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2. Chinese siege weapons - Wikipedia

   en.wikipedia.org/wiki/Chinese_siege_weapons

   A hinged folding ladder known as the "cloud ladder" was quite prominent. ... A wooden screen. Assault cover. Head cart. ... (9.8 ft) long arrows.

3. Step stool - Wikipedia

   en.wikipedia.org/wiki/Step_stool

   Step stools are halfway between a ladder and a stool, being used, as a support platform, for reaching targets that are at heights between approximately 2 and 3 metres (6.6 and 9.8 ft). 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 ...

4. Attic ladder - Wikipedia

   en.wikipedia.org/wiki/Attic_ladder

   Attic ladders are usually made of wood, metal, aluminum, or fiberglass. ... Folding ladders are usually found in lengths between 8 and 16 feet (2.4 and 4.9 m), while ...

5. John H. Balsley - Wikipedia

   en.wikipedia.org/wiki/John_H._Balsley

   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 ...

6. Ladder - Wikipedia

   en.wikipedia.org/wiki/Ladder

   Ladder stabilizers are also available to increase the ladder's grip on the ground. One of the first ladder stabilizers or ladder feet was offered in 1936 and today they are standard equipment on most large ladders. [8] A ladder standoff, or stay, is a device fitted to the top of a ladder to hold it away from the wall.

7. Caving equipment - Wikipedia

   en.wikipedia.org/wiki/Caving_equipment

   Ladders are usually made in 5, 8 or 10 m (16, 26 or 33 ft) lengths, and can be clipped together to make longer lengths. While ladders can be used without a belay, this is unsafe and is not recommended. Ladders may be carried coiled, without other protection, until needed, or may be carried inside tough PVC tackle-bags.