Pad foundation in corner, make BCO happy.

[Bruce]

We are converting our coservatry to a habitable space, thus adding a insulated roof which the curent wall is not suitable for. So a beam will we added, resting on a brick column on a new pad foundation and a more robust wall in the other end. The new pad is going to the upper right corner on the drawing.

 

The load from the column, roof (as shared between the two ends of the beam) etc. on the pad is estimated to be 7kN +100% margin=14kN. I have calculated the area of the pad to 500x500mm as per Table 10 of Approved Document A. Thickness is assumed to 400mm thick. I would prefere to not have it so deep but I have allowed to the depth to underside of pad to be 1000mm in line with Section 2EA as we have clay soil and I don't know how to show its shrinkability. A concrete column will be made to get up to the concrete floor level where the builder will make a brick column all the way up to the beam.

I'm worried to about our building control, I don't seem to speak on the same wavelength as them so I'm trying to be proactive here as they are coming around to look at the hole where the pad is going. Have I done enough to calculate this, how can I prep so I'm prepared to make them happy without having to make bigger foundation than needed?

[Redbeard]

Get a structural engineer to do sketches and calcs. BCO always took SE's calcs as 'Gospel' in my experience.

[Bruce]

58 minutes ago, Redbeard said:

Get a structural engineer to do sketches and calcs. BCO always took SE's calcs as 'Gospel' in my experience.

Feels like a very straight forward piece of work, I wonder if I can get away with a onlione SE?

[nod]

11 hours ago, Bruce said:

Feels like a very straight forward piece of work, I wonder if I can get away with a onlione SE?

Online or otherwise BC will want that bit of paper or email