Vertical rods on Abacus are used to represent the place value of number. If the centre rod of Abacus is place of One's or Unit, the immediate next rod to the left is theplace of Ten's and the immediate nest rod to the left of Ten's is Hundred's and so on and so forth for thousand, 100 Thousand, Million's etc.
A: For standard box springs, twin sizes are usually 38 or 39 inches wide by 75 inches long, and full sizes are 53 or 54 inches wide by 75 inches long. Queen- and king-size box springs are both 80 inches long, but measure 60 inches and 76 inches wide, respectively.
Split boxes are foundations made up of two (2) separate box springs placed side-by-side, and are especially for delivery to places where a normal whole box spring will not fit, such as through tight doorways, staircase or around narrow corners. All King size mattresses use Split box springs. Queen size box springs are available in two (2) types: Whole and Split box springs. Split Queen box springs are two 30 inch X 80 inch boxes that equal the size of one (1) whole Queen. If you think you will require a Split box spring, you should make sure to order your Queen mattress with a Split box spring. This can be found in the size selection under (Split Queen Set) or (Custom Queen).