Original Version
Rule 48.1 & Table 5
48.1 Wood
Values used for moduli of rupture for wood in bending, in conjunction
with safety factors given in Rule 44, shall not exceed those shown in Table
5.
Table 5 

Species 
Modulus of rupture in bending 

Sawed rectangular poles, crossarm, etc. (a) 
Round Poles 

Cedar, western red 
4,700 lbs. Per sq in 
5,600 lbs. Per sq in 
Douglas fir, dense 
6,300 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Douglas fir, not dense 
5,800 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Fir, white or red, local 
4,700 lbs. Per sq in 
5,600 lbs. Per sq in 
Pine, southern yellow, dense 
6,300 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Pine, southern yellow, not dense 
5,800 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Redwood, virgin 
5,300 lbs. Per sq in 
6,200 lbs. Per sq in 
Redwood, second growth 
3,900 lbs. Per sq in 
4,600 lbs. Per sq in 
(a)
Figures given are for select structural
grade of material under short time loading with the neutral plane parallel
to a side. Multiply the values shown by 1.4 where the neutral plane
is on the diagonal of a square. Multiply the given values by 0.55 where
the loading being considered is a long time loading (continuous load for
one year or more).
(b) Where poles meet specifications of American Standards Association, 05.61941 for Douglas Fir Poles (creosoted) and 05.41941 for southern Pine Poles (creosoted), this value may be increased to not more than 7,400 lbs. Per square inch.
Strikeout and Underline Version
Rule 48.1 & Table 5
48.1 Wood
Values used for moduli of rupture for wood in bending, in conjunction
with safety factors given in Rule 44, shall not exceed those shown in Table
5.
Table 5 

Species 
Modulus of rupture in bending 

Sawed rectangular poles, crossarm, etc. (a) 
Round Poles 

Cedar, western red 
4,700 lbs. Per sq in 
6,000 
Douglas fir, dense 
6,300 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Douglas fir, not dense 
5,800 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Fir, white or red, local 
4,700 lbs. Per sq in 
5,600 lbs. Per sq in 
Pine, southern yellow, dense 
6,300 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Pine, southern yellow, not dense 
5,800 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Redwood, virgin 
5,300 lbs. Per sq in 
6,200 lbs. Per sq in 
Redwood, second growth 
3,900 lbs. Per sq in 
4,600 lbs. Per sq in 
(a)
Figures given are for select structural
grade of material under short time loading with the neutral plane parallel
to a side. Multiply the values shown by 1.4 where the neutral plane
is on the diagonal of a square. Multiply the given values by 0.55 where
the loading being considered is a long time loading (continuous load for
one year or more).
(b)
Where poles meet specifications of American Standards
Association, 05.11963 05.61941 for Douglas
Fir Poles (creosoted) and 05.41941
for southern Pine Poles (creosoted), this value may be increased to not
more than 8,000 7,400 lbs. Per square inch.
Such poles shall be suitable preservative treatment.
Final Version
Rule 48.1 & Table 5
48.1 Wood
Values used for moduli of rupture for wood in bending, in
conjunction with safety factors given in Rule 44, shall not exceed those
shown in Table 5.
Table 5 

Species 
Modulus of rupture in bending 

Sawed rectangular poles, crossarm, etc. (a) 
Round Poles 

Cedar, western red 
4,700 lbs. Per sq in 
6,000 lbs. Per sq in 
Douglas fir, dense 
6,300 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Douglas fir, not dense 
5,800 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Fir, white or red, local 
4,700 lbs. Per sq in 
5,600 lbs. Per sq in 
Pine, southern yellow, dense 
6,300 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Pine, southern yellow, not dense 
5,800 lbs. Per sq in 
6,800 (b) lbs. Per sq in 
Redwood, virgin 
5,300 lbs. Per sq in 
6,200 lbs. Per sq in 
Redwood, second growth 
3,900 lbs. Per sq in 
4,600 lbs. Per sq in 
(a) Figures given are for select structural
grade of material under short time loading with the neutral plane parallel
to a side. Multiply the values shown by 1.4 where the neutral plane
is on the diagonal of a square. Multiply the given values by 0.55 where
the loading being considered is a long time loading (continuous load for
one year or more).
(b)
Where poles meet specifications of American Standards
Association, 05.11963 for Douglas Fir Poles and for southern Pine
Poles this value may be increased to not more than 8,000 lbs. Per square
inch. Such poles shall be suitable preservative treatment.