Stair railings of length 0.52 m, to the nearest centimeter, are cut from poles of wood which each measure 3.60 m to the nearest centimeter. The range of possible lengths of the stair railings is 0.515 m < r < 0.525 m. Give the range of possible lengths of the poles in the form a < p < b.
Answers
Answer:
Easy Steps For Measuring
Step 1 – Measure the overall height. The overall height is the distance from the floor or landing at the top of the set of stairs to the floor/landing at the bottom of the set of stairs.
Step 2 – Measure the overall length. When determining the overall length, measure the horizontal distance form the edge of the nosing on the first tread at the bottom of the staircase to the edge of the nosing on the floor/landing at the top of the staircase.
Step 3 – Length of nosing. To obtain the length of the nosing, measure the top edge of the nosing of the first tread to the top edge of the floor/landing nose. Do not confuse this measurement with the overall length.
Step 4 – Depth of finished tread. To obtain this measurement, measure the length of one finished tread (from front to back).
Step 5 – Height of finished tread. To obtain this measurement, measure the height of a riser from the base tread to the tread of the next stair above it.
It is also important to note we will need the number of risers and the number of treads to determine a complete handrail system for your application. When counting the number of risers, include the riser from the bottom floor or landing to the first tread. Then count to the last tread to the floor or landing at the top of the set of stairs. When determining the number of treads, do not count the floors or landings, only the number of finished treads. Typically, you will have one more riser than you will have treads.
Information for Submitting a Quote
When submitting an RQF to Wagner, be sure to supply all the above measurements. Additionally, we will need to know your tread material (wood, concrete, metal, stone, etc.), desired post type, and the finished spacing between your posts. Please also indicate if the set of stairs features any winders and if the stringers will be opened or closed.
Bear in mind if your installation is to meet building codes, there will be structural and dimensional requirements that must be met. Handrail height must be between 34 and 38 inches. Structurally, it must be able to withstand a concentrated load of 200 lbs. or a uniform load of 50 lbs./ft. Graspability requirements will limit handrail dimensions. You can learn more about building code definitions for handrail here.
While there are a handful of measurements required to determine the proper handrail system for your stairs, it doesn’t have to be a complicated process. The most important thing to remember is each set of stairs is unique and requires its own set of measurements. With the proper measurements, you can rest assured you will be installing a properly fitting, code compliant handrail, providing safety and beauty to all who use it. For more information contact us.