Geometry
1•2•Build also allows to dimension plates bearing in one direction. Add a new calculation model for this purpose by clicking on the icon 
in the toolbar.
Suppose that the span is 4m, and that the plate is simply supported (in other words draw a beam with length 4m and simply supported).
The width of the plate is written on the left bottom of the window. The default is 5m, but you can change this any time by double clicking this field. Activating the following dialogue, allowing you to specify a new value for the plate width.
Loads
Then define a permanent and life load of 2kN/m².
Analysis
The optimal size of this place in reinforced concrete, can quickly be determined by the icon 
. Choose a plate with a fixed thickness of 150 mm.
In addition, define the concrete strength (C25/30), together with the quality of steel ( fyk= 500N/mm ²) and the reinforcement coverage (35mm). Start the calculation with the button Analysis.
By double clicking the plate in the window, you get access to detailed information about the proposed reinforcement:
Here you can adjust the reinforcement details for both lower and upper reinforcement if you wish. However, if you specify a practical reinforcement that doesn’t meet the requirements of the calculation, then 1•2•Build will draw a red cross over the reinforcement sketch.
It should be noted that in 1•2•Build elastic deflections are calculated not taking into account any cracks nor creep! The actual deflections can be a factor 2 to 5 higher than the proposed elastic deflections.
