Health and Safety at Work (Hazardous Substances) Regulations 2017

Separation of hazardous substance locations holding class 6 and 8 substances

13.40 Measurement of separation distance

For the purposes of regulations 13.41, 13.42, and 13.43 and Schedule 17, separation distances may be measured in a horizontal plane around an intervening screen wall, provided that,—

(a)

where the height of the store is equal to or more than that of the protected place or public place, the wall extends at least 1 m above the highest container in the store; and

(b)

where the height of the store is less than that of the protected place or public place, the wall extends at least 1 m above the place or extends as a roof above the store; and

(c)

the wall is marked to indicate the maximum permissible storage height; and

(d)

the wall and the roof, if any, have a fire-resistance rating of at least 120/120/120 minutes.