Design Of Reinforced Concrete Structures ii Two-Way Slabs. Two way slab design.
Two Way Slab Reinforcement Details Concrete Slab Reinforced Concrete Structural Drawing
When the ratio LSis less than 20 slab is called two-way slab as shown in the fig.
. ΣAtr cross-sectional area of the transverse reinforcement along the development length Lsyt ΣAtrmin cross-sectional area of the minimum transverse reinforcement which may. Design steps of two-way slab. One way spanning slabs.
Two-Way Slab Reinforcement Details Concrete slab Reinforced concrete Structural drawing. One-way slab Two-way slab are the types of the slab. In two way slab main reinforcement is provided along both direction.
Steps in Two Way Slab Design. Find effective depth d assuming reinforcement diameter. Design of Two-way Slabs Example 12 Use i WSD ii USD to design the two-way slab shown below carrying floor finish 30 psf random wall 50 psf and live load 60 psf Given.
X 18 in edge beam dimensions 14 in. Assume corners are held down. The slab is outside buildings which.
Step 1 Find out the Total Number of Main Bars Distribution Bars. Dec 18 2020 - Reinforcement detailing of a slab is done based on its support conditions. The Wire Reinforcing Institute recommends the use of the Subgrade Drag Theory for slabs up to 150 feet in length.
These structural details dwg AutoCAD drawing download for concrete beam and slab system will help you to do any slab reinforcement detail drawing. If ratio of longer span to shorter span is less than 2 then it is two-way slab otherwise one-way slab. Result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete.
The slab is supported all around walls of width 300 mm. Is adequate for one-way shear. X 27 in interior beam.
Get One Month FREE at LinkedIn Learninghttpsbitly2Zq5t95Full Learn To Read Structural Drawing Course at the cheapest ratehttpbitly2Xw0dkvThis vide. A slab is built to. ACI 360 Design of Slabs-on-Grade refers to this as a Type B slab.
Slabs could be simply supported. Number of Distribution Bars Length of Shorter Side Spacing 1 54001501 28 Numbers. The slab has to carry a distributed permanent action of 10 kNm2 excluding slab self-weight and a variable action of 30 kNm2.
Therefore Span Ratio m 1319 068. Bending will take place in the two directions in a dish-like form. The following slab reinforcement arrangements are specified in.
Tributary area for two-way shear is 16 575 2 18 14 2487 12 A Tributary u ft2 V q 0193 2487 480uu u u A Tributary kips do O. Two Way Slab Reinforcement Details in English Unit Concrete Slab. Choose layout and type of slab.
Slab carries the loads imposed on it and duly transfers the forces either in a one. A rectangular reinforced concrete slab is simply-supported on two masonry walls 250 mm thick and 375 m apart. Design the slab system shown in Figure 1 for an intermediate floor where the story height 12 ft column cross- sectional dimensions 18 in.
The slab is the horizontal structural component that provides a flat and purposive surface. In two-way construction load transfer is by bending in two directions. In one way slab main reinforcement is parallel to shorter direction and the reinforcement parallel to longer direction is called distribution steel.
Type of slab is strongly affected by architectural and construction considerations. 27-Development and splices of reinforcement 28-Connection details 29-Reinforcement supports 210-Special details for seismic design of frames joints walls diaphragms and two-way slabs 21l-Corrosion resistant coatings for reinforcement PART B-RESPONSIBILITIES OF THE DETAILER Chapter 3-Placing drawings pg. And floor finishes 1 KN per meter square.
Step 3 Cover to reinforcement Determine cover required to reinforcement as per Tables 116 and 117. Slab ll a b m Case C a D C L C C C L C. Basic Steps in Two-way Slab Design 1.
Download Floor Slab Reinforcement Detail. Two-way slabs are generally defined as suspended slabs where the ratio of the long to the short side of a slab panel is 2 or less. Two way slab reinforcement detail drawing pdf.
Determine the minimum thickness of slab from serviceability criteria of deflection control. The slab has to carry a live load of 4 KN per meter square. Lets discussed the design code requirement specified for slab reinforcement details.
This article is the first in a series on recommended reinforcement details for cast-in-place concrete construction. Draw panel of slab and indicate maximum design moments shears and in- plane loads if any per unit width of slab. 27Development and splices of reinforcing steel 28Joint details 29Reinforcing steel supports 210Special details for seismic design of frames joints walls diaphragms and two-way slabs 211Corrosion-resistant coatings for reinforcing steel Details and Detailing of Concrete Reinforcement ACI 315-99 Reported by ACI Committee 315.
Maximum Spacing of Reinforcement At points of max. Use M20 Concrete and 415 steel. The materials to be used are grade C25 concrete and grade 500 reinforcement.
Slabs could be simply supported continuous or cantilever. Bar Bending Schedule for Two Way Slab. All these two-way slab reinforcement details dwg will be used in any concrete beam slab floor system.
Accordingly main reinforcement is. Determine whether the slab is one-way or two-way slab by calculating aspect ratio. In two way slab the corners may be held down by restraints or may be allowed to lift.
Also check if thickness is adequate for shear. F c 3 ksi f y 50 ksi. The slabs having ratio of longer length to its shorter length LyLx greater than 2 is called one way slab otherwise as two way slab.
Slab may be supported on walls or beams or columns. S2t ACI 1332 and s45cm ACI 7123. Slab Reinforcement of 2 way Slab.
In one way slab main reinforcement is parallel to shorter direction and the reinforcement parallel to longer direction is called distribution steel. Such a surface may be floor roof or ceiling. In two way slab main reinforcement is provided along both direction.
Reinforcement Details Loads After all percentages of the static moments in the column and middle strip are determined the steel reinforcement can be calculated for negative and positive moments in each strip. Choose slab thickness to control deflection. FIGURE 13123B VALUES OF K FOR BEAMS AND SLABS K 01 K 005 K 0 Lsyt k4k5Lsytb k4 1 -Kλ where λ ΣAtrtrminAs.
Use actual effec- tive depth in each direction. In general there are similar requirements for one-way and two ways slab when slab reinforcement detail drawings are prepared. Choose Design method Equivalent Frame Method- use elastic frame analysis to.
Slab thickness of 7 in. Two-Way Concrete Floor Slab with Beams Design and Detailing. Number of Main Bars Length of Longer Side Spacing 1 60001501 41 Numbers.
Two-Way Concrete Floor Slab with Beams Design and Detailing. Slab shear strength two-way shear Check the adequacy of slab thickness for punching shear two-way shear at an interior column Figure 4. Clear area for each slab is 13 19.
Step 2 Find Out the Cutting Length of Bars. Q Design a reinforced concrete slab for a room of clear dimension 4-meter x 5 meters.
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