name of the building       identification of the compartment       variant 1
Potential risk calculation Variant 1 describes usually the proposed improvements, e.g. automatic fire detection + fire proofing
DATA Symbol P - REF
DATA VARIANT 1 NEW VALUES VARIANT 1 Comments[1]
Fire load factor q.[2]                
Immobile (building) fire load density: Qi MJ/m[3] 100 Unchanged 100 0[4] 100  
Mobile (moveable) fire load density Qm MJ/m 500 Unchanged 500 0 500  
      1,30 The calculated value of q is = q = 1,30  
Fire spread factor i.[5]                
Temperature rise T[6] Info P 500 Unchanged 500   500  
Average dimension of content m[7] Info P 0,300 Unchanged 0,30 0 0,30  
Reaction to fire class of surfaces[8] M Info P 2,5 Unchanged[9] 2,5   2,5  
      0,80 The calculated value of i is : i = 0,80  
Area factor g                
Theoretical length l m 250,00 Define the longest distance between the centres of two sides of the compartments' perimeter. This is the theoretical length l. REF 90,00[10] 250,00  
Total compartment area Atot m 25.000 Define the total surface area of the compartment REF 5000[11] 25000  
Equivalent width b m 100,00 Divide this area by the theoretical length to obtain the equivalent width b.     100,00  
Frontage[12]     long Unchanged long   long  
    Info P 3,89 The calculated value of g is : g = 3,89  
Venting factor v                
Mobile (moveable) fire load density Qm MJ/m 500 The mobile fire load Qm, which is already entered, is used here.     500  
STEP 1 : Floor to ceiling height[13] h m 12,0 Define the average height between floor and ceiling in the compartment. REF 0,0[14] 12,00  
Smoke venting ratio STEP 1 m 262,5 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] REF 80,0[16] 262,50  
  STEP 2 m 375,0 Measure the aerodynamic area of static smoke vents in m REF 0,0[17] 375,0  
  STEP 3 m/h 0[18] Nominal flow of mechanical (smoke) ventilation systems[19] REF 0[20] 0,0  
    m 25000 Total area of compartment 25000 ratio 0,026  
    % 2,6% Estimated smoke venting ratio k ( if not calculated) k=  [21] 2,6%  
    Info P 0,81 The calculated value of v is: v = 0,81  
Level factor e                
Level[22] E #,# 0,00 Mezzanines and platforms : add decimal value to level number REF 1,30 0,00  
    Info P 1,00 The calculated value of e is: e = 1,00  
Access factor z                
The number of access directions[23] Z # 3 The number of accessible directions is Z (1 to 4). REF 2[24] 3,00  
Height difference[25] H m 0,00 Height difference in meter (positive or negative) REF 10,00[26] 0,00  
  b m 100,0 already entered for factor g     100,00  
    Info P 1,05 Access factor z z = 1,05  
Potential Risks                
        Potential risk values for :   variant 1    
Fire load factor q. q 1,30   property (building and content) P 3,47  
Fire spread factor i. i 0,80   occupants (people) P1 0,89 Date of this analysis
Area factor g g 3,89   activities P2 2,67  
Level factor e e 1,00     date(s) of the analysis
Venting factor v v 0,81      
Access factor z z 1,05            

[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/m ;
1 kg wood / m equals appr.. 15 MJ/m
[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]
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)
[8]
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.
[9]
Go to sheet "info P" to make a weighted average
[10]
New values are only accepted when previous column indicates "NEW"
[11]
New values are only accepted when previous column indicates "NEW"
[12]
Fire fighting operations are much more difficult when a building is only accessible from its narrow side
[13]
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.
[14]
New values are only accepted when previous column indicates "NEW"
[15]
Only these building elements can contribute to the "fire induced" escape of smoke and heat.
[16]
New values are only accepted when previous column indicates "NEW"
[17]
New values are only accepted when previous column indicates "NEW"
[18]
Equivalent area: 10000 Nm/h = 1 m
[19]
These systems must be designed to permit smoke removal
[20]
New values are only accepted when previous column indicates "NEW"
[21]
estimated value as % of the floor area to override the previous data
[22]
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.
[23]
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.
[24]
New values are only accepted when previous column indicates "NEW"
[25]
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.
[26]
New values are only accepted when previous column indicates "NEW"