Hi Tim,
I am sawing from both sides, either flipping the beam if sawing from on top or switching from right to left sides if sawing horizontally.
If you look at those pictures you can see the distance I saw before changing sides. It would be around 70 cm or the length of the saw blade at the angle I can get before the handle contacts the beam.
The saw is a fine tool and with more practice I am hoping to get better using it so I can do more cutting only from one side.
Regards,
Don