Foundations for steel framed workshop?

[Brad93]

Columns on piers (pads).
Concrete the floor after you know your grade.
No bolts or baseplates protruding from the floor. Easier to sweep up and nothing to trip on

 

[Brad93]

Don't trust or have any faith in planning!

We want to knock down out garage plus attached outbuildings, then knock down a separate workshop and rebuild bigger

Told us we could do the garage under permitted development... so we knocked it down... now they changed their mind and said we can't rebuild the garage because its too big... even tho it's the sane size of the stuff it's replacing.

We've had this. Still no building where a whacking great concrete sectional garage sat. Roughly 5m x 15m.

Beware anything from the planning department that's not in writing on headed paper.

 

[8ob]

I laid a base for a steel framed building a few years ago, that was basically a raft with the stanchion bases all cast in as one. The reobars for the pits dug for the stanchions were tied in with the raft reinforcing mesh. That was to building regs.
It’s worth spending time on the base and getting it laid out so that the side sheets of the building are tight against the side of the slab and that they sail past it by at least 100mm. With a bit of fannying about you can even cast in the bolts for the baseplates.

Bob

 

[Agrismith]

I laid a base for a steel framed building a few years ago, that was basically a raft with the stanchion bases all cast in as one. The reobars for the pits dug for the stanchions were tied in with the raft reinforcing mesh. That was to building regs.
It’s worth spending time on the base and getting it laid out so that the side sheets of the building are tight against the side of the slab and that they sail past it by at least 100mm.

Bob

View attachment 524086View attachment 524087View attachment 524088

Only problem in this instance would be the loss of 200mm internal head height to stay within permitted development.
A dwarf wall between the columns would achieve the same level of waterproofing but retain the 200mm internal head room.

 

[Bobupndown]

My 8x12m steel framed garage / workshop is bolted down to a 6" concrete base.

 

[Hooflungdung]

My 8x12m steel framed garage / workshop is bolted down to a 6" concrete base.View attachment 524090

So, that’s a simple reinforced concrete slab? No pads under the columns and no thickening around the perimeter?

 

[Bobupndown]

So, that’s a simple reinforced concrete slab? No pads under the columns and no thickening around the perimeter?

Yep.