8.5′ x 20′ – 14/16,000 lbs Deck-Over Trailer Plans

8.5′ x 20′ – 14/16,000 lbs Deck-Over Trailer Plans

When heft is on the agenda, consider this beefy version of our 20’ length deck-over trailer plans.  With many options like all our trailers, this tandem axle is super heavy duty for rigorous jobs.

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Description

Description

This is a heavy duty trailer.  At 16K by 20′ deck length and an option for 14,000 lbs or 16,000 lbs, this deck-over trailer is a workhorse.  The plans are fully engineered and ready for you to build.  Like all our other Deck-Over trailers, these blueprints have several options and extra features you won’t find with our competitors.  The frame is engineered with structural steel, then you choose the rest.  Choose options like various sides, ramps, hitch style, deck style, and much more.  Also, the options have options — like choices for ramp length and strength.  Build it the way you want it.  This trailer is tough by design, with the engineering to back it up.

Tandem Axle, 14K or 16K and 20′ Flat Deck

When you need a really beefy deck-over trailer, there’s not much else to substitute.  The trailer deck is 8′ 6″ wide by 20′ long with tandem axles to give either 14K or 16K lbs capacity.  Yet, it’s not just beef, there’s a lot of finesse beyond base trailer.  The plans include options, and options in the options.  For instance, our research shows many owners wish their ramps were just a little longer or a little stronger.  So, these plans give options for ramp length and strength with a chart showing capacity by length so you can find your sweet spot.

Giving choices let’s you build it the way you want it — which is the Mechanical Elements way.  We engineer the design for robust action, then you build it and enjoy it.  In researching other deck-over trailers we also found that many side rub rails had damage.  Yes, the rub rails did their job, but many with damage.  The more robust trailers have thicker rails, so this design includes a nice balance of thick and wide — and you can choose.  The same is true throughout the trailer.  Since it’s from Mechanical Elements, these are things to expect.

7000lb Deck-Over Trailer Plans Options
Some of the options.  Plank deck, 8.5′ Ramps, Perimeter Rub Rails and Stake Pockets, Front Stop Rail, Tongue Tray Storage (hard to see), Pivoting Tongue Jack, Adjustable Hitch, and 15″ wheels.  Lots of options exist.

Related Products & Information

– For one size smaller deck:  8.5′ x 16′ – 7000 lbs Deck-Over Trailer Plans.
– Same size, one step less in capacity:  8.5′ x 20′ – 10,400 lbs Deck-Over Trailer Plans.
– For a Lower Deck,  16K (but not a Deck-Over design), please see the  6’10″x 16′ Trailer Plans.
– Learn how we design the blueprints of this 16K by 20′ as well as all our Deck-Over trailers.
16K by 20' Back Options

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Specifications

Specifications

8.5′ x 20′ – 14/16,000 lbs Deck-Over Trailer Plans

  • 16K max at 8’6″ x 20′ nominal deck size.
  • Option for 14,000 lbs axle capacity or 16,000 lbs capacity (including the trailer and the payload).
  • Tandem axles with slipper style leaf springs.
  • Of course, it’s a Deck-over design, having a full 20′ flat deck.
  • Welded Steel Construction has rectangular tube main beams for max torsional stability, then channel, angle and flat in other areas.
  • Approximate base trailer weight ~ 3000 lbs (w/o Ramps, Decking, or Sides).  Options and variations will increase weight.
  • While the main design is a traditional Deck-Over trailer, plans also include many options.
    (Something you just don’t get with other trailer plans.)
  • Instructions explain the build, step by step, with hints to customize for any specific needs.
  • The download is a Zip file with full drawings, instructions, extra illustrations, and special part files.  Just save them to your computer.
  • Fully Engineered design by Synthesis Engineering Services.

Side Access Ramps

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More About The Design Features

More About The Design Features

Here is a little more information to expound on the trailer feature specifications. This is the 16K by 20′ length deck.

  • * The trailer is 8′ 6″ wide (typical legal limit), with a 20′ 3.5″ bed length (including the frame).  8′ 6″ width includes the rub rails.
  • Overall length with the tongue is 302″ (a little over 25 feet) — will vary with some options.
  • Trailer bed height depends on options.  Typical is ~35″ to 36″, but varies with tire size, spring shape, shims, load, etc..
  • Option for 14K or 16K (16,000 lbs) max capacity (combined axle rating)* using tandem axles — rated at 7000 lbs or 8000 lbs each.  Load capacity includes the trailer weight with all options, and the load.
  • Of course, the suspension is heavy leaf springs, slipper style, with equalizer.  Not made for independent torsion axles (see this article).
  • Trailer weight depends on options.  The base trailer plus decking choice, sides, ramps, accessories, etc..
  • Plans have many options.  Here is a partial list.
  • Deck options — material, connection options, with or without the wheel covers, etc..
  • Build the standard flatbed, or choose sides — permanent or removable.  And, sides options have options like 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 ramp length and capacity.  The engineering is there to help you choose.
  • Design has options for a raised front rail (or not), and a tongue tray for special tools (or not).
  • Choose a mounted toolbox, spare tire, etc. for functionality.  Since some options are mutually exclusive, not all are in the pictures here.

    Deck-Over Trailer Options
    Some of the many options in the 16K Trailer Plans (20′ Trailer shown, others similar).
  • Blueprints include the full set of drawings, illustrated instructions, plus CAD files for laser or water jet cutting the tail plate and special parts.
  • We give plans the way we would want to receive them.  Complete, with details and lots of info.  Some you’ll use, some not, but we give you choices.

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Maximizing Your Project

Plans from Mechanical Elements are an awesome start to a great project.  Here are some resources to help even more!

Maximizing Your Project

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