According to Construction Cost Handbook by Arcadis Hong Kong Limited 2019, the Construction Floor Area measured from drawings is defined as covered floor areas fulfilling the functional requirements of the building measured to the outside face of the external walls or external perimeter. CFA is generally measured by Quantity Surveyor for the purpose of estimation of the construction costs of a building.
It includes floor area occupied by partitions, columns, stairwells, lift
shafts, plant rooms, water tanks, balconies, utilities platforms, vertical
ducts, service floors higher than 2.2m and the like
But excludes floor areas occupied by bay windows, planters projecting from the building, and the areas covered by canopies, roof eaves and awnings.
Note: Sloping surface such as staircases, escalators and carpark ramps are to be measured flat on plan.
But excludes floor areas occupied by bay windows, planters projecting from the building, and the areas covered by canopies, roof eaves and awnings.
Note: Sloping surface such as staircases, escalators and carpark ramps are to be measured flat on plan.
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