King Bed No Box Spring: Three King Platforms

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Quick answer

Two of the three list 80 by 76 by 14 inches, the 14 inch grid frame and the Sweetcrispy (700 pounds, “12 inches off the ground”), and the OSASET lists 80 by 75 by 42 inches with a headboard, 12 inches of under-bed space and a 3,000 pound claim. The ratings vary from 700 to 3,000 pounds for similar steel, so we treat them as page claims.

Quick compare: the products in this guide

Sizes come from the Amazon listings as we read them; check the product page for the current details before you buy.

Product	Listed details	Link
14″ Heavy Duty Metal Platform King Bed Frame with Grid Structure	80 x 76 x 14 in; metal	See details on Amazon Affiliate link
Sweetcrispy King Bed Frame, Metal Steel Slat Platform, No Box Spring	80 x 76 x 14 in; 700 lb	See details on Amazon Affiliate link
OSASET 14 inch King Bed Frame – Platform Bed Frame with Headboard Metal Bed…	80 x 75 x 42 in; 3,000 lb	See details on Amazon Affiliate link

The three at a glance

	14 in Heavy Duty King (grid)	Sweetcrispy King	OSASET 14 inch King with headboard
Dimensions (L x W x H)	80 x 76 x 14 in	80 x 76 x 14 in	80 x 75 x 42 in
Weight claim	Not read	700 lb	3,000 lb
Under-bed space	Not read	12 in off the ground	12 in
Support	Dense grid	Steel slats	9 legs, steel slats
Headboard	Pre-drilled holes	Not included	Included (rustic style)
Assembly	Not read	Tools included	About 30 minutes, no tools needed

14″ Heavy Duty Metal Platform King Bed Frame with Grid Structure

The page describes a dense grid that prevents sagging, mattress baffles at the head and foot, pre-drilled holes for any standard headboard and a reinforced structure with no box spring. It lists 80 by 76 by 14 inches. A grid can suit a thin latex mattress, per the page.

Sweetcrispy King Bed Frame, Metal Steel Slat Platform

The table gives 80 by 76 by 14 inches, steel, 700 pounds and the model HJ23611king. The bullets say the platform sits 12 inches off the ground for storage. Compared with the other two pages it states the lowest rating.

OSASET 14 inch King Bed Frame with Headboard

This frame adds a headboard (the 42 inch height) and says the 14 inch platform has 12 inches of under-bed space, 9 reinforced legs and steel slats supporting up to 3,000 pounds, assembled in about 30 minutes. It has plastic foot plugs and non-slip strips for the slats.

Worked example: fit, height and what the ratings mean

This is our own arithmetic. A king mattress is 76 by 80 inches by the Amerisleep chart we opened.

Frame	Length vs mattress	Width vs mattress	Bed top with 10 in mattress
Grid 14 in	0	0	24 in
Sweetcrispy	0	0	24 in
OSASET	0	-1 in	24 in

For ratings, a king mattress of 150 pounds and two sleepers of 180 pounds each (assumed) total 510 pounds. The Sweetcrispy’s 700 pounds covers that with a 190 pound margin; a 3,000 pound claim is a larger margin, but all three would carry the example, so the number matters mostly for heavier users or extra loads. Our bed frame for overweight person guide covers that.

What “no box spring” needs

A platform frame replaces the box spring only if the slats or grid suit your mattress. Nest Bedding’s warranty asks for slats no more than 4 inches apart and center support to the floor on queen and larger, so a king must have a center leg. The OSASET page lists nine legs; the other two pages did not tell us in the parts we read. See bed slats, bed frame middle support and king platform bedframe.

A worked scenario: a king bed in a rental

This is our own scenario. A renter moves every year and wants a king frame that comes apart. The grid frame and the Sweetcrispy are both 14 inch steel frames that ship flat; the OSASET adds a headboard that stands 42 inches high, which is a longer box. Steel frames tend to use bolts and a few parts, and the OSASET page says about 30 minutes to assemble and that no further tools are needed. For a renter, how many times the frame can be assembled and taken apart matters, and the pages do not say. Count the bolts and keep them in a labeled bag.

A worked scenario: the cost of a wrong size

A king mattress that does not fit costs a return. The three frames list 80 by 75 to 76 inches. A king mattress is 76 by 80 inches, which is a match for the grid and the Sweetcrispy. The OSASET at 75 inches wide is 1 inch narrower than the mattress; a mattress of 76 inches on a 75 inch deck overhangs by half an inch a side, usually fine. If you have a mattress that is a little oversize, which happens, the overhang grows, and a frame with raised end boards may not hold it. Measure your mattress before you order, and measure twice.

Questions to ask the seller before you order

1. How many legs does the king frame have, and is there a center leg?
2. What is the gap between slats or the size of the grid?
3. Does the frame come with mattress stoppers at the head and foot?
4. How tall is the headboard on the OSASET, and is it removable?
5. What is the warranty period?

After it arrives

Lay out the parts and count them against the list. Build the frame in the room where it will live, since a king frame is long. Fit the slats before the mattress. If the frame squeaks, check the bolts first and then the slat ends; our non squeaky bed frame guide has the usual causes. If you plan to add a headboard later, ask where the reserved holes are.

When a different frame would suit better

If you want a king bed with storage drawers, see king bed frame with drawers underneath. If you want a lower look, see low profile platform bed king. If you want a frame that works with an adjustable base, see king bed frames compatible with adjustable base. A steel platform is the practical choice when you want to avoid a box spring, move often and keep the cost of the frame down, and it is the least comfortable to sit on the edge of, since steel rails are hard.

Reading the three listings critically

The weight claims range from 700 to 3,000 pounds for similar steel frames, which tells you the figures are not tested to one standard or are calculated in different ways. The OSASET page’s 42 inch height is the headboard, not the bed, and the Sweetcrispy page’s “12 inches off the ground” is the clearance, not the frame height. When you compare, line up the same quantity: frame height, under-bed clearance and total height with a headboard are three different numbers.

A final check on the numbers

Write down the length, width, height and clearance from each page, and then your mattress’s size. A king is 76 by 80 inches, so a frame at 80 by 75 or 76 is a normal match. Compare the total height, which includes the headboard on the OSASET, with the room’s ceiling and window. Then compare the claimed weight, and choose the frame whose page tells you most: leg count, slat gap and assembly time in writing.

Mistakes to avoid

Assuming all king platforms have a center leg. Check the leg count.

Reading 42 inches as the bed height. It includes the OSASET headboard.

Treating the rating as a test. It is a page claim.

Forgetting the headboard. Two of the three do not include one.

Frequently asked questions

Do I need a box spring with a king platform frame?

No, if the frame’s slats or grid meet your mattress maker’s rule.

How high are these frames?

14 inches, with 12 inches of space under, per the pages.

Which is the strongest?

The OSASET claims 3,000 pounds, the Sweetcrispy 700.

Do they have a center support?

The OSASET lists nine legs. The others do not say in the parts we read.

Will a king mattress fit?

They list 80 by 75 to 76 inches, about the size of a king.

Do you recommend one?

We have not tested them. This guide reports what the pages say.

Products worth checking

We have not tested these products. Sizes and features come from the Amazon listings as we read them; where a listing does not say, we say so.

Sources checked

• Amerisleep: mattress sizes and dimensions chart
• Nest Bedding: warranty

Specifications come from the Amazon listings as we read them for this guide. Product details and availability can change, so confirm on the product page before you buy.

How we research our guides