The proof load test standard is the maximum weight that can be applied to the foundation of a structure without damaging it in any way. The load rating is measured in tones and is usually expressed as tons. The loads will be applied to the structure to check its ability to resist loads of all types, with special consideration being given to loads from underground. This type of load testing must be done at the proper pressure and in the proper temperature range. All equipment used in the process must be fully operational and ready to perform.
When a foundation is placed under loads of all types, the load testing procedure becomes necessary. There are many different types of loads that need to be applied. These include; earthquake, hydrostatic, dynamic, positive displacement and applied loads. There are several different types of instruments that are used in the proof load rating tests. Most load testing equipment is made according to industry standards and is certified by reputable organizations.
There are two types of load testing machines. The first is the drum load machine and the second is the continent or rotating lever test. In the drum load test, an externally applied load is placed on the structure for a specific period of time. The structure is then tested to ensure that the applied loads have actually pushed the walls, structures, and other components out of their intended positions.
The second type of load testing system is the rotating lever test. The system is similar to the drum method, in that an applied load is placed on the building for a specific period of time. However, a constant force is continuously applied to the structure to ensure that it does not move out of its original position. It is also important to note that proof load rating is different for each type of test.
For the continental or rotating lever load test, the building structure is supported at specific angles. A load is applied to the structure and then the location of the applied loads is plotted on a graph. The angle at which the loads are applied creates a mathematical representation of the amount of downward pressure applied to the load. The higher the load, the greater the downward pressure will be.
As the name suggests, the proof load is a measurement of the amount of downward pressure that is applied to a load. It is usually the maximum weight that can be supported by the building or part of the wall being tested. This number is referred to as the maximum load rating. Maximum load rating is equal to the product of the area of the wall and its height. In the UK, the maximum load rating is 50 tonnes.
The proof load test equipment used is called a vertical lever frame. These machines are operated with two lever handles. One handle controls the rotational movement of the frame while the other control speeds up or slows the rotation. As the load moves against the frame, the force that is generated is measured. This force is then converted into an electrical signal that is read by a machine that reads the results and displays them on a screen.
The method used to measure applied loads in proof load testing methods has become increasingly accurate due to advances made in mechanical engineering technology over recent years. In the past, loads were applied to the wall by using manual equipment that was either manually turned by the tester or manually controlled via levers. With the developments in the equipment that are used today, the tester can simply turn the machine on to simulate the process of vertical installation. If the applied loads are too heavy, the tester will stop at a pre-determined point. If the applied loads are not heavy enough, the tester will simply have to repeat the process until the load is sufficiently heavy.