Wyoming Administrative Code
Agency 045 - Transportation, Dept. of
Sub-Agency 0004 - Motor Carrier
Chapter 5 - SIZE AND WEIGHT LIMITATIONS OF VEHICLES
Section 5-3 - Statutory Size and Weight Limits (Exclusive of Permits)

Universal Citation: WY Code of Rules 5-3

Current through September 21, 2024

(a) Statutory size limits include vehicles, loads, load-holding devices, and bumpers; but do not include approved safety devices.

(b) Permits are required for vehicles and loads exceeding statutory limits.

(i) Width: 8 1/2 feet (102 inches)

(ii) Height: 14 feet

(iii) Length:

(A) 60 feet for single units or semi-trailers in a truck-tractor and semi- trailer combination.

(B) 81 feet for a semi-trailer, trailer, or double semi-trailer combined length in a truck-tractor and semi-trailer, trailer, or double semi-trailer combination including the connecting mechanism. (Pole trailers shall be allowed to operate under this provision when used with a truck-tractor.)

48 feet maximum for a semi-trailer.

40 feet maximum for a trailer or second semi-trailer (not including the connecting mechanism).

(C) For consecutive towed vehicles, if the weight difference between the vehicles exceeds 5,000 pounds, the heavier towed vehicle shall be directly behind the truck-tractor, and the lighter towed vehicle shall be last.

(D) 85 feet for any combination of vehicles other than those listed in the preceding subparagraphs (A) and (B).

(E) Except as provided in (F) immediately following, no combination shall consist of more than 3 single vehicles.

(F) 97 feet for saddlemount combinations consisting of no more than 3 saddlemounts. Additional vehicles may be transported when safely loaded on the frame on a vehicle in a properly assembled saddlemount combination.

(iv) Weight:

(A) 20,000 pounds for a single axle.

(B) 36,000 pounds for a tandem axle.

(D) For 3 or more axles used on bridges measuring more than 8 1/2 feet, refer to Gross Weight Table 1.

When applicable, all other axle groups are governed by the number of axles and axle measurements in accordance with Gross Weight Table 1.

(E) 10,000 pounds each wheel.

(F) 8,000 pounds each wheel with solid tires. The wheels of all vehicles except those operated at a speed of less than 10 miles per hour shall be equipped with pneumatic tires.

(G) For each tire:

(I) Steering tires - 750 pounds per inch of width as stamped by manufacturer.

(II) Other tires - 600 pounds per inch of width as stamped by manufacturer.

(H) Gross Weight:

(I) Up to 117,000 pounds on the interstate in accordance with the formula limitations found in Gross Weight Table 1.

(II) Up to 117,000 pounds on the primary and secondary highways in accordance with the formula limitations found in Gross Weight Table 1.

(III) Up to 80,000 pounds on primary and secondary highways in accordance with the formula limitations found in Gross Weight Table 2.

(I) The following weight tables establish the maximum legal gross weight for vehicles. Gross Weight Table 1 requires checking all consecutive groups of axles to determine legal limits and is referred to as the "inner bridge" system.

(J) Subject to the limitation imposed by the axle load, no vehicle or combination of vehicles shall be operated on interstate or national defense highways exceeding the maximum weight allowed under federal law, unless in compliance with Table 1 corresponding to a distance in feet between the extremes of any axle groups measured longitudinally, to the nearest foot, except that vehicles with 2 consecutive sets of tandem axles may carry a gross load of 36,000 pounds each if the distance between the first and last axles of the consecutive sets of tandem axles is 36 feet or more.

(K) Vehicles operating on primary and secondary highways may operate in accordance with Table 1 or Table 2 at the discretion of the operator, as follows:

(I) For vehicles operating under Gross Weight Table 1, the total gross weight in pounds imposed on the highway by any group of 2 or more consecutive axles on a vehicle, or combination of vehicles, shall not exceed the value given in Gross Weight Table 1, corresponding to a distance in feet between the extremes of any axle groups measured longitudinally, to the nearest foot. An exception allows that 2 consecutive sets of tandem axles may carry a gross load of 36,000 pounds each if the distance between the first and last axles of the consecutive sets of tandem axles is 36 feet or more;

(II) For vehicles operating under the provisions of Gross Weight Table 2, the total gross weight in pounds imposed on the highway by a vehicle, or combination of vehicles, shall not exceed the value given in Gross Weight Table 2, corresponding to the distance in feet between the extremes of the vehicle, or combination of vehicles, measured longitudinally to the nearest foot;

(III) Vehicles with 2 consecutive sets of tandem axles with a distance of less than 22 feet between the first and last axles of the consecutive sets shall comply with Gross Weight Table 1.

Gross Weight Table 1

	Distance in feet between the extremes of any group of 2 or more consecutive axles					Maximum gross weight 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 or more axles
4	36,000
5	36,000
6	36,000
7	36,000
8	36,000	42,000
9	39,000	42,500
10	40,000	43,500
11		44,000
12		45,000	50,000
13		45,500	50,500
14		46,500	51,500
15		47,000	52,000
16		48,000	52,500	58,000
17		48,500	53,500	58,500
18		49,500	54,000	59,000
19		50,000	54,500	60,000
20		51,000	55,500	60,500	66,000
21		51,500	56,000	61,000	66,500
22		52,500	56,500	61,500	67,000
23		53,000	57,500	62,500	68,000
24		54,000	58,000	63,000	68,500	74,000
25		54,500	58,500	63,500	69,000	74,500
26		55,500	59,500	64,000	69,500	75,000
27		56,000	60,000	65,000	70,000	76,000
28		57,000	60,500	65,500	71,000	76,500	82,000
29		57,500	61,500	66,000	71,500	77,000	82,500
30		58,500	62,000	66,500	72,000	77,500	83,000
31		59,000	62,500	67,500	72,500	78,000	83,500
32		60,000	63,500	68,000	73,000	78,500	84,500	90,000
33			64,000	68,500	74,000	79,000	85,000	90,500
34			64,500	69,000	74,500	80,000	85,500	91,000
35			65,500	70,000	75,000	80,500	86,000	91,500

36	Two consecutive	66,000	70,500	75,500	81,000	86,500	92,000
37	sets of tandem	66,500	71,000	76,000	81,500	87,000	93,000
38	axles may carry	67,500	72,000	77,000	82,000	87,500	93,500
39	36,000 pounds	68,000	72,500	77,500	82,500	88,500	94,000
40	each if the	68,500	73,000	78,000	83,500	89,000	94,500
41	distance is 36	69,500	73,500	78,500	84,000	89,500	95,000
42	feet or m ore	70,000	74,000	79,000	84,500	90,000	95,500
43	between the	70,500	75,000	80,000	85,000	90,500	96,000
44	consecutive sets	71,500	75,500	80,500	85,500	91,000	96,500
45	of tandem axles	72,000	76,000	81,000	86,000	91,500	97,500
46		72,500	76,500	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	79,000	84,000	89,000	94,500	100,000
51		76,000	80,000	84,500	89,500	95,000	100,500
52		76,500	80,500	85,000	90,500	95,500	101,000
53		77,500	81,000	86,000	91,000	96,500	102,000
54		78,000	81,500	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		80,000	83,500	88,000	93,000	98,500	104,000
58			84,000	89,000	94,000	99,000	104,500
59			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	106,000
62			87,000	91,000	96,000	101,500	107,000
63			87,500	92,000	97,000	102,000	107,500
64			88,000	92,500	97,500	102,500	108,000
65			88,500	93,000	98,000	103,000	108,500
66			89,000	93,500	98,500	104,000	109,000

67	90,000	94,000	99,000	104,500	110,000
68	90,500	95,000	99,500	105,000	110,500
69	91,000	95,500	100,000	105,500	111,000
70	92,000	96,000	101,000	106,000	111,500
71	92,500	96,500	101,500	106,500	112,000
72	93,000	97,000	102,000	107,000	112,500
73	93,500	98,000	102,500	107,500	113,000
74	94,500	98,500	103,000	108,500	113,500
75	95,000	99,000	104,000	109,000	114,000
76	95,500	99,500	104,500	109,500	115,000
77	96,000	100,000	105,000	110,000	115,500
78	97,000	101,000	105,500	110,500	116,000
79	97,500	101,500	106,000	111,000	116,500
80	98,000	102,000	106,500	111,500	117,000
81	98,500	102,500	107,000	112,000
82	99,000	103,000	108,000	113,000
83	100,000	104,000	108,500	113,500
84		104,500	109,000	114,000
85		105,000	109,500	114,500
86		105,500	110,000	115,000
87		106,000	111,000	115,500
88		107,000	111,500	116,000
89		107,500	112,000	117,000
90		108,000	112,500
91		108,500	113,000
92		109,000	113,500
93		110,000	114,000
94		110,500	115,000
95 or more		111,000	115,500

Gross Weight Table 2

Primary and Secondary Highways

Distance in feet between the extremes of the first and last axle of any vehicle or combinations of vehicles	Maximum gross weight in pounds
10	43,500
11	45,000
12	48,000
13	50,000
14	52,000
15	54,000
16	54,000
17	54,000
18	56,000
19	58,000
20	62,000
21	64,000
22	65,000
23	66,000
24	66,000
25	66,000
26	66,000
27	66,000
28	66,000
29	66,000
30	67,000
31	68,000
32	69,000
33	70,000
34	71,000
35	72,000
36	73,000
37	74,000
38	75,000
39	76,000
40	76,000
41	76,000
42	76,000
43	76,000
44	76,000
45	77,000
46	77,400
47	78,300
48 or more	80,000

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Wyoming Administrative CodeAgency 045 - Transportation, Dept. ofSub-Agency 0004 - Motor CarrierChapter 5 - SIZE AND WEIGHT LIMITATIONS OF VEHICLESSection 5-3 - Statutory Size and Weight Limits (Exclusive of Permits)

Wyoming Administrative Code
Agency 045 - Transportation, Dept. of
Sub-Agency 0004 - Motor Carrier
Chapter 5 - SIZE AND WEIGHT LIMITATIONS OF VEHICLES
Section 5-3 - Statutory Size and Weight Limits (Exclusive of Permits)