How to choose the size of building formwork?

Wood square close to the formwork shall be paved longitudinally, with the joint between plates as narrow as possible, flat between plates, and the specification of wood square shall be 5* 10CM or 10* 10CM, and the joint between plates shall be embedded with tweezers or sealed with adhesive tape to prevent cement slurry and cement slurry from polluting the edges of plates. It is forbidden to pry, knock and throw with hard objects. Top formwork: firstly, use scaffolding to lay the wood square horizontally, with the spacing of 0.4-0.6m When the thickness of the poured concrete exceeds 200MM, the spacing should be reduced. Wall formwork: three wooden squares are laid longitudinally behind the formwork, and then three wooden squares are laid horizontally for connection, and the position of wall-penetrating screws is reserved, and diagonal braces are erected. If possible, the steel pipes can be connected into a combination, and the large wall formwork can be hoisted directly, or a single bamboo formwork can be removed and replaced. Beam and formwork: cut the formwork according to the size, reserve the position of wall-penetrating screws, lock the formwork with short scaffolding at four sides, and set the rest supports. Dismantling the formwork: it is forbidden to operate rudely, and handle it with care to avoid man-made injury. Cleaning the board surface: the bamboo formwork must be coated with release agent before each use, and the surface should be cleaned in time after each use. It is forbidden to knock and scrape the board surface.