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7.2.1 Permitted Works in SS
a. Laying of floor tiles bonded to wet cement mortar. The total thickness of floor finishes and screed is not to exceed 50mm.
b. Laying of floor skirting tiles (up to a maximum of 100mm high) by bonding them with wet cement mortar to SS walls.
c. Laying of vinyl or linoleum flooring is permitted in SS but not permitted in S/C SS or scissor S/C SS.
d. Applying splatter dash or equivalent to the external face of SS walls only to provide rough surface for feature wall panels or wall tiles installation.
e. Painting of walls, ceiling or door. In the case of SS door, owners shall not cover up or paint over the SS door notice (See Clause 5.3), locking bolts or door seal. The old paint coat on door and door frame is to be removed prior to repainting to avoid increase in paint thickness resulting in difficulty in closing and opening of the door. The new paint coat must be dried up completely before closing the door as wet or damp paint will cause the door/rubber gasket to stick onto the door frame when opening the closed door.
f. Painting on only the exterior face of the 10mm fragmentation stainless steel plate of the ventilation sleeves.
g. Drilling into internal face of SS walls and ceiling slabs to a depth of not more than 50mm to affix inserts and removable screws is permitted in SS but not permitted in S/C SS or scissor S/C SS. Fixtures such as pictures, posters, cabinets or shelves mounted on the internal face of SS walls will have to be removed by the owners within 48 hours upon notification. There is no restriction to the diameter of the non- metallic insert as long as it does not exceed 50mm in length. It is the owner’s responsibility to ensure that the strength of the insert is adequately provided for the intended purpose.
h. Power driven nails are allowed only on external face of the SS walls to facilitate flexibility in mounting of features/fixtures by owners.
i. Removal of the fragmentation plates (Clause 4.4) covering the ventilation openings is permitted for SS but not permitted in S/C SS or scissor S/C SS. The removal of fragmentation for SS shall comply with the following conditions:
i. The plates (after removal) shall be securely mounted with removable screws on non-metallic inserts not exceeding 50mm deep on one of the internal face of SS walls.
ii. After the removal of plates, the bolts and nuts shall be installed back to their original positions on the ventilation sleeves.
iii. Closing or covering up of ventilation openings by removable aesthetic or architectural finishes is allowed, provided that at least 25% of the total area of the two openings shall be left uncovered for ventilation purposes during peacetime.
j. The minimum clearance from the fragmentation plate to RC beam or structure or service shall be 50mm. Where RC beam or structure or service is fronting the fragmentation plate of ventilation sleeve, the clear distance between them shall be at least 500mm. Refer to FIGURE 4.3.1(a).
k. Where false ceilings, which are provided on the exterior of the SS, are to be installed at a level below the ventilation sleeves, there shall be one perforated access panel of a minimum size of 600mm x 600mm to be provided directly below each ventilation sleeve. Refer to FIGURE 4.3.2.
7.2.2 Not Permitted Works in SS
a. Laying of wall tiles or spray of rock tone finish, cement sand finish and gypsum plastering on the internal faces of SS walls.
b. Laying of floor tiles using adhesive materials.
c. Laying of 2nd layer of tiles on floor or skirting tiles.
d. Installation of cornices within the SS.
e. Installation works with fixings using power driving nails into the internal SS walls
f. Tampering with, removing or covering up of the SS door notice. The SS door notice provides important information to the occupants on the use of the SS.
g. Hacking and drilling of SS walls, floor slabs, and ceiling slabs without prior approval from the Commissioner of Building Control, other than drilling permitted in Clause 7.2.1(g) and 7.2.1(h) and shall not exceed 50mm.
h. Hacking to both internal and external face of the SS walls to form key for tiling.
i. Hacking on external face of SS wall for mounting of feature wall panels or wall tiles installation.
j. Modifying, changing, removing or tampering of SS door without prior approval from the Commissioner of Building Control.
k. Modifying, altering or tampering with any part of the ventilation openings, plates and the mounting devices such as bolts and nuts without prior approval from the Commissioner of Building Control.
l. Painting to the interior face of the 10mm fragmentation stainless steel plate of the ventilation sleeves, the ventilation sleeves, “O” ring rubber gaskets and the four or eight numbers of stainless steel bolts which hold the steel plate to the sleeves.
7.2.3 Not Permitted Works in NS
a. Hacking and drilling of NS walls, floor slabs, and ceiling slabs without prior approval from the Commissioner of Building Control, other than drilling into NS walls and ceiling slab to affix removable screws on inserts, provided the depth of the insert shall not exceed 50mm.
b. Modifying, changing, removing or tampering of SS door without prior approval from the Commissioner of Building Control.
