Published at Friday, 14 September 2018. Stair. By Elise Luthi.
The stair is now laid on its back and (starting from the bottom step) the treads are laid in position, fitting perfectly without gaps. As each tread is positioned it is attached to the rear riser. Once all treads are positioned, the stair is laid on its side again and the end screws through the brackets are inserted. The fasteners attaching the tread to the top of the rise may be inserted as blind screws (using pocket holes in the risers) or blocks from the underside or simply using finished nails from the top.
Curved stairs are not as safe as a strait set of stairs. Curved stairs get very narrow on one side. A curved set of steps may be difficult to negotiate in an emergency or fire situation. Handrails should be installed on at least one side of the stairs that has two or more risers. Properly configured stair handrails should 34 inches high and they should be designed to comfortably accommodate a person wrapping their hand around the rail. Guardrails also should accompany a handrail system on a properly configured set of steps. The gaps should be only 4 inches wide so that the body of a child can not fit though the openings.
Stair lifts are devices that are attached to the treads of staircases to safely move someone who is elderly or disabled up or down the stairs. They consist of a track, usually made of aluminum, a chair attached to the track, and the electronic controls that make the chair move up or down the track. Stair lifts are powered by alternating current (AC), which is hooked up to the household electrical system, or with direct current (DC), which uses a battery that recharges from the household electrical system, and does not require use of home electricity to work properly.
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