Wall-to-floor ratios

• 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”

Wall-to-floor ratiosThe 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.

• 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