It can also be usually part of ‘second fix' works, corresponding to the construction of skirting boards, architraves, doors, and so forth. Carpenters may required to prepare shuttering (formwork into which concrete is poured), constructing stairs, putting in door and window frames, and so forth. Most carpenters study their trade through a three- or four-year apprenticeship. For annually of the program, apprentices must complete at least a hundred and forty four hours of technical training and 2,000 hours of paid on-the-job training. In the technical coaching, apprentices study carpentry basics, blueprint studying, arithmetic, constructing code necessities, and safety and first-assist practices.