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Heya Larry! Have a masonry question for ya.

S

State of Jefferson

Member
Reframing the roof on this old shop building and I'd like your(and anyones) opinion of my plan for the new mudsill attachment.
The old mortar is basically crumbling, and the old sill was pretty much just sitting on there.
After chipping off the worst of the loose mortar, I was planning on roto-hammering and epoxy-ing in some all thread to hold it down, then lay down a little "curb" of new grout to set the new plate in. Then tighten my hold-down bolts. Can you think of any better approach?

Thanks a bunch.

Ben
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Don't know the exact history. Somewhere around 100 years old (pretty old for this part of the country). I know they used it as a hen house during the 2nd World War and sold eggs (semi)commercially.
The old roof was about to fall in, so breathing some new life into it.

Ben
 
If you roto-hammer and epoxy set all-thread, how many stones will you intercept. In other words, how much total ballast will the roof plate be attached to? I think we can assume that any stone that is drilled will suffer some or total detachment from the wall.

I'd be more inclined to run long anchors on the inside of the wall from the plate and into a concrete floor or inside butress.

But more to the point, I wouldn't spend good money after bad. Whatever you do to that building will not increase its value. I would be looking at a quality new building that is engineered for your site (think earthquake because you are in CA).
 
I appreciate your perspective Wardner, and to a certain extent I agree, it would be nice to really do the job right, and would also be nice to have a new building. But, the old roof that was only attached by toenails into the window frames, had held on fine for the last century or so. I think anything I do will be an improvement.
This particular building happens to be on my Mom's place in Central Oregon, not much of an earthquake risk here, and not much of one in MY part of California either I'm in the Very far northern end of the state. Most of the shaking happens farther south.

Ben
 
I have replaced the sill on several old rock basements. They did not have any mortar on them just sand and clay mix. To keep from loosening the rock I used a masonry hole saw not a hammer drill. I was able to drill a two inch hole about three feet down into the walls. I then bent a hook on some stainless steel threaded rod. I put it down in the hole. I then mixed silica sand and Portland cement at 2 to 1 ratio of sand to cement. I have found that silica sand mixed with a lot of Portland cement is real strong. The silica sand is clean so you get a better bond.

I had to tear out part of one wall, a few years later, to put in an outside entrance. It was hell getting the rock wall apart where the rod and cement bonded it all together. The oldest is twenty years old now and seems to be holding very well.
 
that is a nice building,Im glad your saving it You could also remove a few of the top stones and clamp a temperary form and put anchor bolts or your all thread with a bend on the bottom and then fill with concrete where you took the stone out,but when you take the form off you will see a patch of concrete instead of a stone,if you dont mind that little change of appearance that wiil work good too, Im not good at explaining things ,so my directions might be a little fuzzy, If you want to e mail me or ask more questions as your doing the job feel free
 
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