PA CDL Doubles/Triples case studies

PA CDL Doubles/Triples · Put your knowledge to work in context.

The Pennsylvania CDL Doubles/Triples (T) endorsement allows a driver to operate a combination vehicle with two or three trailers - most often a tractor pulling a semitrailer plus one or more full trailers connected through a converter dolly. It is used in line-haul freight, package and parcel networks, and bulk hauling where a single trailer would be inefficient. The PA CDL Doubles/Triples case studies are 5 cases and about 3,670 words.

Building a Set on a Wet 3 Percent Grade with One Pair of Chocks

You are at a grocery distribution center outside Harrisburg building a set for a 240-mile run to Pittsburgh. Your tractor and 48-foot lead trailer are already coupled and the landing gear is up.

745 words, about 4 min 2

Right Turn from a 12-Foot Lane with 104 Feet of Triple Behind You

You are pulling a triple out of a rail yard in Allentown: a 20-foot tractor and three 28-foot pups with two converter dollies, about 104 feet bumper to bumper. At 06:40 you need to turn right from a four-lane road onto a two-lane street.

735 words, about 4 min 3

Nose-High Trailer, Three-Quarter-Inch Gap, Safety Latch Open

You are at a shipper's lot in York at 23:00, coupling to a 53-foot trailer loaded to 42,000 pounds. The trailer was dropped with its landing gear on a wood pad, and your fifth wheel was raised for the previous trailer, which had a taller kingpin plate.

722 words, about 4 min 4

Drives 300 Pounds Over at the Carlisle Scale - What You Can Actually Adjust

At the weigh station on I-81 near Carlisle, your eight-axle triple set scales: steer 11,000; drive tandem 34,300; lead pup 10,400; first dolly 2,000; middle pup 10,200; second dolly 1,900; rear pup 10,100. Gross is 79,900 pounds.

700 words, about 4 min 5

Tail Swing on a Wet 6 Percent Grade with Two Miles Still to Go

You are 12 miles into a descent of a 6 percent grade on a two-lane mountain route in central Pennsylvania, running a triple at 79,000 pounds. The pavement is wet and covered with wet leaves in the shaded sections.

768 words, about 4 min