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  2. John H. Balsley - Wikipedia

    en.wikipedia.org/wiki/John_H._Balsley

    Although stepladders had been in use for many years before 1862, his primary contribution to safety was the replacement of round rungs by flat steps. He became a wealthy businessman because of his inventions. Balsley's home in the Oregon Historic District, built about 1877, still stands at 419 East Sixth Street, a reminder of his success. [1]

  3. Wheelchair ramp - Wikipedia

    en.wikipedia.org/wiki/Wheelchair_ramp

    A concrete wheelchair ramp A portable wheelchair ramp. A wheelchair ramp is an inclined plane installed in addition to or instead of stairs. Ramps permit wheelchair users, as well as people pushing strollers, carts, or other wheeled objects, to more easily access a building, or navigate between areas of different height. Ramps for accessibility ...

  4. Attic ladder - Wikipedia

    en.wikipedia.org/wiki/Attic_ladder

    Attic ladders typically consist of a ladder with wider steps and a steep slope. [1] A drawstring will hang down to allow the ladder to be manually extended. Attic ladders are usually made of wood, metal, aluminum, or fiberglass. Also, fire departments carry attic ladders on fire apparatus for use to

  5. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    Step ladder, a self-supporting portable ladder hinged in the middle to form an inverted V, with stays to keep the two halves at a fixed angle. Step ladders have flat steps and a hinged back. Swim ladder, a ladder used by swimmers to get out of the water, often on boats. Telescoping ladder, commonly used to refer to a hybrid between a step ...

  6. Inclined plane - Wikipedia

    en.wikipedia.org/wiki/Inclined_plane

    An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load. [1] [2] [3] The inclined plane is one of the six classical simple machines defined by Renaissance scientists. Inclined planes are used to move ...

  7. Home Depot - Wikipedia

    en.wikipedia.org/wiki/Home_Depot

    This is an accepted version of this page This is the latest accepted revision, reviewed on 28 January 2025. American multinational home improvement supplies retailing company The Home Depot, Inc. An aerial view of a Home Depot in Onalaska, Wisconsin Company type Public Traded as NYSE: HD DJIA component S&P 100 component S&P 500 component Industry Retail (home improvement) Founded February 6 ...