Height: 13’6″. Weight: 80,000 Gross. Single – 20,000. Tandem – 34,000. Tridem – 42,000. ROUTINE PERMIT LIMITS: Length: 150′ (maximum overhang 20′) Overhang: 20′ rear overhang is the maximum permitted. Width: 16′ (over 16′ cannot use Interstate) Height: 16′. Weight: 5 axles – 102,000. 6 axles – 124,000. 7 axles – 146,000. 8 axles – 168,000.