Why are waffle slabs used?
Waffle pod slabs provide the perfect depth to create holes in the bottom surface. This makes the installation of various systems easier and less time-consuming.
What is the meaning of waffle slab?
A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. The name waffle comes from the grid pattern created by the reinforcing ribs.
What is waffle raft slab construction most suitable for?
Waffle raft slabs are a better way of building concrete slabs for new homes, extensions and commercial or industrial buildings.
How much concrete is in a waffle pod slab?
Waffle Pod Accessory Calculations To commence, divide the total area m^2 by 1.51 to get the number of Waffle Pods required for the concrete slab. Multiply the number of waffle pods by 1.40 to calculate the number of 4 way spacers. Next, divide the total number of 4 way spacers by 3 to calculate number of 2 way spacers.
How is a waffle slab poured?
The construction process involves a building system of concrete slabs that are shored up by columns. The monolithic poured concrete will form a flat top surface while the rectangular grids form deep concrete beams on the underside, with the beams resembling waffle pockets spread out at right angles.
How do waffle pod slabs work?
When concrete is poured onto the waffle pod assembly, the spaces between each pod become super-strong reinforced ribs. These ribs give a waffle pod slab stiffness and consistency that ensures a solid basis for a new home.
Are waffle slabs better?
Waffle Slabs Need Better Drainage Waffle slabs are a lot less tolerant of poor drainage: Site drainage is ULTRA-important but builders often only improve site drainage after the house is built. Waffle slabs let moisture flow under buildings. This is the opposite of what is required for good performance of a house slab.
How are waffle slabs constructed?
Waffle slabs are a reinforced concrete footing and slab systems constructed on the ground. They consist of a perimeter footing (edge beam) and a series of narrow internal beams (strip footings) at one metre nominal centres running each way through the slab.
What is the difference between raft slab and waffle slab?
Waffle slabs are built on top of the ground and need great drainage and really hard ground for the life of the building. Raft slab footings are dug into the ground, have more perimeter stiffness and more tolerance to poor ground conditions than waffle slabs.
What is concrete raft slab?
A raft slab is a reinforced concrete slab on ground that is strengthened with integral concrete beams in both directions. Usually, a raft slab is used as the foundation for new houses and extensions. At Cornell Engineers, we call the strengthening beams strip footings (because they run in parallel strips).
What makes a good concrete slab on grade?
Other considerations that play a role in the successful construction of a slab on grade include; proper proportioning of the concrete mix, joint design and performance, and the slab thickness. Floor Classifications
What are the different types of concrete floor slabs?
Floor slabs can range from a simple residential basement slab to a heavy-duty industrial floor. However, no matter how basic or complex the floor is, the construction method is similar and includes; preparing the sub-grade and sub-base, placing the reinforcement and concrete, and finishing and curing the slab.
Where is the sub grade on a slab?
The sub-grade is the ground on which the floor is built. The sub-base is an optional layer located on top of the sub-grade and beneath the slab bottom (see Figure 1). The sub-base, while not mandatory, can provide added benefits to the construction and performance of the slab.
What kind of concrete is used in basements?
Concrete slabs on grade are a very common type of concrete construction. Floor slabs can range from a simple residential basement slab to a heavy-duty industrial floor.