No.
it can hold about 600-700lbs
No.
Technically yes, in the same sense that you can use a 4" plate for an 8" steak. A twin box spring is considerably smaller (slightly shorter and much narrower) than a queen mattress. The mattress will stick out nearly a foot on each side of the box spring, and a few inches at either the top or bottom (or both).
30" x 80"
The weight of a queen size box spring will vary depending on the materials used. The average weight of a queen size box spring would usually be between 60 and 100 pounds.
No.
It is used when you can not fit a standard queen box spring into the door of a room, or upstairs in an elevator etc.
it can hold about 600-700lbs
60x80
A split queen mattress is not as common as a split king sized mattress. A box spring for a queen bed can be purchased when the area for the bed is unreachable by the queen box spring in its original size.
No.
The average queen size mattress weighs between 90 and 110 pounds. The average queen size box springs for the mattress weighs is between 60 to 105 pounds.
Technically yes, in the same sense that you can use a 4" plate for an 8" steak. A twin box spring is considerably smaller (slightly shorter and much narrower) than a queen mattress. The mattress will stick out nearly a foot on each side of the box spring, and a few inches at either the top or bottom (or both).
A split queen is a term used to describe a type of queen size box spring. A traditional queen is a one piece box spring. A split queen is actually two small box springs that when put together side by side form a queen size box spring. It is essentially a queen size box spring in two pieces, split down the middle (right side and left side), hence the term queen split. One is not any better then the other. The only reason for a split queen is that it is easier to move. Because box springs are stiff, a queen size may be impossible to maneuver around corners, hallways or doorways in smaller living spaces like apartments, so its much easier to move as two separate parts. All king size box springs are sold as splits for the same reason (beacuse they are huge and impossible to get around narrow corners and stairways).
30" x 80"
If I'm not mistaken, I believe it weighs slightly more than a box spring