COMPUTED GROSS WEIGHT TABLE
For various spacings of axle groupings
Distance in feet between first and last axles of vehicle or combination of vehicles | Maximum load in pounds on all the axles | |||
2 axles | 3 axles | 4 axles | 5 axles | 6 axles |
8 or less | 36,000 | 42,000 | 42,000 | |
9 | 38,000 | 42,500 | 42,500 | |
10 | 40,000 | 43,500 | 43,500 | |
11 | 44,000 | 44,000 | ||
12 | 45,000 | 50,000 | 50,000 | |
13 | 45,500 | 50,500 | 50,500 | |
14 | 46,500 | 51,500 | 51,500 | |
15 | 47,000 | 52,000 | 52,000 | |
16 | 48,000 | 52,500 | 58,000 | 58,000 |
17 | 48,500 | 53,500 | 58,500 | 58,500 |
18 | 49,500 | 54,000 | 59,000 | 59,000 |
19 | 50,000 | 54,500 | 60,000 | 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 |
25 | 54,500 | 58,500 | 63,500 | 69,000 |
26 | 56,000 | 59,500 | 64,000 | 69,500 |
27 | 57,000 | 60,000 | 65,000 | 70,000 |
28 | 59,000 | 60,500 | 65,500 | 71,000 |
29 | 60,000 | 61,500 | 66,000 | 71,500 |
30 | 62,000 | 66,500 | 72,000 | |
31 | 63,500 | 67,000 | 72,500 | |
32 | 64,500 | 68,000 | 73,500 | |
33 | 65,000 | 69,000 | 74,000 | |
34 | 65,500 | 70,000 | 74,500 | |
35 | 66,500 | 71,000 | 75,000 | |
36 | 67,000 | 72,000 | 76,000 | |
37 | 68,000 | 73,000 | 77,000 | |
38 | 69,000 | 74,000 | 78,000 | |
39 | 70,000 | 75,000 | 79,000 | |
40 | 71,000 | 76,000 | 80,000 | |
41 | 72,000 | 77,000 | 81,000 | |
42 | 73,000 | 78,000 | 82,000 | |
43 | 74,000 | 79,000 | 83,000 | |
44 and over | 75,000 | 80,000 | 84,000 |
Except as provided by special permits, no vehicle or combination of vehicles exceeding the gross weights specified above shall be permitted to travel on the public highways within the State of Alabama.
No vehicle or combination of vehicles shall be permitted to operate on any portion of the Interstate Highway System of Alabama that shall have a greater weight than 20,000 pounds carried on any one axle, including all enforcement tolerances, or with a tandem axle weight in excess of 34,000 pounds, including ll enforcement tolerances, or with an overall gross weight on a group of two or more consecutive axles produced by application of the following formula:
W=500 (LN + 12N + 36)
(N-1)
where W = overall gross weight on any group of two or more consecutive axles to the nearest 500 pounds, L = distance in feet between the extreme of any group of two or more consecutive axles, and N = number of axles in group under consideration; except, that two consecutive sets of tandem axles may carry a gross load of 34,000 pounds each, provided the overall distance between the first and last axles of the consecutive sets of tandem axles is 36 feet or more; provided, that the overall gross weight may not exceed 80,000 pounds, including all enforcement tolerances. Nothing in this section shall be construed as permitting size or weight limits on the National System of Interstate and Defense Highways in this state in excess of those permitted under 23 U.S.C. § 127. If the federal government prescribes or adopts vehicle size or weight limits greater than or less than those now prescribed by 23 U.S.C. § 127 for the National System of Interstate and Defense Highways, the increased or decreased limits shall become effective on the National System of Interstate and Defense Highways in this state. Nothing in this section shall be construed to deny the operation of any vehicle or combination of vehicles that could be lawfully operated upon the highways and roads of this state on January 4, 1975.
Ala. Code § 32-9-20 (1975)