The mild steel form has hinges at the supports and crown, spans 100 cm, and rises 25 cm. The ends ought to rest on rollers at one point. Several places are indicated at equal distances along the horizontal span of the arch for the application of weight. Since this structure is statically determined, the horizontal thrust produced by any load system acting on it may theoretically be estimated. It can also be measured in practise by neutralising the outward movement of the roller end. The equipment might come with a dial gauge with a magnetic base and a 25mm travel. A supporting stand and a set of weights should be included with the apparatus that is to be provided