Arches - how strong are they?
A larger arch is able to withstand a heavier load.
Arches are semicircle structures supported at both ends. Arch structures are used in the construction of entrances, windows and bridges.
The building of an arch will normally start with a wooden frame that will support the underside of the arch. Scaffolding is normally used together with the wooden frame for taller arches. The main component of the arch will be the keystone which is located in the middle and at the highest point of the arch An arch which is not build properly will collapse when the frame is being removed.
Most materials that are used in the construction of arches are weak under tensile stress but they are strong in withstanding compressive stress. Such materials are concrete, stone, iron and wood. The design of an arch is such that it is able to minimize tensile stress . and withstand as much compressive stress as possible.
Sawing should be performed by an adult wearing proper safety gear.