Not so strong.
Originally uploaded by nofrills.
"Do not sit on this box because it's not so strong. Thank you. - Station Master."
So, people keep using this as a bench.
The phrase, 腰掛けとしての強度はありません, is somewhat funny for a warning like this. It's too polite, or even scientific. I would write 座るとへこみます or 座ったらつぶれます.
