Quick Answer
The anchor tensile load is calculated by multiplying the wind load on the IGU area by the safety factor and dividing by the number of anchors.
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Explore ToolFusionResult Interpretation
The calculated anchor tensile load should be compared against the anchor manufacturer's rated capacity. A safety factor greater than 1.0 ensures the design load is within acceptable limits.
Worked Example
Default calculation
Given:
- Insulated glass unit projected area = 2.5
- Insulated glass unit self-weight = 620
- Number of anchors per IGU = 4
- Structural safety factor = 2
- Design wind pressure = 900
Expected Result:
- Anchor tensile load = 1435
Engineering Interpretation:
Under the given input conditions, the calculated result is: Anchor tensile load = 1435 N.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
anchor tensile load = (design wind pressure * insulated glass unit projected area + insulated glass unit self-weight) * structural safety factor / number of anchors per iguThe anchor load is computed as (wind_pressure × igu_area + igu_weight) × safety_factor / anchor_count
Standards: AS 1288 / EN 199
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| wind_pressure | Design wind pressure | INPUT | Design wind pressure |
| igu_area | Insulated glass unit projected area | INPUT | Insulated glass unit projected area |
| igu_weight | Insulated glass unit self-weight | INPUT | Insulated glass unit self-weight |
| safety_factor | Structural safety factor | INPUT | Structural safety factor |
| anchor_count | Number of anchors per IGU | INPUT | Number of anchors per IGU |
| anchor_load | Anchor tensile load | OUTPUT | Anchor tensile load |
Calculation Steps
- Enter the design wind pressure in Pascals
- Enter the projected area of the insulated glass unit in square meters
- Enter the self-weight of the IGU in Newtons
- Set the structural safety factor (typically 2.0 for facade applications)
- Enter the number of anchors per IGU panel
- Read the anchor tensile load from the result
Engineering Summary
What is the anchor tensile load for an insulated glass unit under the given wind pressure and safety requirements?
Engineering Applications
Facade Engineering
Structural glazing and curtain wall anchor design
Glass Design
Insulated glass unit load distribution and point-fixed support design
Notes / Limitations
- ASSUMPTIONWind load is uniformly distributed across the IGU area.
- ASSUMPTIONAll anchors share the load equally.
- LIMITATIONDoes not account for dynamic wind loading or gust factors.
- LIMITATIONAnchor spacing and edge distance effects are not considered.
References
Frequently Asked Questions
What safety factor should I use?
For facade applications, a safety factor of 2.0 is typical per AS 1288. Higher factors may be required for seismic zones or impact-prone areas
How is the IGU weight calculated?
The IGU weight depends on glass thickness, panel dimensions, and interlayer type. Typical IGU weights range from 300-1200 N for commercial facade panels
Technical Details
- Assumption
- Wind load is uniformly distributed across the IGU area.
- Assumption
- All anchors share the load equally.
- Limitation
- Does not account for dynamic wind loading or gust factors.
- Limitation
- Anchor spacing and edge distance effects are not considered.
- Applicability
- Facade: Yes; Structural: Yes
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