Easily calculate the weight of A36 steel based on its dimensions and shape.
Plate
Sheet
Round Bar
Square Bar
Angle (L-Shape)
Channel (C-Shape)
I-Beam (W-Shape)
Select the cross-sectional shape of your A36 steel.
Calculation Results
—
Volume: —
Steel Density: —
Material Area: —
Formula Used: Weight = Volume × Density. Volume is calculated based on the steel shape and dimensions provided.
Weight vs. Dimensions
Weight (kg)Density (kg/m³)
A36 Steel Properties & Conversion Factors
Property
Value
Unit
Density of A36 Steel
7850
kg/m³
Imperial Density (approx)
0.2837
lb/in³
Length Conversion
1
meter = 1000 mm = 3.281 ft = 39.37 in
Area Conversion
1
m² = 10,000 cm² = 1550 in²
Volume Conversion
1
m³ = 1,000,000 cm³ = 61024 in³
What is A36 Steel?
A36 steel is a standard structural steel specification widely used in construction, fabrication, and general engineering applications. It is a carbon structural steel known for its excellent combination of strength, ductility, weldability, and affordability. The "36" in A36 refers to its minimum yield strength of 36,000 pounds per square inch (psi), which is equivalent to 250 megapascals (MPa).
A36 steel is a versatile material, making it a go-to choice for a wide array of projects. Its composition typically includes carbon, manganese, phosphorus, and sulfur, with specific limits to ensure predictable performance. This material is readily available in various forms such as plates, sheets, bars, structural shapes (like I-beams and channels), and pipes, making it adaptable to diverse design requirements. Understanding the properties and how to calculate the weight of A36 steel is crucial for material estimation, cost analysis, and structural design.
Who Should Use the A36 Steel Weight Calculator?
The A36 steel weight calculator is an indispensable tool for a broad spectrum of professionals and individuals involved with steel materials. This includes:
Structural Engineers: To estimate the dead load of steel components in their designs, crucial for structural integrity and safety calculations.
Fabricators and Manufacturers: For accurate material ordering, inventory management, and project cost estimation. Knowing the exact weight helps in procurement and optimizing material usage.
Contractors and Builders: To budget for steel materials, plan logistics for transportation and installation, and ensure project profitability.
Architects: To understand the physical properties of materials they specify, influencing design choices and aesthetic considerations.
Students and Educators: For learning about material properties, engineering principles, and practical applications in a hands-on way.
DIY Enthusiasts: For smaller projects where precise material quantities and costs are important.
Common Misconceptions About A36 Steel
One common misconception is that A36 steel is the strongest or highest-grade steel available. While it is a robust structural steel, there are numerous other steel alloys with significantly higher tensile and yield strengths designed for more demanding applications. Another misconception is that all steel has the same density; in reality, different steel alloys can have slightly varying densities, though A36's density is a standard value used for most calculations.
People sometimes assume that specifying "steel" is enough for engineering purposes. However, different steel grades (like A36, A572, A992, stainless steels, etc.) have distinct mechanical properties, chemical compositions, and price points. Using the correct grade specification, like A36, is essential for performance and compliance. This calculator helps quantify the material, but proper specification based on engineering requirements remains paramount.
A36 Steel Weight Formula and Mathematical Explanation
Calculating the weight of any material, including A36 steel, is fundamentally a matter of determining its volume and multiplying it by its density. The formula is straightforward:
Weight = Volume × Density
Step-by-Step Calculation
Determine the Volume: This is the most variable part, as it depends entirely on the shape and dimensions of the steel piece. For simple shapes like plates or bars, it's a direct length × width × thickness or length × cross-sectional area. For complex structural shapes like I-beams or channels, standard geometric formulas or pre-defined section properties are used.
Identify the Density: The density of A36 steel is a standard physical property. The commonly accepted value is approximately 7850 kilograms per cubic meter (kg/m³). This value is consistent across most A36 steel products regardless of their shape.
Multiply Volume by Density: Once you have the volume (in cubic meters) and the density (in kg/m³), you multiply these two figures to get the weight in kilograms. If other units are used for dimensions, conversions are necessary before multiplication.
Variable Explanations
Volume (V): The amount of space occupied by the steel object. This is calculated based on the shape and its linear dimensions (length, width, height, diameter, etc.). Units typically need to be consistent, such as cubic meters (m³), cubic centimeters (cm³), or cubic inches (in³).
Density (ρ): The mass of the material per unit volume. For A36 steel, the standard density is approximately 7850 kg/m³. This value is crucial for converting geometric volume into mass (weight). Units are typically kg/m³ or lb/in³.
Weight (W): The final calculated mass of the A36 steel component. Units will be kilograms (kg) or pounds (lb), depending on the units used for volume and density.
Example 1: Calculating the Weight of an A36 Steel Plate
A construction company needs to order an A36 steel plate for a structural platform. The plate dimensions are 2 meters long, 1 meter wide, and 10 millimeters thick.
Inputs:
Steel Shape: Plate
Length: 2 meters
Width: 1 meter
Thickness: 0.01 meters (10 mm converted to meters)
Calculation:
Volume: Length × Width × Thickness = 2 m × 1 m × 0.01 m = 0.02 m³
Density: 7850 kg/m³ (standard for A36 steel)
Weight: Volume × Density = 0.02 m³ × 7850 kg/m³ = 157 kg
Result Interpretation:
The A36 steel plate weighs 157 kg. This weight is crucial for ordering the correct amount of material, planning transportation (e.g., ensuring the vehicle can handle the load), and calculating the total project material costs. This information also feeds into structural load calculations.
Example 2: Calculating the Weight of an A36 Steel Round Bar
A machine shop requires an A36 steel round bar for manufacturing components. The bar has a diameter of 50 millimeters and a length of 3 meters.
Inputs:
Steel Shape: Round Bar
Diameter: 0.05 meters (50 mm converted to meters)
Length: 3 meters
Calculation:
Radius: Diameter / 2 = 0.05 m / 2 = 0.025 m
Volume: π × Radius² × Length = π × (0.025 m)² × 3 m ≈ 3.14159 × 0.000625 m² × 3 m ≈ 0.00589 m³
Density: 7850 kg/m³
Weight: Volume × Density ≈ 0.00589 m³ × 7850 kg/m³ ≈ 46.25 kg
Result Interpretation:
The A36 steel round bar weighs approximately 46.25 kg. This calculation helps the shop owner determine the cost of the raw material, manage inventory, and estimate the machining time and tooling requirements. This is a key step in accurate job costing for custom metal fabrication.
How to Use This A36 Steel Weight Calculator
Using our A36 Steel Weight Calculator is designed to be simple and efficient, providing accurate results in seconds. Follow these steps:
Step-by-Step Instructions
Select Steel Shape: Choose the specific shape of your A36 steel component from the dropdown menu (e.g., Plate, Round Bar, I-Beam).
Enter Dimensions: Based on the selected shape, the calculator will prompt you to enter the relevant dimensions. Ensure you use consistent units. The calculator defaults to metric units (meters for length, width, thickness, diameter). If your measurements are in millimeters (mm), remember to convert them to meters by dividing by 1000 (e.g., 10 mm = 0.01 m).
Click 'Calculate Weight': Once all dimensions are entered, click the "Calculate Weight" button.
How to Read Results
Upon clicking "Calculate Weight," you will see the following results:
Primary Highlighted Result (Main Result): This is the total calculated weight of your A36 steel component in kilograms (kg). It's prominently displayed in a large, bold font.
Intermediate Values:
Volume: Displays the calculated volume of the steel in cubic meters (m³).
Steel Density: Shows the standard density of A36 steel used in the calculation (7850 kg/m³).
Material Area: For certain shapes, this might show the cross-sectional area or surface area, useful for other engineering calculations.
Formula Explanation: A brief description of the fundamental formula used (Weight = Volume × Density) for clarity.
Chart: A visual representation showing how weight scales with dimensions for a specific shape, helping to understand material usage.
Table: Provides key properties and conversion factors for A36 steel for reference.
Decision-Making Guidance
The weight calculated by this tool is essential for several key decisions:
Procurement: Accurately order the required quantity of A36 steel, avoiding under or over-ordering.
Budgeting: Estimate material costs more precisely, factoring in the price per kilogram or ton.
Logistics: Plan for transportation and handling, ensuring appropriate equipment and safety measures are in place based on the total weight.
Structural Design: Input the calculated weight as dead load into structural analysis software or calculations.
Inventory Management: Track the amount of steel on hand for various projects.
Use the 'Copy Results' button to easily transfer the calculated data to spreadsheets, reports, or other documents.
Key Factors That Affect A36 Steel Weight Calculations
While the core formula (Weight = Volume × Density) is simple, several factors influence the accuracy and practical application of the calculated weight for A36 steel:
Accuracy of Dimensions:
The most significant factor. Any error in measuring length, width, thickness, diameter, or other shape-specific dimensions will directly translate into an incorrect weight calculation. This is especially critical for fabrication where precise fits are required. Small errors in decimal places can lead to significant weight discrepancies over large quantities.
Consistency of Density:
While A36 steel has a standard density of ~7850 kg/m³, minor variations can occur due to manufacturing processes or slight differences in chemical composition. For most structural applications, the standard value is sufficient. However, for highly sensitive applications, knowing the specific mill's certified density might be necessary.
Material Tolerances:
Steel mills produce materials within specified tolerance limits (e.g., ASTM A6/A6M for structural steel). This means a plate designated as 10mm thick might actually be 9.5mm or 10.5mm. These variations, though usually small, can affect the final weight. The calculator uses nominal dimensions, so the actual weight may vary slightly based on manufacturing tolerances.
Unit Conversions:
Mixing units (e.g., entering thickness in mm while length is in meters) is a common source of error. Always ensure all input dimensions are converted to a single, consistent unit system (like meters) before calculating volume. This calculator is designed to expect metric inputs (or perform conversions internally), but user error during manual input is still possible.
Shape Complexity & Calculation Method:
For standard shapes like plates and bars, the volume calculation is direct. However, for complex profiles like fabricated box sections or custom shapes, the volume calculation becomes more intricate. Standard engineering practices and software are often needed to accurately determine the volume of such components. The calculator supports common structural shapes, but highly custom designs require specific analysis.
Internal Features (Holes, Cuts):
The calculator typically calculates the weight of a solid, continuous piece of steel. If the component has significant holes, cutouts, or welded attachments, the actual weight will be less than the calculated value. Subtracting the volume of removed material is necessary for precise weight determination in such cases.
Waste Material (Scrap):
When ordering materials like plates or bars, you often purchase slightly longer lengths than needed to account for cutting errors or preparation. This "waste" material contributes to the total purchased weight but isn't part of the final component. It's important to distinguish between the weight of the finished part and the weight of the raw material purchased.
Frequently Asked Questions (FAQ)
What is the standard density of A36 steel?
The standard density of A36 steel is approximately 7850 kilograms per cubic meter (kg/m³). This value is widely used for weight calculations in engineering and fabrication.
Can I use this calculator for other steel grades like A572 or stainless steel?
This calculator is specifically calibrated for A36 steel, using its standard density. While the formula (Weight = Volume × Density) remains the same, different steel grades have slightly different densities. For other grades, you would need to adjust the density value used in the calculation.
What units should I use for the dimensions?
The calculator is designed to work with metric units. It's best to enter dimensions in meters (m). If you have measurements in millimeters (mm), divide by 1000 to convert them to meters (e.g., 50 mm = 0.05 m).
How accurate are the results?
The accuracy depends primarily on the precision of the input dimensions and the standard density value used. For most common applications, the results are highly accurate. However, actual weight may vary slightly due to manufacturing tolerances allowed by standards like ASTM A6.
What if my steel piece has holes or cutouts?
This calculator determines the weight of a solid, continuous piece of steel based on its overall dimensions. For components with holes or cutouts, you would need to calculate the volume of the removed material and subtract it from the total volume before calculating the final weight.
Does A36 steel have a specific magnetic property?
A36 steel is ferromagnetic, like most carbon steels. Its magnetic properties are typical for structural steels and are generally not a primary consideration for weight calculations but can be relevant in specific applications like electromagnetics or structural shielding.
How does A36 steel compare to mild steel?
A36 steel is often referred to as a type of mild steel. It has a minimum yield strength of 36,000 psi (250 MPa), which is higher than some basic mild steel grades. It's a very common and cost-effective structural mild steel.
Can I calculate the weight in pounds or tons?
This calculator provides results in kilograms (kg). You can easily convert kilograms to pounds (1 kg ≈ 2.20462 lbs) or tons (1 kg ≈ 0.00110231 tons) using a standard conversion factor or an online converter.
In-depth technical specifications, chemical composition, and mechanical properties of A36 steel.
var densityA36 = 7850; // kg/m³
function getInputValue(id) {
var inputElement = document.getElementById(id);
if (!inputElement) return null;
var value = parseFloat(inputElement.value);
return isNaN(value) ? null : value;
}
function setHelperText(id, text) {
var smallElement = document.querySelector('#' + id + ' + small');
if (smallElement) {
smallElement.textContent = text;
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function showErrorMessage(id, message) {
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errorElement.style.display = 'none';
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var inputElement = document.getElementById(id);
if (inputElement) {
inputElement.style.borderColor = '#ccc';
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}
function updateInputFields() {
var shape = document.getElementById('steelShape').value;
var html = ";
switch (shape) {
case 'plate':
case 'sheet':
html = `
Enter length in meters (m). Example: 2
Enter width in meters (m). Example: 1
Enter thickness in meters (m). Example: 0.01 (for 10mm)
`;
break;
case 'roundBar':
html = `
Enter diameter in meters (m). Example: 0.05 (for 50mm)
Enter length in meters (m). Example: 3
`;
break;
case 'squareBar':
html = `
Enter side length in meters (m). Example: 0.05 (for 50mm)
Enter length in meters (m). Example: 3
`;
break;
case 'angle':
html = `
Enter leg length in meters (m). Example: 0.05 (for 50mm)
Enter leg length in meters (m). Example: 0.05 (for 50mm)
Enter thickness in meters (m). Example: 0.005 (for 5mm)
Enter length in meters (m). Example: 6
`;
break;
case 'channel':
html = `
Enter height in meters (m). Example: 0.1 (for 100mm)
Enter width in meters (m). Example: 0.05 (for 50mm)
Enter thickness in meters (m). Example: 0.005 (for 5mm)
Enter length in meters (m). Example: 6
`;
break;
case 'iBeam':
html = `
Enter depth in meters (m). Example: 0.2 (for 200mm)
Enter flange width in meters (m). Example: 0.1 (for 100mm)
Enter flange thickness in meters (m). Example: 0.008 (for 8mm)
Enter web thickness in meters (m). Example: 0.005 (for 5mm)
Enter length in meters (m). Example: 12
`;
break;
}
document.getElementById('dimensionInputs').innerHTML = html;
// Reset results and chart when shape changes
document.getElementById('mainResult').textContent = '–';
document.getElementById('volumeResult').textContent = 'Volume: –';
document.getElementById('densityInfo').textContent = 'Steel Density: –';
document.getElementById('materialArea').textContent = 'Material Area: –';
clearChart();
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function getUnitFromID(id) {
// Simple unit helper based on common ID patterns
if (id.includes('Length') || id.includes('Width') || id.includes('Height') || id.includes('Depth') || id.includes('Side') || id.includes('Diameter')) return 'm';
if (id.includes('Thickness') || id.includes('FlangeT') || id.includes('WebT')) return 'm';
return ";
}
function calculateVolume(shape, inputs) {
var volume = 0;
var area = 0; // For intermediate area result
var pi = Math.PI;
switch (shape) {
case 'plate':
case 'sheet':
var length = inputs.plateLength;
var width = inputs.plateWidth;
var thickness = inputs.plateThickness;
if (!validateInputs([ 'plateLength', 'plateWidth', 'plateThickness' ])) return null;
volume = length * width * thickness;
area = length * width; // Surface area
break;
case 'roundBar':
var diameter = inputs.roundBarDiameter;
var length = inputs.roundBarLength;
if (!validateInputs([ 'roundBarDiameter', 'roundBarLength' ])) return null;
var radius = diameter / 2;
area = pi * radius * radius; // Cross-sectional area
volume = area * length;
break;
case 'squareBar':
var side = inputs.squareBarSide;
var length = inputs.squareBarLength;
if (!validateInputs([ 'squareBarSide', 'squareBarLength' ])) return null;
area = side * side; // Cross-sectional area
volume = area * length;
break;
case 'angle':
var leg1 = inputs.angleLeg1;
var leg2 = inputs.angleLeg2;
var thickness = inputs.angleThickness;
var length = inputs.angleLength;
if (!validateInputs([ 'angleLeg1', 'angleLeg2', 'angleThickness', 'angleLength' ])) return null;
// Approximate area for angle L-shape
area = (leg1 * thickness) + ((leg2 – thickness) * thickness);
volume = area * length;
break;
case 'channel':
var height = inputs.channelHeight;
var width = inputs.channelWidth;
var thickness = inputs.channelThickness;
var length = inputs.channelLength;
if (!validateInputs([ 'channelHeight', 'channelWidth', 'channelThickness', 'channelLength' ])) return null;
// Approximate area for channel C-shape
area = (height * thickness) + (2 * width * thickness) – (thickness * thickness); // Corrected for overlap
volume = area * length;
break;
case 'iBeam':
var depth = inputs.iBeamDepth;
var flangeWidth = inputs.iBeamFlangeWidth;
var flangeThickness = inputs.iBeamFlangeThickness;
var webThickness = inputs.iBeamWebThickness;
var length = inputs.iBeamLength;
if (!validateInputs([ 'iBeamDepth', 'iBeamFlangeWidth', 'iBeamFlangeThickness', 'iBeamWebThickness', 'iBeamLength' ])) return null;
// Area calculation for I-beam
var topFlangeArea = flangeWidth * flangeThickness;
var webArea = (depth – 2 * flangeThickness) * webThickness;
var bottomFlangeArea = flangeWidth * flangeThickness;
area = topFlangeArea + webArea + bottomFlangeArea;
volume = area * length;
break;
}
return { volume: volume, area: area };
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function validateInputs(ids) {
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if (!validateInput(ids[i], 0.0001, 10000)) { // General min/max for validation
allValid = false;
}
}
return allValid;
}
function calculateWeight() {
var shape = document.getElementById('steelShape').value;
var inputs = {};
var inputIds = [];
// Collect input values and IDs based on shape
switch (shape) {
case 'plate':
case 'sheet':
inputs = { plateLength: getInputValue('plateLength'), plateWidth: getInputValue('plateWidth'), plateThickness: getInputValue('plateThickness') };
inputIds = ['plateLength', 'plateWidth', 'plateThickness'];
break;
case 'roundBar':
inputs = { roundBarDiameter: getInputValue('roundBarDiameter'), roundBarLength: getInputValue('roundBarLength') };
inputIds = ['roundBarDiameter', 'roundBarLength'];
break;
case 'squareBar':
inputs = { squareBarSide: getInputValue('squareBarSide'), squareBarLength: getInputValue('squareBarLength') };
inputIds = ['squareBarSide', 'squareBarLength'];
break;
case 'angle':
inputs = { angleLeg1: getInputValue('angleLeg1'), angleLeg2: getInputValue('angleLeg2'), angleThickness: getInputValue('angleThickness'), angleLength: getInputValue('angleLength') };
inputIds = ['angleLeg1', 'angleLeg2', 'angleThickness', 'angleLength'];
break;
case 'channel':
inputs = { channelHeight: getInputValue('channelHeight'), channelWidth: getInputValue('channelWidth'), channelThickness: getInputValue('channelThickness'), channelLength: getInputValue('channelLength') };
inputIds = ['channelHeight', 'channelWidth', 'channelThickness', 'channelLength'];
break;
case 'iBeam':
inputs = { iBeamDepth: getInputValue('iBeamDepth'), iBeamFlangeWidth: getInputValue('iBeamFlangeWidth'), iBeamFlangeThickness: getInputValue('iBeamFlangeThickness'), iBeamWebThickness: getInputValue('iBeamWebThickness'), iBeamLength: getInputValue('iBeamLength') };
inputIds = ['iBeamDepth', 'iBeamFlangeWidth', 'iBeamFlangeThickness', 'iBeamWebThickness', 'iBeamLength'];
break;
}
// Check if all required inputs are valid numbers
var allInputsValid = true;
for (var i = 0; i 0) {
document.getElementById('materialArea').textContent = 'Material Area: ' + area.toFixed(4) + ' m²';
} else {
document.getElementById('materialArea').textContent = 'Material Area: –';
}
updateChart(shape, inputs, weight);
}
// Charting logic
var weightChart;
var chartContext = document.getElementById('weightChart').getContext('2d');
function updateChart(shape, inputs, calculatedWeight) {
clearChart(); // Clear previous chart data
var labels = [];
var weights = [];
var densities = Array(10).fill(densityA36); // Density is constant
var scaleFactor = 1;
var increment = 0;
// Determine scale and increment based on shape and typical dimensions
switch (shape) {
case 'plate':
scaleFactor = inputs.plateLength || inputs.plateWidth || inputs.plateThickness || 1;
increment = scaleFactor / 9;
for (var i = 0; i < 10; i++) {
labels.push("Dim " + (i + 1));
var tempInputs = { …inputs };
// Scale one dimension while keeping others fixed for demo
if (inputs.plateLength) tempInputs.plateLength = increment * (i + 1);
else if (inputs.plateWidth) tempInputs.plateWidth = increment * (i + 1);
else tempInputs.plateThickness = increment * (i + 1);
var volData = calculateVolume(shape, tempInputs);
if (volData) {
weights.push(volData.volume * densityA36);
} else {
weights.push(0);
}
}
break;
case 'roundBar':
scaleFactor = inputs.roundBarLength || inputs.roundBarDiameter || 1;
increment = scaleFactor / 9;
for (var i = 0; i val > 0) || 1;
increment = representativeInput / 9;
for (var i = 0; i < 10; i++) {
labels.push("Scale " + (i + 1));
var scaledWeight = calculatedWeight * ((increment * (i + 1)) / representativeInput);
weights.push(scaledWeight || 0);
}
break;
}
// Ensure weights and labels have the same length
while (weights.length < labels.length) weights.push(0);
while (labels.length < weights.length) labels.push("Scale " + (labels.length + 1));
weightChart = new Chart(chartContext, {
type: 'bar', // Changed to bar for better visibility of individual points
data: {
labels: labels,
datasets: [{
label: 'Calculated Weight (kg)',
data: weights,
backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color
borderColor: 'rgba(0, 74, 153, 1)',
borderWidth: 1,
yAxisID: 'y-axis-weight'
},
{
label: 'Steel Density (kg/m³)',
data: densities,
type: 'line', // Line for density
borderColor: 'rgba(40, 167, 69, 0.8)', // Success color
backgroundColor: 'rgba(40, 167, 69, 0.2)',
borderWidth: 2,
fill: false,
yAxisID: 'y-axis-density'
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
x: {
title: { display: true, text: 'Dimension Scale' }
},
'y-axis-weight': {
type: 'linear',
position: 'left',
title: { display: true, text: 'Weight (kg)' },
ticks: { beginAtZero: true },
grid: {
drawOnChartArea: true,
}
},
'y-axis-density': {
type: 'linear',
position: 'right',
title: { display: true, text: 'Density (kg/m³)' },
ticks: {
beginAtZero: false, // Density is not zero
callback: function(value, index, values) {
return value.toLocaleString(); // Format density nicely
}
},
grid: {
drawOnChartArea: false, // Only draw grid lines for the primary y-axis
}
}
},
plugins: {
title: {
display: true,
text: 'Weight and Density Trend'
},
tooltip: {
mode: 'index',
intersect: false,
}
},
hover: {
mode: 'index',
intersect: false
}
}
});
}
function clearChart() {
if (weightChart) {
weightChart.destroy();
weightChart = null;
}
// Clear canvas content just in case
chartContext.clearRect(0, 0, chartContext.canvas.width, chartContext.canvas.height);
}
function resetCalculator() {
document.getElementById('steelShape').value = 'plate';
updateInputFields(); // This will reset inputs to default based on 'plate'
// Set sensible defaults for plate shape
document.getElementById('plateLength').value = 2;
document.getElementById('plateWidth').value = 1;
document.getElementById('plateThickness').value = 0.01; // 10mm
calculateWeight(); // Recalculate with defaults
clearChart(); // Clear chart on reset
updateChart('plate', { plateLength: 2, plateWidth: 1, plateThickness: 0.01 }, 157); // Re-render chart with defaults
}
function copyResults() {
var mainResult = document.getElementById('mainResult').textContent;
var volumeResult = document.getElementById('volumeResult').textContent;
var densityInfo = document.getElementById('densityInfo').textContent;
var areaResult = document.getElementById('materialArea').textContent;
var shape = document.getElementById('steelShape').value;
var shapeLabel = "Steel Shape: " + shape.replace(/([A-Z])/g, ' $1').trim(); // Convert camelCase to spaced string
var dimensionDetails = "Dimensions:\n";
var inputIds = [];
switch (shape) {
case 'plate': inputIds = ['plateLength', 'plateWidth', 'plateThickness']; break;
case 'roundBar': inputIds = ['roundBarDiameter', 'roundBarLength']; break;
case 'squareBar': inputIds = ['squareBarSide', 'squareBarLength']; break;
case 'angle': inputIds = ['angleLeg1', 'angleLeg2', 'angleThickness', 'angleLength']; break;
case 'channel': inputIds = ['channelHeight', 'channelWidth', 'channelThickness', 'channelLength']; break;
case 'iBeam': inputIds = ['iBeamDepth', 'iBeamFlangeWidth', 'iBeamFlangeThickness', 'iBeamWebThickness', 'iBeamLength']; break;
}
inputIds.forEach(function(id) {
var element = document.getElementById(id);
if (element) {
dimensionDetails += `- ${element.labels ? element.labels[0].textContent : id}: ${element.value} ${getUnitFromID(id)}\n`;
}
});
var resultsText = "A36 Steel Weight Calculation Results:\n" +
`${shapeLabel}\n` +
`${dimensionDetails}\n` +
`——————–\n` +
`Weight: ${mainResult}\n` +
`${volumeResult}\n` +
`${densityInfo}\n` +
`${areaResult}\n` +
`——————–\n` +
`Formula: Weight = Volume × Density`;
navigator.clipboard.writeText(resultsText).then(function() {
// Optional: Provide user feedback
var copyButton = document.querySelector('button.primary[onclick="copyResults()"]');
var originalText = copyButton.textContent;
copyButton.textContent = 'Copied!';
setTimeout(function() {
copyButton.textContent = originalText;
}, 1500);
}).catch(function(err) {
console.error('Failed to copy: ', err);
alert('Failed to copy results. Please copy manually.');
});
}
// FAQ Toggle
function toggleFaq(element) {
var faqItem = element.closest('.faq-item');
faqItem.classList.toggle('active');
}
// Initial setup on page load
document.addEventListener('DOMContentLoaded', function() {
updateInputFields(); // Load initial input fields for the default shape
resetCalculator(); // Load default values and calculate
// Initial chart render after defaults are set
var shape = document.getElementById('steelShape').value;
var inputs = { plateLength: 2, plateWidth: 1, plateThickness: 0.01 }; // Default plate inputs
updateChart(shape, inputs, 157); // Render initial chart for defaults
});