To calculate the price of a crowd control barrier, we begin by determining its total weight. Using this weight, we then break down the costs by calculating the price for each specific type of steel tube utilized in the barrier’s construction. By multiplying the weight of each steel tube by its corresponding price, we can establish the total raw material cost.
After determining the material cost, additional factors such as manufacturing, labor, galvanization (if necessary), and transportation costs must be considered. These elements are then added to the material cost to arrive at the final price of the crowd control barrier.
This methodical approach ensures precise pricing based on the weight of materials and the inclusion of production-related costs. We will use the following crowd control barrier specifications as a reference for calculating its price:
Example crowd control barriers we sold to Australian and New Zealand
| Specification | Details |
|---|---|
| Total Length | 2170mm |
| Total Height | 1090mm |
| Top Frame Tube Diameter | OD38 x 1.5mm |
| Vertical Tube Diameter | OD16 x 1.2mm |
| Vertical Tube Spacing | 100mm |
| Base Plate Dimensions | 500 x 50 x 10mm |
| Handle Height | 570mm |
| Top Space (Gap) | 180mm |
| Bottom Space (Gap) | 100mm |
| Vertical Tube Length | 904mm |
| Arc Radius | 166mm |
Segmented Approach to Calculating the Weight of a Crowd Control Barrier ?
When calculating the weight of a crowd control barrier, we employ a segmented approach to analyze each component of the barrier. Based on the provided image and specifications, we can break down the barrier into the following parts for easier calculation:
- OD38mm x 1.5mm tube sections: This includes the round top section and the bottom rail.
- Upright tubes: These consist of OD16mm x 1.2mm tubes positioned vertically across the barrier.
- Base plate: Comprising dimensions of 500mm x 50mm x 10mm, it includes a 100mm upright tube for support.
- Female and male hooks: These parts are used for connecting barriers together. total length male and female 170mm
By calculating the weight of each part separately, we can accurately determine the total weight of the crowd control barrier, which will be essential for further cost calculations.
Weight caculated
First, we need to calculate the weight of one meter of OD38mm x 1.5mm galvanized steel tube. The calculation process is as follows:
To calculate the weight of a 38mm x 1.5mm x 1000mm steel tube, you can follow these steps:
- Identify the dimensions: The steel tube has an outer diameter (OD) of 38mm, a wall thickness of 1.5mm, and a length of 1000mm (1 meter).
- Use the weight formula: The general formula for calculating the weight of a steel tube is:
Weight (kg) = (Outer Diameter – Wall Thickness) × Wall Thickness × 0.02466 × Length (m). - Substitute the values:
- Outer Diameter = 38mm
- Wall Thickness = 1.5mm
- Length = 1 meter
- Constant = 0.02466 (used to convert millimeters to kilograms)
- Perform the calculation:
Plug the values into the formula and solve.
Weight (kg) = (38mm – 1.5mm) × 1.5mm × 0.02466 × 1 meter
The result will give you the weight of the tube.
By following this method, we calculated the weight to be approximately 1.35 kg for a 1-meter section of a 38mm x 1.5mm steel tube.
Round top（ arched frame）Caculated
Due to the base plate’s thickness of 10 mm, the total height of the barriers will be 1,080 mm and female and male locking equal to 170mm
| Parameter | Calculation | Result |
|---|---|---|
| Total Horizontal Width (W_c) | 2000 mm – 2 × 19 mm | 1962 mm |
| Total Vertical Height (H_c) | 1080 mm – 19 mm | 1061 mm |
| Horizontal Straight Length (L_straight) | 1962 mm – 2 × 166 mm | 1630 mm |
| Arc Length per Bend (S_bend) | π × 166 mm / 2 | ~260.8 mm |
| Total Arc Length (S_total bend) | 2 × 260.8 mm | 521.6 mm |
| Vertical Straight Length (L_vertical) | 1061 mm – 166 mm | 895 mm |
| Total Vertical Length (L_total vertical) | 2 × 895 mm | 1790 mm |
| Total Pipe Length (L_total) | 1790 mm + 521.6 mm + 1630 mm | 3941.6 mm |
| Total Pipe Length in Meters | 3941.6 mm ÷ 1000 | 3.94 meters |
Total weight : 3.94 meters x 1.35kg =5.319kg
Bottom Rails caculated
The total length of the crowd control barriers is 2170mm, including the male and female locking mechanism, which together measure 170mm. After deducting the 170mm for the locking mechanism, the overall dimension is reduced to 2000mm. The frame consists of two tubes, each 38mm in diameter, resulting in a bottom rail length of 2000mm – 76mm = 1924mm.
The total weight is calculated as 1.924m × 1.35kg, which equals 2.6kg.
Upright tubes weight caculated
| Description | Measurement (mm) |
|---|---|
| Overall Height | 1,090 |
| Base Plate Height | -10 |
| Adjusted Bottom Spacing | -90 |
| Additional Adjustment | -76 |
| Upright Tubes Length | 914 |
Caculate the verticle tubes number
| Component | Quantity | Measurement (mm) | Total Width (mm) |
|---|---|---|---|
| Outer Pipes | 2 | 38 | 76 |
| Vertical Pipes | 16 | 16 | 256 |
| Spacing Between Vertical Pipes | 15 | 97.18 | 1,457.7 |
| Combined Width | – | – | 1,789.7 |
| Remaining Width for Side Margins | – | – | 210.3 |
| Side Margins (Each Side) | – | – | 105.15 |
| Total Width of Barrier | – | – | 2,000 |
| Number of Vertical Pipes Needed | – | – | 16 |
With a total barrier width of 2,000 mm, the two outer pipes take up 76 mm. Adding 16 vertical pipes uses an additional 256 mm. The spacing between these pipes, at 97.18 mm each, totals approximately 1,457.7 mm. Together, all components occupy about 1,789.7 mm, leaving 210.3 mm for side margins. This configuration ensures that the barrier is balanced and structurally sound with 16 vertical pipes.
So total need 16 x 914mm x 0.44kg/m =6.43kg
Flat Bar Weight Calculation Table
| Item | Dimensions (mm) | Converted to Meters (m) | Calculation Steps | Result (kg) |
|---|---|---|---|---|
| Length | 500 mm | 0.5 m | – | – |
| Width | 50 mm | 0.05 m | – | – |
| Thickness | 10 mm | 0.01 m | – | – |
| Volume Calculation | – | – | Length × Width × Thickness = 0.5 m × 0.05 m × 0.01 m | 0.00025 m³ |
| Material Density | – | – | Density of steel is approximately 7850 kg/m³ | – |
| Weight Calculation | – | – | Volume × Density = 0.00025 m³ × 7850 kg/m³ | 1.96 kg |
The crowd control barrier is equipped with two base plates, each measuring 50mm x 10mm x 100mm. The total weight of the two base plates is 3.92kg, as each plate weighs 1.96kg.
Male and Female hooks price and weight
The crowd control barrier also includes male and female hooks, which weigh 1kg in total. The price for these hooks is 1 Australian dollar. These hooks are designed for secure connection between barriers, ensuring stability during use. They are durable and easy to install, providing a reliable solution for maintaining orderly crowd control in various settings.