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| Clause | Description | Abbreviations | 
| 2.1 | The space in the SS tower that is not intended for use as a shelter. | Non-Shelter | 
| 2.1 | Building exit staircase used as SS | S/C SS | 
| 2.2.2 (a) | Height of SS measured from its FFL to the soffit of the SS ceiling slab. | SS Clear Height | 
| 2.2.2 (a) | Height of NS measured from its FFL to the soffit of the NS ceiling slab. | NS Clear Height | 
| 2.3.1 | Setback to be protected by slab/trellis at ceiling level and distance to be measured horizontally from external face of SS wall. | Setback Distance | 
| 2.3.2 (a) | The SS located below the top-most roof level | Top-most SS |