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View factors (also known as configuration factors or shape factors) are fundamental parameters in radiative heat transfer calculations. They represent the fraction of radiation leaving one surface that directly strikes another surface. View factors are dimensionless quantities that depend solely on the geometry and orientation of the surfaces involved.
In fire engineering, view factors are essential for calculating radiative heat flux between fire sources and target surfaces, enabling accurate prediction of heat transfer rates in fire scenarios. They help engineers predict how fire and smoke will spread through openings in buildings, such as windows, doors, and ventilation systems.
* Note: Total points = (Resolution²). High resolution significantly increases computing
time.
Units: All dimensions in meters (SI).
Upload a CSV file with opening configurations. Expected columns: Type, Label, Width, Height, X, Y, Z, RotX, RotY, RotZ
The Time Equivalent Fire Severity Calculator is a tool for fire engineers to justify Fire Resistance Levels (FRLs) to a reasonable level without compromising the level of fire safety. It compares the burnt-out time of a potential fire based on the building's specific configuration.
This evaluation takes into account parameters such as fuel load, unprotected openings for ventilation, and active fire suppression systems (if any). By modeling these factors, engineers can determine the required structural fire resistance more accurately than using generic prescriptive rules.
| Scenario Name | Fire Load Fractile | Sprinkler Failure? | Breakage % | Actions |
|---|
* Only 1 Base Case allowed. You can add multiple Sensitivity Cases.
| FS # | Description | Use Class | Floor Area (m²) | Perimeter (m) | Height (m) | Vert Open (m²) | Avg H (m) | Req FRL (min) | Scenario | Euro | CIB | Law | Delete |
|---|
The Radiation Calculator is designed to evaluate radiative heat flux from fire sources to target surfaces. Radiation is often the dominant mode of heat transfer in large fires and plays a critical role in determining the safety of occupants and the potential for secondary ignition of nearby materials.
By modeling the fire as various geometric sources, engineers can predict the heat intensity (kW/m²) at specific distances, which is essential for determining safe separation distances and assessing the vulnerability of building elements or occupants.
This tool is coming soon.
Calculate the time for smoke to fill a compartment to a critical height.
No calculation performed.
1D Steady-State Conduction Calculator.
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Evacuation Flow Rate Calculator.
No calculation performed.
Steel Temperature Rise (Lumped Mass Method).
No calculation performed.
Calculate Required Safe Egress Time (RSET) comparing Deemed-to-Satisfy (DtS) requirements against a Performance Solution.
The Smoke Filling Calculator predicts the development and descent of the hot smoke layer within a compartment during a fire. Since smoke inhalation is the leading cause of fire-related casualties, accurately modeling smoke movement is vital for life safety assessments.
By evaluating plume dynamics and mass flow rates, this tool helps engineers determine the time available before the smoke layer reaches a height that compromises tenability or obscures exit paths, informing smoke control and extraction system requirements.
This tool is coming soon.
The Heat Transfer Analysis tool provides a framework for studying the movement of thermal energy through building elements. This involves complex interactions of conduction through solids, convection at surfaces, and radiative exchange between the fire and the structure.
Understanding temperature profiles within structural members (such as steel beams or concrete slabs) is essential for predicting their mechanical response and evaluating the fire resistance of building assemblies under various fire exposures.
This tool is coming soon.
This tool generates design fire curves (Heat Release Rate vs. Time) based on the t-squared growth model (Q = αt2). Engineers can define the growth phase, peak HRR, and decay phase to simulate various fire scenarios. The generated profile can be exported for use in other fire modeling tools.
| Max HRR: | - |
| Time to Peak: | - |
| Total Energy (MJ): | - |
| Coefficient (α) Used: | - |
Drag headers to reorder columns.
| Property | Value | Unit | Notes |
|---|---|---|---|
| Density (ρs) | 7850 | kg/m³ | Constant |
| Specific Heat (cs) | 600 | J/kg.K | Simplified constant value |
| Thermal Conductivity (k) | 45 - 54 | W/m.K | varies with temp |
| Emissivity (ε) | 0.7 | - | Carbon Steel |
| Parameter | Value (Typical) | Source |
|---|---|---|
| Specific Flow Rate (Doors) | 1.33 pers/m/s | SFPE / C/VM2 |
| Boundary Layer (Walls) | 0.15 m | SFPE / Pauls |
| Walking Speed (Horizontal) | 1.0 - 1.2 m/s | General Population |
| Material | Density (kg/m³) | Specific Heat (J/kg.K) | Conductivity (W/m.K) |
|---|---|---|---|
| Normal Weight Concrete | 2300 | 880 | 1.4 - 1.9 |
| Gypsum Plasterboard | 800 - 950 | 1090 | 0.17 |
| Brick (Common) | 1900 | 800 | 0.6 - 1.0 |
| Timber (Pine) | 450 - 600 | 1600 - 2300 | 0.12 - 0.15 |
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