Drop Deck Extendable Trailers

Extendable Commercial Trailer

Kalyn Siebert drop deck extendables are the choice for versatility in both payload size and distribution. By adjusting the trailer length for each load-specific haul, a KS platform extends not only the deck, but the possibilities of service application.

Drop Deck Extendable 2 Axle Trailers

Image of Drop Deck Extendable 2 Axle Trailers.

SpecificationsSchematicReference MaterialFeatures

Drop Deck Extendable 2 Axle Trailers

KS AbbreviationKDPEX
Legacy NameKDPEX-75
Capacity75,000 lbs distributed (load in open position must be 2 point blocked) GAWR & tire rating determine legal loads
Overall nominal dimensions8’ 6” nominal wide X 48’ nominal closed, 73’ nominal open.
Additional options available, please contact Kalyn Siebert sales for more information.
Swing Clearance84"
King Pin2"
5th Wheel Height49"
Main Deck38'
Upper Deck10'
Rear Height, loaded41"
Landing Gear2-speed landing gear with roadside crank handle.
Beams130,000-psi yield flanges with 80,000 psi yield web, 20” deep main rails, and 8” side channels.
Crossmembers12” centers, 4” junior I beam.
Flex TrackThe track between main beams to enclose and provide protected travel of air and electrical lines during extension of the trailer.
StopsAir operated for extendable length with stops approximately two at 18”, 2 at 24”, balance at 60”. Track carrier for air and electrical lines to allow extension/retraction without disconnecting/reconnecting lines.
Floor1 1/8” Apitong with screws on every cross-member.
Rub Rail, Stake Pockets, & Pipe Spools2 X 5/16” rub rail, 24” centers for stake pockets, and single pipe spools as standard.
Winch TrackOptional
SuspensionRidewell Air Ride, 50” spread
Air ControlsRaise & Lower Kit
AxlesTwo axles, 5” round with 5/8” wall, tapered spindles, 25,000 lb capacity.
Hubs10 stud, hub piloted, long studs, steel hub.
DrumsCast Drum
Brakes16 1/2" X 7" Air, Parking Brakes on Both Axles
ABS2S/1M, On Rear Axle
Slack AdjustersOEM Automatic slack adjusters, 28 Spline
WheelsSteel Disc Wheels, 8.25 X 22.5
TiresOEM, 255/70R22.5, 16PR (Low Profile) Radial Tires
Mud FlapsBlack anti-spray with Kalyn Siebert Logo
Finishing (Paint & trim)Shot blasted prior to paint. Epoxy primer and Black (standard) polyurethane paint. Air, electrical and hydraulic lines installed after painting is completed.
Lights & ElectricalLED-sealed beam with mid turn signal, 12 volt. 7-way plug. Third tail light as strobe with a toggle switch.
Conspicuity TapeDiscontinuous on sides
ManualOne operator manual per order will be provided. Parts manual available as the option.
Weight17,000 lbs +3% tolerance. For trailers other than standard specification, weight and the dimensional drawing will be provided by the plant after the order is received and accepted.
CommentsImages may include non-standard options

Click to view Schematic PDF.

Drop Deck - Feature Sheet

The Kalyn Siebert Drop Deck Platform trailer allows you to lower the platform height in order to haul general freight that is too tall for a regular platform trailer.