GB/T 11263 H Beam Steel

Rail & Fittings, Steel Rail

GB/T 11263 H Beam Steel

H-Beam Steel (also called H-section steel or wide flange beam) is a structural steel profile with an “H”-shaped cross-section, consisting of two parallel flanges (horizontal plates) connected by a web (vertical plate). It is widely use in construction, bridges, industrial frameworks, and heavy-load structures due to its high strength-to-weight ratio and excellent load-bearing capacity.

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Symbol Description

Allowable Deviation and Application

Symbol Description

H-Height;

B-Width;

t₁–Thickness of the abdominal plate;

t₂–Wing edge thickness;

r–radius of circle;

X-X — horizontal axis of gravity;

Y-Y — vertical axis of gravity.

H-shaped steel size, shape and allowable deviation(GB/T 11263—2024)

Project				Allowable Deviation	Graphic
Height H		H<400		±2. 0
		400≤H<600		±3. 0
		600≤H<1 000		±4. 0
		1 000≤H<1 200		±5. 0
		H≥1 200		±6. 0
Width B		B<100		±2. 0
		100≤B<200		±2. 5
		200≤B<400		±3. 0
		400≤B<500		±4. 0
		B≥500		±5. 0
Thickness	t1	t1<5		±0. 5
		5≤t1<16		±0. 7
		16≤t1<25		±1. 0
		25≤t1<40		±1. 5
		40≤t1<60		±2. 0
		t1 ≥60		±3. 0
	t2	t2<5		±0. 7
		5≤t2<16		±1. 0
		16≤t2<25		±1. 5
		25≤t2<40		±1. 7
		40≤t2<60		±2. 0
		t2 ≥60		±4. 0
Length		≤7 m		+60 0	—
		>7 m		When the length is increased by 1m or less than 1m, the positive deviation shall be added by 5mm on the above basis
Eave slope T perhaps T’		H≤300	B≤150	≤1. 5
			B>150	<1. 0%B
		H>300	B≤125	≤1. 5
			B>125	≤1. 2%B

Dimensions, shapes and allowable deviations of H-shaped steel (continued)(GB/T 11263—2024)

Unit:mm

Project

Allowable Deviation

Graphic

Bending

(For large bending up and down, left and right)

H≤300

No more than 0.15% of the length

H>300

No more than 0.10% of the length

Central Deviation

B≤200

H≤300

≤2. 5

H>300

≤3. 5

200<B≤450

H≤1 000

≤3. 5

H>1 000

≤4. 0

B>450

—

≤5. 0

The abdominal panel is bent

H<400

≤2. 0

400≤H<600

≤2. 5

H≥600

≤3. 0

The belly panel is wavy

Δt1

H<400

≤2. 0

400≤H<600

≤2. 5

600≤H<1 000

≤3. 0

H≥1 000

≤3. 5

Dimensions, shapes and allowable deviations of H-shaped steel (continued)(GB/T 11263—2024)

Unit:mm

Project			Allowable Deviation	Graphic
The wing is bent F	B≤400		≤1. 5
	B>400		≤2. 5
End face slope E and E’	E	H≤200	≤3. 0
		H>200	≤1. 6%H
	E’	B≤200	≤3. 0
		B>200	≤1. 6%B
Cylindrical passivation of wing end			The diameter should not be equal 0. 18t2 bar passed
Note 1: The size and shape deviation classification is based on the nominal size of the section. Note 2: The bend is measured along the end of the flange. Note 3: “D” is the diameter of the round rod.