name of the building 



identification of the
compartment 



variant 2 

Potential risk calculation 



Variant 2 can be used for an
alternative proposition, e.g. sprinkler protection 









DATA 
Symbol 

P  REF 









DATA VARIANT 2 
NEW VALUES VARIANT
2 
Comments[1] 

Fire load factor q.[2] 









Immobile (building) fire
load density: 
Qi 
MJ/m²[3] 
100 
Unchanged 
100 
0[4] 
100 


Mobile
(moveable) fire load density 
Qm 
MJ/m² 
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 
0,30 
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 
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 
m² 
25000 
Define the total
surface area of the compartment 
REF 
5000[11] 
25000 


Equivalent
width 
b 
m 
100 
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/m² 
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 
m² 
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 
m² 
375,0 
Measure
the aerodynamic area of static smoke vents in m² 
REF 
0,0[17] 
375,0 



STEP 3 
m³/h 
0[18] 
Nominal
flow of mechanical (smoke) ventilation systems[19] 
REF 
50000[20] 
0,0 




m² 
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 


Height
difference[25] 
H 
m 
0,00 
Height
difference in meter (positive or negative) 
REF 
0,00[26] 
0,00 



b 
m 
100,00 
already
entered for factor g 


100,00 




INFO P 
1,05 
Access factor z 
z 
= 
1,05 


Potential Risks 













Potential risk values for : 

variant 2 



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 


































































