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Clause 4.1 General Clause 4.2 Position Clause 4.3 Accessibility Of Ventilation Sleeves Clause 4.4 Fragmentation Plate

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Clause 4.2 Position

TRSS 2021

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The position of each ventilation sleeve opening shall comply with the below clauses. Refer to FIGURE 4.2(a) and 4.2(b).

a. The height of each ventilation sleeve opening, measured from the centre of the opening to internal FFL of the SS shall be between 1900mm and 3550mm.

b. The ventilation sleeve opening shall be positioned such that there is sufficient clearance from any structural elements and services. The centre of the ventilation sleeve opening to the soffit of ceiling slab and the nearest face of the internal SS walls shall be at least 350mm.

c. Where the ventilation sleeve is placed above or adjacent to the SS door frame, the centre of the ventilation sleeve opening shall be at least 275mm from the nearest edge of the SS door frame.

d. The minimum distance between the centres of the two ventilation sleeves openings shall be at least 1000mm.

e. Where the ventilation sleeve is located along the staircase flight of the S/C SS or scissor S/C SS, the maximum distance measuring between the edge of either end of staircase flight and the centre of the ventilation sleeve opening shall be 500mm.

f. The ventilation sleeve openings shall not be opened into enclosed area outside the SS or S/C SS or scissor S/C SS. The ventilation sleeves shall not be located in the SS wall sharing with the dwelling unit. Refer to FIGURE 4.2(c). Enclosed area shall be defined as an area fully surrounded walls with an access door.

g. In the case of SS, the ventilation sleeve shall be located away from the rescue hatch openings. Refer to FIGURE 2.6.1(a).