GOST 26020-83

• gost-26020-83.pdf (279.64 KiB)
  ГОСТ 26020-83

GOST 26020−83 I-Beams steel hot rolled with parallel flanges. Assortment

GOST 26020−83

Group B22

INTERSTATE STANDARD

THE HOT-ROLLED STEEL I-BEAMS WITH PARALLEL FLANGE EDGES

Assortment

Hot-rolled steel I-beam with parallel flange edges. Dimensions

ISS 77.140.70
OKP 09 2500

Date of introduction 1986−01−01

Resolution of the USSR State Committee for standards from December 17, 1983 N 6095 date of introduction is established 01.01.86

Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)

REPRINTING. October 2012

1. This standard applies to hot-rolled steel I-beams with parallel flanges height from 100 mm to 1000 mm and the width of the shelves from 55 to 400 mm.

2. The ratio of the size and conditions of application of beams are divided into types:

B — normal beams;

Sh — h-beams;

To — column beams.

3. Cross section I-beams must match what is specified on the devil.1.

The symbol to the drawing and table.1:

 — the height of the I-beam;  — width shelves;  — wall thickness;  — thickness of the shelf;  — radius;  — moment of inertia; moment resistance;  — statistical* the time of polyacene;  — radius of gyration

________________
* The text of the document matches the original. — Note the manufacturer’s database.

Damn.1

4. The sizes of I-beams, the cross-sectional area, linear density and reference values are given in table.1.

Table 1

Notes:

1. The cross-sectional area, reference values, and the linear density calculated based on nominal sizes. The density of steel is taken equal to 7,85х10kg/m.

2. The radius specified on the devil.1, are given for construction of caliber rolls.

Damn.2 tolerances for size and geometric form of I-beams

5. Tolerances for size and geometric form of I-beams (Fig.1 and 2) shall not exceed the values given in table.2.

Legend

 — shortened the width of the flange; is the width of an elongated flange; a misalignment of the shelf; the curvature of the wall height section

Damn.2

Table 2

Note. In coordination with the consumer the curvature of the profile in the vertical and horizontal planes shall not exceed 0,001for 310 mm.

6. Beams in accordance with the order made in length from 6 to 24 m:

the measured length;

measuring length to the segment;

multiple of gauging length;

multiple of gauging length with the cut;

of random length.

6.1. Cut are considered to be beams with a length of not less than:

3 m — for sizes of sections with a linear density of 20 kg/m;

4 m — for sizes of sections with linear densities of 20 kg/m.

6.2. The I-beams to length with the cut and multiple lengths with the cut segments are allowed in the amount of:

up to 5% of the batch weight for the sizes of sections with a linear density of 20 kg/m;

up to 8% of the batch weight for the sizes of sections with a linear density of more than 20 to 50 kg/m;

up to 12% of the batch weight for the sizes of sections with linear densities of over 50 to 150 kg/m;

up to 20% of the batch weight for the sizes of sections with a linear density of more than 150 kg/m.

6.3. It is possible to manufacture I-beams of limited length within off-gage.

7. Maximum deviations along the length of the profiles dimensional and multiple lengths shall not exceed the values given in table.3.

Table 3

8. Cut end Squareness, mm should take the length of the I-beams limit deflection to length.

As the length of the I-beam is defined as the maximum length of the I-beam is conventionally cut with the ends perpendicular to the longitudinal axis.

9. The surface of the blunting of the corners of the shelves should be convex without ledges. The radius of the blunting is not more than 0.2 but not more than 3 mm.

10. Dimension check is carried out at a minimum distance of 500 mm from the end of the profile.

The height profile is measured along the axis .