Published at Friday, 14 September 2018. Stair. By Florentine Brugmann.
ThyssenKrupp’s Stair-Glide has advanced features, the most significant of which is the hand pendant control; fold up arms and the foot obstruction sensors. In addition to these features, the stair lift also has over speed brake and a joystick control on the arm, which makes the control easier even for people who are not able to use their hands properly. Stairs are composed of stringers, stair treads and stair risers. The stringers are the slanted members on the sides of the stairs which sit on the floor and are tightly attached at the top of the staircase. In most stair construction, there are two stringers installed on each set of steps. The stair treads are the sections in which you step on to travel up and down the stairs. Stair treads are usually made of wood.
Starting with two parallel 2x6 stringer members, the adjustable brackets are first positioned using a spacing tool and then attached to each member with a single "pivot screw". For finished interior stairs, the stringers may be "paint" grade or "stain" grade but will have a tongue and grove or spline milled into the parallel mating surfaces so that once the brackets are adjusted, the mating surfaces will be pushed together to form a continuous, decorative, one piece knee wall stringer. The remaining screws are inserted and the end cuts are made. All the risers and treads are now square cut to the exact length using a chop saw. It is recommended that a stop is used for accuracy and efficiency. The treads are usually cut slightly shorter than the risers (1/64") for fit. For fast assembly it’s best to first pre- assemble the stair and then lift into position whenever circumstances permit.
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.
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