What is a footing cage?09-03-2021 | W. van Wijngaarden
In this article we will explain what a footing cage is and what it is used for.
Footing cage ensures the transfer and distribution of forces
A footing cage is used constructively in a building for support and ensures the transfer of forces from the structure to the bearing ground or base. A column, for example made of steel, which is relatively narrow, can cause point load on a floor, which could cause the (storey) floor to collapse at that location. This is prevented with a footing cage between the column and the ground. Because the reinforcement of the base has continuous, bent bars at the bottom, the forces are distributed over a larger area.
Figure 1 The reinforcement transfers forces
Figure 2 After pouring the concrete, the footing is formed
Ready-to-use: precast concrete footings
In the above description, the footing is formed by applying cage reinforcement, formwork and then pouring the concrete. However, ready-to-use precast concrete footings are also available in all kinds of different sizes and shapes. These are mainly used when making a roof, carport or veranda. The footing is then generally placed on a (foundation)pad. Even now, the foundations ensure that the forces from the building are distributed to the bearing soil. And this prevents the whole from subsiding but also being blown over. When the building is made with wooden beams, the concrete footing also ensures that the moisture from the ground cannot penetrate into the wood.
Figure 3 Different sizes and shapes of precast concrete footings
Footing tower crane
Of a quiet different format is a footing for a tower crane. When a tower crane is needed on a construction site, it must of course be stable. The crane is mounted on a kind of concrete platform. This is called the footing for a tower crane. When the crane is no longer needed on the construction site, the crane is disassembled and the footing is being demolished.
Figure 4 Tower crane on a construction site
Reinforcement for footing cage available with Betonstaal.nl
In our range we have reinforcement for:
Standard footing cages:
With the standard footing cages you will find the most common heights and cross-sections:
Customized footing cages:
You can indicate which dimensions and diameters you need, specifying which link type and the positions of the links. When ordering footing cages, you probably also need a reinforcing mesh for underneath. Soon you will be able to create the footing cages on the website with a 3D viewer. Then you can immediately see what the footing cage you order will look like. This reduces the chance of ordering errors.
Do you prefer advice when ordering footing ages? Then contact us.