Have you ever wondered about the impressive strength and versatility of I-beams in construction? In this blog post, we’ll dive into the world of these essential structural components. As an experienced mechanical engineer, I’ll share insights on the types, specifications, and weight calculations of I-beams. Get ready to discover how these seemingly simple beams play a crucial role in creating sturdy and reliable structures.
I-beams, also known as H-beams or wide flange beams, are structural steel members characterized by their distinctive I-shaped cross-section. This profile consists of two horizontal elements called flanges, connected by a vertical component known as the web. I-beams are widely used in construction and engineering due to their excellent strength-to-weight ratio and versatile load-bearing capabilities.
These beams are typically manufactured through hot rolling, a process that ensures uniform material properties and precise dimensional control. I-beams are available in various sizes and grades, with two main categories:
I-beams excel in resisting bending moments and shear forces, making them ideal for use as primary support members in buildings, bridges, and industrial structures. Their design allows for efficient material distribution, with the flanges primarily resisting bending stresses and the web handling shear forces.
The selection of an appropriate I-beam depends on factors such as required load capacity, span length, and specific project requirements. Engineers often refer to standardized tables and design codes to determine the optimal I-beam size and grade for a given application, ensuring structural integrity and cost-effectiveness.
I-beams are classified into three primary categories: standard I-beams, light I-beams, and wide flange I-beams. This classification is based on the geometric properties and manufacturing processes of the beams.
The categorization of I-beams is further refined based on the ratio of flange width to web height, resulting in four distinct profiles: wide, medium, narrow, and wide flange I-beams. This ratio significantly influences the beam’s load-bearing capacity, torsional resistance, and overall structural performance.
Standard and light I-beams are typically manufactured in heights ranging from 100 mm to 600 mm (10 to 60 centimeters). This range accommodates various structural requirements in construction and engineering applications.
Light I-beams are characterized by their narrow flanges and thin webs, resulting in a lower weight-to-height ratio compared to standard I-beams of equivalent height. This design optimizes material usage while maintaining adequate strength for specific load conditions.
Wide flange I-beams, often referred to as H-beams due to their shape, feature parallel flanges without taper. These beams are renowned for their cost-effectiveness and efficient load distribution. They are produced using a four-high universal rolling mill, which gives rise to their alternative designation as “universal beams” or “universal columns.”
National and international standards, such as ASTM A6/A6M and EN 10365, have been established to regulate the dimensions, tolerances, and mechanical properties of standard and light I-beams. These standards ensure consistency in manufacturing and facilitate the integration of I-beams into structural designs across various industries.
Hot-rolled I-beams, as specified in GB/T 706-2008 for structural steel sections, typically come in lengths ranging from 5 to 19 meters. This standard outlines crucial parameters including dimensional tolerances, cross-sectional geometry, weight specifications, and allowable deviations.
In the steel fabrication industry, I-beams are commonly supplied based on either actual weight or theoretical weight. The industry-standard tolerance for weight deviation between the theoretical and actual weight of an I-beam is tightly controlled, typically falling within a range of -5% to +3%. This tolerance accounts for minor variations in steel density, rolling precision, and other manufacturing factors.
To accurately determine the weight of an I-beam for design, procurement, or logistics purposes, engineers and steel fabricators utilize specialized I-beam weight calculators. These tools incorporate precise dimensional data, material density, and shape factors to provide reliable weight estimations. The calculator below offers a quick and accurate method for determining I-beam weights based on standard profiles and custom dimensions:
When using this calculator, it’s important to consider factors such as:
For critical applications, it’s advisable to consult manufacturer-specific data sheets or perform physical measurements to ensure the most accurate weight determination.
Related Tool: Steel Weight Calculator
To simplify weight calculations, engineers and contractors often refer to standardized I-beam weight charts. These charts typically provide the weight per foot or meter for various beam sizes and profiles.
Here’s a sample I Beam Steel Weight Chart for common sizes (in imperial units):
Weight table of hot rolled ordinary I-beam
Model | Size(mm) | Sectional area | Weight | ||||
h | b | d | t | r1 | cm² | kg/m | |
10 | 100 | 68 | 4.5 | 7.6 | 3.3 | 14.3 | 11.2 |
12.6 | 126 | 74 | 5 | 8.4 | 3.5 | 18.1 | 14.2 |
14 | 140 | 80 | 5.5 | 9.1 | 3.8 | 21.5 | 16.9 |
16 | 160 | 88 | 6 | 9.9 | 4 | 26.1 | 20.5 |
18 | 180 | 94 | 6.5 | 10.7 | 4.3 | 30.6 | 24.1 |
20a | 200 | 100 | 7 | 11.4 | 4.5 | 35.5 | 27.9 |
20b | 200 | 102 | 9 | 11.4 | 4.5 | 39.5 | 31.1 |
22a | 220 | 110 | 7.5 | 12.3 | 4.8 | 42 | 33 |
22b | 220 | 112 | 9.5 | 12.3 | 4.8 | 46.4 | 36.4 |
25a | 250 | 116 | 8 | 13 | 5 | 48.5 | 38.1 |
25b | 250 | 118 | 10 | 13 | 5 | 53.5 | 42 |
28a | 280 | 122 | 8.5 | 13.7 | 5.3 | 55.45 | 43.4 |
28b | 280 | 124 | 10.5 | 13.7 | 5.3 | 61.05 | 47.9 |
32a | 320 | 130 | 9.5 | 15 | 5.8 | 67.05 | 52.7 |
32b | 320 | 132 | 11.5 | 15 | 5.8 | 73.45 | 57.7 |
32c | 320 | 134 | 13.5 | 15 | 5.8 | 79.95 | 62.8 |
36a | 360 | 136 | 10 | 15.8 | 6 | 76.3 | 59.9 |
36b | 360 | 138 | 12 | 15.8 | 6 | 83.5 | 65.6 |
36c | 360 | 140 | 14 | 15.8 | 6 | 90.7 | 71.2 |
40a | 400 | 142 | 10.5 | 16.5 | 6.3 | 86.1 | 67.6 |
40b | 400 | 144 | 12.5 | 16.5 | 6.3 | 94.1 | 73.8 |
40c | 400 | 146 | 14.5 | 16.5 | 6.3 | 102 | 80.1 |
45a | 450 | 150 | 11.5 | 18 | 6.8 | 102 | 80.4 |
45b | 450 | 152 | 13.5 | 18 | 6.8 | 111 | 87.4 |
45c | 450 | 154 | 15.5 | 18 | 6.8 | 120 | 94.5 |
50a | 500 | 158 | 12 | 20 | 7 | 119 | 93.6 |
50b | 500 | 160 | 14 | 20 | 7 | 129 | 101 |
50c | 500 | 162 | 16 | 20 | 7 | 139 | 109 |
56a | 560 | 166 | 12.5 | 21 | 7.3 | 135.25 | 106.2 |
56b | 560 | 168 | 14.5 | 21 | 7.3 | 146.45 | 115 |
56c | 560 | 170 | 16.5 | 21 | 7.3 | 157.85 | 123.9 |
63a | 630 | 176 | 13 | 22 | 7.5 | 154.9 | 121.6 |
63b | 630 | 178 | 15 | 22 | 7.5 | 167.5 | 131.5 |
63c | 630 | 180 | 17 | 22 | 7.5 | 180.1 | 141 |
Weight table of hot rolled light I-beam
Model | Size(mm) | Sectional area | Weight | ||||
h | b | d | t | r1 | cm² | kg/m | |
10 | 100 | 68 | 4.5 | 7.6 | 3.3 | 14.3 | 11.2 |
12.6 | 126 | 74 | 5 | 8.4 | 3.5 | 18.1 | 14.2 |
14 | 140 | 80 | 5.5 | 9.1 | 3.8 | 21.5 | 16.9 |
16 | 160 | 88 | 6 | 9.9 | 4 | 26.1 | 20.5 |
18 | 180 | 94 | 6.5 | 10.7 | 4.3 | 30.6 | 24.1 |
20a | 200 | 100 | 7 | 11.4 | 4.5 | 35.5 | 27.9 |
20b | 200 | 102 | 9 | 11.4 | 4.5 | 39.5 | 31.1 |
22a | 220 | 110 | 7.5 | 12.3 | 4.8 | 42 | 33 |
22b | 220 | 112 | 9.5 | 12.3 | 4.8 | 46.4 | 36.4 |
25a | 250 | 116 | 8 | 13 | 5 | 48.5 | 38.1 |
25b | 250 | 118 | 10 | 13 | 5 | 53.5 | 42 |
28a | 280 | 122 | 8.5 | 13.7 | 5.3 | 55.45 | 43.4 |
28b | 280 | 124 | 10.5 | 13.7 | 5.3 | 61.05 | 47.9 |
32a | 320 | 130 | 9.5 | 15 | 5.8 | 67.05 | 52.7 |
32b | 320 | 132 | 11.5 | 15 | 5.8 | 73.45 | 57.7 |
32c | 320 | 134 | 13.5 | 15 | 5.8 | 79.95 | 62.8 |
36a | 360 | 136 | 10 | 15.8 | 6 | 76.3 | 59.9 |
36b | 360 | 138 | 12 | 15.8 | 6 | 83.5 | 65.6 |
36c | 360 | 140 | 14 | 15.8 | 6 | 90.7 | 71.2 |
40a | 400 | 142 | 10.5 | 16.5 | 6.3 | 86.1 | 67.6 |
40b | 400 | 144 | 12.5 | 16.5 | 6.3 | 94.1 | 73.8 |
40c | 400 | 146 | 14.5 | 16.5 | 6.3 | 102 | 80.1 |
45a | 450 | 150 | 11.5 | 18 | 6.8 | 102 | 80.4 |
45b | 450 | 152 | 13.5 | 18 | 6.8 | 111 | 87.4 |
45c | 450 | 154 | 15.5 | 18 | 6.8 | 120 | 94.5 |
50a | 500 | 158 | 12 | 20 | 7 | 119 | 93.6 |
50b | 500 | 160 | 14 | 20 | 7 | 129 | 101 |
50c | 500 | 162 | 16 | 20 | 7 | 139 | 109 |
56a | 560 | 166 | 12.5 | 21 | 7.3 | 135.25 | 106.2 |
56b | 560 | 168 | 14.5 | 21 | 7.3 | 146.45 | 115 |
56c | 560 | 170 | 16.5 | 21 | 7.3 | 157.85 | 123.9 |
63a | 630 | 176 | 13 | 22 | 7.5 | 154.9 | 121.6 |
63b | 630 | 178 | 15 | 22 | 7.5 | 167.5 | 131.5 |
63c | 630 | 180 | 17 | 22 | 7.5 | 180.1 | 141 |
When using these charts, it’s important to consider:
For precise calculations, especially in critical structural applications, it’s advisable to consult the manufacturer’s specifications or use specialized structural engineering software.
Understanding and accurately calculating I-beam weights is crucial for:
By utilizing I Beam Steel Weight Charts, professionals can streamline their design and construction processes, ensuring efficiency and accuracy in structural steel projects.