The point load consists of the reaction from the 2 supported beams that equals the tributary space (1/2 the cantilever span times the spacing of the cantilevers) times the pressure load on the ground and the self-weight of the joist.
Knowing the ways of calculative the tributary space for columns is very important once we calculate the axial masses on the column.
In manual calculations, the key issue of calculating the column masses is that the tributary space.
When we have a tendency to calculate the masses on the vertical component we think about the tributary space technique for columns however it's not restricted solely to the columns.
Axial masses on the concrete walls are calculated from this technique.
Depending on the realm of the column, we have a tendency to calculate the axial load on the column. When there square measure space masses, we are able to use this technique directly.
However, once there's a line load on the slabs, we are able to not use it directly.
For example, once there's a wall on the block and it's settled on a part of the quarter of 1 panel, in such things, we have a tendency to think about the gap ratios.
Depending on the gap to the wall, the axial load on the column is calculated. If the wall isn't settled within the one-fouth of the space, thought-about, for the column, the wall load won't be count for that specific column if we have a tendency to use the tributary area technique.
The load calculation is going to be incorrect. Therefore, we've got to deviate from the tributary space technique for these sorts of calculations.
In such things, distance to the wall is taken into account and masses on close columns square measure calculated supported the relative distances.
The load on the tributary space should be a continuing pressure.
The supported components should be merely supported, single-span bending components or will moderately be assumed to transfer half their supported load to the supporting component.