Ledges

Air-Conditioner Ledges

Air-conditioner (A/C) ledges that are included as strata area will be computed as GFA. The extent of GFA demarcation for the AC ledge will align with the strata area boundary, regardless of the position of the vertical railings or screens on the AC ledge.

Non-strata AC ledges not exceeding 2.0m in width (as measured perpendicularly from the external wall) are not computed as GFA. For non-strata AC ledges exceeding 2.0m in width, the area to be excluded from GFA is only up to 2.0m in width.

All AC ledges should continue to comply with BCA’s design for maintainability guidelines to ensure that they are adequately sized for ease of downstream maintenance.

Air-Conditioner Ledges

Reinforced Concrete Ledge for Sun Shading or Firefighting Purposes

Reinforced Concrete (RC) ledges meant for sun-shading or firefighting purposes (i.e. firemen's ledges) are excluded from GFA if they comply with the following requirements:

• Does not exceed 2.0m in width;

• No railing or parapet wall; and

• Located at the external façade.

For RC ledges exceeding 2.0m in width, the area to be excluded from GFA is only up to 2.0m in width.