How to combine 2 twin beds

Written by marie mulrooney
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Hoteliers regularly combine two twin beds to form one king-size mattress, using a device sometimes called a trundle safety strap. You can do the same thing--with or without using the same equipment they do--in just a few minutes at home. You have two ways of avoiding the depression or crack that results from squeezing two mattresses together: Either bind them together with a trundle safety strap as the hoteliers do, or replace the twin mattress with a king-size mattress supported by the twin bed frames.

Skill level:
Moderately Easy


    The Quick Way

  1. 1

    Remove the twin mattresses from the box springs and frames. Set the mattresses aside or dispose of them.

  2. 2

    Slide the twin bed frames and box springs together until their long sides touch and line up evenly. Lock the wheels on the frame--usually accomplished by moving a small tab over the wheels--if that's an option on your particular frames.

  3. 3

    Place a king-size mattress on top of the two twin frames. Two standard twin frames will be about 2 inches wider than a king mattress and about 5 inches shorter, so it's a pretty good fit. If your twin bed frames have headboards or footboards you'll need to remove one or both, allowing the king mattress room to protrude a couple of inches past the head of the frame, the foot of the frame or to divide the difference between them both.

    The Hotelier Method

  1. 1

    Leave the twin mattresses in place on the box springs and frames. Push the two beds together so that their long edges touch and the head and foot of the mattress line up evenly.

  2. 2

    Place the foam, padded portion of a trundle safety strap over the crack between the two mattresses. Check to make sure that it overlaps the head and the foot of the mattresses by the same amount.

  3. 3

    Bring the side clips on one side of the trundle strap together and clasp them by inserting the tapered portion in the hollow part. The strap should extend from the middle foam padding around the side edges of one mattress.

  4. 4

    Clasp the other side of the trundle strap together as well; it should extend around the edges of the other mattress.

  5. 5

    Tighten the straps around both mattresses by pulling the webbing strip on first one buckle, then the other buckle. Continue until they're both equally tight and the beds are firmly bound together. This should only take a few tugs.

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