Which of the following construction requires a fire rating period?
(1) Non-load-bearing partition walls between retail shops inside a shopping arcade of a single owner and management
(2) Reinforced concrete roof slab above the office portion of a 40-storey high office tower
(3) A steel footbridge with 1.1m parapet connecting two residential towers inside a private residential development
(4) A 1500 sq. m. by 4.5m high single storey steel building for industrial use, with all sides setback from the site boundary by 8 metres
A. (1) and (4) only
B. (2) and (3) only
C. (3) and (4) only
D. none of the above
ans: B
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[i m sure that options (1) & (4) 應該唔駛FRR
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