I-beam

Profile steel refers to a product group from the material steel as well as individual rod-shaped members ( " steel beam " ) from this group. Shape is a rolled, drawn or pressed into a defined shape steel having a cross-section over its entire length is the same.

Steel profile is a designation both of the component itself and its respective cross section. A steel profile can be composed, then it is welded or screwed (formerly also riveted ). Often these today at standardized cross-sections caused by hot rolling. The upper and lower cross member of a steel profile is called the flange or belt. The connecting, vertical central part of the middle part is called the web.

Common profiles

  • I-section (double - T- carrier ) according to DIN 1025 Narrow I-beam with inclined inner surfaces of the flanges (INP ) according to DIN 1025-1
  • Mean I-section with parallel inner surfaces of the flanges (IPE series) according to DIN 1025-5
  • Wide flange beams Lightweight design ( ipBL or HEA series) according to DIN 1025-3
  • Standard version (IPB or HEB series) according to DIN 1025-2
  • Reinforced construction ( IPBv or HEM- series ) according to DIN 1025-4
  • U-section with the inclined inner surfaces of the flanges (UNP range) in accordance with DIN 1026-1
  • U-section with parallel inner surfaces of the flanges ( UPE series or EAP series) according to DIN 1026-2
  • T-bar ( T-bar )
  • TH profile ( Toussaint - Heintzmann profile for the mines)
  • Z- profile
  • L- profile ( angle brackets ) equal length flanges, isosceles
  • Different long flanges, ungleichschenkelig

T- carrier

Z- carrier

L- carrier

TH profile

  • Holland Profile
  • Round and square tube
  • Bulkhead heavy sheet piling ( Double T )
  • Light sheet piling ( Larssenprofil, Z - profile )

All of these profiles is common that for them in the standard not only the shape is precisely defined, but also other cross-section values ​​for the static strength and deformation calculation:

  • Circumference in cm
  • Area of ​​the cross -section in cm2
  • Weight in kg / m
  • Position of the two main axes, and gravity of the centroid of the cross section
  • Static moment about the two main focal axes in cm3
  • Section modulus in cm3
  • Axial area moment of inertia in cm4
  • Surface centrifugal at point-symmetric cross-sections in cm4
  • Polar section modulus in cm3
  • Polar area moment of inertia in cm4
  • Location of the shear center in asymmetric cross sections in cm
  • Wölbwiderstandsmoment in cm6

The names of these variables are taken from the physics of the rotating body, only in this case instead of a ground surface shall prevail. Thus, in analogy unit apply to the moment of inertia and its unit kg · cm2 for the area moment of inertia × cm2 cm2 = cm4.

The area moment of inertia and Flächenzentrifugalmomente can be converted to other than the main focal axes of the cross section with the help of the tensor calculus. Since the necessary formulas are cumbersome and error-prone, one uses for it also a drawing aid, the Mohr's circle of inertia.

246848
de