What are the disadvantages of flat slabs?
Disadvantages of Flat Slab
| 1 | Span length is medium. In flat plate system, it is not possible to have large span. |
|---|---|
| 2 | Not suitable for supporting brittle (masonry) partitions |
| 3 | Use of drop panels may interfere with larger mechanical ducting |
What is flat slab give advantages and disadvantages?
Flat slab is an RCC slab built monolithically with supporting columns and reinforced in two or more directions. Beams are not provided to support the slab. The loads are directly transferred to the columns. In flat slabs, the columns are provided with enlarged heads called capitals or column heads.
What is the disadvantage of solid slab?
The main disadvantages of solid slab bridges except for shorter spans are: i) Greater cost of materials. ADVERTISEMENTS: ii) Larger dead loads.
What is the meaning of voided slab?
A voided slab is a reinforced concrete slab in which voids reduce the slab’s weight. In this slab, lightweight void formers are placed between the top and the bottom reinforcements before concrete casting to replace concrete in the middle of the slab.
Which of the following are the advantages of flat slab?
Benefits of Using Flat Slab Construction Method
- Flexibility in room layout.
- Saving in building height.
- Shorter construction time.
- Ease of installation of M&E services.
- Use of prefabricated welded mesh.
- Buildable score.
What is the difference between flat slab and solid slab?
The main difference between flat slab & conventional slab-beam system is that the one is directly supported on the column while another system has a beam for support. The load is transferred directly from slab to column in the flat slab.
What is the disadvantage of ribbed slab?
Disadvantages of Ribbed and Waffle Slabs Not suitable where the live loads are huge as heavy manufacturing buildings, warehouses. The thickness of the slab is controlled as the requirement of fire resistance. Formwork cost is high. Sometimes difficult to install the electric equipment.
What is the advantage and disadvantage of ribbed slab?
Slab thickness of ribbed or waffle slabs is less than other slab systems. Therefore the weight of slab is reduced. This saving of weight can change in structural characteristic. Lighter and stiffer slab than an equivalent flat slab.
What are the disadvantages of a solid structure?
The longer life time of solid structures is also only partially true. Unlike stone and concrete, wood can rot when moisture penetrates and thus lose its structural capabilities.
Is code for voided slab?
IRC: SP:64 “Guidelines for the Analysis and Design of Cast-in-Place Voided Slab Superstructure” was published by IRC in 2005. It is warranted to align these Special Publications of IRC with IRC:112 “Code of Practice for Concrete Road Bridges”, which is based on the Limit State approach.
What is void former?
Void Former is a lightweight material in structural concrete in foundations, beam and slabs to fill structurally non-working areas and against clay heave. They are strong enough to support the weight of wet concrete as well as steel reinforcements. They come in either full form or in honeycombed form.
What are the limitations of direct design method of flat slab?
Limitations of Direct Design Method
- There must be at least three continuous spans in each direction.
- Panels should be rectangular and the ratio of longer/ shorter spans within the panel must not exceed 2 otherwise one-way actions will prevail.
Is flat slab economical?
Flat slab structure is more economical than that of conventional slab structure. The cost of flat slab structure is reduced by 15.8% compared to conventional slab structures.
What are some disadvantages of frame structures?
Frame structures have economical designs. Disadvantages of Frames: In frames structures, span lengths are usually restricted to 40ft when normal reinforced concrete. Otherwise spans greater than that, can cause lateral deflections.
Which of the below is a disadvantage of frame structure?
Which of the below is a disadvantage of frame structure? Explanation: Span length is usually restricted to 40ft when normal R.C.C. is used. Spans greater than this can cause lateral deflections.
What is plastic void?
Plastic void former’s can be produced using recycled raw materials. Most of the time they are stack-able for easy transport and storage. Foundations built with plastic void former’s have a similar R-value like polystyrene, but they maintain their performance unaltered over a long period of time.
What is a void former?
What is void former made of?
KORE’s Void Formers and Void Fillers are structures made of Expanded Polystyrene (EPS), which is a light weight material that has substantial weight bearing load capacity. Void formers decrease the volume of concrete, reducing weight while increasing the strength.
What is a void slab system?
The voided slab system provides a huge opportunity to reduce the cost and environmental impact without compromising with the performance of the structure. Void formers are employed to make voided slabs to eliminate unnecessary concrete.
What are the advantages of voided concrete slabs?
Voided slabs are suitable for spaces with irregularly positioned columns, Flat lower surface provides uninterrupted passage to conducts and pipes, Easier further processing, plastering, or mounting of suspended ceiling. Use of plastic formwork embedded in concrete slabs decreases the concrete volume used (up to 20%),
What is a avoided slab used for?
Voided Slabs Voided Slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications. Voided Slabs generally span 30′ – 90′. These slabs can be used in applications where slab depth may be an issue or when construction speed is a factor.
What are the disadvantages of solid slabs?
One of the main disadvantages of conventional solid slabs is their weight which not only imposes strain on itself but also puts a huge burden on the building and the foundation. The idea of creating engineered voids within a solid slab system helps to reduce the overall weight of the slab system.