noun
going (of stairs); length (of a step)
Architectural term for the horizontal depth of a stair tread, i.e., the distance from the front to the back of a step. Also used more generally for the length of something laid horizontally.
階段の伏せ長は、通常25センチ程度が歩きやすいとされる。
A stair tread depth of about 25 centimeters is generally considered easy to walk on.
この図面では、伏せ長が明記されていない。
The tread depth is not specified in this blueprint.
Standard spelling for this architectural term.
Alternate spelling; 伏せ長 is more common.
Compound of 伏せ (ふせ, 'lying face down' or 'covering') and 長 (なが, 'length'), referring to the horizontal length of a laid surface. The exact historical derivation is uncertain.