joist

• n. 根太
• vt.根太を立てる；根太をはめる
• n. （ドイツ語で）人の名前；（ドイツ語で）ヨースト

古フランス語のgiste（橋の支え梁、根太）から。ラテン語のiacere（投げる、投げる、ひいては横たわる、休む）に由来し、語源的にはgist、jet、gistと同じ。

joist

joist: [14] Etymologically, a joist is a wooden beam on which boards ‘lie’ down. The word’s ultimate ancestor is the Latin verb jacēre ‘lie down’ (from which English also gets adjacent). Its neuter past participle jacitum was taken into Old French as a noun, giste, which denoted a ‘beam supporting a bridge’ (its modern French descendant, g?te ‘home’ – that is, ‘place where one lies down’ – is currently infiltrating English). Middle English took over the Old French word, which from the 15th century gradually began to change to joist.
=> adjacent

joist (n.)

early 14c. (late 13c. in Anglo-Latin), from Old French giste "beam supporting a bridge" (Modern French g?te), noun use of fem. past participle of gesir "to lie," from Latin iacere "to lie, rest," related to iacere "to throw" (see jet (v.)). Notion is of wooden beam on which boards "lie down."

1. The transverse diaphragm is very similar in appearance to the conventional bar joist .

梁は通常の鉄筋棚によく似ている。

2.A triangular metal bracket used to strengthen a joist .

梁を補強するための金属板.