Brick work upto DPC and steelwork

[Maplash]

Hi

 

I have the designs for the timber build with some steelwork which is designed to have the posts down to the concrete foundations which are 750mm below DPC. 

 

My question is should I get these installed prior or post the brick and block work for the foundations up to DPC.

 

I have a brickie arranged to do up to DPC level but assume I just need to make sure he leaves a gap for where the posts and base plate will be for the steel work but wanted to check before I do something stupid. 

 

I know the ideal might be to do the steel work first but it may take a bit of time to arrange for someone to fit the steels so was hoping to crack on with the brick work first. 

 

Hopefully the attached make sense but it is a left side and rear extension with the thicker black lines on the screenshot photo being the original structure.

 

Thanks all for any views. 

REGS GROUND_2025.pdf

[Nickfromwales]

If defo get the steels in before. Too many variables to do this ‘the other way around’. 
 

If you hit the new brickwork with steel you’ll damage it easily too. 

[saveasteading]

22 minutes ago, Maplash said:

750mm below DPC. 

That's a long way down. You have to cast bolts in, or drill and glue to precise positions. Then fit a base plate over them to level, and fit the nuts. 

That isn't easy and is  worse with other obstructions.

 

Can you raise the pad to slab level in concrete?

[saveasteading]

5 minutes ago, saveasteading said:

Can you raise the pad to slab level in concrete?

It could be formed in brick or block, with tie bars, and infilled. This became my standard detail on hundreds of bases. If you have to set it below floor level to conceal the bolts,  then allow for that.

This assumes simple vertical loading, otherwise more thought is required.

[G and J]

1 hour ago, saveasteading said:

It could be formed in brick or block, with tie bars, and infilled. This became my standard detail on hundreds of bases. If you have to set it below floor level to conceal the bolts,  then allow for that.

This assumes simple vertical loading, otherwise more thought is required.

Is this what they call a wind frame?  If not presumably then it’s predominantly to resist the weight of that which rests above it.  
 

If it is a wind frame then would the lateral forces impose fairly heavy requirements on the plinths?

[saveasteading]

54 minutes ago, G and J said:

impose fairly heavy requirements on the plinths?

We dont know the circumstances. Anyway, nothing that a few bars would not resolve...but needs calculations.

 

It's just not easy getting 750mm down with a spanner, or even getting the nuts on the threads.

I once took a building down and found there were no nuts. I suspect many more elsewhere are not tight.

[Canski]

When the brickies or engineer have set out the walls drop the steels in then. They can then be built in.  This will ensure that they are in the correct place in relationship to the building.