1963-HKRS30-8-54_Part06 — Page 21

Annual in- spection of dacopers filters and

(e) every duct shall-

(i) be wholly constructed of non-combustible material having a strength and durability not less than that of gal- vanized sheet-iron or steel;

(ii) be accessible for the purposes of cleaning throughout its entire length:

(iii) where its size is sufficient to allow any person to enter therein, be fitted with access openings to allow a person to enter the same and shall be constructed to bear the weight of any person who has so entered:

(iv) at the point where it passes through any floor, wall or ceiling, be fitted with a damper which shall be operated by fusible links of a type approved by the Director, and designed to operate up to a temperature of 155oF., and be so constructed or protected as to resist the action of fire for a period not less than the period for which the floor, wall or ceiling through which it passes is designed to resist the action of fire;

(f) no duct shall serve more than one building:

(g) every Alter shall be wholly constructed of non-combustible

material, other than steel wool; and

(b) every electrostatic filter of precipitator shall be of a type

approved by the Director.

(2) Where he thinks fit and subject ta such conditions as he may specify, the Director may by notice in writing exempt any-ventilating system in respect of which application in writing in that behalf is made from compliance with all or any of the provisions of paragraph (1).

5. Every damper, filter and precipitator in any ventilating system to which these regulations apply shall be inspected at intervals not exceeding twelve months by an officer of the Fire Services Department precipimators. authorized in writing by the Director.

Power of muthorized

officer.

Existing ventilating systems.

6. For the purposes of these regulations, any officer of the Firs Services Department authorized in writing by the Director may carry out such tests of any ventilating system to which these regulations apply. as may be necessary to ascertain whether or not the same is in safe and efficient working order.

1. Where a ventilating system to which these regulations apply has been installed in any building before the commencement of these regulations there shall be no requirement to comply with the provisions of regulation 4 unless and until-

(a) the ventilating system has been removed or is altered in any

way: or

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(b) the Director is of the opinion that the ventilating system cou-

stitutes a fire hazard.

COUNCIL CHAMBER,

29th September, 1984.

Explanatory Note.

Clerk of Councils.

(This more is not part of the regulations, but is intended to indicate their general purport).

These regulations apply to ventilating systems with ducting or trunking, which passes from une room to another, and which has been proved to be a particularly dangerous fire hazard. They follow similar provisions in Pan VIJI of the Public Health and Urban Services Ordinance, 1960, which apply to ventilat. ing systems in restaurants, cinemas and other similar buildings.

(Secretariat BL8/741/63)