to a structure Figure 2: Structural Floor Plan Figure 3: Tributary Width 4 EQ. How to Structural Design a Building/House Step by Step ... The floor is framed with prefabricated wood I-joists. A plan of the flat slab building in Examples 1 and 2 ... Sum Point Consider As below. Some material specifications use the allowable stress design (ASD) approach while others use load and resistance factor design (LRFD). The slab should be strong enough to bear the required load according to design. RCC SLAB ROOF DESIGN EXAMPLE Structural Concrete roof or slab is made waterproof by applying stabilised bitumen sheets.The floor is first cleaned and then some bitumen is sprinkled over the surface and then bitumen stabilised sheets are rolled over the surface and joined with other at edges by applying heat through gas torch. In two way slab, the ratio of longer span (l) to shorter span (b) is less than 2. Slabs are usually used in floor and roof construction. Design aids in the form of graphs, charts, and tables are provided to assist designers. Stresses in floor slabs on grade resulting from vehicular loads are a function of . Sample Detailed Estimate Excel Sheet as a folded slab. • When zd is determined, the prestressing force required to balance an Sheet S1 - The Project Specific Notes One Way Slab Design Example: A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Often, the carpenter's Let's go through some of the aspects of what makes these sample engineering drawings so special. Concrete is C30/37. The width "b" of the beams is evaluated on the basis of the span The roofing is composition shingles. The first stage of the design is finding the bending moment of the slab panels. It will be restricted to 4 times the nominal size of aggregate. A slab on grade with an independent stem wall is a concrete floor supported . Design of flat slabs by IS: 456 The term flat slab means a reinforced concrete slab with or without drops, supported generally without beams, by columns with or without flared column heads (s ee Fig. 12). • design the different types of staircases as per the stipulations of IS 456. The exterior cladding weight (mass) was accounted for by including it as part of floor and roof It consists of a flight of steps (stairs) and one or more intermediate landing slabs between the floor levels. Concrete slab (stone aggregate)* ‐‐‐ . Stresses. 3 8.6 200 x 200 hole Figure 3.18 Part p plan of flat slab 3.4.1 Actions kN/m2 . The floor and roof decks for the stair cores structure are 3VLI composite deck with 2" of normal . IS 120353 (Part 1) : 2002 CRITERIA FOR EARTHQUAKE RESISTANT DESIGN OF STRUCTURES. One-way simply supported slab • Analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Assume partitions cannot be damaged by deflections. Slab design is comparatively easy when compared with the design of other elements. A 2 hour fire rating is required. Design examples, charts are included, with derivations of approaches and formulae as necessary. • In any span, the max cable sag, zd depends on the concrete cover requirements and the tendon dimensions. Design wall with fixed base and pinned top (propped cantilever) Neglect corner regions (wall spans one-way only) Top slab is in place and has achieved full strength prior to backfilling (no construction case considered in example) Use center-to-center of supports dimension of 15 feet for both ly/lx = 9.2 / 3.2 = 2.875 > 2 As per the type of slab. Two Way Slab: Two way slab is supported by beams on all the four sides and the loads are carried by the supports along with both directions, it is known as two way slab. Slab Design. Roof Deck Limit States and Design Example Floor Deck Limit States and Current Design Methodology Composite Deck Design Examples -Shortcuts for Multiple Loads . Two-Way Slab Design Based on ACI 318-11 using Finite Element Method. However, it may usually be necessary to adopt reinforced concrete design with continuity of vertical bars in these load bearing walls. The slab should be strong enough to bear the required load according to design. Step 2. 3 Structural Floor Plan: Drawing of the beam, girder, and column layout for a building Please reference Figure 2. SLAB DESIGN Reading Assignment Chapter 9 of Text and, Chapter 13 of ACI318-02 Introduction ACI318 Code provides two design procedures for slab systems: 13.6.1 Direct Design Method (DDM) For slab systems with or without beams loaded only by gravity loads and having a fairly regular layout meeting the following conditions: • Connection details for supported beams and slabs. Slab reinforcement, cantilever reinforcement, slab thickness,roof apex reinforcement.Example of a 1. Ininstances wherethe designis nodifferent thanfor otherprestressed members,the . BASIS OF FLOOR SLAB ON GRADE DESIGN 2-1. f ck = 30 Mpa, f yk = 500 Mpa. I have given an example for the calculation of the quantity steel rod in slab below. wood roof is framed with pre-manufactured wood trusses. SPAC. design of slabs, flexible pile caps and footings. . The depth of slab depends on bending moment and deflection criterion. Daily work report Excel Sheet. There is a nominal strength that is reduced by a factor which must exceed the factored design stress. The following data is available: a) Section properties: d = 0.2 m, concrete: C25/30, Reinforcement steel: B500C, proposed tensile reinforcement: Ø10. I have given an example for the calculation of the quantity steel rod in slab below. Stresses. Our online tools will help you select the most cost-effective products for your project, including joists, roof deck, floor deck, composite deck, and dovetail deck. Cornell Engineer's Sample Drawings. ROOF Live Load = Dead Load Roof cover = 1/2" Plywood Shuttering = 1.5 psf Roof Framing = 3.5 psf 1/2" Drywall Ceiling = 2.0 psf Insulation = 2.0 psf D.L = 19 psf Total Load = 35 psf EXTERNAL WALL Dead Load 2x stud wall = 1.5 psf 1/2" Plywood Panel = 1.5 psf 1/2" Drywall = 2.0 psf 7/8" Stucco = 10.0 ps Insulation = 1.0 psf Total = 16.0 psf . Design of Slab(Two Way) Excel Sheet. One-way Slabs • Normally design as a beam with cables running in the direction of the span at uniform centres. roof trusses in the European tradition. position and perpendicular to the gravitational forces, such slab is adequate for a span say between 12 and 16 feet depending on the design loads, its ultimate capacity may vary accordingly whether it is treated as either a regular reinforced concrete (hard) slab or as a post-tensioned (soft) slab. S = design roof snow load; and E = design earthquake load. The floors have a 1-1⁄2 inch lightweight concrete topping. Slab (FDDM Example 4) •2 x 12 composite deck •20 gage •4 ½" total depth •3 ksiNW concrete •9-0 clear span CHAPTER EIGHT DESIGN OF ONE-WAY SLABS 1 8 CHAPTER 8: DESIGN OF ONE-WAY SLABS 8.1 Introduction A slab is structural element whose thickness is small compared to its own length and width. In case of one ways slabs, the ACI approximate analysis is applicable to one way slab system where a one way slab is continuous with a one way slab. BASIS OF FLOOR SLAB ON GRADE DESIGN 2-1. The general arrangement of the floor plan of a building is shown below. Tributary Width: Width of floor that contributes load to a structural member Please reference Figure 3. 9.20.1 Introduction Staircase is an important component of a building providing access to different floors and roof of the building. For 1m slab width, • Moment, Shear Force, One-way Continuous slab • For continuous slab, moment and shear force can be obtained from Table 3.12: BS 8110 if the following conditions applied. Dec 30, 2020 - Explore Georgia Harrison's board "Slab Roof House Designs" on Pinterest. Also, the longer to shorter span ratio is less than 2 in all panel slabs so all slabs panels are two-way slabs. For continuous bridge decks, the contribution of the longitudinal bars 4.9 Design Example 4--9... Chapter 5 -- Connections in Hollow Core Slabs . Complete design of a home typically requires the evaluation of several different types of materials as in Chapters 4 through 7. thermal expansion and contraction of the concret e 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. Aspects on analysis are only discussed selectively in this Manual. A single slab with two-way reinforcement rebars will be analyzed with RCsolver. Design the slab following the provisions of the ACI code. Let's go through some of the aspects of what makes these sample engineering drawings so special. Two-Way Slabs 10 Example 1: For the given data, design strip 1-2-3-4 of the two way slab for flexure. Online Design Tools. The direct design method, which could have been named the direct analysis method because it determines or prescribes moments for different parts of the slab panel without the need to conduct structural analysis, is explained in the following . • Joint details at panel to panel connections. Cornell Engineer's Sample Drawings. In addition, as the Department has . One Way Simply Support SlabCalculation /Design- Example. CE 403, Fall 2015 Slab Design Example 1 / 5 (ACI 318‐11 Referenced) Design a one‐way slab for an interior bay of a multi‐story office building using the information specified below. Floor-to-Floor Height = 3 m (provided by architectural drawings) Superimposed Dead Load, SDL = m2 for framed partitions, wood studs plaster 2 sides Live Load, LL = 1.9 kN/m2 for Residential floors Exterior Cladding Panels Weight = 2.4 kN/m a' c (for slabs) a' c (for columns) f 400 MPa' y Column Dimensions = 400 mm x 600 mm Solution 1. [Conc Slab, PT Slab] Design Strip Key Plan 312 [Conc Slab, PT Slab] Design Strip Design 313 [Conc Slab, PT Slab] Punching Shear Key Plan 314 [Conc Slab, PT Slab] Punching Shear Design 315 . A flat slab may be solid slab or may have recesses formed on the soffit so that the sof fit comprises a series of ribs in two directions. The floor slabs are at 4.50 m vertical centres. a. Reinforcement Details of One Way Slab Effective Depth (d) Empirical Design Method This example will illustrate the empirical design method. The live loads used for the structural design of floors, roof and the supporting members shall be the greatest applied loads arising from the intended use or occupancy of the building, or from the stacking of materials and . RCC Dog-legged Staircase design Excel Sheet. definitive guide to the proper design and specification of steel decks. Here this one-way slab, So we design the slab as one-way simply supported slab. Guide to the Design of Common Irregularities in Buildings 3 Design Example 1 n Concrete Diaphragm Design—Four-Story Building Roof loads (gravity): Ext. This design example uses the term "podium slab" which, while not a term defined in the 2012 International Considering M20 grade of concrete and Fe 500 steel of diameter of 10 mm Roof Truss member schedule (Main Roof) Roof Truss member schedule (Jamthog Roof) . design, rigidity means relative rigidity. 28 Design Example 1 • 10 PSF on large slab that spreads out load • 20PSF on wood floors to allow for concentrations EXAMPLE: shown in slide at right 20ft x 30ft Slab Total for 8" concrete slab, 6" of debris, allowance for lights & ceiling, and 10psf for rescuers = 105,000 lbs (In this case the 10psf allows for 24-250lb rescuers, which seems to be reasonable) Steel yield strength (fy) = 40 ksi. Concrete Mix Design Excel Sheet. For obtaining a modification factor, the percentage of steel for slab can be assumed from 0.2 to 0.5%. The design method is followed as per Annexure D of IS 456:2000. If ratio of longer span to shorter span is less than 2, then it is two-way slab, otherwise one-way slab. There were no engineers or engineering principles to guide the design. For example, in 20mm nominal size aggregate is used in concrete , the minimum thickness is limited to 80mm according to Cl 5.3. This allowe d the casting of four sections of the roof on each form, using the lift-slab p r inciple of stacking one slab on top of the other. MANUAL FOR THE DESIGN OF HOLLOW CORE SLABS SECOND EDITION by Donald R. Buettner and Roger J. Becker Computerized Structural Design, S.C. . ROOF Live Load = Dead Load Roof cover = 1/2" Plywood Shuttering = 1.5 psf Roof Framing = 3.5 psf 1/2" Drywall Ceiling = 2.0 psf Insulation = 2.0 psf D.L = 19 psf Total Load = 35 psf EXTERNAL WALL Dead Load 2x stud wall = 1.5 psf 1/2" Plywood Panel = 1.5 psf 1/2" Drywall = 2.0 psf 7/8" Stucco = 10.0 ps Insulation = 1.0 psf Total = 16.0 psf . This example set of plans is for a single storey house with a concrete slab on ground, concrete Besser block masonry walls and a timber roof trusses. This design example uses the term "podium slab" which, while not a term defined in the 2012 International For these walls, the recommended thickness is 150mm. All cantilever slabs are one way. The effective depth d of two-way slabs can also be assumed using cl. Stresses in floor slabs on grade resulting from vehicular loads a re a function . To make distinctions between the equations quoted from the Code and the Load on slab: 4″ thick mud. 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