1. Wall-to-floor ratios

2. • Go to unit 9 and download the wall-to-floor ratio ppt
• Read through the ppt and complete the task for building B
• Name your file wall to floor ratio and Submit your ppt to
moodle unit 9 under the link “Submit wall floor ration ppt
here”

6. Wall-to-floor ratios
The following activity asks you to look at the wall-to-floor ratios and form a
financial comparison between two designs. The smaller the ratio the more floor
space is created which in financial terms for a client would be rentable areas.
Building A
Plan area = 35m x 35m
Height = 35m
Storey height = 3.5m
Building B
Plan area = 22.5m x 22.5m
Height = 24.75m
Storey height = 2.75m
If the floor budget construction cost is £50/m2 and the wall area construction cost £25/m2,
calculate the wall to floor ratio for both buildings.

7. • Find : The Wall-to-floor ratios
• Worked example Building A
• Number of floors = 35/3.5 = 10 floors
• Total floor area = 10 x 35 x 35 = 12,250m2
• Total wall area = 35 x 4 x 35 = 4900m2
• Total wall cost = 4900 x £25/m2 = £122,500
• Total floor cost = 12,250 x £50/ m2 = £612,500
• Wall/floor ratio = £122,500 = 0.20
• Building B
• Number of floors = 24.75/2.75 = ? floors
• Total floor area = 9 x 22.5 x 22.5 = ? m2
• Total wall area = 24.75 x 4 x 22.5 = ? m2
• Total wall cost = 1114 x £25/m2 = ? £
• Total floor cost = 4556 x £50/m2 = ? £
• Wall/floor ratio = ? £ = What amount a decinal