20′ Gooseneck – 13,000 lbs Deck-Over Trailer Plans

Description

Builders and haulers who want the advantages of a gooseneck in a mid weight trailer, can get plans here.  This 13,000 lb gooseneck deck-over trailer fills the practical middle ground – in both deck length and capacity.

This trailer benefits from the stability and load sharing of a gooseneck, yet it is light enough to be efficient for everyday use.  Perfect if you are more interested in function than chasing the highest rating.

13,000 lb Gooseneck Deck-Over Trailer – Design Overview

A full flat deck keeps usable space clear of the tires for easy loading of equipment, materials, or pallets.  Coupled with the gooseneck, it allows more freedom for loading and weight distribution.

As you can see in the images, this is a tandem axle, gooseneck deck-over trailer.  Axle capacity is 12,000 lbs. from two 6000 lb. axles.  With a gooseneck tongue weight of 20% to 25%, the total trailer capacity is 13,000 lbs.  See full specifications in the tab below.

In all Mechanical Elements designs, we give attention to stress throughout the frame, so this trailer is tough by design.  The engineering includes the gooseneck gussets which reduce stress, and at the same time, are both lighter and stronger.  The analysis considers how the trailer reacts in braking and cornering, as it carries your things to your places.  Here is an article about the engineering in this gooseneck deck-over trailer.

Finally, with all our plans we give choices in the trailer build.  Choose your deck style, various sides (or not), ramps, rub rails, jack styles, tie-down locations, and much more.  Even the options have options – like choices for ramp length and strength.  We do the frame design and engineering, then you can build it with options for the way you want it.

Related Products & Information

– For a bumper-pull of the same deck size:  8.5′ x 20′ – 10,400 lbs Deck-Over Trailer Plans.
– For a bumper-pull with a little higher capacity:  8.5′ x 20′ – 14,000 lbs Deck-Over Trailer Plans.

Specifications

8.5′ x 20′ – 13,000 lbs Gooseneck Deck-Over Trailer Plans

• 8’6″ x 20′ nominal deck size.
• 12,000 lbs tandem axle capacity (two 6,000 lb axles).
• 13,000 lbs trailer capacity (with 20%+ tongue load).
• Leaf springs design with load equalizer.
• Deck-over design includes options for deck style, ramps, rub rails and stake pockets.
• Gooseneck design includes options for an upper mini-deck, high spare carrier, winch, and more.
• Welded Steel Construction with C-Channel main beams.
• Engineered gussets to maximize strength, while minimizing weight.  Read this article about gooseneck engineering.
• Approximate base trailer weight ~ 2800 lbs (w/o Ramps, Decking, or extras).
• With typical options including a full wood deck, the gooseneck upper mini deck, rub rails, ramps, etc., weight should be less than 4000 lbs. (3880 lbs according to CAD calculations – but your choices for options affect weight.)
• While the main design is a traditional Deck-Over trailer, plans also include many options.
  (Something you will not get with other trailer plans.)
• Instructions explain the build, step by step, with hints to customize for specific needs.
• The download is a Zip file with drawings, illustrated instructions, and special part files.
• This design includes several engineered parts to cut from sheet.  The download includes the data to get the parts made.
• Design is Fully Engineered and ready for action.

More About The Design Features

While the specifications are nice, here is little more information about the trailer features.

• * The trailer is 8 feet 6 inches wide (typical legal width limit).  8’6″ width includes the rub rails.
• * The trailer deck bed length is 20 feet, 3.6 inches including the steel frame.
• Overall length with the tongue is 29 feet, 2.6 inches – which can vary a little with some choices.
• Trailer deck height will depend on choices.  Typical is ~35 inches, but will vary with tire size, spring shape, shims, load and other options.
• 12,000 lbs axle capacity (combined axle rating)* using tandem axles rated at 6000 lbs each.
• Total trailer capacity is 13,000 lbs which includes the trailer weight with all options and the full max load.  This include 20% to 25% tongue weight (2600 lbs to 3200 lbs tongue weight).
• The suspension shown is leaf springs, double eye style, with equalizer; Slipper type springs are also acceptable.  This trailer is not designed for  independent torsion axles (see this article).
• Trailer weight will vary depending on the options you choose.  Weights for the trailer in the specifications tab (above) are estimates only.  The materials you choose along with the options you choose, will set the weight for your trailer.
• Many options are in the plans.  Here is a list, yet it does not include everything.
• Deck options – materials, connection options, with or without the wheel covers, etc..  The gooseneck mini deck is also an option.
• Build the standard flatbed, or choose one of the sides options – permanent or removable – shown in the plans.  Sides options have variations, including options for tie-downs, rub rails, stake pockets, etc..
• Ramps are an option – Choose ramps that slide in (and store) under the deck (or not), then choose the ramp length and capacity you need.  Engineering data for strength based length is included.
• Choose a mounted toolbox, an upper mini-deck, spare tire (and location), etc..  These are for optional functionality.  Since some options are mutually exclusive, not all options are in the pictures on this page.

  

• The download package includes the full set of drawings along with illustrated instructions and CAD files for laser or water jet cutting of the tail plate, the gooseneck gussets, and other option parts.
• We provide the plans complete, the way we would want to receive them.  We think they are much more complete and more detailed than any of our competitors.