2023 California Code › Vehicle Code - VEH › DIVISION 15 - SIZE, WEIGHT, AND LOAD › CHAPTER 5 - Weight › ARTICLE 1 - Axle Limits › Section 35551.5.

35551.5. (a) The provisions of this section shall apply only to combinations of vehicles which contain a trailer or semitrailer. Each vehicle in such combination of vehicles, and every such combination of vehicles, shall comply with either Section 35551 or with subdivisions (b), (c), and (d) of this section.
(b) The gross weight imposed upon the highway by the wheels on any one axle of a vehicle shall not exceed 18,000 pounds and the gross weight upon any one wheel, or wheels, supporting one end of an axle and resting upon the roadway, shall not exceed 9,500 pounds, except that the gross weight imposed upon the highway by the wheels on any front steering axle of a motor vehicle shall not exceed 12,500 pounds. The gross weight limit provided for weight bearing upon any one wheel, or wheels, supporting one end of an axle shall not apply to vehicles the loads of which consist of livestock. The following vehicles are exempt from the front axle weight limits specified in this subdivision:
(1) Trucks transporting vehicles.
(2) Trucks transporting livestock.
(3) Dump trucks.
(4) Cranes.
(5) Buses.
(6) Transit mix concrete or cement trucks, and trucks that mix concrete or cement at, or adjacent to, a jobsite.
(7) Motor vehicles that are not commercial vehicles.
(8) Vehicles operated by any public utility furnishing electricity, gas, water, or telephone service.
(9)  Trucks or truck tractors with a front axle at least four feet to the rear of the foremost part of the truck or truck tractor, not including the front bumper.
(10) Trucks transporting garbage, rubbish, or refuse.
(11) Trucks equipped with a fifth wheel when towing a semitrailer.
(12) Tank trucks which have a cargo capacity of at least 1,500 gallons.
(13) Trucks transporting bulk grains or bulk livestock feed.
(c) The total gross weight with load imposed on the highway by any group of two or more consecutive axles of a vehicle in such combination of vehicles or of such combination of vehicles where the distance between the first and last axles of the two or more consecutive axles is 18 feet or less shall not exceed that given for the respective distance in the following table:
Distance in feet
Allowed load in
between first and
pounds on group
last axles of group
of axles
4  ........................
32,000
5  ........................
32,000
6  ........................
32,200
7  ........................
32,900
8  ........................
33,600
9  ........................
34,300
10  ........................
35,000
11  ........................
35,700
12  ........................
36,400
13  ........................
37,100
14 ........................
43,200
15  ........................
44,000
16  ........................
44,800
17  ........................
45,600
18  ........................
46,400
(d) The total gross weight with load imposed on the highway by any vehicle in such combination of vehicles or of such combination of vehicles where the distance between the first and last axles is more than 18 feet shall not exceed that given for the respective distances in the following table:
Distance
Allowed load
in feet
in pounds
19  ........................
47,200
20  ........................
48,000
21  ........................
48,800
22  ........................
49,600
23  ........................
50,400
24  ........................
51,200
25  ........................
55,250
26  ........................
56,100
27  ........................
56,950
28  ........................
57,800
29  ........................
58,650
30 ........................
59,500
31  ........................
60,350
32  ........................
61,200
33  ........................
62,050
34  ........................
62,900
35  ........................
63,750
36  ........................
64,600
37  ........................
65,450
38  ........................
66,300
39  ........................
68,000
40  ........................
70,000
41  ........................
72,000
42  ........................
73,280
43  ........................
73,280
44  ........................
73,280
45 ........................
73,280
46  ........................
73,280
47  ........................
73,280
48  ........................
73,280
49  ........................
73,280
50  ........................
73,280
51  ........................
73,280
52  ........................
73,600
53  ........................
74,400
54  ........................
75,200
55  ........................
76,000
56 or over  ........................
76,800
(e) The distance between axles shall be measured to the nearest whole foot. When a fraction is exactly six inches, the next larger whole foot shall be used.
(f) The gross weight limits expressed by this section shall include all enforcement tolerances.
(g) Nothing in this section shall affect the right to prohibit the use of any highway or any bridge or other structure thereon in the manner and to the extent specified in Article 4 (commencing with Section 35700) and Article 5 (commencing with Section 35750) of Chapter 5 of Division 15.
(h) The Legislature, in enacting this section, does not intend to increase, and this section shall not be construed to allow, statutory weights any greater than existed prior to January 1, 1976.
(Added by Stats. 1980, Ch. 784, Sec. 4.)