Steel Foundation
Steel Foundation
(OP)
Dear Experts,
I'm developing some standart steel structures for industrial buildings, warehouses and farm facilities for serial production aiming to find the fastest way to provide the client with the building ready to use. At this point the steel structures issues are done but occured to me a way to save some extra 10 days in the hole process and that's the point were I do need advices.
I'm thinking about doing the footings also in steel something like a large adequated stiffined base plate to resist the soil pressure with a short collum of adequated lenght and top connections, such assembly will be installed over the botton of excavation with a layer of fast curing Grout over the compacted soil.
We will achieve a plus concerning to the precision of the footings location too.
All the steel will be Corten (ASTM A242 or A588) protected with bi-component epoxy shop primer.
Does anyone of you have ever heard about something alike this "crazy idea" (point of view from some of my local Brazilian collegues)?
Thanks in advance
Fred
I'm developing some standart steel structures for industrial buildings, warehouses and farm facilities for serial production aiming to find the fastest way to provide the client with the building ready to use. At this point the steel structures issues are done but occured to me a way to save some extra 10 days in the hole process and that's the point were I do need advices.
I'm thinking about doing the footings also in steel something like a large adequated stiffined base plate to resist the soil pressure with a short collum of adequated lenght and top connections, such assembly will be installed over the botton of excavation with a layer of fast curing Grout over the compacted soil.
We will achieve a plus concerning to the precision of the footings location too.
All the steel will be Corten (ASTM A242 or A588) protected with bi-component epoxy shop primer.
Does anyone of you have ever heard about something alike this "crazy idea" (point of view from some of my local Brazilian collegues)?
Thanks in advance
Fred






RE: Steel Foundation
One thing you might consider is a shallow driven pile to create a foundation pier. Could be done in wood or steel, then connect your building to it. I don't know your availability of piling contractors, so that might be an issue.
RE: Steel Foundation
RE: Steel Foundation
Ishvaaag the corrosion problem I guess that can be aproached as you suggested and here for steel piles the codes impose a thickness reduction to be aplied at the plates embbebed in soil so I guess that this kind of approach would accetable, what do you think? Concernig to costs, my initial calculations based on a finite element model with the stiffiners (ASTM A242) modeled as shell elements and the botton plate as a membrane (ASTM A588) under uniform pressure leeds me to a resonable steel weight.
Thank you all for the fast reply, and have a nice end of weekend.
Fred
RE: Steel Foundation
RE: Steel Foundation
RE: Steel Foundation
Carl Bauer
www.bauerconsultbotswana.com
RE: Steel Foundation
Calbauer- your idea is very good it will save some steel I'll think about this, and try the analyse the composite structure, maybe with adding some kind of shear stud, over the botton plate, or pieces C sections welded to it due to small thichness of the bottom plate we can achieve an effective composite action. I will also evaluate the magnitude of initial (erection) possible reactions, I guess that your idea will improve the hole model.
Thank you all
fred
RE: Steel Foundation
Carl Bauer
www.bauerconsultbotswana.com
RE: Steel Foundation
RE: Steel Foundation
Why not bolt the column baseplate directly to this floor slab using standard concrete anchors? Then there is no problem with misplaced holding down bolts or possible corrosion of the embedded steelwork.
Mesh reinforcement may be adequate to transfer the column reaction over a large enough area of slab to achieve the allowable bearing pressure.
RE: Steel Foundation
The bottom plate work as a menbrane so I dont need heavy plates they are about 3.00mm thick and that why stud bolts become a problem.
---> SRM Your idea is good, but there are some issues to consider concerning to the soil's top layer adequation and further, here is a common practice to cast the floor slabs after the copletion of the roof assembly, including sheating due to weather matters.
Anyway thank you all for the advices.
RE: Steel Foundation
RE: Steel Foundation
1) place preparatory layer of concrete
2) place there precast rectangular footings with baseplate placed
3) weld column
4) place slab on the ground.
the advantage is you get prefabricated, no contact ground with steel remains, and you gain neccessary depth, thickness and weight in the foundations.
For the precast part even lightweight concrete should be considered for portability.
RE: Steel Foundation
Ishvaaag ---> I will take your advice and start this way, but as I'm a steel structures fabricator I want to sell my product, but before selling this I will, as adviced, make some real models and try to test them in house, maybe using them in a warehouse that we acctualy need to build for ourselves.
Once more thank you very much,
Fred
Fred