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John H. Balsley (May 29, 1823 – March 12, 1895) was a master carpenter and inventor, inventing a practical folding wooden stepladder and receiving the first U.S. patent issued for a safety stepladder in the year. He was born in Connellsville, Fayette County, Pennsylvania to George H. and Sarah (Shallenberger) Balsley. His father was also a ...
A detrainment device may consist of a manually placed, hinged, foldable or telescopic ladder or ramp. A detrainment device may allow evacuation to track level, or to a coupled railcar. A detrainment device may be fitted with handrails.
An extension ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.
Step stools are halfway between a ladder and a stool, being used, as a support platform, for reaching targets that are at heights between ~2m and ~3m. The most common modern type is made with two separate ladders connected to each other at the upper end, where there is a platform with an area big enough to stand with both feet on it, having the ...
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Donald Trump's election win signals changes in tax policies that could shape the financial future for middle-class Americans. While President-elect Trump promised to lower taxes for most Americans ...
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