Wooden Floorboards

Hi all,

I have wooden floorboards with a crawlspace underneath and wooden stumps. The house was built around the 1960s.
Will a safe, measuring about 65x60cm, and weighing 170-180kg be alright on these wooden floorboards? Since it will be in one position over an extended period (many many years to come), will the floorboards be weakened over the years and eventually give way and collapse?

If this happens, what will be the cost to repair the floorboards and stumps?

Also, can anyone give me some advice to securely bolt down the safe? Should I use a metal plate underneath the floorboards? Or are large.diameter washers sufficient?

I hope I posted this in the right forum, I just need some expert advice from some builders.

Thanks.

I'm not a builder but here's what I think. The effort put into securing it to the floor is proportionate to the value of the contents
You'll need to try to get it over a stump or as near to one as possible. They'd probably never collapse but would affect the floor level and may bow under. You'll need to bolt it into joists or using ubolts around them. Extra members wold be advised.