Highrise Services Calculation 2

Second of all, these are the general information that you have to have.

1. Proposed quantity of floors
2. Area of every floor
3. Area designated per person
4. Number of occupants
5. Groos Floor Area (GFA)
6. Net Lettable Area (NLA)
7. Number of occupants per floor

Example,
1. 34 storeys
2. 1723.60m²
3. 10m²
4. 4102 person
5. 58602.32m²
6. 41021.62m²
7. 121 person

1. Num. of passengers in one lift cart

75 % x number of occupants
Example,
= 75% x 4102
= 3077 people

2. Num. of passenger in one lift cart within 30 minutes

(30 minutes x 60 seconds x assumed number of person per lift) / 105
(assume 15 people per lift (65kg per person))
Example,
= (30 x 60 x 15) / 105
= 257 people

2. Num. of lift required

Number of person in one lift cart / number of passenger in one lift cart within 30 minutes
Example,
= 3077 / 257
= 12 lifts

3. Size of AHU per floor

(2.5 % x GFA) / Quantity of floors
Example,
=(2.5% x 58602.32m²) / 34
= 43.08m²

4. Plant Room

3% x NLA
Example,
= 3% x 41021.62m²
= 1230.65m²

5. Usage per Floor

Number of occupants per floor x 40 liters
(assume 40 liters per person for 24 hours)
(assume 20 liters for sanitary)
Example,
= 121 x 40 liters
= 4840 liters

6. Usage of water for the whole building

Usage per floor x Quantity of floors
= 4840 liters x 34
= 164560 liters
= 165 cubic / 1.2
= 137.5m²

7. Backup for water supply

(usage per floor x 10 hours) / 24 hours
Example,
=(164560 x 10) / 24
= 68566.67 liters

8. Total water supply

Usage of water per building + backup water supply
Example,
164560 liters + 68566.67 liters
=233126.67 liters

9. Suction tank

1/3 of total water supply
Example,
= 1/3 x 233126.67 liters
= 77708.89 liters
= 78 cubic/1.2
= 65m²

10. Water tank

2/3 of total water supply
Example,
= 2/3 x 233126.67 liters
= 155417.78 liters
= 155 cubic / 1.2
= 129.17m²

11. Fire Fighting

a) Wet Riser Tank
= 45000 liters (2 stage)

1st stage (Basement)
= 1/3 of wet riser tank
= 1/3 x 45000 liters
= 15000 liters
= 15 cubic/1.2
= 12.5m²

2nd Stage (Roof Top)
= 2/3 x 45000 liters
= 30000 liters
= 30 cubic / 1.2
= 25 m²

b) Sprinkler Tank
= 45000 liters
= 45 cubic / 1.2
= 37.5m²

c) Hose Reel Tank
= 45000 liters
= 45 cubic / 1.2
= 37.5m²

*Note that this calculation is just a general guideline, it DOES NOT have to be precisely followed.