Wood quantities
Table 47 Wood quantities: Sawn, planed and tongue & groove timber. Linear metre per square metre (excl. waste).
|
Sawn timber |
Planed timber |
T&G timber (thickness 12–33 mm) |
|||
|
Width (B) |
Width (B) |
Coverage width (C) |
|||
|
Width (B) (mm) |
Wood quantity (lm/m2) |
Width (B) (mm) |
Wood quantity (lm/m2) |
Width (C) (mm) |
Wood quantity (lm/m2) |
|
50 |
20.00 |
45 |
22.22 |
– |
– |
|
63 |
15.87 |
58 |
17.24 |
– |
– |
|
75 |
13.33 |
70 |
14.29 |
60 |
16.67 |
|
100 |
10.00 |
95 |
10.53 |
85 |
11.76 |
|
125 |
8.00 |
120 |
8.33 |
110 |
9.09 |
|
150 |
6.67 |
145 |
6.90 |
135 |
7.41 |
|
175 |
5.71 |
170 |
5.88 |
160 |
6.25 |
|
200 |
5.00 |
195 |
5.13 |
– |
– |
|
225 |
4.44 |
220 |
4.55 |
– |
– |
|
250 |
4.00 |
245 |
4.08 |
– |
– |
Example: Tongue & groove timber
A wall area of 10 m2 is to be clad in tongue & groove boards that have a coverage width of 85 mm.
The amount needed will be 11.76 lm/m2, i.e. 10 m2 x 11.76 = 117.6 lm (excl. waste)..
Table 48 Wood quantities: Board and batten: back board and cover batten or board on board: back board and front board, 20 mm overlap
Linear metre per square metre (excl. waste).
|
Back board (BB)/Cover batten (CB) |
||||
|
Width (mm) |
Wood quantity (lm/m2) |
|||
|
BB |
70 |
CB |
45 |
13.33 |
|
BB |
95 |
CB |
45 |
10.00 |
|
BB |
120 |
CB |
45 |
8.00 |
|
BB |
145 |
CB |
45 |
6.67 |
|
BB |
170 |
CB |
45 |
5.71 |
|
Back board (BB)/Front board (FB) |
||||
|
Width (mm) |
Wood quantity (lm/m2) |
|||
|
BB |
70 |
FB |
70 |
10.00 |
|
BB |
95 |
FB |
70 |
8.00 |
|
BB |
95 |
FB |
95 |
6.67 |
|
BB |
120 |
FB |
70 |
6.67 |
|
BB |
120 |
FB |
95 |
5.71 |
|
BB |
120 |
FB |
120 |
5.00 |
|
BB |
145 |
FB |
70 |
5.71 |
|
BB |
145 |
FB |
95 |
5.00 |
|
BB |
145 |
FB |
120 |
4.44 |
|
BB |
145 |
FB |
145 |
4.00 |
|
BB |
170 |
FB |
70 |
5.00 |
|
BB |
170 |
FB |
95 |
4.44 |
|
BB |
170 |
FB |
120 |
4.00 |
|
BB |
170 |
FB |
145 |
3.64 |
|
BB |
170 |
FB |
170 |
3.33 |
Example: Board on board: back board (BB) and front board (FB)
A wall area of 20 m2 is to be clad in board on board, with back boards (BB) 22 x 145 and front boards (FB) 22 x 120.
The amount needed will be 4.44 lm/m2 of each size, i.e. 20 m2 x 4.44 = 88.8 lm of 22 x 145 and 88.8 lm of 22 x 120 (excl. waste).
Table 49 Wood quantities: Studs, counter battens, battens. etc
Linear metre per square metre (excl. waste).
|
Centre spacing (mm) |
Wood quantity (lm/m2) |
|
200 |
5.00 |
|
300 |
3.33 |
|
400 |
2.50 |
|
500 |
2.00 |
|
600 |
1.67 |
|
800 |
1.25 |
|
1,000 |
1.00 |
|
1,200 |
0.83 |
Note
The length of one stud or batten must be added to the total linear metres (lm).
Example: Vertical studs
Vertical studs with a centre-spacing of 600 mm, for a wall area of height 3 m and length 12 m.
The amount needed will be 1.67 lm/m2, i.e. 3 x 12 = 36 m2 x 1.67 = 60.12 lm + height 3 m = 63.12 lm (excl. waste).
Example: Horizontal nailing battens
Horizontal nailing battens with a centre-spacing of 600 mm, for a wall area of height 3 m and length 12 m.
The amount needed will be 1.67 lm/m2, i.e. 3 x 12 = 36 m2 x 1.67 = 60.12 lm + height 12 m = 72.12 lm (excl. waste).
Table 50 Wood quantities: Fencing
No. of pickets or boards per linear metre (excl. waste).
|
Width of pickets (mm) |
Picket spacing (mm) |
||||||||||||||
|
|
0 |
20 |
30 |
40 |
50 |
60 |
70 |
80 |
90 |
100 |
110 |
120 |
130 |
140 |
150 |
|
|
Wood quantity (lm/m) |
||||||||||||||
|
45 |
22.22 |
15.39 |
13.33 |
11.76 |
10.53 |
9.52 |
8.70 |
8.00 |
7.41 |
6.90 |
6.45 |
6.06 |
5.71 |
5.41 |
5.13 |
|
70 |
14.29 |
11.11 |
10.00 |
9.09 |
8.33 |
7.69 |
7.14 |
6.67 |
6.25 |
5.88 |
5.56 |
5.26 |
5.00 |
4.76 |
4.55 |
|
95 |
10.53 |
8.70 |
8.00 |
7.41 |
6.90 |
6.45 |
6.06 |
5.71 |
5.41 |
5.13 |
4.88 |
4.65 |
4.44 |
4.26 |
4.08 |
|
120 |
8.33 |
7.14 |
6.67 |
6.25 |
5.88 |
5.56 |
5.26 |
5.00 |
4.76 |
4.55 |
4.35 |
4.17 |
4.00 |
3.85 |
3.70 |
|
145 |
6.90 |
6.06 |
5.71 |
5.41 |
5.13 |
4.88 |
4.65 |
4.44 |
4.26 |
4.08 |
3.92 |
3.77 |
3.64 |
3.51 |
3.39 |
|
170 |
5.88 |
5.26 |
5.00 |
4.76 |
4.55 |
4.35 |
4.17 |
4.00 |
3.85 |
3.70 |
3.57 |
3.45 |
3.33 |
3.23 |
3.13 |
Note
The amount of waste varies a great deal depending on the length of the pickets.
Example: Vertical pickets
The width of the pickets is 95 mm, the spacing between them is 20 mm, their length is 0.80 m and the fence is 40 m long.
The number of pickets per linear metre is 8.70.
The amount needed will be 0.80 x 40 x 8.70 = 278.4 lm (excl. waste).
Example: Horizontal boards
The width of the boards is 45 mm, the spacing between them is 20 mm, and the fence is 0.8 m high and 40 m long.
The number of boards per linear metre is 15.39.
The amount needed will be 0.80 x 40 x 15.39 = 492.5 lm (excl. waste).
Table 51 Wood quantities and minimum edge-to-edge spacing: Decking
No. of linear metres per square metre (excl. waste)
|
Type of decking |
Width (mm) |
Edge-to-edge spacing (mm) |
Wood quantity (lm/m2) |
|
Treated pine decking Wood preservation class: NTR A or NTR AB Colour: green or brown |
45 |
48 |
20.83 |
|
70 |
74 |
13.51 |
|
|
95 |
100 |
10.00 |
|
|
120 |
126 |
7.94 |
|
|
145 |
152 |
6.58 |
|
|
Untreated heartwood decking Wood species: pine or larch |
120 |
126 |
7.94 |
|
145 |
152 |
6.58 |
|
|
Impregnated and linseed oil, pressure and heat pigmented decking, e.g. using the Royal method. |
95 |
100 |
10.00 |
|
120 |
126 |
7.94 |
|
|
145 |
152 |
6.58 |
|
|
Heat-treated decking |
92 |
95 |
10.53 |
|
105 |
109 |
9.17 |
|
|
118 |
122 |
8.20 |
|
|
142 |
147 |
6.80 |
|
|
Acetylated decking |
140 |
143 |
6.99 |
|
190 |
193 |
5.18 |
|
|
195 |
198 |
5.05 |
|
|
Furfurylated decking |
95 |
101 |
9.90 |
|
120 |
125 |
8.00 |
|
|
145 |
151 |
6.62 |
|
|
Silicon treated decking |
95 |
100 |
10.00 |
|
120 |
127 |
7.87 |
|
|
145 |
154 |
6.49 |
|
|
170 |
181 |
5.53 |
|
|
Western red cedar (Thuja plicata) decking |
141 |
147 |
6.80 |
|
193 |
202 |
4.95 |
Example: Treated decking
A deck of 40 m2 is to be laid with treated decking, wood preservation class NTR AB, that has a width of 120 mm and will be installed with an edge-to-edge spacing of 126 mm. The amount needed will be 7.94 lm/m2, i.e. 40 2 x 7.94 = 317.6 lm (excl. waste).
Villa Moelven, Älgö.
