2505.1 The gross weights imposed upon the highway exerted through the wheels on any one axle of a vehicle shall not exceed twenty-one thousand pounds (21,000 lbs.).

2505.2 Any one axle exceeding eighteen thousand pounds (18,000 lbs.) shall be equipped with four (4) properly inflated conventional-type tires or with two (2) properly inflated wide-base tires designed specifically for application as a replacement for conventional dual tires and rated equivalent in load carrying capacity.

2505.3 For the purposes of this section, an axle load shall be defined as the total load imposed upon the highway through all wheels whose centers are included within two parallel transverse vertical planes not more than forty inches (40 in.) apart.

2505.4 A loading error or tolerance of one thousand pounds (1,000 lbs.) is allowable for axle loads, and the same tolerance shall be applied for axle or gross loads permitted by special or annual permits; Provided, that any citation for overweight violation, when the load is in excess of one thousand pounds (1,000 lbs.) tolerance, shall be the total amount between the legal or permitted load and total load. The one thousand pounds (1,000 lbs) tolerance shall not be included in the amount of weight in the violation.

2505.5 No group of two (2) or more consecutive axles shall carry a weight exceeding the value(s) given in the following table. However, if the gross weight of a vehicle or vehicle combination exceeds seventy-three thousand pounds (73,000 lbs.), the maximum weight imposed upon the highway exerted through the wheels of any one axle shall not exceed twenty thousand pounds (20,000 lbs.) nor shall a tandem axle exceed thirty-four thousand pounds (34,000 lbs.).

THE DISTANCE IN FEET BETWEEN THE EXTREMES OF ANY GROUP OF TWO OR MORE CONSECUTIVE AXLES	MAXIMUM WEIGHT IN POUNDS FOR ANY TWO OR MORE CONSECUTIVE AXLES (WHEELBASES) MORE CONSECUTIVE AXLES
	2 AXLES	3 AXLES	4 AXLES	5 AXLES	6 AXLES
4-7	37000
8	37000	37000
9	38000	41500
10	39000	52500
11	40000	43000
12	41000	44000	49000

13	42000	44500	49500
14	43000	45500	50500
15		46000	51000
16		47000	51500	57000
17		47500	52500	57500
18		48500	53000	58000
19		49000	53500	59000
20		50000	54500	59500	65000
21		50500	55000	60000	65500
22		51500	55500	60500	66000
23		52000	56500	61500	67000
24		53000	57000	62000	67500
25		53500	57500	62500	68000
26		54500	58500	63000	68500
27		55000	59000	64000	69000
28		56000	59500	64500	70000
29		56500	60500	65000	70500
30		57500	61000	65500	71000
31		58000	61500	66500	71500
32		59000	62500	67000	72000
33		59500	63000	67500	73000
34		60500	63500	68000	73500
35		61000	64500	69000	74000
36		62000	65000	69500	74500

37		62500	65500	70000	75000
38		63500	66500	71000	76000
39		64000	67000	71500	76500
40		65000	67500	72000	77000
41			68500	72500	77500
42			69000	73000	78000
43			69500	74000	79000
44			70500	74500	79000
45			71000	75000	79000
46			71500	75500	79000
47			72500	76500	79000
48			73000	77000	79000
49			73500	77500	79000
50			74500	78000	79000
51			75000	79000	79000

2505.6 Whenever authorized signs are erected indicating a truck restriction, no person shall operate the type of truck prohibited on the street, except that the prohibited truck may be operated on the street or portions of the street for the sole purpose of making a delivery or pickup and then only by entering the street at the intersection nearest to the destination of the truck and proceeding on the street no further than the next intersection after the delivery or pickup has been completed.

SOURCE: Commissioners' Order 274,310/949 effective September 1 1949; 17 DCRR §§ 155(a) - (c), (h) (October 19, 1970); as amended by Final Rulemaking at 27 DCR 458 (February 1, 1980), incorporating text of Proposed Rulemaking published at 26 DCR 2470, 2473 (November 30, 1979); by Final Rulemaking published at 27 DCR 5558 (December 19, 1980), incorporating text of Proposed Rulemaking published at 27 DCR 3692, 3693 (August 22, 1980); and by Final Rulemaking published at 34 DCR 4233, 4234 (July 3, 1987).