Rectangular Hollow Section

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Technical Specifications for Rectangular Hollow Sections
Size a x b (mm) Wall Thickness t (mm) Weight kg/mtr Sectional Area cm2 Moment of inertia 1xx cm4 Moment of inertia 1yy cm4 Radius of Gyration 1xx cm Radius of Gyration 1yy cm Modulus of section Zxx cm3 Modulus of section Zyy cm3
30 x 20 1 0.75 0.96 0.6 1.21 0.82 1.12 1.41 1.08
30 x 20 1.2 0.9 1.14 0.73 1.42 0.8 1.11 1.66 1.27
30 x 20 1.5 1.1 1.4 0.89 1.71 0.79 1.1 2.03 1.54
30 x 20 2 1.43 1.82 1.11 2.16 0.78 1.08 2.59 1.94
30 x 20 2.5 1.74 2.22 1.3 2.55 0.75 1.06 4.25 2.18
30 x 20 3 2.04 2.6 1.45 2.89 0.74 1.05 3.56 2.61
30 x 20 1.2 1.23 1.5 3.32 1.59 1.49 1.03 1.66 1.27
30 x 20 1.5 1.54 1.86 4.04 1.93 1.47 1.01 2.02 1.54
40 x 25 2 1.88 2.44 5.17 2.43 1.45 0.99 2.59 1.94
DIMENSIONAL TOLERANCES
Outside Diameter Round Hollow Section Rectangular Hollow Section
Outside Diameter As Per Table 1.5 mm or 1.5%
Wall thickness Light -8  
Weight Medium & heavy 10%
Single + 10-8%
LOTS>150M + 4%

 6%
Straightness Deviation,2% of total length  
Length Mill Lengths (m) + 50 mm-0 mm
Exact Lengths + 6 mm-0 m
  
Squareness of sides
radii of corner
Angular twist
  

90 + 1
<3times wall thickness
2mm + mm per mtr. Max

 

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