What are ISMBs?
ISMBs, or Indian Standard Medium Weight Beams, are a type of structural steel beam used in construction projects. They are commonly used in the construction of buildings, bridges, and other structures due to their strength and durability. ISMBs come in a variety of sizes and weights, making them versatile and adaptable to a wide range of construction needs.
Full Form: The full form of ISMB is Indian Standard Medium Weight Beam.
Understanding the weight and dimension chart
The weight and dimension chart for ISMBs provides important information for construction professionals and engineers. It includes the size, weight, and dimensions of each beam, as well as the cross-sectional area and moment of inertia. This information is crucial for determining the appropriate beam size and placement in a construction project, ensuring the safety and stability of the structure. It is important to consult the chart and follow all safety guidelines when working with ISMBs. List of ISMC weight and dimension chart.
| ISMB Weight Chart Per Meter and Kg | ||||
| DesignationDesignation | Weight per Mtr. in kg. | Depth of Section (mm) | Width of Flange(mm) | Thickness of Flange (mm) |
| ISMB – 100 | 8.9 | 100 | 50 | 7 |
| ISMB – 125 | 13.3 | 125 | 70 | 8 |
| ISMB – 150 | 15 | 150 | 75 | 8 |
| ISMB – 175 | 19.6 | 175 | 85 | 9 |
| ISMB – 200 | 24.2 | 200 | 100 | 10 |
| ISMB – 225 | 31.1 | 225 | 110 | 11.8 |
| ISMB – 250 | 37.3 | 250 | 125 | 12.5 |
| ISMB – 300 | 46 | 300 | 140 | 13.1 |
| ISMB – 350 | 52.4 | 350 | 140 | 14.2 |
| ISMB – 400 | 61.5 | 400 | 140 | 16 |
| ISMB – 450 | 72.4 | 450 | 150 | 17.4 |
| ISMB – 500 | 86.4 | 500 | 180 | 17.2 |
How to use the chart to select the right ISMB for your project
To select the right ISMB for your project, you will need to consider the load requirements and span of the beam. Start by identifying the load requirements for the structure and the span of the beam. Then, consult the weight and dimension chart to find the appropriate ISMB size and weight for your needs. Be sure to also consider the placement and support of the beam, as well as any safety guidelines and regulations that may apply. Always consult with a qualified engineer or construction professional to ensure the safety and stability of your project.
Common applications for ISMBs
ISMBs are commonly used in construction projects for their strength and durability. They are often used in the construction of buildings, bridges, and other structures that require support beams. ISMBs are also used in the manufacturing of heavy machinery and equipment, as well as in the transportation industry for the construction of ships and other large vehicles. With their versatility and strength, ISMBs are a popular choice for a wide range of applications in various industries.
Safety considerations when working with ISMBs.
When working with ISMBs, it is important to prioritize safety. These beams can be heavy and difficult to maneuver, so it is crucial to use proper lifting techniques and equipment. Additionally, workers should wear appropriate personal protective equipment, such as hard hats and steel-toed boots, to prevent injuries from falling objects or accidental impacts. It is also important to follow all safety guidelines and regulations set forth by your employer and local authorities to ensure a safe work environment.
Types of ISMB:
- ISMB 100: This type of ISMB beam has a weight of approximately 11.50 kilograms per meter (kg/m) and is commonly used in construction projects.
- ISMB 125: This type of ISMB beam has a weight of approximately 15.70 kg/m and is larger and heavier than ISMB 100.
- ISMB 150: This type of ISMB beam has a weight of approximately 19.20 kg/m and is larger and heavier than ISMB 125.
- ISMB 175: This type of ISMB beam has a weight of approximately 22.60 kg/m and is larger and heavier than ISMB 150.
- ISMB 200: This type of ISMB beam has a weight of approximately 25.40 kg/m and is larger and heavier than ISMB 175.
- ISMB 250: This type of ISMB beam has a weight of approximately 32.30 kg/m and is larger and heavier than ISMB 200.
- ISMB 300: This type of ISMB beam has a weight of approximately 39.20 kg/m and is larger and heavier than ISMB 250.
- ISMB 350: This type of ISMB beam has a weight of approximately 46.10 kg/m and is larger and heavier than ISMB 300.
- ISMB 400: This type of ISMB beam has a weight of approximately 52.40 kg/m and is larger and heavier than ISMB 350.
- ISMB 450: This type of ISMB beam has a weight of approximately 61.60 kg/m and is larger and heavier than ISMB 400.
- ISMB 500: This type of ISMB beam has a weight of approximately 72.40 kg/m and is larger and heavier than ISMB 450.
These are some examples of the types of ISMB beams available, and there are additional sizes and weights available within the Indian Standard specifications.
Formula and Calculation for ISMB Beams:
ISMB beams are widely used in construction for their load-bearing capabilities. Calculating the weight of an ISMB beam is important for various engineering and design purposes. The weight of an ISMB beam can be determined using the following formula:
Weight (kg/m) = ((D^2 * B) – (d^2 * b)) * L * W
Where:
- D = Depth of the beam (mm)
- B = Width of the flange (mm)
- d = Depth of the web (mm)
- b = Width of the web (mm)
- L = Length of the beam (m)
- W = Density of the material (kg/m^3)
Let’s illustrate this calculation with an example:
Example: Consider an ISMB 200 beam with the following dimensions: Depth of the beam (D) = 200 mm Width of the flange (B) = 100 mm Depth of the web (d) = 180 mm Width of the web (b) = 10 mm Length of the beam (L) = 6 meters Density of the material (W) = 7850 kg/m^3 (assuming mild steel)
Using the formula mentioned above, we can calculate the weight of the ISMB 200 beam:
- Weight (kg/m) = ((D^2 * B) – (d^2 * b)) * L * W
- Weight (kg/m) = ((200^2 * 100) – (180^2 * 10)) * 6 * 7850
- Weight (kg/m) = (40000 * 100) – (32400 * 10)) * 6 * 7850
- Weight (kg/m) = (4000000 – 324000) * 6 * 7850
- Weight (kg/m) = 3676000 * 6 * 7850 Weight (kg/m) = 164.74 kg/m
Therefore, the weight of an ISMB 200 beam with the given dimensions is approximately 164.74 kg/m.
It’s important to note that the above calculation gives the weight per meter of the ISMB beam. If you need to calculate the total weight for a specific length, you can multiply the weight per meter by the length in meters.
Codes and Standards for ISMB Beams
ISMB (Indian Standard Medium Weight Beam) beams are governed by various codes and standards to ensure uniformity, quality, and safety in the construction industry. These codes and standards provide guidelines for the manufacturing, dimensions, tolerances, and mechanical properties of ISMB beams. Below are the important codes and standards applicable to ISMB beams:
IS 808:1989 – Indian Standard for Rolled Steel Channels, ISMB Beams, and Columns
IS 808:1989 is a widely recognized Indian Standard that covers rolled steel channels, ISMB beams, and columns. This standard provides comprehensive guidelines for the manufacturing, dimensions, weight, tolerances, and mechanical properties of ISMB beams. It ensures adherence to specific standards in the production and use of these structural elements.
IS 2062:2011 – Indian Standard for Hot Rolled Medium and High Tensile Structural Steel
IS 2062:2011 is an Indian Standard that sets the requirements for hot-rolled medium and high tensile structural steel, including ISMB beams. This standard specifies the chemical composition, mechanical properties, and dimensional tolerances of the steel used in the manufacturing of ISMB beams. It ensures the quality and strength of the beams for structural applications.
IS 808:1989 – Part 1 and Part 2
IS 808:1989 is further divided into two parts, namely Part 1 and Part 2, which provide additional specifications and guidelines for ISMB beams:
- Part 1: Part 1 of IS 808:1989 deals with dimensions and properties of hot-rolled steel sections, including ISMB beams. It covers the dimensions, sectional properties, and mass properties of different sizes of beams, allowing for accurate design and analysis.
- Part 2: Part 2 of IS 808:1989 focuses on methods for estimating the permissible stresses in steel structures, including ISMB beams. It provides guidance on determining the allowable stress values for various steel sections, aiding in the safe design of structures.
These codes and standards ensure that ISMB beams meet the required specifications, dimensions, and mechanical properties, thereby ensuring the safety and structural integrity of construction projects.