Fastening plywood or osb

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ultramegabob

ultramegabob

Senior Member
Location
Indiana
How uneven are we talking? If its really bad, you could use lead anchors and long bolts or allthread and make yourself some spacers out of pieces of 1/2" PVC or EMT. Dont forget to use fender washers on top of the lead anchors to keep them seated as you tighten the bolts or nuts.
 
Brian Johns

Brian Johns

Member
Location
Kansas
We have a lot of sandstone foundations around here, I like to use the dowel rod method of drilling a 3/4 hole about 4" deep, cut a piece of 3/4 dowel rod to 4" , then i coat it with construction adhesive meant for cement or stone and insert the dowel, i pilot drill the centers for the first 1" before inserting them, if it needs a spacer, usually use a piece of 1/2' pvc, by laying a 4' level across the dowels i can measure how much spacer i need, then i secure to the dowels with 1/4" x 4" lag bolts or longer if need be.

Not exactly the fastest method but things always seem to be very secure.
 
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ultramegabob

ultramegabob

Senior Member
Location
Indiana
another idea would be to drill holes in the stone, fill with either epoxy or liquid nails (as Brian Johns said, they have some specifically for stone) and insert lenghts of all thread then you can easily adjust the spaceing off the wall with nuts and washers by spinning the nuts up or down the allthread.
 
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iwire

iwire

Moderator
Staff member
Location
Massachusetts
Brian Johns said:
I like to use the dowel rod method of drilling a 3/4 hole about 4" deep, cut a piece of 3/4 dowel rod to 4" , then i coat it with construction adhesive meant for cement or stone and insert the dowel, i pilot drill the centers for the first 1" before inserting them,
Click to expand...

You should take a look at 110.13(A).

A lot will depend on your definition of 'driven'.
 
mdshunk

mdshunk

Senior Member
Location
Right here.
If this is indoors, in a basement, I don't even try to fasten to rubble and stone foundations. I just "hang" a couple 2x4's from the joists above and put the plywood on that. If I'm doing big equipment, those hung 2x4's will be extended nearly to the floor, a pressure treated bottom plate attached, and it will be anchored to the floor. Completely takes the stone wall out of the equation.
 
peter d

peter d

Senior Member
Location
New England
mdshunk said:
If this is indoors, in a basement, I don't even try to fasten to rubble and stone foundations. I just "hang" a couple 2x4's from the joists above and put the plywood on that. If I'm doing big equipment, those hung 2x4's will be extended nearly to the floor, a pressure treated bottom plate attached, and it will be anchored to the floor. Completely takes the stone wall out of the equation.
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Ya. ..........
 
electricmanscott

electricmanscott

Senior Member
Location
Boston, MA
mdshunk said:
If this is indoors, in a basement, I don't even try to fasten to rubble and stone foundations. I just "hang" a couple 2x4's from the joists above and put the plywood on that. If I'm doing big equipment, those hung 2x4's will be extended nearly to the floor, a pressure treated bottom plate attached, and it will be anchored to the floor. Completely takes the stone wall out of the equation.
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Me too :cool:
 
Brian Johns

Brian Johns

Member
Location
Kansas
I'm not mounting the electrical equipment to the rock, sandstone, concrete, plaster, etc....I'm mountng the plywood backplate. The electrical equipment is then mounted to the plywood with wood screws.

I have also hung the 2 x 4's as mdshunk suggests.
 
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iwire

iwire

Moderator
Staff member
Location
Massachusetts
Brian Johns said:
I'm not mounting the electrical equipment to the rock, sandstone, concrete, plaster, etc....I'm mountng the plywood backplate. The electrical equipment is then mounted to the plywood with wood screws.
Click to expand...

Wow, what a spin, you should be a politician.
 
iwire

iwire

Moderator
Staff member
Location
Massachusetts
mdshunk said:
If this is indoors, in a basement, I don't even try to fasten to rubble and stone foundations. I just "hang" a couple 2x4's from the joists above and put the plywood on that. If I'm doing big equipment, those hung 2x4's will be extended nearly to the floor, a pressure treated bottom plate attached, and it will be anchored to the floor. Completely takes the stone wall out of the equation.
Click to expand...

That describes what I had to do in my own basement, works much better then messing with the stone. :cool:
 
Brian Johns

Brian Johns

Member
Location
Kansas
iwire said:
That describes what I had to do in my own basement, works much better then messing with the stone. :cool:
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I totally agree, well kinda, maybe just move the whole mess up and outside.

The times when i have had to go with the dowel has not been often, considering that that is how the old timers used to do it, (not saying that that is the best and only way) what i did worked for me, i also had a finished ceiling above so the 2x4's werent quite feesible.
 
Brian Johns

Brian Johns

Member
Location
Kansas
peter d said:
What, are you from the west coast or something? ;)
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What, are you from the left coast or something?

Oh, and could you please explain, in depth, what the west coast has to do with this thread.
 
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