I-beam

English

This I-beam is used to support the first floor of a house.

Wide-flange I-beam.

I-beam (plural I-beams)

(engineering) A beam with cross-section shaped like a capital letter I (with serifs top and bottom), used in construction.
(computing, graphical user interface) A cursor shaped like the letter I, usually indicating text that can be edited or selected.
- 1992, Ben Ezzell, Borland C++ 3.0 programming
  In general, the cursor image is the primary concern, with different types used to indicate selected functions such as I-beams or vertical bars for text editing, a pencil for drawing, or a hand with the index finger extended […]

I-shaped beam