wood joists on top of an existing concrete wall

[structuralnerd]

Does anyone know a good way to attach a wood floor joist to an existing concrete wall? The joist sits on top of the wall. I looked in the Simpson catalog, and I couldn't find anything that was applicable. Would simply bolting a sill plate into the wall work, and the joist would just nail into the sill? Thanks!

 

[csd72]

Normal practice would be embedded bolts through a pressure treated sill plate. Bolts should be galvanised and pressure treatment should be of the lesser corrosive types.

 

[DarthSoilsGuy]

With what you've presented, i can't see an easier or more appropriate way than epoxy anchoring bolts for a new sill plate. nail or fasten into the plate as you normally would. i'm guessing this isn't a foundation/retaining wall since it is not pinned at the top currently.

 

[DWHA]

Depends on the application. What is on the ends to prevent horizontal movement. One option that I would consider is to use a piece of angle. Attach the angle to the sill plate and then bolt or lag or nail the timber joist to the angle. If there are a number of joists that are being used, consider using an angle not on every joist, but space them out and then use X bracing between them. Spacing to be determined by types of forces that will exist.

 

[concretemasonry]

If you install a P.T. sill plate and the concrete is in contact with the soil (even if coated/waterproofed), make sure the metal in contact with the sill is the proper type for corrosion resistance. - This includes the nails between the sill and joist, which are frequently overlooked.

 

[DonPhillips]

Simpson makes a threaded bolt you can install into the concrete to fasten a sill to the concrete.

Don Phillips

http://worthingtonengineering.com

 

[COEngineeer]

What don said.. its called strongbolt and it performs well under cracked concrete.

http://www.swijetty.com

Sea Water Intake and Jetty Construction

 

[wikidcool]

A 'strongbolt'? Not familiar with that one. Simpson's Titen-HD bolts are equiv. to embedded anchor bolts and don't need special inspections like the epoxy (sometimes) does.

If you want more attachment from joist to sill than toenails, Simpson (or whoever) makes lots of little utility clips for such things.

But yes, bolting a pressure treated sill to the top of the wall and sitting the joists on it is the typical way to make the connection.

 

[COEngineeer]

wikidcool, last I heard from simpson, they want people to use the strong bolt for any structural connection. They will still sell the titen-hd but those do not perform well when the concrete cracks (doesnt satisfy Appendix D). So you should start specifying strong bolts if you want mechanical anchors.

http://www.simpsonanchors.com/catalog/mechanical/strong-bolt/index.html

http://www.swijetty.com

Sea Water Intake and Jetty Construction