Depending on how much of the foundation is to be underpinned it may be possible for more than one section to be carried out simultaneously – subject to them being sufficiently remote from each other.
Yn dibynnu ar hyd y sylfaen y mae angen ei hategu, gallai fod modd gweithio ar fwy nag un darn ar y tro – cyhyd â'u bod yn ddigon pell oddi wrth ei gilydd.