8/11/08



WEATHERBOARDS

EXERCISE 3



Specifications


Wall height is 2700
Windows 1&5 1200 high
Windows2,3&4 1100 high
Window 6 950 high
Doors 1&2 2100 high

Cover of weatherboards is 205mm

Allow 7% waste (all measurements obtained from house plan on page 31 of book "CLADDINGS AND LININGS")

Cost of board is $ 2.20 per metre

STEP 1
Perimeter
9690 + 5908 x 2 = 31.196metres

STEP 2
Gross area
31.196 x (wall hieght) 2.7 = 84.2292 square metres

STEP 3
Total area of openings
(1500 x 1200) x 2 =3.6 sqm
(1200 x 1200) x2 = 2.64 sqm
1800 x 1100 =1.98 sqm
1800 x 950 = 1.71 sqm
900 x 2100 = 1.89 sqm
=11.82 square metres

STEP 4
Nett area
84.2292 - 11.82 = 72.4092 square metres

STEP 5
coverage of the boards
1000 / 205 = 4.878m

STEP 6
metres of boards required
72.4092 x 4.878 = 353.22 lm

STEP 7
add for waste
353.22 x 1.07 = 377. 94

STEP 8
Total cost
377.94 x $2.20 = $831.47