What is the maximum span of slab?
The answer to question is simple, the limit to span is about 6–15m depending upon how much you spend because as the length increases depth of slab increases since bending moment is increasing and the structure will become more and more uneconomical. Also drop panel size increases for gradual transfer of load.
How do you calculate the effective span of a two way slab?
Two Way Slab
- Effective Depth (d): For deflection control.
- Effective Span: ClearSpan + d.
- Load Calculations: Total Load = D.L. + F.L.
- Mid Span Moment: Corners not held down conditions is given as per IS: 456-2000 P-90 CI D-2.
- Effective Depth of Flexure:
- Reinforcement in Mild Strip :
- Check for Cracking:
- Check for Deflection:
What is the span of a slab?
Basics of Reinforced Concrete Slab Design. 1. Effective Span of Slab….2. Thickness of Slab.
| Type of slab | Ratio of span to depth |
|---|---|
| Continuous and spanning in one direction | 35 |
| Simply supported and spanning in two directions | 35 |
| Continuous and spanning in two directions | 40 |
| Cantilever slabs | 12 |
What is span of one way slab?
Difference Between One way Slab and Two way Slab
| S.No | One Way Slab |
|---|---|
| 11 | The one-way slab is economical up to a span of 3.6 meters. |
| 12 | In one-way slab quantity of steel is less. |
How far can a solid slab span?
Depends on what type of slab you want, for PT slab and flat slab you can take span more than 10 meters. For typical conventional slab maximum you can take it 6 meters. you can go exceed even the 31 meters (mostly said maximum distance), with little extra care while designing, and superior quality materials and control.
What is the maximum span of a concrete beam?
150mm – ‘Standard concrete Beam’ The clear span at maximum spacing in a standard domestic application is 4671mm.
How do you reinforce a two way concrete slab?
- Step 1: Check the Type of Slab.
- Step 2: Preliminary dimensioning.
- Step 3: Load calculation.
- Step 4: Moment Calculation.
- Step 5: Check for Depth.
- Step 6: Reinforcement Calculation.
- Step 7: Check for shear stress.
- Step 8: Check for deflection.
Where is two way slab used?
In two way slabs, the load will be carried in both the directions. So, the main reinforcement is provided in both directions for two way slabs. Example: These types of slabs are used in constructing floors of a multi-storeyed building.
What is one way and two way slab?
The basic difference between One Way and Two Way Slab is that the bending moment occurs only in one direction i.e. the shorter direction in One Way Slab while in Two Way Slab bending moment occurs in both directions i.e. shorter and longer.
What is 1 way slab and 2 way slab?
How far can concrete span without support?
Reinforced concrete allows a wide range of structural options and provides cost-effective solutions for a multitude of situations—from residential buildings with moderate live loads and spans of about 25 ft, to commercial buildings with heavier live loads and spans ranging from 40 ft to 50 ft and beyond.
Is block and beam cheaper than slab?
Beam & block floors While a simple concrete slab can be relatively cheap, it takes time to lay and dry out, so over the last few years, the beam and block suspended floor has become more prominent. It’s slightly more expensive, especially on relatively small jobs, but for speed and convenience it’s hard to beat.
How to design a two-way slab?
Design steps of two-way slab: Case I: Restrained slab. Step 1. Determine whether the slab is one-way or two-way slab by calculating aspect ratio. If ratio of longer span to shorter span is less than 2, then it is two-way slab, otherwise one-way slab. Step 2. Determine the minimum thickness of slab from serviceability criteria of deflection control.
What is the difference between two way slab and spanning slab?
In two-way slabs, the load will be carried in both directions, thus main reinforcement is provided in both directions for two-way slabs. The slabs are considered as spanning two-way when the longer to shorter span length is less than a ratio of two.
What is the maximum distance between two slabs?
The spacing should not be greater than 300mm. Step 1. Determine whether the slab is one-way or two-way slab by calculating aspect ratio. If ratio of longer span to shorter span is less than 2, then it is two-way slab, otherwise one-way slab.
How to calculate the effective span of a concrete slab?
Effective span of slab along longer side = Clear span + effective depth of slab = 6000 + 120 = 6120 mm [Reinforcement in longer span lies above main reinforcement in shorter span so effective depth is less by a diameter of bar] Step 4. Determine the total factored load due to live and dead load considering 1m wide strip.