What is an IPE beam?
An IPE beam is a rolled steel I-section with parallel flange faces. The cross-section resembles the letter I: two horizontal flanges joined by a vertical web. The IPE beam is one of the most widely used steel beams in construction, for example as a load-bearing beam over a wall opening or as a floor beam.
IPE and INP: the difference
The IPE beam is often mentioned alongside the older INP beam. The difference lies in the flanges:
- IPE — the inner and outer faces of the flange run parallel; the flange is the same thickness throughout. This makes connections and fixings easier.
- INP — the inner face of the flange tapers towards the web. This is the older, “normal-profile” version, found mainly in existing buildings.
Both are designated by a number giving the height in millimetres, for example IPE 200 (200 mm high). Sizes typically run from about 80 to 600 mm in height.
Application
IPE and INP beams carry loads across a span and transfer them to the supports:
- Lintels and beams — over doors, windows and openings.
- Floor and roof beams — as the main load-bearing structure in steel-frame building.
- Steel structures — combined with columns (often HEA or HEB sections).
The correct size follows from a structural calculation based on span and load; always have this determined by a structural engineer. Steel must also be protected against corrosion and, where necessary, against fire.
Related terms
- Steel
- Beam
- I-section
- H-section
- HEA beam, HEB beam
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