A suspended concrete slab is a rectangular, flat and reinforced concrete structure. It comes in different shapes and sizes like any other concrete slab but the depth is lesser than others. This concrete slab is mainly used in floors, roofs, bridge decks, etc.
There are three major designs for suspended concrete slabs in order to produce the right strength to weight ratio. But in every case, the bottom side gets changed whereas the top remains flat.
Corrugated: The first major design is corrugated slabs; these slabs are made by using a combination of concrete and steel. The concrete is poured into a steel tray that brings strength. This tray has the corrugated design and the corrugation runs across from one end to another.
These corrugations bring strength to the slab and in addition to it, the slab doesn’t bend or deflect. So, naturally, this enhances the slab’s ability to withstand temperature fluctuations and bad weather conditions.
Corrugated slabs are well known for its high strength to weight ratio
Ribbed: Ribbed slabs have a very different design. It has wideband beams that run between the columns and narrow ribs of equal depth span the orthogonal direction and to top it off a top slab is used.
Ribbed slabs are popular for their light weight and strength and this means the foundation’s extent can be reduced which results in cost reduction. Ribbed slabs are robust, have good thermal mass and they are fire resistance. Also, the use of ribbed slabs accelerates construction work.
With ribbed slab, you have considerable strength added in one direction and you get good vibration control. So, if you are looking to use it at a site where vibration is an issue then contact suspended slabs in Sydney for more details.
Waffle slab: As the name suggests these slabs have a waffle-like design. But it is comparatively deeper than a ribbed slab and the thin top has narrow ribs spanning in both directions. Also, the band beams or the column heads have the same depth as the ribs. Other than this it has the same characteristics as a ribbed slab.
These are the basic and most popular design patterns used in the construction of suspended slabs in Sydney. Now, let’s take a look at the two reinforcement design of the concrete slabs.
One-way slabs: These slabs need moment resisting reinforcement only in the direction of its shorter side. This is mainly due to the moment on the longer axis is minimal and can be ignored.
So, if the ratio of the length of long to the short side is less than 2 then it qualifies as a one-way slab.
Two-way slabs: These slabs need moment resisting reinforcement in both directions.
So, if the ratio of the length of long to the short side is greater than 1 then it qualifies as a two-way slab.
These are some very basic points on suspended concrete slabs but if you want to know more contact any company that provides concrete suspended slabs in Sydney.
And, if you have any concrete related works to do then there are many companies that provide such services. But, before you hire someone to do a thorough research of your own and negotiate the rate.