Granite Counters ... Too heavy for floor???

[Kels]

So I was/am planning on installing 3cm granite slab counters in our kitchen. We have gotten quotes then started to wonder about the weight causing issues.

We have a manufactured home that is only a few years old.

2x6 Floor joists that are 16 O.C.
and roughly 65 sq feet of counter space and back splash.
We are on a full slab but it is pier blocked up.

I don't really trust that the counter guys know if this is going to be an issue for my floor.

I cant get to my floor joists to see if they say anything on them with out ripping into the insulation and underbelly of the house and want to avoid that.

anyone know?

 

[RivennHewn]

If it's only a few years old, contact the manufacturer and ask about load calcs for your model.

3cm shouldn't be a problem, but for your peace of mind, they should be able to answer your questions.

 

[Boomer343]

Kels if I were you I'd be far more concerned about the actual cabinets than the floor especially if any are free standing.

You are spreading the weight out over a large area sort of like putting a concrete slab over foam insulation and the foam holds up due to the weight distribution.

We have a 13 foot island with granite and it is free standing. It runs with the joists so the load is really concentrated on only two joists and it is fine.

 

[Falcon67]

30mm granite runs about 18 lbs sq/ft according to the web.

 

[JMartel]

You should be plenty fine, unless you are putting them overtop of a lead countertop.

 

[C96]

If it’s only a few years old, the granite was probably an option / upgrade when the home was ordered new without additional lower cabinet and flooring support.

 

[OccupantRJ]

I would also worry about the cabinets more than the floor system. I saw a manufactured home demolished with a full size excavator. The guy ripped off the end of the house, then crawled the unit up onto the floor structure, tearing out house as he went until he got to the other end. There are two junior ibeams under each half, and those along with the joists will hold a lot of weight. I was rather impressed.

 

[OccupantRJ]

I added 1 x 2 crossbars and verticals in my cabinets before installation of tops. The installer, who is also a good friend, thought this was a very good idea, especially on a 10 foot pennusula. You could feel a difference in rigidity afterwards. The top took five men to bring in and place.

 

[cdestuck]

If you're worried about this weight, ya better not allow a group of people to stand near each other in your kitchen during a party. Go for it. No problem.

 

[Kels]

If you're worried about this weight, ya better not allow a group of people to stand near each other in your kitchen during a party. Go for it. No problem.

This is funny!

Thanks for all the replies! I found out it was an option so should be no issue at all. Assuming they got the cabinets in there all level!