GOST 30245 Rectangular Hollow Sections Structural Steel Pipe For Steel Building Structures
Product Details
structural steel tubing
,cold formed steel tube
Rectangular Hollow Sections GOST 30245Steel bent closed welded square and rectangular section for building
Application:for steel Building Structures.
Manufacture method:Shaping the round tubular section with longitudinal weld(Automatic high frequency welding) and consequent spellerizing to square or rectangular section.
The article sections shall conform to those specified in fingures 1 and 2
Remark: h—Height(width)；b—width；t—wall thickness；R—edge radius；I—Inertia moment；W—resistance moment；i—radius of inertia
h:50-400mm t:4-14mm
Tolerance:
- The maximum deviation of the wall thickness shall conform to the maximum deviation of thickness of the blank metal with a width of 1250mm of normal rolling accuracy E in accordance with GOST 19903.Maximum deviations of thickness shall not apply to the places of bending.
- The maximum deviation of the section height and width shall not exceed:
--+/-1.5mm for a section height (width)of up to 100mm
--+/-2.0mm for a section height(width)exceeding 100mm.
In case of a section with a height (width)of 100 mm and a wall thickness of 7mm,The maximum deviation of the section height (width ) shall not exceed +/-2.0mm
3.The deviation of an angle in a cross-section from 90 °shall not exceed +/-1°30’,In case of sections with a wall thickness from 7 to 14mm,The maximum deviation from 90° shall not exceed +/-2°
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