ZINUS 9 Inch Box Spring with Cover Split Queen
- Size: Split Queen
- Material Type: Poly Jacquard, Steel
- Shape: Rectangular
- Item Weight: 48.8 pounds
Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A practical no-assembly foundation for a queen mattress that needs real height, as long as a compatible bed frame or platform is already in place to hold it.
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ASIN: B0077UCFXGCategory: Box Springs
Sizes Available
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Overview
A 9 inch split queen box spring foundation with a poly jacquard cover over a steel frame, sold as a fold flat unit that requires no assembly. It is the foundation only, meant to sit under a mattress on top of a bed frame or platform that is purchased separately.
The selling point is the folding steel structure: it ships flat and unfolds into shape rather than needing tools or hardware, which also makes it easier to carry through hallways and stairwells on moving day. At 9 inches it is built for a high profile look or for shorter mattresses that need extra lift, not a low profile bedroom. Because it is a split queen, it arrives as two pieces rather than one full width unit.
- 9 inch height with poly jacquard cover
- Steel interior frame, no tools to assemble
- Split queen ships as two pieces
- 700 lb combined weight capacity
Who it's for
Suits anyone replacing an old box spring who wants to avoid tools and hardware, especially in apartments with tight stairwells or hallways. Not for platform bed owners, since this is a slatless foundation meant to sit inside a frame that itself provides support.
Pros and cons
- Unfolds with no tools or assembly
- Steel frame rated up to 700 lbs combined
- 9 inch height suits shorter mattresses
- 5 year limited warranty
- Box spring only, needs a separate frame or platform
- Ships as two split queen pieces, not one unit
Performance notes
The interior is steel rather than the wood grid found in older box springs, and Zinus states a 700 lb capacity across the split queen pair (versus 350 lbs for a single twin unit), with the steel frame folding flat for shipping and unfolding on site. The 9 inch height is meant to add lift for mattresses that sit too low or feel too soft without a taller foundation underneath them.
Specifications
| Brand | Zinus |
|---|---|
| Dimensions & fit | |
| Size | Split Queen |
| Item Weight | 48.8 pounds |
| Item Dimensions | 79 × 59.5 × 9 inches |
| Construction & materials | |
| Material Type | Poly Jacquard, Steel |
| Color | Off-White |
| Included components | |
| Unit Count | 1 |
| Included Components | Assembly Instructions, Hardware |
| Warranty & support | |
| Manufacturer Warranty Description | 5 years |
| Other details | |
| Shape | Rectangular |
| Number of Items | 1 |
| Style Name | 9 Inch |
| Item Type Name | Box Spring |
| Set Name | Single Set |
| Product Care Instructions | Spot Clean Only |
Closest rivals on specs
ALDRICH 9 Inch Heavy Duty Metal Box Spring King- Item Weight 48.8 vs 41 pounds (+19%)
Greaton Amish Made 4 Inch Wood Box Spring Queen- Item Weight 48.8 vs 40 pounds (+22%)
EMODA 5 Inch Metal Box Spring with Cover Queen- Item Weight 48.8 vs 33 pounds (+48%)
Frequently asked questions
Does this Zinus box spring need assembly?
No. It folds flat for shipping and only needs to be unfolded, with no tools required.
Can this replace a platform bed?
No, this is a box spring foundation only. It needs a bed frame or platform bed underneath it to support it, sold separately.
How much weight can the split queen size hold?
Zinus rates the split queen and other larger sizes up to 700 lbs combined, versus 350 lbs for a single twin unit.