Beds & bases · Updated May 2026

    How to Choose a Bed Frame

    A bed frame is a structural product judged on three things: whether it supports the mattress evenly, whether it stays silent, and whether it holds up under load for a decade. Everything else is styling.

    It also has direct consequences for your mattress warranty. Most foam and hybrid warranties specify slat spacing and center support, and a sag caused by an inadequate frame is the single most common reason a warranty claim is refused.

    What Actually Matters

    Slat spacing

    Foam and hybrid mattresses need slats no more than about 3 inches apart. Wider gaps let the mattress bulge between slats, which shows up as premature softening in exactly the places you sleep.

    Too-wide slats? A bunkie board or plywood sheet fixes it cheaply

    Center support with legs to the floor

    Every queen and king frame needs a center rail with at least one — ideally two or three — legs reaching the floor. A rail that merely spans side to side without legs is not center support.

    King frames should have 5–6 total floor contact points

    Weight capacity

    Rated capacity has to cover both sleepers plus the mattress, which on a king can be 150 lb by itself. Steel frames typically publish a real figure; many decorative wood frames do not.

    Add mattress weight to combined body weight, then add margin

    Noise and joint design

    Squeak comes from metal-on-metal joints and wood-on-wood contact under load. Bolted joints with washers, felt or rubber pads at contact points, and a rigid center rail are what keep a frame quiet after year two.

    Re-tighten every bolt after the first month — most squeaks start there

    Frame types and who they suit

    Choose the type first; it constrains height, storage and cost more than any other decision.

    • Metal platform — cheapest reliable option, strong, often noisy unless joints are padded. Good for guest rooms and budget builds.
    • Wood platform — quieter and warmer-looking; verify slat spacing, since decorative frames often ship with wide gaps.
    • Upholstered — headboard comfort for readers, but fabric traps dust and is harder to clean.
    • Storage frame — drawers or a lift-up base; excellent in small bedrooms, heavier to assemble and to move.
    • Adjustable base — a motorised alternative that replaces the frame entirely; see our adjustable base coverage.

    Get the height right

    Comfortable bed height puts the top of the mattress roughly at your knee, so your feet reach the floor with hips and knees near level when you sit on the edge. Total height is frame deck height plus mattress thickness, and a 14-inch mattress on a 16-inch frame produces a bed most people have to climb into.

    For older adults and anyone with hip or knee problems, this is the most important spec on the page — a bed that is too low makes standing up hard, and one that is too high makes sitting down a controlled fall.

    Do you still need a box spring?

    Not with a platform frame — that is the point of one. A traditional box spring is only required if the frame has just a perimeter rail and no slat deck, or if a specific innerspring warranty calls for it. Stacking a box spring on a slatted platform simply raises the bed and adds nothing.

    Frequently Asked Questions

    How far apart should bed slats be?

    About 3 inches or less for foam, latex and hybrid mattresses. Wider gaps allow the mattress to sag between slats, and most manufacturers name a maximum spacing in the warranty terms.

    Does a queen or king bed frame need center support?

    Yes. Any frame that size needs a center rail with legs to the floor, and kings generally need two or three legs. Missing center support is a leading cause of mid-bed sag and denied warranty claims.

    Why does my bed frame squeak?

    Almost always loose bolts or unpadded contact points. Re-tighten every fastener, add washers where metal meets metal, and place felt or rubber pads between slats and rails. If the squeak persists, the center support is likely flexing.

    How high should a bed frame be?

    Aim for the mattress top to land near knee height when you stand beside it, so you can sit with feet flat and knees near a right angle. Remember to add mattress thickness to the frame's deck height when comparing options.

    Can I put a mattress directly on a platform frame?

    Yes, as long as the slat deck meets the spacing requirement and has center support. That is exactly what platform frames are designed for, and no box spring is needed.

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