Federal & State Regulations | Size/Weight limits - Pennsylvania

Dimension	National Network	State and Other Supplemental Highways
Width:	8' 6"	8' 6" 12' Implement of Husbandry (conditional)
Height:	13' 6"	13' 6"
Length:	National Network	State and Other Supplemental Highways
Bus	45'	45'
Articulated bus	63'	63'
Straight Trucks	40' See length special limitations for boom trucks	40' See length special limitations for boom trucks
Straight truck and trailer
Tractor-semitrailer combinations	No limit	No limit
Semitrailer	53' see KPRA	53' see KPRA
Tractor-twin-trailer combination	No limit	Not allowed
Trailers of twin-trailer combinations	28' 6"	Not allowed
Boat-transporter combination	65' plus 3' front and 4' rear overhang	65' plus 3' front and 4' rear overhang
Overhang limitations
Stinger-steered boat-transporter
Overhang limitations
Auto-transporter	65'	65'
Overhang limitations	3' front, 4' rear	3' front, 4' rear
Stinger-steered auto-transporter	80'	80'
Overhang limitations	4' front, 6' rear	4' front, 6' rear
Saddlemount	NS	75'
General overhang limitations	3' front, 6' rear	3' front, 6' rear
Drawbar
Dromedary
Kingpin to rearaxle	41' to the center line of the rear axle or rear axle group	41' to the center line of the rear axle or rear axle group
Length special limitations or restrictions	Pennsylvania allows a combination transporting articles that, themselves, do not exceed 70' in length and are nondivisible as to length. A vehicle equipped with a boom or boom-like device allowed up to 55' An automobile transporter is not prohibited from the transport of cargo or general freight on a backhaul if the automobile transporter complies with the weight limitations for a truck tractor and semitrailer combination motor vehicle.
Weight:	Interstate and Defense Highways	State and Other Supplemental Highways
Steer axle	20,000	20,000
Single axle	20,000 22,400 lb if GVW is 73,280 lb or less	20,000 22,400 lb if GVW is 73,280 lb or less
Tandem axle	34,000 36,000 lb if GVW is 73,280 lb or less	34,000 36,000 lb if GVW is 73,280 lb or less
Tridem axle
Gross vehicle weight	80,000 following bridge formula	80,000 following bridge formula
Load per inch width of tire	800	800
Per wheel
Tolerances
APU allowance	400	400
Natural gas allowance	2,000 Includes battery powered	2,000 Includes battery powered
Weight special limitations or restrictions

Bridge rules

Maximum gross vehicle weights
Number of Axles	Motor Vehicle (Pounds)
2-axle	38,000
3-axle	58,400
4-axle	73,280
5-axle	73,280
6-axle	77,000
7-axle	80,000

(Vehicles may not exceed manufacturer’s weight rating)
Combination Type	Combination (Pounds)
Two-axle truck tractor & single-axle semitrailer	58,400
Two-axle truck tractor & two-axle semitrailer	73,280
Three-axle truck tractor & single-axle semitrailer	73,280
Two-axle truck & two-axle trailer	73,280

Gross weight table
Center-to-center distance in feet between the first and last axles of any group of 2 or more consecutive axles	Maximum load in pounds carried in any group of 2 or more consecutive axles
4	34,000
5	35,000
6	36,000
7	37,000
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
29		58,000	61,500	66,000	71,500	77,000
30		58,500	62,000	67,000	72,000	77,500
31		59,500	62,500	67,500	72,500	78,000
32		60,000	63,500	68,000	73,000	78,500
33			64,000	68,500	74,000	79,500
34			64,500	69,500	74,500	80,000
35			65,500	70,000	75,000	80,000
36			68,000	70,500	75,500	80,000
37			68,000	71,000	76,000	80,000
38			68,000	72,000	77,000	80,000
39			68,000	72,500	77,500	80,000
40			68,500	73,000	78,000	80,000
41			69,500	73,500	78,500	80,000
42			70,000	74,500	79,000	80,000
43			70,500	75,000	80,000	80,000
44			71,500	75,500	80,000	80,000
45			72,000	76,000	80,000	80,000
46				77,000	80,000	80,000
47				77,500	80,000	80,000
48				78,000	80,000	80,000
49				78,500	80,000	80,000
50				79,500	80,000	80,000
51 and over				80,000	80,000	80,000

Gross weight table
Center-to-center distance in feet between the first and last axles of any group of 2 or more consecutive axles	Maximum load in pounds carried in any group of 2 or more consecutive axles
4	34,000
5	35,000
6	36,000
7	37,000
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
29		58,000	61,500	66,000	71,500	77,000
30		58,500	62,000	67,000	72,000	77,500
31		59,500	62,500	67,500	72,500	78,000
32		60,000	63,500	68,000	73,000	78,500
33			64,000	68,500	74,000	79,500
34			64,500	69,500	74,500	80,000
35			65,500	70,000	75,000	80,000
36			68,000	70,500	75,500	80,000
37			68,000	71,000	76,000	80,000
38			68,000	72,000	77,000	80,000
39			68,000	72,500	77,500	80,000
40			68,500	73,000	78,000	80,000
41			69,500	73,500	78,500	80,000
42			70,000	74,500	79,000	80,000
43			70,500	75,000	80,000	80,000
44			71,500	75,500	80,000	80,000
45			72,000	76,000	80,000	80,000
46				77,000	80,000	80,000
47				77,500	80,000	80,000
48				78,000	80,000	80,000
49				78,500	80,000	80,000
50				79,500	80,000	80,000
51 and over				80,000	80,000	80,000

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Center-to-center distance in feet between the first and last axles of any group of 2 or more consecutive axles	Maximum load in pounds carried in any group of 2 or more consecutive axles
	2 axles	3 axles	4 axles	5 axles	6 axles	7 axles
4	34,000
5	35,000
6	36,000
7	37,000
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
29		58,000	61,500	66,000	71,500	77,000
30		58,500	62,000	67,000	72,000	77,500
31		59,500	62,500	67,500	72,500	78,000
32		60,000	63,500	68,000	73,000	78,500
33			64,000	68,500	74,000	79,500
34			64,500	69,500	74,500	80,000
35			65,500	70,000	75,000	80,000
36			68,000	70,500	75,500	80,000
37			68,000	71,000	76,000	80,000
38			68,000	72,000	77,000	80,000
39			68,000	72,500	77,500	80,000
40			68,500	73,000	78,000	80,000
41			69,500	73,500	78,500	80,000
42			70,000	74,500	79,000	80,000
43			70,500	75,000	80,000	80,000
44			71,500	75,500	80,000	80,000
45			72,000	76,000	80,000	80,000
46				77,000	80,000	80,000
47				77,500	80,000	80,000
48				78,000	80,000	80,000
49				78,500	80,000	80,000
50				79,500	80,000	80,000
51 and over				80,000	80,000	80,000

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Size/Weight limits - Pennsylvania

Bridge rules