1.  About a third to a half the usable space in any private house is taken up by special rooms devoted to sleeping.

2.  The stairway was supported by four oak posts, allowing usable open space.

3.  Floating may free the bed, but it costs in terms of usable space.

4.  He is recalled, too, in the design of the rooftop as usable space.

5.  I also liked all the usable space.

6.  Likely now a similar courthouse would have four floors of usable space in eight stories, an obeisance to bureaucrats and regulators.

7.  One must bear in mind, however, that in the Netherlands any usable space is a luxury.

8.  The bowl sitting atop the table is amusing and offers more usable space than when it is inset.

9.  The difference between the usable space and the rentable space is called a loss factor, and is generally expressed as a percentage.

10.  The Galaxy says it has the largest percentage of usable public space of any ship in the world.