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Clause 3.1 General Clause 3.2 Materials Clause 3.3 Analysis Clause 3.4 Member Dimensions and Reinforcement Requirements Clause 3.5 Detailing of SS Tower Clause 3.6 Penetration Of Services

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Clause 3.2 Materials

TRSS 2021

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3.2.1 Concrete

The minimum grade of concrete for all SS/NS structures shall be C32/40. Concrete used in SS/NS structures (including hollow core and joints), as well as concrete used for structures within shelter setback distance, should be of normal concrete density (2400kg/m3) and consists of 20mm nominal maximum size coarse aggregate. The use of pre-stressed concrete for SS wall/slab and NS wall/slab in the SS, S/C SS or scissor S/C SS tower is not permitted.

3.2.2 Steel Reinforcement

The steel reinforcement in SS/NS wall and slab shall be welded steel fabric mesh for steel bar diameter of up to 16mm and hot rolled steel bars. The minimum yield stress of main reinforcement bars and shear links in the structural elements forming the SS, S/C SS or scissor S/C SS or NS shall be minimum 500 N/mm2.