Steel Beam Embedded in Mat Foundation
Steel Beam Embedded in Mat Foundation
(OP)
I have been asked to designed a small mat foundation for a laser cutter feeder rack. The manufacturer had a recommended detail which incorporated an embeded steel beam into a thickened portion on either side of the mat. This allows them to make the attachemnt to the foundation easier. The details which they have provided happen to be for a unit that is 20 kips lighter than the one I am working on which has a total weight of 120 kips. Thier details show a series of various sized stirrups placed around the beam. Can anyone recommend a good approach for considering the hybrid beam and mat design? I would assume that the full depth of the slab can be considered for shear since the top flange of the beam is going to be flush with the top of the mat and concrete will completely fill the space between the flanges. I was then planning to consider only the portion remaining below the beam for bending perpendicular to the beam. Do this sound reasonable?
I appreciate any thoughts.
Thanks
I appreciate any thoughts.
Thanks






RE: Steel Beam Embedded in Mat Foundation
An alternative is to reinforce the mat foundation as normal and have a length of flat plate (say 100x12PL), flush with the foundation surface, with 'tangs' to anchor it into the concrete.
RE: Steel Beam Embedded in Mat Foundation
RE: Steel Beam Embedded in Mat Foundation
If you are going to do it as they have suggested, you are going to need holes drilled in the flange to allow the air to escape, minimizing the voids in the concrete. Typically, I do it as dbuzz has suggested and use Nelson Studs on the plate. Different plate size as well, but same idea. Usually you are just providing a surface for them to weld their equipment on.
Also, if it has any dynamic loading, make sure you have enough mass of concrete to dampen it. Typically, this is 3x the weight of the equipment.
Chip
RE: Steel Beam Embedded in Mat Foundation
RE: Steel Beam Embedded in Mat Foundation