Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to install wood stairs [title] Establish the perimeters of the space. [step] Measuring the area where the stairs will be constructed is the best way to determine the kind of wood staircase you need. If there is plenty of space, you can choose a traditional split level with a landing, or a straight set of stairs.

Ending1: [substeps] If wood stairs are already at room temperature, there is a good chance they will work well in colder conditions. [title] Decide if the wood staircase will be upright or side-to-side. Ending2: [substeps] Have someone sit on each step, while you work on figuring out which direction the staircase will pass. [title] Mark the stairs floor and the cab to each stair. Ending3: [substeps] For a small, or more crowded area, you may need to install a spiral staircase. For the purpose of this article, we will choose the simplest, a diagonal up and down wood staircase. Ending4: A split level beam probably isn't necessary for both, as you can make the jump more from the center point of the stairs than from the bridge or topside. [substeps] Many bowling alleys feature collapsible posts that can catch the vertical beam when it is thrown over or to the side.

Answer format: ending1/ending2/ending3/ending4