4.2.7.5. (1) Except as provided in Sentence (2), the storage of flammable and combustible liquids in storage areas specified in Clause 4.2.7.2.(1)(a) shall (a) conform to Table 4.2.7.A. (i) where it consists of palletized or solid piled storage, or (ii) where stored in racks in buildings not protected in conformance with Article 4.2.7.7., or (b) conform to Table 4.2.7.B. where stored in racks in buildings protected in conformance with Article 4.2.7.7. (2) Where a building is designed for the storage of flammable or combustible liquids, there is no limit on the total quantity of storage per fire compartment provided (a) the building is separated from adjacent buildings by (i) a firewall having a fire-resistance rating of at least 4 hr, or (ii) spatial separation in conformance with the Building Code, and (b) in protected rack storage, the quantities in each individual storage area do not exceed those specified in Table 4.2.7.B. (3) Where containers for 2 or more liquids having different flash points are stored together in a single individual storage area, the maximum quantity permitted in the individual storage area shall equal that permitted for the liquid with the lowest flash point. (4) When 2 or more classes of liquids are stored in a single fire compartment, the maximum quantity permitted for each class of liquid shall be calculated as follows: qIA/QIA + qIB/QIB + qIC/QIC + qII/QII + qIIIA/QIIIA < 1 where  qIA,IB or IC 

=

the actual quantity of Class IA, IB or IC liquid present


qII

=

the actual quantity of Class II liquid present


qIIIA 

=

the actual quantity of Class IIIA liquid present


QIA,IB or IC 

=

the maximum quantity of Class IA, IB or IC liquid permitted in Table 4.2.7.A. or 4.2.7.B. for the arrangement


QII 

=

the maximum quantity of Class II liquid permitted in Table 4.2.7.A. or 4.2.7.B. for the arrangement


QIIIA 

=

the maximum quantity of Class IIIA liquid permitted in Table 4.2.7.A. or 4.2.7.B. for the arrangement TABLE 4.2.7.A. Indoor Container Storage (Palletized or Solid Piled Storage and Unprotected Rack Storage)   Forming Part of Article 4.2.7.5.  Class of   Liquid

Storage Level

Protected Storage (1)

Unprotected Storage


Maximum Quantity    per I.S.A.(2),    L

Maximum Storage Height, m

Maximum Quantity per Fire Compartment, L

Maximum Quantity per I.S.A.(2),    L

Maximum Storage Height,   m

Quantity per Fire Compartment, L


Class IA

First Storey
Storeys above  the first storey
Basement

10000
7500 

Not permitted

1.5
1.5 

Not permitted

50000
30000 

Not Permitted

2500
2500 

Not Permitted

1.5
1.5 

Not Permitted

2500
2500 

Not Permitted


Class IBor IC

First Storey
Storeys above  the first storey
Basement

20000
10000 

Not permitted

2.0
2.0 

Not permitted

60000
50000 

Not Permitted

10000
10000 

Not Permitted

1.5
1.5 

Not Permitted

10000
10000 

Not Permitted


Class II

First Storey and storeys above  the first storey
Basement

40000  

25000

3.0  

1.5

100000  

25000

15000  

Not Permitted

3.0  

Not Permitted

30000  

Not Permitted


Class IIIA

First Storey and storeys above  the first storey
Basement

60000  

40000

6.0  

3.0

200000  

100000

50000  

Not Permitted

4.5  

Not Permitted

100000 

 
Not Permitted Notes to Table 4.2.7.A.: (1)See Article 4.2.7.7. (2)Individual Storage Area TABLE 4.2.7.B. Indoor Container Storage (Protected Rack Storage)(1) Forming Part of Article 4.2.7.5.  Class of Liquid

Storage Level

Maximum Height, m

Maximum Quantity per Fire Compartment, L


Class IA

First Storey
Storeys above the first storey
Basement

7.5
4.5
Not permitted

30000
17000
Not permitted


Class IBor IC

First Storey
Storeys above the first storey
Basement

7.5
4.5
Not permitted

60000
35000
Not permitted


Class II

First Storey 
Storeys above the first storey
Basement

7.5
7.5
4.5

100000
100000
35000


Class IIIA

First Storey 
Storeys above the first storey
Basement

12.0
6.0
6.0

200000
200000
100000 Notes to Table 4.2.7.B.: (1) See Article 4.2.7.7. Spill control