Super Duty Foundation Low Profile 5″ Springless Box Spring Quick Assemble (King)



Made In The USA!


Free shipping at STL Beds

  • Heavy Duty 5″ Tall Foundation
  • Lowers Mattress Height By 3-4 Inches
  • All Wood High Profile Construction 
  • Better Support: Designed to support Softside Waterbeds, Latex Mattresses, Memory Foam, Gel, Coil Spring, Airbeds, Hybrid Mattresses, and Plus Size People.
  • 14  Extra Wide Bed Slats: Closely spaced for total mattress support and better breathability.
  • Easy Quick Assembly: Approximate assembly time about 15 Minutes. No tools are needed.
  • Fits Tight Spaces: Replaces Expensive Split Box Spring. Ideal for tight stairways, hallways, or any spaces where a 1-piece box spring does not fit.
  • Fast & Free Shipping
  • Learn More Below:
SKU: KDSDLP5found-K Tags: , , ,


1-Piece Super Heavy Duty Low Profile 5″ Tall Springless Box Spring


One Piece Foundation That Can Split King Box Springs

Walk the Super Duty Low Profile Springless Box Spring (King) easily through your home and assemble it in your bedroom


What It Does

In the case of the STL Beds low profile springless boxspring, it has the same exact construction as the standard height, but it is shorter by 3 1/4 inches. In fact, the stability of the base and its support is exactly the same as well. This lower profile design is a perfect option for anyone at any time who wants to reduce the total height of their bed. The finished height of your mattress set is an important choice to make and can be the difference between easily getting in and out of the bed or not.


Today’s mattresses are extremely thick and when you add in the height of your bed frame, the bed itself, and boxspring/foundation it is easy to see why there is such a great demand for low-profile box springs. By simply decreasing the height of your mattress, with a thinner foundation, the problem of height can be eliminated. Low-profile foundations are approximately 3-4 inches shorter than standard 8-9 inch tall box springs. This is one of the very best ways to get your mattress to sit closer to the ground.


What Kind Of Mattress Can I Use This Box Spring With?

The STL Beds Quick Assemble Low Profile 5″ tall Super heavy-duty foundation can be used underneath virtually any type of mattress including softside waterbeds, memory foam beds, all bed in a box type of mattresses, latex mattresses, coil spring, pocketed coil beds, and hybrid beds. The slats are spaced 2 3/4 apart to provide the necessary support for all of the listed mattresses.


Every mattress should have a sturdy foundation and the very best mattresses require one. A great support system needs to be resistant to dipping and sagging. It is extremely important that your mattress has the necessary required support for long life, warranty compliance, and comfortable sleep.


Will It Fit? Simply carry the box with contents into your room of choice, pull out the pieces, and lay them out according to instructions. Take it in the room you thought you couldn’t get a one-piece boxspring into and assemble it according to the directions.


Compare Super Duty To The Rest

Ours: We do not sacrifice building materials, strength, and durability for profitability. The hand-crafted Super Heavy Duty knocked down, solid wood foundation is built exclusively for STL Beds to the most rigid of standards. You can’t beat the value. The very best construction for the same or less than most brand name boxsprings but with 2-3 times the quality. That is no joke!


We stand behind our quality and encourage you to compare this to any big brand name boxspring or foundation. Why?

Because our super heavy-duty wood foundation starts by doubling the total number of wooden slats to 14 you will receive with your new system. Each slat is at least 2 1/2 inches wide and made from Canadian spruce and fir. No matter what size you choose, each corner will bolt securely together with a large carriage bolt to secure the mainframe together. Then it is reinforced with two wooden dowel rods. All super duty foundation sizes include a solid wood I-Beam running head to toe that includes extra support blocks for added strength. NOTE: California King, Eastern King, Queen, and Full all include two super-strong I-Beams.


Compare this to our competition who typically uses nothing more than a 1 3/8 wide, flimsy piece of wood for center support with no reinforced support anywhere. STL Beds adds additional wood blocks for extra side strength down each side of the foundation for seating. We only use solid wood to provide the optimal support for you and yours and your new or old mattress.



  • The main structural frame of most box springs and foundations built today use only staples to hold them together.
  • Competitors rarely use more than 7 to 8 wood support slats.
  • Their wooden slats are usually only 1 1/2 inches wide. In most cases, we use twice as many slats and our slats are 2.5 inches wide.
  • They do not include middle or side strength reinforcement which is necessary for sturdy and strong seat edge support.
  • Most brand-name foundations are supported by a flimsy wire support grid. In fact, the only advantage of a grid wire system is that they are lightweight. NOTE: This is NOT a plus. The lack of quality materials makes them In susceptible to bending, uneven support, and a weak frame structure.


What Kind Of Mattress Can I Use This Box Spring With?

The STL Beds Quick Assemble High Profile 8.25″ tall heavy-duty foundation can be used underneath virtually any type of mattress including the heaviest applications like memory foam beds, all bed in a box type of mattresses, latex mattresses, coil spring, pocketed coil beds, and hybrid beds. The slats are spaced 2 3/4 apart to provide the necessary support for all the listed mattresses.


The foundation comes with a luxurious encased cover that completes the look of your mattress set. The neutral, white-colored cover allows for it to coordinate with virtually any mattress color and design. The zippered encasement fully encases the foundation for a beautifully tailored look.


Your new knockdown mattress support system comes with all the necessary parts for a trouble-free assembly. The estimated time to remove the packaging and assemble is 15 – 30 minutes. The foundation comes in pieces making it a one-person job. Carry the foundation into the desired room piece by piece or in the box. This is a smart alternative to the traditional two-person carry of a traditional bulky box spring. No tools are needed to turn this dream into a reality. Everything you need comes standard.


This Knock Down (KD) Wood Mattress foundation is shipped directly to your house. This springless box spring can be knocked down and moved at your convenience, making it easier to move than your ridged one-piece box spring or costly split box foundations. It is ideal for tight spaces such as upstairs where your traditional foundation or box spring may have fitment issues.

Additional information

Weight 94 lbs

, , ,

Product Features

Features & Benefits:

  • An Old Interior Design Trick- By lowering bed height, visually tricks the eye into thinking the room looks more spacious.
  • Aesthetics- Perhaps you have a beautiful headboard and do not want its visual appearance being blocked and your personal taste would prefer more of its esthetics more headboard to show and a less thick mattress.
  • Lowers Overall Bed Height- Most of today’s mattresses are built thicker, some can be well over 14” thick. This makes the finished total bed much taller than some people expect leaving them with a much taller bed height. A lower foundation solves this problem.
  • Making And Dressing Your Bed- It is easier to put sheets and pillows on a lower bed.
  • Ease Of Moving- Move it assembled or take it apart for a lightweight moving experience that can be done by one person. Thanks to their sleek design, this thinner profile goes where 1-piece boxsprings normally will not fit. Ideal for those who move a lot. When assembled this 5” thick design can make turns and slip through tight spaces that 9” thick models will not.
  • Weight- Weighs less than taller foundations for ease of carrying in a move.
  • Made With Pride In The USA!
  • What Can This Hold? It’s the hardest working foundation in the business. Supports softside waterbeds, bariatric people, plus sizes, latex mattresses, memory foam, heavy people. We can support it.
  • Solid Wood- All solid wood super sturdy structure. We do not use any composite woods OSB oriental strand board, particle board, or flimsy sheet metal slats.
  • Super Duty Foundation Height– 8.25” It is so popular it is our bestselling height. People like how it looks and how it makes entering and exiting the bed easier.
  • Individual Mobility– Lifts mattress to a more sensible bed height. How high will my bed sit when complete? Simply add the height of your frame, mattress, and foundation together. This is the point where you need to determine if this finished height will work for: Kids so they can easily climb into bed with you? Aging pets that can’t jump that high. Can the elderly get in and out without problems or is falling out of bed a concern?
  • Take It Anywhere Easily– Move it assembled or take it apart for lightweight moving that can be done by one person with ease. When unassembled this foundation can fit through very tight spaces and even through low overhangs where 1-piece boxsprings normally will not fit. Foundation can be assembled in the bedroom.
  • Solid Level Mattress Support– Even weight distribution for better consistent support. Improves overall mattress life. Helps prevent that annoying middle mattress ridge associated with split two-piece foundations.
  • Wider Slats & More Of Them– Fortified with 14 solid wood 2 1/2-inch-wide slats that are properly spaced for perfect support. The slat count includes head and foot end pieces which are block reinforced. Breathable Design- The engineered design allows this mattress to breathe properly. The natural spruce construction and soft zippered cover mean you get perfect airflow no mattress what kind of mattress you choose.
  • Zippered Cover- Easy to install. Easy to remove it and disassemble foundation for easy moving. Replace it if you stain it. Do not wash spot, clean only.
  • Closely Spaced Slats– the distance between each wood slat 2 3/4
  • Bolted Together– bolted together in each corner with carriage bolts. Also includes wooden dowel rods for additional strength.
  • Less Movement– no bouncy coil springs for unmatched motion isolation so sleeping partner is not disturbed during the night.
  • 2 Solid I-Beam Construction– Includes two super heavy-duty head to toe center support I-Beams with extra support blocks. Most competitors don’t include one I-Beam. Twin and Twin Extra Long uses One I-Beam Down The Middle.
  • Stronger Seat Edge Support– extra wood block supports down each side for reinforcement for sitting when entering, exiting the bed. Includes All Necessary
  • Hardware– Included
  • Fits All Types Of Bed Frames– Hollywood, steel, platform, beds with headboards, beds with headboards and footboards.
  • Weight capacity– can support up to 3000 pounds when weight is distributed properly. So strong it can support a soft-sided waterbed.
  • Nightstand access– helps put your nightstand within reach for better access and ease of use.
  • Zippered fabric cover- this cover installs easily. Simply pull over the foundation and zip it closed. No tools are needed or required for assembly
    Available in all sizes
  • Quiet- Whisper quiet so you sleep better and are not disturbed.
  • Perfect For Active Couples.
  • Great Substitute For Split Queen Boxspring.


Heavy Duty Quick Assemble Dimensions, And Weight

Finished Size:


  • King Size– Length 80” Width:76” Height: 5” Weight 83 lbs. King Ships in one box. When assembled King is a one-piece foundation.

This best alternative to a 2 Piece Box Spring Or Split King Box Spring. Simply Carry the box of parts into your bedroom and assemble it in there. No annoying seam running down the middle of your mattress.


  • Cardboard Shipping Box Measures Approximately 12 x 13 x 77 (This is NOT the completed size when assembled.
  • Measurement is for the pieces packaged / shipping dimensions).
  • This is a great substitute for a Split King Box Spring. One Large Flat Supporting Surface For Your Mattress. Simply Carry the unassembled box into your bedroom and put it together.

Cardboard Shipping Box Measures Approximately 12 x 13 x 77 (This is NOT the completed size when assembled. Measurement is for the pieces packaged / shipping dimensions)


There are no reviews yet.

Be the first to review “Super Duty Foundation Low Profile 5″ Springless Box Spring Quick Assemble (King)”

Your email address will not be published. Required fields are marked *