How heavy are these things?

[toxic111]

Originally Posted by RDNanoGuy

Residential building floor are required to support 200 lbs per square foot in Canada.

Ummm.. no they are not, Commercial floors don't even meet that standard.

Residential floors are 40psf live (anything you put on the floor), and 15-20 dead (weight of the floor itself). Though in most cases a newer home with exceed that standard, depending on the type of joists that are used.

That said, you should be fine, but like others said, need to keep it off carpet, using 3/4" plywood will spread the load over the carpet.

Oh I design buildings for a living, so I have a pretty good idea what I am talking about.