Hi,
I am helping my son convert an old barn into a home workshop. To free up floor space, we need to support the existing timber trusses with steel beams. We are casting foundations for the posts that will support the beams. The beams will be placed under the existing timber beams across the house. The steel beams will be 8 meters long. The load is considered distributed, and at the center, it is 700 kg, which we measured with a pallet jack and a pallet scale. Is there anyone who can calculate the required dimension for an I-beam? Snow load doesn't need to be considered, as it is a metal roof and we are located near the west coast.
Anders
I am helping my son convert an old barn into a home workshop. To free up floor space, we need to support the existing timber trusses with steel beams. We are casting foundations for the posts that will support the beams. The beams will be placed under the existing timber beams across the house. The steel beams will be 8 meters long. The load is considered distributed, and at the center, it is 700 kg, which we measured with a pallet jack and a pallet scale. Is there anyone who can calculate the required dimension for an I-beam? Snow load doesn't need to be considered, as it is a metal roof and we are located near the west coast.
Anders
I don't quite understand the load case.
You mention distributed load, which I can accept considering there are several trusses along the entire length of the beam, but then you state that in the middle, the load is 700kg.
Does each truss exert 700kg on the steel beam?
In that case, how many trusses are there?
You mention distributed load, which I can accept considering there are several trusses along the entire length of the beam, but then you state that in the middle, the load is 700kg.
Does each truss exert 700kg on the steel beam?
In that case, how many trusses are there?
In this case, the choice of beam mostly depends on which deflection can be accepted.
I have calculated with a deflection of a maximum of 35mm in the middle of the beam.
As an additional safety margin, I have also calculated for a 700kg point load in the middle, which is considerably tougher for the beam than a distributed load.
The following beams can handle the above with a maximum deflection of 35mm (including self-weight).
IPE 180, HE160A, and HE140B.
I have calculated with a deflection of a maximum of 35mm in the middle of the beam.
As an additional safety margin, I have also calculated for a 700kg point load in the middle, which is considerably tougher for the beam than a distributed load.
The following beams can handle the above with a maximum deflection of 35mm (including self-weight).
IPE 180, HE160A, and HE140B.