I. Overdimensional Vehicles
A. Legal Width
1. 8 feet 6 inches on all highways.
2. Exceptions.
a. Construction and building contractors’ equipment and vehicles used to move such equipment which does not exceed 10 feet in width when being moved by contractors or resident carriers.
b. Implements of husbandry being moved by resident farmers, ranchers, dealers, or manufacturers between sunrise and sunset. Nighttime travel is allowed provided the implements are properly lighted.
B. Legal Height
1. 14 feet whether loaded or unloaded, unless routes of travel include structures such as bridges and underpasses that are not 14 feet in height. Adequate clearance of all structures must be verified prior to moving any vehicle or equipment under any bridge or underpass.
2. Exceptions.
a. Implements of husbandry may not exceed 15 feet 6 inches in height when being moved by resident farmers, ranchers, dealers, or manufacturers between sunrise and sunset.
C. Legal Length
1. A single unit vehicle with two or more axles, including the load thereon, shall not exceed a length of 50 feet.
2. A combination of two, three, or four units, including the load thereon, shall not exceed a length of 75 feet on non-designated streets. Three and four unit combinations are subject to safety rules adopted by the Highway Commissioner.
a. The designated streets within the City of Fargo are:
1) Main Avenue between 25th and 45th Street.
2) 7th Avenue North between 25th and 45th Street.
3) 12th Avenue North between 27th and 45th Street.
4) 25th Street between 7th Avenue North and I-94.
5) 45th Street between 19th Avenue North & I-94.
Trucking firms not located adjacent to these designated streets will be allowed to use the most direct route from their terminal to access them.
3. A combination of two, three, or four units, including the load thereon, may exceed 75 feet in length but shall not exceed 110 feet in length when traveling on designated streets.
4. The length of a trailer or semitrailer, including the load thereon, may not exceed 53 feet.
5. Towing converter dollies.
a. Converter dollies that are used to convert semitrailers to trailers are considered trailers if they meet all lighting requirements and are equipped with brakes and safety chains.
b. No more than one converter dolly can be towed behind a truck-tractor, semitrailer, and trailer; and no more than two converter dollies can be towed behind a truck-tractor and semitrailer.
D. Legal Weight Limitations
1. Gross vehicle weight on residential streets.
a. The gross vehicle weight of any vehicle or combination of vehicles is determined by the following weight formula of
LN
W = 500 * ( (N -1) + 12N + 36 )
where W equals maximum weight in pounds carried on any group of two or more axles; L equals distance in feet between the extremes of any group of two or more consecutive axles; and N equals number of axles in the group under consideration except that two consecutive sets of tandem axles may carry a gross load of 34,000 pounds each, providing the overall distance between the first and last axles of the consecutive sets of tandem axles is at least 36 feet.
b. The maximum gross vehicle weight on the residential street system is 80,000 pounds.
2. Gross vehicle weight on the truck route system. (See Appendix A)
a. The gross vehicle weight of any vehicle or combination of vehicles is determined by the following weight formula of
LN
W = 500 * ( (N -1) + 12N + 36 )
where W equals the maximum gross weight in pounds on any vehicle or combination of vehicles; L equals distance in feet between the two extreme axles of any vehicle or combination of vehicles; and N equals the number of axles of any vehicle or combination of vehicles under consideration.
b. The maximum gross vehicle weight on City truck routes is 105,500 pounds unless otherwise posted. On all other streets the maximum gross vehicle weight is 80,000 pounds unless designated for more.
3. Axle weight.
a. No single axle shall carry a gross weight in excess of 20,000 pounds. Axles spaced 40 inches or less apart are considered one axle. Axles spaced 8 feet apart or over are considered as individual axles. (The gross weight of two individual axles may not exceed 40,000 pounds on highways other than the residential street system.) On the residential street system the gross weight of two individual axles may be restricted by the weight formula. Spacing between axles shall be measured from axle center to axle center.
b. Axles spaced over 40 inches apart and less than 8 feet apart shall not carry a gross weight in excess of 17,000 pounds per axle. The gross weight of three or more axles in a grouping may not exceed 48,000 pounds on highways other than the residential street system. On the residential street system the gross weight of three or more axles is restricted by the weight formula.
c. During the spring breakup season or on otherwise posted streets reductions in the above axle weights may be specified. Axle weights may also be reduced by the bridge load limitations map.
4. Wheel weight.
a. The weight in pounds on any one wheel shall not exceed one-half the allowable axle weight. Dual tires are considered one wheel.
5. Tire weight.
a. The weight per inch width of tire shall not exceed 550 pounds. The width of tire for solid tires shall be the rim width; for pneumatic tires, the manufacturer’s width. Metric tire sizes are converted to inches by dividing millimeters by 25.4
Computed to nearest foot by the weight formula in Section 39-12-05 and Section 39-12-05.3 of the North Dakota Century Code.
W = Maximum weight in pounds on any group of two or more axles
L = Distance in feet between extremes of any group of two or more consecutive axles
N = Number of axles in group under consideration
Axle Weight Limitations Chart
LN
W = 500 * ( (N-1) +12N + 36)
Distance in feet between
the extremes of any groups of
2 or more consecutive axles
MAXIMUM LOAD IN POUNDS CARRIED ON ANY GROUP OF 2 OR MORE CONSECUTIVE AXLES
|
|
2 Axles
|
3 Axles
|
4 Axles
|
5 Axles
|
6 Axles
|
7 Axles
|
8 Axles
|
9 Axles
|
| 4 |
34,000 |
|
|
|
|
|
|
|
| 5 |
34,000 |
|
|
|
|
|
|
|
| 6 |
34,000 |
|
|
|
|
|
|
|
| 7 |
34,000 |
41,500 |
|
|
|
|
|
|
| 8 |
38,000 |
42,000 |
|
|
|
|
|
|
| 9 |
39,000 |
43,000 |
|
|
|
|
|
|
| 10 |
40,000 |
43,500 |
|
|
|
|
|
|
| 11 |
|
44,500 |
|
|
|
|
|
|
| 12 |
|
45,000 |
50,000 |
|
|
|
|
|
| 13 |
|
46,000 |
50,500 |
|
|
|
|
|
| 14 |
|
46,500 |
51,500 |
|
|
|
|
|
| 15 |
|
47,500 |
52,000 |
|
|
|
|
|
| 16 |
|
48,000 |
52,500 |
58,000 |
|
|
|
|
| 17 |
|
49,000 |
53,500 |
58,500 |
|
|
|
|
| 18 |
|
49,500 |
54,000 |
59,500 |
|
|
|
|
| 19 |
|
50,500 |
54,500 |
60,000 |
|
|
|
|
| 20 |
|
51,000 |
55,500 |
60,500 |
66,000 |
|
|
|
| 21 |
|
52,000 |
56,000 |
61,000 |
66,500 |
|
|
|
| 22 |
|
52,500 |
56,500 |
62,000 |
67,000 |
|
|
|
| 23 |
|
53,500 |
57,500 |
62,500 |
68,000 |
|
|
|
| 24 |
|
54,000 |
58,000 |
63,000 |
68,500 |
74,000 |
|
|
| 25 |
|
55,000 |
58,500 |
63,500 |
69,000 |
74,500 |
|
|
| 26 |
|
55,500 |
59,500 |
64,500 |
69,500 |
75,000 |
|
|
| 27 |
|
56,500 |
60,000 |
65,000 |
70,000 |
76,000 |
|
|
| 28 |
|
57,000 |
60,500 |
65,500 |
71,000 |
76,500 |
82,000 |
|
| 29 |
|
58,000 |
61,500 |
66,000 |
71,500 |
77,000 |
82,500 |
|
| 30 |
|
58,500 |
62,000 |
67,000 |
72,000 |
77,500 |
83,000 |
|
| 31 |
|
59,500 |
62,500 |
67,500 |
72,500 |
78,000 |
84,000 |
|
| 32 |
|
60,000 |
63,500 |
68,000 |
73,000 |
78,500 |
84,500 |
90,000 |
| 33 |
|
|
64,000 |
68,500 |
74,000 |
79,500 |
85,000 |
90,500 |
| 34 |
|
|
64,500 |
69,500 |
74,500 |
80,000 |
85,500 |
91,000 |
| 35 |
|
|
65,500 |
70,000 |
75,000 |
80,500 |
86,000 |
91,500 |
| 36 |
|
|
66,000 |
70,500 |
75,500 |
81,000 |
86,500 |
92,500 |
| 37 |
|
|
66,500 |
71,000 |
76,000 |
81,500 |
87,000 |
93,000 |
| 38 |
|
|
67,500 |
72,000 |
77,000 |
82,000 |
87,500 |
93,500 |
| 39 |
|
|
68,000 |
72,500 |
77,500 |
83,000 |
88,500 |
94,000 |
| 40 |
|
|
68,500 |
73,000 |
78,000 |
83,500 |
89,000 |
94,500 |
Two consecutive sets of tandem isles may carry a gross load of 34,000
pounds each provided the overall distance between the first and last axles of
such consecutive sets of tandem axles is 36 feet or more. |
| 41 |
|
|
69,500 |
73,500 |
78,500 |
84,000 |
89,500 |
95,000 |
| 42 |
|
|
70,000 |
74,500 |
79,000 |
84,500 |
90,000 |
95,500 |
| 43 |
|
|
70,500 |
75,000 |
80,000 |
85,000 |
90,500 |
96,000 |
| 44 |
|
|
71,500 |
75,500 |
80,500 |
85,500 |
91,000 |
97,000 |
| 45 |
|
|
72,000 |
76,000 |
81,000 |
86,500 |
91,500 |
97,500 |
| 46 |
|
|
72,500 |
77,000 |
81,500 |
87,000 |
92,500 |
98,000 |
| 47 |
|
|
73,500 |
77,500 |
82,000 |
87,500 |
93,000 |
98,500 |
| 48 |
|
|
74,000 |
78,000 |
83,000 |
88,000 |
93,500 |
99,000 |
| 49 |
|
|
74,500 |
78,500 |
83,500 |
88,500 |
94,000 |
99,500 |
| 50 |
|
|
75,500 |
79,500 |
84,000 |
89,000 |
94,500 |
100,000 |
| 51 |
|
|
76,000 |
80,000 |
84,500 |
90,000 |
95,000 |
100,500 |
| 52 |
|
|
76,500 |
80,500 |
85,000 |
90,500 |
95,500 |
101,500 |
| 53 |
|
|
77,500 |
81,000 |
86,000 |
91,000 |
96,500 |
102,000 |
| 54 |
|
|
78,000 |
82,000 |
86,500 |
91,500 |
97,000 |
102,500 |
| 55 |
|
|
78,500 |
82,500 |
87,000 |
92,000 |
97,500 |
103,000 |
| 56 |
|
|
79,500 |
83,000 |
87,500 |
92,500 |
98,000 |
103,500 |
| 57 |
Gross weight limit |
80,000 |
83,500 |
88,000 |
93,500 |
98,500 |
104,000 |
| 58 |
on residential |
|
84,500 |
89,000 |
94,000 |
99,000 |
104,500 |
| 59 |
streets |
|
85,000 |
89,500 |
94,500 |
99,500 |
105,000 |
| 60 |
|
|
|
85,500 |
90,000 |
95,000 |
100,500 |
105,500 |
| 61 |
|
|
|
86,000 |
90,500 |
95,500 |
101,000 |
|
| 62 |
|
|
|
87,000 |
91,000 |
96,000 |
101,500 |
|
| 63 |
|
|
|
87,500 |
92,000 |
97,000 |
102,000 |
|
| 64 |
|
|
|
88,000 |
92,500 |
97,500 |
102,500 |
|
| 65 |
|
|
|
88,500 |
93,000 |
98,000 |
103,000 |
|
| 66 |
|
|
|
89,500 |
93,500 |
98,500 |
103,500 |
|
| 67 |
|
|
|
90,000 |
94,000 |
99,000 |
104,500 |
|
| 68 |
|
|
|
90,500 |
95,000 |
99,500 |
105,000 |
|
| 69 |
|
|
|
91,000 |
95,500 |
100,500 |
105,500 |
|
| 70 |
|
|
|
92,000 |
96,000 |
101,000 |
|
|
| 71 |
|
|
|
92,500 |
96,500 |
101,500 |
|
|
| 72 |
|
|
|
93,000 |
97,000 |
102,000 |
|
|
| 73 |
|
|
|
93,500 |
98,000 |
102,500 |
|
|
| 74 |
|
|
|
94,500 |
98,500 |
103,000 |
|
|
| 75 |
|
|
|
95,000 |
99,000 |
104,000 |
|
|
| 76 |
|
|
|
95,500 |
99,500 |
104,500 |
|
|
| 77 |
|
|
|
96,000 |
100,000 |
105,000 |
|
|
| 78 |
|
|
|
97,000 |
101,000 |
105,500 |
|
|
| 79 |
|
|
|
97,500 |
101,500 |
|
|
|
| 80 |
|
|
|
98,000 |
102,000 |
|
|
|
| 81 |
|
|
|
98,500 |
102,500 |
|
|
|
| 82 |
|
|
|
99,500 |
103,000 |
|
|
|
| 83 |
|
|
|
100,000 |
104,000 |
|
|
|
| 84 |
|
|
|
|
104,500 |
|
|
|
| 85 |
|
|
|
|
105,000 |
|
|
|
| 86 |
|
|
|
|
105,500 |
|
|
|
NOTE: On highways other than the residential street system, only the exterior bridge measurement shall be used to determine the gross vehicle weight of a vehicle or combination of vehicles.
City of Fargo Axle Weight Limitations
No Single axle shall carry a gross weight in excess of 20,000 pounds. Axles spaced 40 inches or less apart are considered one axle. Axles spaced 8 feet apart or over are considered as individual axles. The gross weight of two individual axles may be restricted by the weight formula except that on highways other than the residential streets, two axles spaced 8 feet apart or more may have a combined gross weight not to exceed 40,000 pounds. Spacing between axles shall be measured from axle center to axle center.
Axles spaced over 40 inches apart and less than 8 feet apart shall not carry a gross weight in excess of 17,000 pound per axle. The gross weight of three or more axles in a grouping is determined by the measurement between the extreme axle centers except that on the truck route system, groupings of three or more axles may have a gross weight not to exceed 48,000 pounds.
Examples of Bridge Formula Application
Tire Width Limitations
The weight per inch width of tire shall not exceed 550 pounds. Metric tire sizes are converted to inches by dividing millimeters by 25.4. The width of tier for solid tires shall be the rim width. For pneumatic tires the width of tire shall be the manufacturer's width. The weight in pounds on any one wheel shall not exceed one-half the allowable axle weight. Dual tires are considered one wheel.
|
|
Single Axle |
Tandem Axle |
Triple Axle |
| Tire Width |
(2 Tires) |
(4 Tires) |
(4 Tires) |
(8 Tires) |
(6 Tires) |
(12 Tires) |
| 7:00 |
7,700 |
15,400 |
15,400 |
30,800 |
23,100 |
|
| 7:50 |
8,250 |
16,500 |
16,500 |
33,000 |
24,750 |
|
| 8:00 |
8,800 |
17,600 |
17,600 |
34,000 |
26,400 |
|
| 8:25 |
9,075 |
18,150 |
18,150 |
34,000 |
27,225 |
|
| 9:00 |
9,900 |
19,800 |
19,800 |
34,000 |
29,700 |
|
| 10:00 |
11,000 |
20,000 |
22,000 |
34,000 |
33,000 |
|
| 11:00 |
12,100 |
20,000 |
24,200 |
34,000 |
|
|
| 12:00 |
13,200 |
20,000 |
26,400 |
34,000 |
|
|
| 13:00 |
14,300 |
20,000 |
28,600 |
34,000 |
|
|
| 14:00 |
15,400 |
20,000 |
30,800 |
34,000 |
|
|
| 15:00 |
16,500 |
20,000 |
33,000 |
34,000 |
|
|
| 16:50 |
18,150 |
20,000 |
34,000 |
34,000 |
|
|
| 17:50 |
19,250 |
20,000 |
34,000 |
34,000 |
|
|
| 18:00 |
19,800 |
20,000 |
34,000 |
34,000 |
|
|
NOTE: Axle weights may be reduced during the spring breakup season or on otherwise posted streets.
Examples of Metric Tire Conversion
| Metric Tire Size |
Tire Width in Inches |
Metric Tire Size |
Tire Width in Inches |
| 245/75R22.5 |
9.6 inches |
295/75R22.5 |
11.6 inches |
| 255/70R22.5 |
10.0 inches |
315/75R22.5 |
12.4 inches |
| 265/75R22.5 |
10.4 inches |
385/65R22.5 |
15.2 inches |
| 275/80R22.5 |
10.8 inches |
425/65R22.5 |
16.7 inches |
| 285/75R24.5 |
11.2 inches |
445/65R22.5 |
17.5 inches |