Pad foundation

[Geo57]

Hi

If 1m x 1m square pad foundations have been specified are next to a boundary, and there is no option to encroach 0.50m onto the neighbouring side, what are the options?

Would it be:

1) step the pads back onto property by 0.5m, and effectively reduce the width of the extension by 0.5m, so that all the pad is on the correct side of the boundary and no encroachment
2) step the pads back onto the property by 0.5m, again so that all the pads are on the correct side of the boundary, but use a cranked beam to allow full width of extension to be built above
3) Or are there any other options?

I appreciate a SE will be needed ultimately, but just exploring potential options first.

Thank you
G

 

[noseall]

Hi

If 1m x 1m square pad foundations have been specified are next to a boundary, and there is no option to encroach 0.50m onto the neighbouring side, what are the options?

Would it be:

1) step the pads back onto property by 0.5m, and effectively reduce the width of the extension by 0.5m, so that all the pad is on the correct side of the boundary and no encroachment
2) step the pads back onto the property by 0.5m, again so that all the pads are on the correct side of the boundary, but use a cranked beam to allow full width of extension to be built above
3) Or are there any other options?

I appreciate a SE will be needed ultimately, but just exploring potential options first.

Thank you
G

Eccentric foundations?

I'm sure there is some implied easement with below ground stuff, though it is almost always contentious.

 

[stevie888]

I'm a touch confused here. You are right to say you need an SE, but who has specified the 1m pads at this point? Are they the right size?

A lot depends on how deep you have to go, what the structure on top is like and what structures adjoin the boundary. Your SE will (hopefully) look at different options.

We normally start with a square pad as it tends to use material if done as reinforced concrete but all that matters is the area so 2m x 0.5m is still giving you the same area but straight away you're potentially 250 closer to the boundary.

As an aside normal domestic pads are easiest done as mass fill with unreinforced concrete

 

[Geo57]

Cheers both for the replies, really helpful

Was just an initial chat with a SE about the plans and was mentioned about 1m x 1m pad foundation (is to support some pillars/steels to support a floor above)

Your explanation of a potential 2m x 0.5m (rather than 1mx1m) gives me some food for thought and great to hear options are available to get closer to the boundary

I’m sure the SE will hopefully come up with a solution to allow it to be as close to boundary as possible

 

[^woody^]

The engineer's job is to design suitable foundations which take account of any site condition and constraints, preferences and available budget. It's important that the engineer is told about these things.

There are several engineering options available for this scenario and mention of a "1m x 1m" sounds like a generic [lazy] size and not anything that has actually been designed

 

[Geo57]

Thanks, it’s a relief to hear that options are available to get the pads as close to the boundary as possible: and will take this forward with SE.