name of the building     identification of the compartment       reference status
Potential risk calculation The reference situation is usually the actual status.
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DATA Symbol Unit Results
Comments[1]
Fire load factor q.[2]            
Immobile (building) fire load density: Qi MJ/m²[3] B. Incombustible construction, with max. 10% allowance for combustible construction elements as windows, roof covering, etc. 100 0[4] 100  
Mobile (moveable) fire load density Qm MJ/m² a1. Offices 400 200 600  
      The calculated value of q is = q = 1,35
Fire spread factor i.[5]  
Temperature rise T[6] INFO P d. Average content of residential buildings  ( 250°C - 482°F) 250 500[7] 250[8]  
Average dimension of content  m[9]  INFO P Define m: link to: info P or enter value in column F) 1,00 0[10] 1,00  
Reaction to fire class of surfaces[11] M INFO P  WEIGHTED AVERAGE of the following classes (link to Info P)[12] 2,5   2,5  
      The calculated value of i is : i = 1,00
Area factor g  
Theoretical length L m Define the longest distance between the centres of two sides of the compartments' perimeter. This is the theoretical length l.   50 50  
Total compartment area Atot m² Define the total surface area of the compartment   2000 2000  
Equivalent width  b m Divide this area by the theoretical length to obtain the equivalent width b.     40  
Frontage[13]     Building accessible at its long side long      
    INFO P The calculated value of g is : g = 1,28
Venting factor v  
Mobile (moveable) fire load density Qm MJ/m² The mobile fire load Qm, which is already entered, is used here.     600
STEP 1 : Floor to ceiling height[14] h m Define the average height between floor and ceiling in the compartment.   4 4  
Smoke venting ratio k Define the smoke-venting ratio k as follows:          
  STEP 2 m² Total area of single glazed windows, glass and plastic skylights in the ceiling (roof) and upper third op the walls giving to the outside.[15]   10 3  
  STEP 3 m² Measure the aerodynamic area of static smoke vents in m²   10 10  
    Nm³/h Nominal flow of mechanical (smoke) ventilation systems[16]   0 0  
    m² Total area of compartment 2000 ratio 0,650%
      The smoke venting ratio k  (calculated with these values) or estimated k =  [17] 0,007
    INFO P The calculated value of v is: v = 1,00
Level factor e  
Level[18] E   Mezzanines and platforms : add decimal value to level number   0 0  
    INFO P The calculated value of e is: e = 1,00
Access factor z  
The number of access directions[19] Z   The number of accessible directions is Z (1 to 4).   3 3  
Height difference[20] H m Height difference in meter (positive or negative)  25 0 0  
  b   already entered for factor g     40
    INFO P Access factor z z = 1,00
Potential Risks  
      Potential risk values for :        
Fire load factor q. q 1,35 property (building and content) P 1,73  
Fire spread factor i. i 1,00 occupants (people) P1 1,35 Date of this analysis
Area factor g g 1,28 activities P2 1,28  
Level factor e e 1,00   date(s) of the analysis
Venting factor v v 1,00    
Access factor z z 1,00          
[1]
Motivate your selection here.
[2]
Fire load factor q is calculated with the value of the fire load density, indicating  how much energy can be released per area unit. The total fire load density can be defined as the sum of the 'immobile' fire load density Qi, made up by the building elements, and the 'mobile' fire load density Qm of its content.
[3]
100 BTU/sq.ft. equals 1 MJ/m² ;
 1kg wood / m² equals  appr. 15 MJ/m²
[4]
User defined input or correction
[5]
Fire spread factor i indicates how easy a fire can spread through a building. It is calculated from the average dimension of the content m (in meter), the flame propagation class M of the surfaces, and the temperature rise T necessary to ignite or damage the content.
[6]
T is the temperature rise that the content of a compartment can sustain before it is damaged or ignited. E.g.  when the 'content' is human beings a temperature rise of more than 100 °C (180°F ) is not tolerable.
[7]
user defined input here : accepted if lower value
[8]
Lowest value is accepted
[9]
Examples: m = 0.3 (equal to 1 ft) for most objects in our daily environment; palletised storage of goods: m = 1 meter (3ft), in industries producing smaller objects: m = 0.1 meter(4 inch)
[10]
User defined input > 0 overrides value in column E
[11]
The more flammable the surfaces of the content, the easier a fire will spread. To typify the fire propagation on the surfaces, 6 fire spread classes are used, taking into account packaging and decoration materials.
[12]
Go to sheet "info P" to make a weighted average
[13]
Fire fighting operations are much more difficult when a building is only accessible from its narrow side
[14]
Define the height h, between the floor and the ceiling of the storey. For a sloping roof or ceiling, it is the average height that is used.
[15]
Only these building elements can contribute to the "fire induced"  escape of smoke and heat.
[16]
These systems must be designed to permit smoke removal
[17]
Enter here an estimated value as % of the  floor area to override the previous data
[18]
Number all the levels in the following way: E =0 for the main access level. All upper levels are then E = 1,2,3, etc. All underground levels are then E= -1, -2, -3, etc.
[19]
To define Z, the number of access directions, draw an imaginary map of the building with the north at the main entrance of the building, and check the south, east and west for free access for the fire brigade.
[20]
To define H+ or H-: Look at the fire brigades' way towards the fire. Upwards is H+ the vertical distance from the access level to the floor level of the compartment.  Downwards: H-, the negative value of the distance from access level to the basement floor.