Angle Iron Hot Formed (equal leg)

 

There are many advantages to constructing with steel: the strength to weight ratio is excellent; metals join easily; efficient shapes are available; etc. These advantages create challenges that are best solved by a good understanding of how the metals actually perform in a structure. Structural steel shapes are suitable for a wide variety of uses. For example they are used in, building frames, roof trusses, floor framing, bench frames, gates, fences, cattle grids, scaffolds, tank stands, television towers, car trailers, rails, etc.

Most structural steel failures occur at connections, where a beam connects to a column, where a joist connects to a beam, etc. The Structural Engineer must design the steel members and give guidelines for the connections. The cold-formed sections are suitable for all types of welding, such as spot welding, seam welding, projection welding, butt and groove welding, plug welding and arc welding. All of these are applicable to both uncoated and zinc coated sections.

Different shapes of structural steel (both hot-rolled and cold-formed) are available with specifications such as: I-beam’s, Z-Shape (half a flange in opposite directions), HSS-Shape (Hollow structural section such as square, rectangular, circular (pipe) and elliptical cross-sections), Equal angle, L-shaped cross-section, Channel ( [-shaped), Tee (T-shaped cross-sections), Rail profile (asymmetrical I-beam), Flanged T-rail, Bar (a piece of metal flat and long), Plate (metal sheets thicker than 6 mm or 1⁄4 in), Open web steel joist.

Some structural steel shapes such as I-beams have a high second moments of area, which can result in stiffness compared to cross-sectional area. It is very important for engineers to have understanding of the material and its limitations.

angels_equal_leg_.png

Angles (equal leg) dimensions and properties
   m                 r1              r2               A  ax                ay                   v1                  v2                
 Designation   
 h*b*t
 kg/m  mm  mm  10^3mm^2  mm  mm  mm  mm
 25x25x3  1.11   3.5  2  0.142  7.21  7.21  10.2  8.77
 5  1.77   3.5  2  0.226  7.98  7.98  11.3  9.10
 30x30x3  1.36   5  2.5  0.174  8.35  8.35  11.8  10.5
 5  2.18   5  2.5  0.278  9.18  9.18  13.0  10.7
 40x40x3  1.87   6  3  0.235  10.7  10.7  15.2  14.0
 4  2.42   6  3  0.308  11.2  11.2  15.8  14.0
 5  2.97   6  3  0.379  11.6  11.6  16.4  14.1
 6  3.52   6  3  0.448  12.0  12.0  17.0  14.3
 45x45x3  2.13   7  3.5  0.268  11.9  11.9  16.7  15.7
 4  2.74   7  3.5  0.349  12.3  12.3  17.4  15.8
 5  3.38   7  3.5  0.430  12.8  12.8  18.1  15.8
 50x50x3  2.37   7  3.5  0.298  13.1  13.1  18.5  17.5
 4  3.06   7  3.5  0.389  13.6  13.6  19.2  17.6
 5  3.77   7  3.5  0.480  14.0  14.0  19.0  17.6
 6  4.47   7  3.5  0.569  14.5  14.5  20.4  17.7
 8  5.82   7  3.5  0.741  15.2  15.2  21.6  18.0
 60x60x4  3.70   8  4  0.471  16.0  16.0  22.6  21.0
 5  4.57   8  4  0.582  16.4  16.4  23.2  21.1
 6  5.42   8  4  0.691  16.9  16.9  23.9  21.1
 8  7.09   8  4  0.903  17.7  17.7  25.0  21.4
 10  8.69   8  4  1.11  18.5  18.5  26.1  21.7
 70x70x6  6.38   9  4.5  0.813  19.3  19.3  27.3  24.6
 8  8.36   9  4.5  1.06  20.1  20.1  28.5  24.8
 10  10.3   9  4.5  1.31  20.9  20.9  29.6  25.1
 80x80x6  7.34  10  5  0.935  21.7  21.7  30.7  28.1
 8  9.63  10  5  1.23  22.6  22.6  31.9  28.3
 10  11.9  10  5  1.51  23.4  23.4  33.0  28.5
 12  14.0  10  5  1.79  24.1  24.1  34.1  28.9
 90x90x6  8.30  11  5.5  1.06  24.1  24.1  34.0  31.5
 8  10.9  11  5.5  1.39  25  25  35.3  31.7
 10  13.4  11  5.5  1.71  25.8  25.8  36.5  31.9
 12  15.9  11  5.5  2.03  26.6  26.6  37.6  32.2
 100x100x8  12.2  12  6  1.55  27.4  27.4  38.7  35.2
 10  15.0  12  6  1.92  28.2  28.2  39.9  35.4
 12  17.8  12  6  2.27  29.0  29.0  41.1  35.7
 15  21.9  12  6  2.79  30.2  30.2  42.7  36.1
 120x120x8  14.7  13  6.5  1.87  32.3  32.3  45.6  42.0
 10  18.2  13  6.5  2.32  33.1  33.1  46.9  42.4
 12  21.6  13  6.5  2.75  34.0  34.0  48.0  42.6
 15  26.6  13  6.5  3.39  35.1  35.1  49.7  43.1
 150x150x10  23.0  16  8  2.93  40.3  40.3  57.1  52.5
 12  27.3  16  8  3.48  41.2  41.2  58.3  52.9
 15  33.8  16  8  4.30  42.5  42.5  60.1  53.3
 18  40.1  16  8  5.10  43.7  43.7  61.7  53.7
 200x200x16  48.5  18  9  6.18  55.2  55.2  78.1  70.9
 18  54.2  18  9  6.91  56.0  56.0  79.3  71.2
 20  59.9  18  9  7.63  56.8  56.8  80.4  71.5
 24  71.1  18  9  9.06  58.4  58.4  82.6  72.1

 

Angles (equal leg) dimensions and properties (continued)
                                                                                                                                   

 

I Ze  r  J 
Designation
h*b*t
10^6mm^4 10^3mm^3  mm               10^3mm^4
                                     About x-x and y-y  
25x25x3  0.008  0.448  7.49  0.476 
5  0.012  0.708  7.30  1.98
30x30x3  0.014  0.649  8.99  0.635
5  0.022  1.04  8.83  2.58
40x40x3  0.035  1.18  12.1  0.882
4  0.045  1.55  12.1  1.92
5  0.054  1.91  12.0  3.56
6  0.063  2.26  11.9  5.92
45x45x3  0.050  1.52  13.7  1.06
4  0.064  1.97  13.6  2.27
5  0.078  2.43  13.5  4.17
50x50x3  0.070  1.89  15.3  1.15
4  0.090  2.46  15.2  2.48
5  0.110  3.05  15.1  4.58
6  0.128  3.61  15.0  7.62
8  0.163  4.68  14.8  17.0
60x60x4  0.158  3.59  18.3  3.07
5  0.194  4.45  18.2  5.64
6  0.228  5.29  18.2  9.36
8  0.292  6.89  18.0  21.0
10  0.349  8.41  17.8  39.2
70x70x6  0.369  7.27  21.3  11.2
8  0.475  9.52  21.1  25.0
10  0.572  11.7  20.9  46.8
80x80x6  0.558  9.57  24.4  13.0
8  0.722  12.6  24.3  29.1
10  0.875  15.4  24.1  54.5
12  1.02  18.2  23.9  91.2
90x90x6  0.803  12.2  27.6  15.0
8  1.04  16.1  27.4  33.3
10  1.27 19.8  27.2  62.4
12  1.48  23.3  27.0  104
100x100x8  1 .45  19.9  30.6  37.6
10  1.77  24.6  30.4  70.3
12  2.07  29.1  30.2  118
15  2.49  35.6  29.8  221
120x120x8  2.55  29.1  36.9  45.4
10  3.13  36.0  36.7  85.1
12  3.68  42.7  36.5  143
15  4.45  52.4  36.2  269
150x150x10  6.24  56.9  46.2  110
12  7.37  67.7  46.0  184
15  8.98  83.5  45.7  347
18  10.5  98.7  45.4  584
200x200x16  23.4  162  61.6  564
18  26.0  181  61.3  790
20  28.5  199  61.1  1070
24  33.3  235  60.6  1800
                                        About u-u  
 25x25x3  0.013  0.714  9.43  0.476
 5  0.019  0.107  9.14  1.98
 30x30x3  0.022  1.05  11.3  0.635
 5  0.034  1.61  11.1  2.58
 40x40x3  0.055  1.93  15.3  0.882
 4  0.071  2.51  15.2  1.92
 5  0.086  3.04  15.1  3.56
 6  0.100  3.53  14.9  5.92
 45x45x3  0.079  2.49  17.2  1.06
 4  0.102  3.20  17.1  2.27
 5  0.124  3.90  17.0  4.17
 50x50x3  0.110  3.12  19.2  1.15
 4  0.142  4.02  19.1  2.48
 5  0.174  4.92  19.0  4.58
 6  0.203  5.75  18.9  7.62
 8  0.257  7.27  18.6  17.0
 60x60x4  0.250  5.90  23.0  3.07
 5  0.307  7.24  23.0  5.64
 6  0.361  8.52  22.9  9.36
 8  0.461  10.9  22.6  21.0
 10  0.551  13.0  22.3  39.2
 70x70x6  0.585  11.8  26.8  11.2
 8  0.753  15.2  26.6  25.0
 10  0.905  18.3  26.3  46.8
80x80x6  0.885  15.6  30.8  13.0
8  1.15  20.3  30.6  29.1
10  1.39  24.5  30.3  54.5
12  1.61  28.4  30.0  91.2
90x90x6  1.27  20.0  34.7  15.0
8  1.66  26.0  34.5  33.3
10  2.01  31.6  34.3  62.4
12  2.34  36.8  34.0  104
100x100x8  2.30  32.5  38.5  37.6
10  2.80  39.6  38.3  70.3
12  3.28  46.3  38.0  118
15  3.93  55.5  37.5  221
120x120x8  4.05  47.8  46.5  45.4
10  4.97  58.6  46.3  85.1
12  5.84  68.8  46.0  143
15  7.05  83.1  45.6  269
150x150x10  9.91  93.4  58.2  110
12  11.7  110  58.0  184
15  14.3  134  57.6  347
18  16.6  157  57.1  584
200x200x16  37.2  263  77.6  564
18  41.3  292  77.3  790
20  45.3  320  77.0  1070
24  52.8  374  76.4  1800
                                          About v-v  
 25x25x3  0.003  0.324  4.83  0.476
 5  0.005  0.462  4.80  1.98
 30x30x3  0.006  0.496  5.81  0.635
 5  0.009  0.706  5.75  2.58
 40x40x3  0.014  0.951  7.84  0.882
 4  0.019  1.17  7.77  1.92
 5  0.023  1.38  7.73  3.56
 6  0.027  1.56  7.70  5.92
 45x45x3  0.021  1.25  8.88  1.06
 4  0.027  1.53  8.76  2.27
 5  0.033  1.80  8.71  4.17
 50x50x3  0.029  1.58  9.92  1.15
 4  0.037  1.94  9.79  2.48
 5  0.046  2.29  9.73  4.58
 6  0.053  2.61  9.68  7.62
 8  0.069  3.19  9.63  17.0
 60x60x4  0.066  2.92  11.8  3.07
 5  0.080  3.45  11.7  5.64
 6  0.094  3.96  11.7  9.36
 8  0.122  4.86  11.6  21.0
 10  0.148  5.67  11.6  39.2
 70x70x6  0.153  5.60  13.7  11.2
 8  0.197  6.92  13.6  25.0
 10  0.240  8.10  13.5  46.8
 80x80x6  0.231  7.55  15.7  13.0
 8  0.299  9.37  15.6  29.1
 10  0.364  11.0  15.5  54.5
 12  0.427  12.5  15.5  91.2
 90x90x6  0.333  9.80  17.8  15.0
 8  0.431  12.2  17.6  33.3
 10  0.526  14.4  17.5  62.4
 12  0.617  16.4  17.4  104
 100x100x8  0.599  15.5  19.6  37.6
 10  0.730  18.3  19.5  70.3
 12  0.857  20.9  19.4  118
 15  1.04  24.4  19.3  221
 120x120x8  1.05  23.1  23.7  45.4
 10  1.29  27.5  23.6  85.1
 12  1.52  31.6  23.5  143
 15  1.85  37.1  23.3  269
 150x150x10  2.58  45.1  29.7  110
 12  3.03  52.0  29.5  184
 15  3.70  61.6  29.3  347
 18  4.35  70.5  29.2  584
 200x200x16  9.60  123  39.4  564
 18  10.7  135  39.3  790
 20  11.7  146  39.2  1070
 24  13.8  167  39.0  1800