minimum structural depth and reduced floor-to-floor height. disadvantages: long-term deflection may be a controlling factor. may not be suitable for heavy loads. high concentration of reinforcement around the columns in order to ensure the slab has adequate punching shear capacity. 2. flat slab with drop panels conventional rc or pt
conventional concrete slabs are limited in length and thickness. they require a specific level of thickness to maintain their strength usually at least 4 inches for a slab-on-grade foundation. long concrete slabs elevated above the ground are limited in length due to the danger of cracking.
melting snow and water buildup during a rain storm can result in pooling of water on any flat roof, including a concrete roof. trapped water can attract bugs, bacteria, algea, and mold. 2. collected debris and dirt. a roof that is flat, such as a flat concrete roof, is more likely to collect debris that will typically slide off a sloped roof. the homeowner with a flat concrete roof will be required to clean off this kind of debris from his roof more often.
purpose of waffle slab: waffle slabs provide stiffer and lighter slabs than an equivalent flat slab. the speed of construction for such slab is faster compared to conventional slab. relatively lightweight hence economical. it uses 30% less concrete and 20% less steel than a raft slab. they provide low floor deflections.
1.5 disadvantages of precast concrete. proper construction planning and site management is a must. workers be well trained to ensure that precast components are positioned and connected properly to avoid cases where the columns, beams, walls, or slabs are not well aligned, dislocated or out of plane.
slab disadvantages shifting soil, invasive tree roots and earthquakes pose serious problems for homes constructed on slabs. any cracks in the foundation can cause major, long-term issues that are
benefits and drawbacks of flab slabs toward flab slab floor system. a flat slab belongs to a one-way or two-way method that is condensed in the slab at the columns and load bearing walls known as drop panels. drop panels are used as t-beams over the supports. they improve the shear capacity and the rigidity of the floor system below vertical loads,
advantages and disadvantages of flat slabs 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.
advantages of flat slabs. flat slab construction can deeply reduce floor-to floor height especially in the absence of false ceiling as flat slab construction does act as limiting factor on the placement of horizontal services and partitions. this can prove gainful in case of lower building height, decreased cladding expense and pre-fabricated services.
construction: the benefits of choosing flat slabs include a minimum depth solution, speed of construction, flexibility in the plan layout both in terms of the shape and column layout . 4. types: 1. typical flat slab 2. slab without drop and column with column head. 3. slab with drop and column without column head 4.
a flat slab can also be refers to as beamless slab, it is a reinforced concrete slab supported directly by concrete columns without the use of beams. a plain ceiling is obtained thus giving attractive appearance from an architectural point of view.
in flat plate slab the thickness of slab is uniform and does not have column capital or drop panel; but for flat slab the slab column joints are reinforced by providing column capitals and drop panels to satisfy heavy loads and long spans.
the flat plate is a two-way reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. flat plate system introduction a flat plate is a one- or two-way system usually supported directly on columns or load bearing walls.
disadvantages of slab foundations: labor, excavation and forming costs are lower since the concrete slab is built on grade over undisturbed soil. all normal systems and duct work including heating, ventilation and air conditioning will have limited access. these systems are typically located beneath the floors of a house in the basement or crawlspace.
disadvantages of podium slab in the case of precast hollow podium slab, provision of proper connections is not easy, the unit may damage in the case of improper handling and transportation, and need special equipment and machines to move and lift precast units.
benefits and drawbacks of flab slabs toward flab slab floor system tweet a flat slab belongs to a one-way or two-way method that is condensed in the slab at the columns and load bearing walls known as drop panels.
iv placing of concrete in solid slab is much easier than in slab and girder or any other similar type of bridges. v chances of honey-combing in concrete are less. vi cost of surface finish is less than girder bridges.
advantages and disadvantages of slab foundation. there are many pros and cons of using slab foundations. here is a table below showing the advantages of slab foundations and the disadvantages of slab foundations to provide a clear idea about the topic.
drawbacks of flat plate floor system. though flat plate slab system promises a world of benefits over the traditional beam column slab system, still all is not well with this kind of system too. the main disadvantages of the flat plate system are deflection control, punching shear at columns, and future core drilling.
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. reducing the extent of foundations by reducing the ultimate load.
the disadvantages of flat slabs are as following: 1. in flat plate system, construction of large span is not possible. 2. use of drop panels may interfere with larger mechanical ducting. 3. not suitable for masonry partitions supporting brittle . 4. the thickness of flat plate slab is higher
though flat plate slab system promises a world of benefits over the traditional beam column slab system, still all is not well with this kind of system too. the main disadvantages of the flat plate system are deflection control, punching shear at columns, and future core drilling.
flat plate floor system flat plate floor system: the flat plate is simply a slab of constant thickness supported directly on columns or load bearing walls. this system is one of the most common structural system used in building construction due to the ease and speed of making the formwork as there is a uniform
disadvantages: medium spans. generally not suitable for supporting brittle masonry partitions. drop panels may interfere with larger mechanical ducting. vertical penetrations need to avoid area around columns. for reinforced flat slabs, deflection at the middle strip may be critical.
some disadvantages are if down hill they can end up with rain inside and when pipes need to be replaced that are under the slab the flooring and concrete in that area must be removed.