Logowanie do poczty

Preferred sizes of poles (according to BS 1990: 1 1984)


Straightness

Slope of grain

Moisture content

Preservation

Timbers

Table 1 – Preferred sizes of poles

 Light polesMedium poles
Nominal
lenght
*
Diameter
at top
Minimum
diameter at 1,5 m
from butt end
Diameter
at top
Minimum
diameter at 1,5 m
from butt end
min.
max.
 min.
max.
 
m
mm
mm
mm
mm
mmmm
8
8.5
9
125
125
125
150
150
150
170
180
180
145
150
150
180
180
180
210
215
220

NOTE:

  • Maximum top diameters are given only to indicate the range of tapper to be expected
   * Tolerance of length +/- 1%


Table 2 – Ultimate loads for unstayed poles of redwood (pine)

 Light polesMedium poles
Nominal
lenght
Minimum
diameter at 1,5 m
from butt end
Ultimate loads at 0,6 m from top
Load per millimetre of deflection at point of application of load
Minimum
diameter at 1,5 m
from butt end
Ultimate loads at 0,6 m from top
Load per millimetre of deflection at point of application of load
mmm
kN
N
mm
kN
N

8
8.5
9

170
180
180
4.40
4.81
4.46
4.8
4.5
3.6
210
215
220
8.29
8.20
8.15
10.5
9.1
7.8

 

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