What is 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. The beams around the outside are called edge beams.
What is a raft structure?
A raft is any flat structure for support or transportation over water. It is usually of basic design, characterized by the absence of a hull.
What is the definition of slab in ceramics?
Slab Construction – A construction technique in which clay is rolled into thin sheets and manipulated into shapes. Slip – Suspension of clay in water, used as a “glue” or for decorating.
What is the difference between raft slab and waffle slab?
Q: What is the difference between a raft slab and waffle slab? A: The primary difference between the two is raft slabs cast against the ground. Waffle slabs, on the other hand, cast upon polystyrene void formers and strips of concrete.
How thick is a raft slab?
Raft foundations (sometimes referred to as raft footings or mat foundations) are formed by reinforced concrete slabs of uniform thickness (typically 150 mm to 300 mm) that cover a wide area, often the entire footprint of a building.
What does raft stand for?
Role, Audience, Format, Topic
The RAFT (Role, Audience, Format, Topic) writing strategy, developed by Santa, Havens, and Valdes [1], helps students understand their role as a writer and communicate their ideas clearly by developing a sense of audience and purpose in their writing.
What can you do with a slab in ceramics?
These soft slabs can be formed into lovely, flowing structures that are often reminiscent of leather. They can be used with slump molds or draped over hump molds to create repeatable forms, leaving the potter to concentrate more on finishing the form with surface textures, decorations, or firing effects.
What is slab method?
The slab building technique involves rolling out clay to an even thickness – usually 1 cm – then cutting shapes, folding, bending, manipulating and joining together to form a finished object. Slab objects are left to dry EVENLY before bisque firing for at least 7 days – turning regularly.
Where is waffle slab used?
Waffle slabs are used for larger span slabs or floors and used when there is limited requirement for number of columns. The load carrying capacity of waffle slab is greater than the other types of slabs. They provide good structural stability along with aesthetic appearance.
How thick is a waffle slab?
85mm thick slab continuously over the top of the pods. Slabs at least 150mm above ground. 100mm above ground in well drained sand and 50mm above ground if next to paved areas sloping away from building.
What are the types of raft foundation?
Solid slab rafts or solid raft foundation
What is concrete raft foundation?
A raft foundation is a reinforced concrete slab under the whole of a building or extension, ‘floating’ on the ground as a raft floats on water. This type of foundation spreads the load of the building over a larger area than other foundations, lowering the pressure on the ground.
What is mat raft foundation?
A raft foundation, also called a mat foundation, is essentially a continuous slab resting on the soil that extends over the entire footprint of the building, thereby supporting the building and transferring its weight to the ground. A raft foundation is often used when the soil is weak, as it distributes the weight of the building over the entire area of the building, and not over smaller zones (like individual footings) or at individual points (like pile foundations ).
What is a concrete raft?
A raft slab is reinforced concrete slab that is strengthened with integral concrete beams in both directions. Usually used as the foundation for new houses and extensions, raft slabs in Australia are designed to comply with Australian standard AS2870.
