For staircases of internal communications there is an opening. It can be partially filled with a board for comfortable walking when pouring, leaving a small hatch with a temporary ladder. Using multilayer plywood reduces installation time, but the estimate is doubled.
At the last stage the contours of partitions and walls are placed with paint. This will improve the accuracy of the passage of electricians, other engineering systems.
Install side shields
Flanging overlap is made by hand from a board with a thickness of 4 cm minimum, you can use a board 5 cm, bought at the initial stage. In order to avoid deformations on the external planes of the walls, pieces of timber are mounted, which are the stops for the formwork side shields.
The maximum strength of the interface plates / walls get the following way: