YOU SAID:
"Under the weight that is moving up and down by a wall."
INTO JAPANESE
エレベーターが昇り降りしている。
BACK INTO ENGLISH
The elevator is moving up and down.
INTO JAPANESE
エレベーターが昇り降りしている。
BACK INTO ENGLISH
The elevator is moving up and down.
That didn't even make that much sense in English.