Pier to support steel

[Andyk78]

View media item 64727
Maybe a simple one here, just had a pier rebuilt to carry a steel above. The pier is built half on the kitchen and half on the new extension floor as pictured uneven levels. Is this ok or should the pier have been built on even level after the screed has been laid. Hope this makes sense and please te me
It's fine!

 

[noseall]

The pier should not be built off the floor at all.

It should be built off a foundation if it is a structural support.

Whoever designed the size of that pier needs a slap.

 

[Andyk78]

The pier is bonded in and goes 350mm deep. The structural engineer recommended it be rebuild as a solid brick pier, its sat on the foundation in extension but not sure if its on the foundation in kitchen or off the floor. Will recheck tonight although hard to tell. The other end that you can't see will have a 350mm bearing for steel and this side as picture will seat at 250mm

 

[noseall]

Why wasn't that bit of screed removed (left side) so that the other half of the pillar could sit on solid masonry, or on whatever is below?

Presumably this is a knock-thro' junction and those red perf' bricks visible at floor level are the outer skin and there is another internal skin?

 

[^woody^]

In addition, its craply built, bonded, and the joints are too big for a structural pier

I can't see the relevance of the 350 and 250 bearings either.

I would suspect that the steel could have simply sat on the existing or new wall without a pier

 

[RonnyRaygun]

You would hope that your builder has not built the pier off the floor in the kitchen. Ideally the pier should have been built off the existing foundation with all existing masonry removed to foundation level.

Often piers are used at the end of a wall as it isn't possible to load a pad stone evenly if the existing wall alone is used, bearing in mind that the pad stone cannot also sit on the extension wall.

The 250 and 350mm bearing lengths may have been specified to ensure that the pier / pad stones are axially loaded to prevent any increased local stresses at the top of the pier or under the pad stones.
A smaller eccentricity could also mean a smaller pier could be used.