Two methods you could use are:
In CE version
1.Set up 2 layers - Layer 'Draw' and Layer 'Construction' (layer construction can be a different colour say -Cyan).
2.In layer draw, draw a rectangle e.g. 194.23mm x 54.5mm (obviously you will know your exact sizes).
3.Then in layer 'construction' select to draw a horizontal line (LH) and in the length field type in 194.23/9 and QCAD will do the math and give you a line exactly one 9th of 194.23mm.You can then place these lines 'snapping' to the end points until you fill the whole line. Do the same with the opposite line, this will give you your reference points on this layer.
4.Then in layer 'Draw' you can draw lines between these reference points giving you 8 equal parts (columns).
5.Repeat this method for all other lines and when you are finished quite simply turn off layer 'construction' - job done.
In QCAD 3 pro
In the 'Points' tool set there is an option to specify the Number of points along a line (see image below), this is very simple to use, you just type in what you need in the 'Number of points' field (9 in your case) and snap to an end point of your line then snap to the other end and 'hey presto' all done - the line is exactly divided into 8 equal parts. Do the same on the opposite line and then just draw lines between the points! Afterwards the points can be deleted or turn off the layer you used for the points.
It couldn`t be simpler than this, it is well worth giving the QCAD pro 3 'free' trial a go - the added features are really good!
Hope this helps