Shopping for an I-beam
An I-beam can go by many different names:
- I-beam because it looks like a capital “I” from one angle
- H-beam because it also looks like a capital “H” when it is on its side
- W-beam, which stands for “wide flange”
- Universal Beam because of its universal application for construction
- Rolled Steel Joint
- Double-T, again because it resembles two capital “T” letters put together
Using Steel I-Beams
The benefit of a steel beam is that the design can protect against both shear forces and bending. The web of the beam is what can protect against the shear forces, while the flanges are efficient at protecting against bending.
Because of the way they are built, steel I-beams are especially effective at spanning distances, for example when you are constructing a large building, creating a road, walkway, or other transportation application, or building platforms that need to be structurally sound. They are often used a reinforcement for concrete, and when used together these two materials make a very strong combination.
To find the right size of I-beams, you need to know several different things about the project, such as how you plan to use it, what size you need, and what kind of reinforcement is appropriate. There are tables that can provide you with information about available sizes to help you get the right beams, but there is more than just the size. You also need to know:
- Deflection (minimizing deformation)
- Vibration (preventing vibrations in sensitive construction projects)
- Yield stress and lateral torsional buckling (preventing bending failure from either of these issues)
- Local yield (for concentrated loads)
- Shear failure
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